/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 19:55:25,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 19:55:25,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 19:55:25,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 19:55:25,888 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 19:55:25,910 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 19:55:25,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 19:55:25,910 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 19:55:25,910 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 19:55:25,911 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 19:55:25,912 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 19:55:25,912 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 19:55:25,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 19:55:25,912 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 19:55:25,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 19:55:25,912 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 19:55:25,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 19:55:25,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 19:55:25,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 19:55:25,913 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 19:55:25,913 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 19:55:25,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 19:55:25,913 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 19:55:25,914 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 19:55:25,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 19:55:25,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 19:55:25,914 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 19:55:25,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 19:55:25,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 19:55:25,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 19:55:25,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 19:55:25,915 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 19:55:25,915 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 19:55:25,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 19:55:25,915 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 19:55:25,915 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 19:55:25,915 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 19:55:26,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 19:55:26,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 19:55:26,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 19:55:26,259 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 19:55:26,260 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 19:55:26,261 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-trans.wvr.bpl [2021-06-12 19:55:26,261 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-trans.wvr.bpl' [2021-06-12 19:55:26,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 19:55:26,305 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 19:55:26,309 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 19:55:26,309 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 19:55:26,309 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 19:55:26,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:55:26" (1/1) ... [2021-06-12 19:55:26,329 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:55:26" (1/1) ... [2021-06-12 19:55:26,335 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 19:55:26,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 19:55:26,337 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 19:55:26,337 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 19:55:26,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:55:26" (1/1) ... [2021-06-12 19:55:26,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:55:26" (1/1) ... [2021-06-12 19:55:26,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:55:26" (1/1) ... [2021-06-12 19:55:26,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:55:26" (1/1) ... [2021-06-12 19:55:26,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:55:26" (1/1) ... [2021-06-12 19:55:26,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:55:26" (1/1) ... [2021-06-12 19:55:26,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:55:26" (1/1) ... [2021-06-12 19:55:26,357 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 19:55:26,358 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 19:55:26,358 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 19:55:26,358 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 19:55:26,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:55:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 19:55:26,438 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 19:55:26,438 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 19:55:26,438 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 19:55:26,439 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 19:55:26,439 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 19:55:26,439 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 19:55:26,439 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 19:55:26,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 19:55:26,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 19:55:26,440 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 19:55:26,440 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 19:55:26,440 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 19:55:26,441 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 19:55:26,822 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 19:55:26,822 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-06-12 19:55:26,824 INFO L202 PluginConnector]: Adding new model chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 07:55:26 BoogieIcfgContainer [2021-06-12 19:55:26,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 19:55:26,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 19:55:26,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 19:55:26,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 19:55:26,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:55:26" (1/2) ... [2021-06-12 19:55:26,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263a54d3 and model type chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 07:55:26, skipping insertion in model container [2021-06-12 19:55:26,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 07:55:26" (2/2) ... [2021-06-12 19:55:26,831 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-trans.wvr.bpl [2021-06-12 19:55:26,836 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 19:55:26,836 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 19:55:26,838 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 19:55:26,839 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 19:55:26,905 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-12 19:55:26,924 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-12 19:55:26,954 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 19:55:26,954 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 19:55:26,955 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 19:55:26,955 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 19:55:26,955 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 19:55:26,955 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 19:55:26,955 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 19:55:26,955 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 19:55:26,966 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2021-06-12 19:55:27,013 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,015 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:27,025 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:27,025 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:27,025 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:27,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:27,031 INFO L82 PathProgramCache]: Analyzing trace with hash 480470199, now seen corresponding path program 1 times [2021-06-12 19:55:27,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:27,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423253914] [2021-06-12 19:55:27,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:27,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:27,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:27,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423253914] [2021-06-12 19:55:27,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423253914] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:55:27,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:55:27,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 19:55:27,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809902587] [2021-06-12 19:55:27,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:55:27,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:27,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:55:27,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:55:27,226 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:27,281 INFO L93 Difference]: Finished difference Result 194 states and 539 transitions. [2021-06-12 19:55:27,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:55:27,282 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:27,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:27,296 INFO L225 Difference]: With dead ends: 194 [2021-06-12 19:55:27,296 INFO L226 Difference]: Without dead ends: 178 [2021-06-12 19:55:27,299 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:55:27,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-12 19:55:27,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 114. [2021-06-12 19:55:27,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.8761061946902653) internal successors, (325), 113 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 325 transitions. [2021-06-12 19:55:27,338 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 325 transitions. Word has length 17 [2021-06-12 19:55:27,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:27,339 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 325 transitions. [2021-06-12 19:55:27,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,339 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 325 transitions. [2021-06-12 19:55:27,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:27,341 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:27,341 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:27,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 19:55:27,341 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:27,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:27,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1062696049, now seen corresponding path program 2 times [2021-06-12 19:55:27,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:27,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956536024] [2021-06-12 19:55:27,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:27,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:27,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:27,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956536024] [2021-06-12 19:55:27,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956536024] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:55:27,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:55:27,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 19:55:27,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109221087] [2021-06-12 19:55:27,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:55:27,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:27,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:55:27,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:55:27,415 INFO L87 Difference]: Start difference. First operand 114 states and 325 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:27,434 INFO L93 Difference]: Finished difference Result 193 states and 552 transitions. [2021-06-12 19:55:27,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:55:27,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:27,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:27,437 INFO L225 Difference]: With dead ends: 193 [2021-06-12 19:55:27,437 INFO L226 Difference]: Without dead ends: 193 [2021-06-12 19:55:27,437 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:55:27,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-12 19:55:27,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 129. [2021-06-12 19:55:27,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.890625) internal successors, (370), 128 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2021-06-12 19:55:27,450 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2021-06-12 19:55:27,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:27,450 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2021-06-12 19:55:27,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,450 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2021-06-12 19:55:27,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:27,452 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:27,452 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:27,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 19:55:27,452 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:27,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:27,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1198421705, now seen corresponding path program 3 times [2021-06-12 19:55:27,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:27,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575727006] [2021-06-12 19:55:27,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:27,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:27,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:27,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575727006] [2021-06-12 19:55:27,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575727006] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:55:27,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:55:27,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 19:55:27,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185012244] [2021-06-12 19:55:27,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:55:27,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:27,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:55:27,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:55:27,514 INFO L87 Difference]: Start difference. First operand 129 states and 370 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:27,555 INFO L93 Difference]: Finished difference Result 238 states and 687 transitions. [2021-06-12 19:55:27,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:55:27,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:27,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:27,560 INFO L225 Difference]: With dead ends: 238 [2021-06-12 19:55:27,560 INFO L226 Difference]: Without dead ends: 238 [2021-06-12 19:55:27,560 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:55:27,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-12 19:55:27,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 149. [2021-06-12 19:55:27,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.939189189189189) internal successors, (435), 148 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 435 transitions. [2021-06-12 19:55:27,572 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 435 transitions. Word has length 17 [2021-06-12 19:55:27,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:27,573 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 435 transitions. [2021-06-12 19:55:27,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,573 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 435 transitions. [2021-06-12 19:55:27,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:27,574 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:27,575 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:27,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 19:55:27,575 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:27,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:27,575 INFO L82 PathProgramCache]: Analyzing trace with hash -2134989050, now seen corresponding path program 1 times [2021-06-12 19:55:27,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:27,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299352506] [2021-06-12 19:55:27,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:55:27,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:27,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299352506] [2021-06-12 19:55:27,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299352506] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:55:27,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:55:27,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 19:55:27,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803334160] [2021-06-12 19:55:27,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:55:27,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:27,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:55:27,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:55:27,614 INFO L87 Difference]: Start difference. First operand 149 states and 435 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:27,627 INFO L93 Difference]: Finished difference Result 237 states and 697 transitions. [2021-06-12 19:55:27,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 19:55:27,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:55:27,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:27,629 INFO L225 Difference]: With dead ends: 237 [2021-06-12 19:55:27,629 INFO L226 Difference]: Without dead ends: 178 [2021-06-12 19:55:27,630 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:55:27,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-12 19:55:27,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2021-06-12 19:55:27,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9491525423728815) internal successors, (522), 177 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 522 transitions. [2021-06-12 19:55:27,640 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 522 transitions. Word has length 18 [2021-06-12 19:55:27,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:27,641 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 522 transitions. [2021-06-12 19:55:27,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,641 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 522 transitions. [2021-06-12 19:55:27,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:55:27,642 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:27,642 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:27,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 19:55:27,643 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:27,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:27,643 INFO L82 PathProgramCache]: Analyzing trace with hash 479941677, now seen corresponding path program 1 times [2021-06-12 19:55:27,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:27,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008817435] [2021-06-12 19:55:27,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:27,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:55:27,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:27,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008817435] [2021-06-12 19:55:27,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008817435] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:55:27,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:55:27,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:55:27,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174206217] [2021-06-12 19:55:27,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:55:27,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:27,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:55:27,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:55:27,680 INFO L87 Difference]: Start difference. First operand 178 states and 522 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:27,704 INFO L93 Difference]: Finished difference Result 199 states and 585 transitions. [2021-06-12 19:55:27,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:55:27,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:55:27,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:27,706 INFO L225 Difference]: With dead ends: 199 [2021-06-12 19:55:27,706 INFO L226 Difference]: Without dead ends: 199 [2021-06-12 19:55:27,706 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:55:27,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-12 19:55:27,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2021-06-12 19:55:27,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9545454545454546) internal successors, (585), 198 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 585 transitions. [2021-06-12 19:55:27,716 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 585 transitions. Word has length 19 [2021-06-12 19:55:27,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:27,716 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 585 transitions. [2021-06-12 19:55:27,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,717 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 585 transitions. [2021-06-12 19:55:27,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:55:27,718 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:27,718 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:27,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 19:55:27,719 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:27,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:27,719 INFO L82 PathProgramCache]: Analyzing trace with hash -727237863, now seen corresponding path program 2 times [2021-06-12 19:55:27,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:27,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017532590] [2021-06-12 19:55:27,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:27,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:27,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:55:27,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:27,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017532590] [2021-06-12 19:55:27,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017532590] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:55:27,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:55:27,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:55:27,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804533721] [2021-06-12 19:55:27,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:55:27,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:27,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:55:27,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:55:27,767 INFO L87 Difference]: Start difference. First operand 199 states and 585 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:27,828 INFO L93 Difference]: Finished difference Result 303 states and 870 transitions. [2021-06-12 19:55:27,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:55:27,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:55:27,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:27,832 INFO L225 Difference]: With dead ends: 303 [2021-06-12 19:55:27,832 INFO L226 Difference]: Without dead ends: 303 [2021-06-12 19:55:27,833 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:55:27,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-12 19:55:27,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 206. [2021-06-12 19:55:27,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.9902439024390244) internal successors, (613), 205 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 613 transitions. [2021-06-12 19:55:27,854 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 613 transitions. Word has length 19 [2021-06-12 19:55:27,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:27,858 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 613 transitions. [2021-06-12 19:55:27,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,859 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 613 transitions. [2021-06-12 19:55:27,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:55:27,863 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:27,863 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:27,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 19:55:27,863 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:27,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:27,864 INFO L82 PathProgramCache]: Analyzing trace with hash -2087010031, now seen corresponding path program 3 times [2021-06-12 19:55:27,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:27,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747568471] [2021-06-12 19:55:27,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:27,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:27,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:55:27,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:27,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747568471] [2021-06-12 19:55:27,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747568471] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:55:27,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:55:27,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:55:27,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203442270] [2021-06-12 19:55:27,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:55:27,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:27,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:55:27,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:55:27,928 INFO L87 Difference]: Start difference. First operand 206 states and 613 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:27,977 INFO L93 Difference]: Finished difference Result 219 states and 632 transitions. [2021-06-12 19:55:27,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:55:27,977 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:55:27,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:27,979 INFO L225 Difference]: With dead ends: 219 [2021-06-12 19:55:27,979 INFO L226 Difference]: Without dead ends: 206 [2021-06-12 19:55:27,980 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:55:27,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-06-12 19:55:27,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2021-06-12 19:55:27,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.9560975609756097) internal successors, (606), 205 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 606 transitions. [2021-06-12 19:55:27,988 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 606 transitions. Word has length 19 [2021-06-12 19:55:27,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:27,988 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 606 transitions. [2021-06-12 19:55:27,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,989 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 606 transitions. [2021-06-12 19:55:27,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:55:27,990 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:27,990 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:27,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 19:55:27,990 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:27,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:27,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1343541745, now seen corresponding path program 4 times [2021-06-12 19:55:27,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:28,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087816996] [2021-06-12 19:55:28,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:28,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:28,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:55:28,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:28,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087816996] [2021-06-12 19:55:28,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087816996] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:55:28,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:55:28,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:55:28,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615841807] [2021-06-12 19:55:28,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:55:28,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:28,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:55:28,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:55:28,090 INFO L87 Difference]: Start difference. First operand 206 states and 606 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:28,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:28,131 INFO L93 Difference]: Finished difference Result 301 states and 859 transitions. [2021-06-12 19:55:28,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:55:28,132 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:55:28,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:28,133 INFO L225 Difference]: With dead ends: 301 [2021-06-12 19:55:28,133 INFO L226 Difference]: Without dead ends: 301 [2021-06-12 19:55:28,134 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:55:28,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-06-12 19:55:28,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 214. [2021-06-12 19:55:28,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.995305164319249) internal successors, (638), 213 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:28,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 638 transitions. [2021-06-12 19:55:28,142 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 638 transitions. Word has length 19 [2021-06-12 19:55:28,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:28,142 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 638 transitions. [2021-06-12 19:55:28,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:28,142 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 638 transitions. [2021-06-12 19:55:28,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:55:28,143 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:28,143 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:28,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-12 19:55:28,143 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:28,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:28,144 INFO L82 PathProgramCache]: Analyzing trace with hash -16230423, now seen corresponding path program 5 times [2021-06-12 19:55:28,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:28,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883225936] [2021-06-12 19:55:28,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:55:28,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:28,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883225936] [2021-06-12 19:55:28,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883225936] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:55:28,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:55:28,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:55:28,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506634236] [2021-06-12 19:55:28,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:55:28,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:28,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:55:28,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:55:28,200 INFO L87 Difference]: Start difference. First operand 214 states and 638 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:28,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:28,259 INFO L93 Difference]: Finished difference Result 314 states and 878 transitions. [2021-06-12 19:55:28,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:55:28,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:55:28,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:28,262 INFO L225 Difference]: With dead ends: 314 [2021-06-12 19:55:28,262 INFO L226 Difference]: Without dead ends: 301 [2021-06-12 19:55:28,262 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:55:28,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-06-12 19:55:28,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 207. [2021-06-12 19:55:28,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.9611650485436893) internal successors, (610), 206 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:28,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 610 transitions. [2021-06-12 19:55:28,269 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 610 transitions. Word has length 19 [2021-06-12 19:55:28,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:28,269 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 610 transitions. [2021-06-12 19:55:28,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:28,270 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 610 transitions. [2021-06-12 19:55:28,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:55:28,270 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:28,271 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:28,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-12 19:55:28,271 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:28,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:28,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1056854957, now seen corresponding path program 6 times [2021-06-12 19:55:28,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:28,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293667954] [2021-06-12 19:55:28,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:28,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:55:28,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:28,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293667954] [2021-06-12 19:55:28,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293667954] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:55:28,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:55:28,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:55:28,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192828956] [2021-06-12 19:55:28,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:55:28,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:28,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:55:28,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:55:28,317 INFO L87 Difference]: Start difference. First operand 207 states and 610 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:28,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:28,355 INFO L93 Difference]: Finished difference Result 231 states and 656 transitions. [2021-06-12 19:55:28,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:55:28,356 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:55:28,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:28,357 INFO L225 Difference]: With dead ends: 231 [2021-06-12 19:55:28,357 INFO L226 Difference]: Without dead ends: 195 [2021-06-12 19:55:28,357 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:55:28,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-12 19:55:28,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-06-12 19:55:28,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.922680412371134) internal successors, (567), 194 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:28,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 567 transitions. [2021-06-12 19:55:28,363 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 567 transitions. Word has length 19 [2021-06-12 19:55:28,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:28,363 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 567 transitions. [2021-06-12 19:55:28,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:28,364 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 567 transitions. [2021-06-12 19:55:28,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:55:28,364 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:28,364 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:28,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-12 19:55:28,365 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:28,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:28,365 INFO L82 PathProgramCache]: Analyzing trace with hash 3917895, now seen corresponding path program 1 times [2021-06-12 19:55:28,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:28,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756653475] [2021-06-12 19:55:28,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:55:28,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:28,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756653475] [2021-06-12 19:55:28,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756653475] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:55:28,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:55:28,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:55:28,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210159389] [2021-06-12 19:55:28,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:55:28,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:28,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:55:28,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:55:28,399 INFO L87 Difference]: Start difference. First operand 195 states and 567 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:28,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:28,433 INFO L93 Difference]: Finished difference Result 213 states and 621 transitions. [2021-06-12 19:55:28,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:55:28,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:55:28,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:28,435 INFO L225 Difference]: With dead ends: 213 [2021-06-12 19:55:28,435 INFO L226 Difference]: Without dead ends: 213 [2021-06-12 19:55:28,435 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:55:28,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-12 19:55:28,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 189. [2021-06-12 19:55:28,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:28,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-06-12 19:55:28,441 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2021-06-12 19:55:28,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:28,441 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-06-12 19:55:28,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:28,441 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-06-12 19:55:28,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:55:28,442 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:28,442 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:28,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-12 19:55:28,442 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:28,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:28,443 INFO L82 PathProgramCache]: Analyzing trace with hash 591663217, now seen corresponding path program 2 times [2021-06-12 19:55:28,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:28,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435864417] [2021-06-12 19:55:28,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:55:28,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:28,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435864417] [2021-06-12 19:55:28,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435864417] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:55:28,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:55:28,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:55:28,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467591971] [2021-06-12 19:55:28,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:55:28,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:28,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:55:28,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:55:28,474 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:28,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:28,509 INFO L93 Difference]: Finished difference Result 231 states and 675 transitions. [2021-06-12 19:55:28,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:55:28,510 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:55:28,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:28,511 INFO L225 Difference]: With dead ends: 231 [2021-06-12 19:55:28,511 INFO L226 Difference]: Without dead ends: 231 [2021-06-12 19:55:28,512 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:55:28,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-12 19:55:28,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 189. [2021-06-12 19:55:28,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:28,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-06-12 19:55:28,517 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2021-06-12 19:55:28,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:28,517 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-06-12 19:55:28,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:28,518 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-06-12 19:55:28,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:28,518 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:28,518 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:28,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-12 19:55:28,519 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:28,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:28,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1066078798, now seen corresponding path program 1 times [2021-06-12 19:55:28,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:28,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844850264] [2021-06-12 19:55:28,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:28,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:28,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:28,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844850264] [2021-06-12 19:55:28,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844850264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:28,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445603457] [2021-06-12 19:55:28,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:28,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:28,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:28,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:28,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:28,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:28,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:28,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:28,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:28,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:25 [2021-06-12 19:55:29,204 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 19:55:29,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:55:29,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:29,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:29,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:29,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:55:29,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:29,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:29,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:29,235 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:9 [2021-06-12 19:55:29,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:29,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445603457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:29,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:29,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:29,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603338200] [2021-06-12 19:55:29,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:29,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:29,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:29,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:29,296 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:30,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:30,488 INFO L93 Difference]: Finished difference Result 430 states and 1253 transitions. [2021-06-12 19:55:30,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:55:30,489 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:30,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:30,491 INFO L225 Difference]: With dead ends: 430 [2021-06-12 19:55:30,491 INFO L226 Difference]: Without dead ends: 415 [2021-06-12 19:55:30,492 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 860.6ms TimeCoverageRelationStatistics Valid=180, Invalid=750, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:55:30,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-06-12 19:55:30,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 211. [2021-06-12 19:55:30,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.9047619047619047) internal successors, (610), 210 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:30,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 610 transitions. [2021-06-12 19:55:30,500 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 610 transitions. Word has length 20 [2021-06-12 19:55:30,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:30,500 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 610 transitions. [2021-06-12 19:55:30,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:30,500 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 610 transitions. [2021-06-12 19:55:30,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:30,501 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:30,501 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:30,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-12 19:55:30,725 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:30,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:30,725 INFO L82 PathProgramCache]: Analyzing trace with hash -876621394, now seen corresponding path program 2 times [2021-06-12 19:55:30,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:30,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431540824] [2021-06-12 19:55:30,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:30,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:30,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:30,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431540824] [2021-06-12 19:55:30,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431540824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:30,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957341553] [2021-06-12 19:55:30,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:30,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:30,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:30,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:30,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:31,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:31,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:31,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:31,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:31,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-06-12 19:55:31,180 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 19:55:31,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:55:31,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:31,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:31,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:55:31,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:31,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,205 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:9 [2021-06-12 19:55:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:31,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957341553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:31,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:31,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:31,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057760824] [2021-06-12 19:55:31,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:31,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:31,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:31,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:31,256 INFO L87 Difference]: Start difference. First operand 211 states and 610 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:31,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:31,894 INFO L93 Difference]: Finished difference Result 350 states and 1015 transitions. [2021-06-12 19:55:31,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:55:31,895 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:31,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:31,897 INFO L225 Difference]: With dead ends: 350 [2021-06-12 19:55:31,897 INFO L226 Difference]: Without dead ends: 335 [2021-06-12 19:55:31,897 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 452.4ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:55:31,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-12 19:55:31,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 217. [2021-06-12 19:55:31,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.912037037037037) internal successors, (629), 216 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:31,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 629 transitions. [2021-06-12 19:55:31,904 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 629 transitions. Word has length 20 [2021-06-12 19:55:31,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:31,904 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 629 transitions. [2021-06-12 19:55:31,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:31,905 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 629 transitions. [2021-06-12 19:55:31,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:31,905 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:31,905 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:32,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 19:55:32,121 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:32,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:32,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1378412730, now seen corresponding path program 3 times [2021-06-12 19:55:32,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:32,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39782096] [2021-06-12 19:55:32,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:32,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:32,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:32,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:32,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39782096] [2021-06-12 19:55:32,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39782096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:32,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192522109] [2021-06-12 19:55:32,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:32,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:55:32,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:32,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:32,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:32,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:32,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:32,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:32,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:32,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:32,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-06-12 19:55:32,499 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 19:55:32,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:55:32,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:32,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:32,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:32,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:55:32,516 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:32,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:32,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:32,525 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:12 [2021-06-12 19:55:32,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:32,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192522109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:32,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:32,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:32,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636498107] [2021-06-12 19:55:32,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:32,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:32,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:32,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:32,594 INFO L87 Difference]: Start difference. First operand 217 states and 629 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:33,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:33,165 INFO L93 Difference]: Finished difference Result 356 states and 1028 transitions. [2021-06-12 19:55:33,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:55:33,166 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:33,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:33,168 INFO L225 Difference]: With dead ends: 356 [2021-06-12 19:55:33,168 INFO L226 Difference]: Without dead ends: 341 [2021-06-12 19:55:33,170 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 437.4ms TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:55:33,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-06-12 19:55:33,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 215. [2021-06-12 19:55:33,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.9065420560747666) internal successors, (622), 214 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:33,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 622 transitions. [2021-06-12 19:55:33,177 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 622 transitions. Word has length 20 [2021-06-12 19:55:33,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:33,177 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 622 transitions. [2021-06-12 19:55:33,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:33,177 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 622 transitions. [2021-06-12 19:55:33,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:33,178 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:33,178 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:33,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 19:55:33,400 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:33,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:33,401 INFO L82 PathProgramCache]: Analyzing trace with hash 809770446, now seen corresponding path program 4 times [2021-06-12 19:55:33,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:33,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830901248] [2021-06-12 19:55:33,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:33,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:33,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:33,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830901248] [2021-06-12 19:55:33,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830901248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:33,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777977090] [2021-06-12 19:55:33,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:33,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:33,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:33,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:33,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:33,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:33,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:33,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:33,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:33,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:23 [2021-06-12 19:55:33,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:55:33,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:33,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:33,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:55:33,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:33,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:33,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:33,795 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:12 [2021-06-12 19:55:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:33,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777977090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:33,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:33,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:33,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003467778] [2021-06-12 19:55:33,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:33,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:33,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:33,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:33,853 INFO L87 Difference]: Start difference. First operand 215 states and 622 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:34,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:34,305 INFO L93 Difference]: Finished difference Result 339 states and 983 transitions. [2021-06-12 19:55:34,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:55:34,306 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:34,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:34,308 INFO L225 Difference]: With dead ends: 339 [2021-06-12 19:55:34,308 INFO L226 Difference]: Without dead ends: 324 [2021-06-12 19:55:34,308 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 386.6ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:55:34,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-06-12 19:55:34,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 227. [2021-06-12 19:55:34,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.911504424778761) internal successors, (658), 226 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:34,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 658 transitions. [2021-06-12 19:55:34,315 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 658 transitions. Word has length 20 [2021-06-12 19:55:34,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:34,315 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 658 transitions. [2021-06-12 19:55:34,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:34,315 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 658 transitions. [2021-06-12 19:55:34,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:34,316 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:34,316 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:34,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:34,539 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:34,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:34,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1389597972, now seen corresponding path program 5 times [2021-06-12 19:55:34,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:34,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325823848] [2021-06-12 19:55:34,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:34,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:34,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:34,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325823848] [2021-06-12 19:55:34,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325823848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:34,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942486367] [2021-06-12 19:55:34,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:34,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:34,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:34,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:34,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:34,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:34,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:34,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:34,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:34,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-06-12 19:55:34,905 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 19:55:34,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:55:34,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:34,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:34,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:55:34,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:34,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:34,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:34,926 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:9 [2021-06-12 19:55:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:34,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942486367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:34,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:34,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:34,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349878287] [2021-06-12 19:55:34,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:34,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:34,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:34,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:34,969 INFO L87 Difference]: Start difference. First operand 227 states and 658 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:35,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:35,908 INFO L93 Difference]: Finished difference Result 487 states and 1405 transitions. [2021-06-12 19:55:35,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:55:35,909 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:35,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:35,911 INFO L225 Difference]: With dead ends: 487 [2021-06-12 19:55:35,911 INFO L226 Difference]: Without dead ends: 472 [2021-06-12 19:55:35,912 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 644.4ms TimeCoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:55:35,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-12 19:55:35,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 241. [2021-06-12 19:55:35,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.995833333333333) internal successors, (719), 240 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:35,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 719 transitions. [2021-06-12 19:55:35,917 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 719 transitions. Word has length 20 [2021-06-12 19:55:35,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:35,917 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 719 transitions. [2021-06-12 19:55:35,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:35,917 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 719 transitions. [2021-06-12 19:55:35,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:35,919 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:35,919 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:36,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-12 19:55:36,143 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:36,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:36,143 INFO L82 PathProgramCache]: Analyzing trace with hash 780645038, now seen corresponding path program 6 times [2021-06-12 19:55:36,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:36,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794154107] [2021-06-12 19:55:36,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:36,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:36,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794154107] [2021-06-12 19:55:36,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794154107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:36,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190357051] [2021-06-12 19:55:36,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:36,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:55:36,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:36,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:36,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:36,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:36,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:36,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:36,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:36,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:55:36,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:55:36,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:36,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:36,429 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:55:36,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:36,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:9 [2021-06-12 19:55:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:36,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190357051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:36,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:36,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:55:36,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265476336] [2021-06-12 19:55:36,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:55:36,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:36,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:55:36,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:55:36,449 INFO L87 Difference]: Start difference. First operand 241 states and 719 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:36,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:36,649 INFO L93 Difference]: Finished difference Result 333 states and 976 transitions. [2021-06-12 19:55:36,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:55:36,650 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:36,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:36,651 INFO L225 Difference]: With dead ends: 333 [2021-06-12 19:55:36,651 INFO L226 Difference]: Without dead ends: 318 [2021-06-12 19:55:36,651 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 147.1ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:55:36,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-12 19:55:36,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 247. [2021-06-12 19:55:36,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 3.016260162601626) internal successors, (742), 246 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:36,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 742 transitions. [2021-06-12 19:55:36,658 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 742 transitions. Word has length 20 [2021-06-12 19:55:36,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:36,658 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 742 transitions. [2021-06-12 19:55:36,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:36,658 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 742 transitions. [2021-06-12 19:55:36,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:36,659 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:36,659 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:36,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:36,881 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:36,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:36,881 INFO L82 PathProgramCache]: Analyzing trace with hash 278853702, now seen corresponding path program 7 times [2021-06-12 19:55:36,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:36,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348204739] [2021-06-12 19:55:36,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:36,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:37,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:37,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:37,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348204739] [2021-06-12 19:55:37,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348204739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:37,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803247504] [2021-06-12 19:55:37,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:37,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:37,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:37,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:37,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:37,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:37,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:37,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:55:37,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:55:37,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:37,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:37,152 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:55:37,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:37,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:12 [2021-06-12 19:55:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:37,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803247504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:37,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:37,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:55:37,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432029751] [2021-06-12 19:55:37,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:55:37,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:37,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:55:37,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:55:37,179 INFO L87 Difference]: Start difference. First operand 247 states and 742 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:37,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:37,344 INFO L93 Difference]: Finished difference Result 327 states and 963 transitions. [2021-06-12 19:55:37,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:55:37,344 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:37,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:37,345 INFO L225 Difference]: With dead ends: 327 [2021-06-12 19:55:37,345 INFO L226 Difference]: Without dead ends: 312 [2021-06-12 19:55:37,346 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 139.4ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:55:37,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-06-12 19:55:37,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 245. [2021-06-12 19:55:37,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 3.012295081967213) internal successors, (735), 244 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:37,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 735 transitions. [2021-06-12 19:55:37,353 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 735 transitions. Word has length 20 [2021-06-12 19:55:37,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:37,353 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 735 transitions. [2021-06-12 19:55:37,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:37,353 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 735 transitions. [2021-06-12 19:55:37,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:37,354 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:37,354 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:37,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:37,569 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:37,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:37,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1252991442, now seen corresponding path program 8 times [2021-06-12 19:55:37,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:37,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055906045] [2021-06-12 19:55:37,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:37,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:37,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:37,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055906045] [2021-06-12 19:55:37,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055906045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:37,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727508787] [2021-06-12 19:55:37,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:37,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:37,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:37,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:37,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:37,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:37,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:37,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:37,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:37,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:37,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:39 [2021-06-12 19:55:38,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:38,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:55:38,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:38,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:38,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:38,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:55:38,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:38,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:38,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:38,026 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:15 [2021-06-12 19:55:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:38,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727508787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:38,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:38,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:38,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486933815] [2021-06-12 19:55:38,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:38,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:38,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:38,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:38,085 INFO L87 Difference]: Start difference. First operand 245 states and 735 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:38,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:38,641 INFO L93 Difference]: Finished difference Result 388 states and 1142 transitions. [2021-06-12 19:55:38,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:55:38,641 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:38,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:38,643 INFO L225 Difference]: With dead ends: 388 [2021-06-12 19:55:38,643 INFO L226 Difference]: Without dead ends: 373 [2021-06-12 19:55:38,643 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 438.8ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:55:38,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-06-12 19:55:38,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 242. [2021-06-12 19:55:38,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 3.004149377593361) internal successors, (724), 241 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:38,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 724 transitions. [2021-06-12 19:55:38,650 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 724 transitions. Word has length 20 [2021-06-12 19:55:38,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:38,650 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 724 transitions. [2021-06-12 19:55:38,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:38,650 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 724 transitions. [2021-06-12 19:55:38,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:38,651 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:38,651 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:38,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-12 19:55:38,852 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:38,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:38,853 INFO L82 PathProgramCache]: Analyzing trace with hash 251310436, now seen corresponding path program 9 times [2021-06-12 19:55:38,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:38,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873732939] [2021-06-12 19:55:38,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:39,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:39,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:39,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873732939] [2021-06-12 19:55:39,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873732939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:39,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017432863] [2021-06-12 19:55:39,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:39,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:55:39,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:39,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:39,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:39,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:39,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:39,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:39,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:39,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:39,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:36 [2021-06-12 19:55:39,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:39,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:55:39,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:39,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:39,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:39,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:55:39,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:39,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:39,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:39,219 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:45, output treesize:15 [2021-06-12 19:55:39,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:39,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017432863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:39,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:39,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:39,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401190375] [2021-06-12 19:55:39,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:39,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:39,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:39,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:39,309 INFO L87 Difference]: Start difference. First operand 242 states and 724 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:39,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:39,727 INFO L93 Difference]: Finished difference Result 392 states and 1154 transitions. [2021-06-12 19:55:39,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:55:39,727 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:39,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:39,729 INFO L225 Difference]: With dead ends: 392 [2021-06-12 19:55:39,729 INFO L226 Difference]: Without dead ends: 377 [2021-06-12 19:55:39,729 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 313.3ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:39,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-06-12 19:55:39,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 241. [2021-06-12 19:55:39,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.995833333333333) internal successors, (719), 240 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:39,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 719 transitions. [2021-06-12 19:55:39,736 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 719 transitions. Word has length 20 [2021-06-12 19:55:39,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:39,736 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 719 transitions. [2021-06-12 19:55:39,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:39,736 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 719 transitions. [2021-06-12 19:55:39,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:39,737 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:39,737 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:39,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-12 19:55:39,953 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:39,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:39,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1438632468, now seen corresponding path program 10 times [2021-06-12 19:55:39,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:39,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130878422] [2021-06-12 19:55:39,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:40,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:40,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:40,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130878422] [2021-06-12 19:55:40,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130878422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:40,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020827873] [2021-06-12 19:55:40,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:40,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:40,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:40,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:40,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:40,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:40,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:40,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:55:40,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:55:40,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:40,207 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 19:55:40,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,208 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:15 [2021-06-12 19:55:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:40,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020827873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:40,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:40,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 19:55:40,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684798246] [2021-06-12 19:55:40,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:55:40,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:40,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:55:40,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:55:40,236 INFO L87 Difference]: Start difference. First operand 241 states and 719 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:40,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:40,404 INFO L93 Difference]: Finished difference Result 313 states and 920 transitions. [2021-06-12 19:55:40,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:55:40,404 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:40,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:40,405 INFO L225 Difference]: With dead ends: 313 [2021-06-12 19:55:40,405 INFO L226 Difference]: Without dead ends: 298 [2021-06-12 19:55:40,406 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:55:40,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-06-12 19:55:40,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 241. [2021-06-12 19:55:40,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.995833333333333) internal successors, (719), 240 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:40,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 719 transitions. [2021-06-12 19:55:40,412 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 719 transitions. Word has length 20 [2021-06-12 19:55:40,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:40,412 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 719 transitions. [2021-06-12 19:55:40,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:40,412 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 719 transitions. [2021-06-12 19:55:40,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:40,413 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:40,413 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:40,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 19:55:40,639 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:40,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:40,639 INFO L82 PathProgramCache]: Analyzing trace with hash -314612260, now seen corresponding path program 11 times [2021-06-12 19:55:40,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:40,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820009058] [2021-06-12 19:55:40,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:40,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:40,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:40,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820009058] [2021-06-12 19:55:40,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820009058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:40,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813476493] [2021-06-12 19:55:40,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:40,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:55:40,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:40,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:40,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:40,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:40,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:40,819 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:40,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:40,836 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:47 [2021-06-12 19:55:40,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:55:40,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 19:55:40,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:40,984 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:55:40,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:40,985 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:27 [2021-06-12 19:55:41,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:41,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813476493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:41,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:41,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:55:41,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327122890] [2021-06-12 19:55:41,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:41,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:41,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:41,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:41,054 INFO L87 Difference]: Start difference. First operand 241 states and 719 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:41,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:41,898 INFO L93 Difference]: Finished difference Result 525 states and 1564 transitions. [2021-06-12 19:55:41,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:55:41,899 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:41,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:41,901 INFO L225 Difference]: With dead ends: 525 [2021-06-12 19:55:41,901 INFO L226 Difference]: Without dead ends: 495 [2021-06-12 19:55:41,902 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 771.7ms TimeCoverageRelationStatistics Valid=204, Invalid=788, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:55:41,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-12 19:55:41,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 245. [2021-06-12 19:55:41,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.9959016393442623) internal successors, (731), 244 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:41,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 731 transitions. [2021-06-12 19:55:41,909 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 731 transitions. Word has length 20 [2021-06-12 19:55:41,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:41,910 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 731 transitions. [2021-06-12 19:55:41,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:41,910 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 731 transitions. [2021-06-12 19:55:41,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:41,910 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:41,911 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:42,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-12 19:55:42,125 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:42,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:42,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1996748574, now seen corresponding path program 12 times [2021-06-12 19:55:42,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:42,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951179193] [2021-06-12 19:55:42,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:42,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:42,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:42,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951179193] [2021-06-12 19:55:42,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951179193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:42,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925813366] [2021-06-12 19:55:42,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:42,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:55:42,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:42,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:42,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:42,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:42,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:42,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:42,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:42,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:20 [2021-06-12 19:55:42,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:55:42,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:42,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:42,341 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:55:42,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:42,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:9 [2021-06-12 19:55:42,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:42,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925813366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:42,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:42,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:55:42,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824708284] [2021-06-12 19:55:42,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:55:42,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:42,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:55:42,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:55:42,354 INFO L87 Difference]: Start difference. First operand 245 states and 731 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:42,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:42,494 INFO L93 Difference]: Finished difference Result 326 states and 964 transitions. [2021-06-12 19:55:42,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:55:42,494 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:42,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:42,495 INFO L225 Difference]: With dead ends: 326 [2021-06-12 19:55:42,495 INFO L226 Difference]: Without dead ends: 311 [2021-06-12 19:55:42,495 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:55:42,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-12 19:55:42,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 252. [2021-06-12 19:55:42,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 3.00398406374502) internal successors, (754), 251 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:42,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 754 transitions. [2021-06-12 19:55:42,501 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 754 transitions. Word has length 20 [2021-06-12 19:55:42,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:42,501 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 754 transitions. [2021-06-12 19:55:42,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:42,501 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 754 transitions. [2021-06-12 19:55:42,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:42,502 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:42,502 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:42,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-12 19:55:42,717 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:42,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:42,717 INFO L82 PathProgramCache]: Analyzing trace with hash 2032800900, now seen corresponding path program 13 times [2021-06-12 19:55:42,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:42,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769911417] [2021-06-12 19:55:42,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:42,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:42,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:42,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769911417] [2021-06-12 19:55:42,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769911417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:42,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815225451] [2021-06-12 19:55:42,843 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:42,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:42,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:42,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:42,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:42,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:42,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:42,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:20 [2021-06-12 19:55:42,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:55:42,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:42,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:42,974 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:55:42,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:42,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:12 [2021-06-12 19:55:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:42,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815225451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:42,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:42,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:55:42,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239952345] [2021-06-12 19:55:42,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:55:42,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:42,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:55:42,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:55:42,994 INFO L87 Difference]: Start difference. First operand 252 states and 754 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:43,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:43,156 INFO L93 Difference]: Finished difference Result 332 states and 977 transitions. [2021-06-12 19:55:43,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:55:43,156 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:43,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:43,158 INFO L225 Difference]: With dead ends: 332 [2021-06-12 19:55:43,158 INFO L226 Difference]: Without dead ends: 317 [2021-06-12 19:55:43,158 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:55:43,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-12 19:55:43,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 249. [2021-06-12 19:55:43,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.995967741935484) internal successors, (743), 248 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:43,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 743 transitions. [2021-06-12 19:55:43,163 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 743 transitions. Word has length 20 [2021-06-12 19:55:43,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:43,163 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 743 transitions. [2021-06-12 19:55:43,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:43,164 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 743 transitions. [2021-06-12 19:55:43,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:43,164 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:43,164 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:43,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-12 19:55:43,385 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:43,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:43,385 INFO L82 PathProgramCache]: Analyzing trace with hash -115995636, now seen corresponding path program 14 times [2021-06-12 19:55:43,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:43,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18277975] [2021-06-12 19:55:43,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:43,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:43,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:43,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18277975] [2021-06-12 19:55:43,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18277975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:43,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28435222] [2021-06-12 19:55:43,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:43,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:43,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:43,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:43,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:43,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:43,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:43,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:43,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:43,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-06-12 19:55:43,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:55:43,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:43,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:43,580 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:55:43,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:43,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:12 [2021-06-12 19:55:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:43,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28435222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:43,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:43,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:55:43,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867094104] [2021-06-12 19:55:43,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:55:43,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:43,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:55:43,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:55:43,601 INFO L87 Difference]: Start difference. First operand 249 states and 743 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:43,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:43,735 INFO L93 Difference]: Finished difference Result 327 states and 966 transitions. [2021-06-12 19:55:43,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:55:43,735 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:43,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:43,736 INFO L225 Difference]: With dead ends: 327 [2021-06-12 19:55:43,736 INFO L226 Difference]: Without dead ends: 312 [2021-06-12 19:55:43,737 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 114.0ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:55:43,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-06-12 19:55:43,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 262. [2021-06-12 19:55:43,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.992337164750958) internal successors, (781), 261 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:43,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 781 transitions. [2021-06-12 19:55:43,750 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 781 transitions. Word has length 20 [2021-06-12 19:55:43,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:43,750 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 781 transitions. [2021-06-12 19:55:43,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:43,750 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 781 transitions. [2021-06-12 19:55:43,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:43,751 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:43,751 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:43,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:43,965 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:43,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:43,965 INFO L82 PathProgramCache]: Analyzing trace with hash -742091602, now seen corresponding path program 15 times [2021-06-12 19:55:43,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:43,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053243826] [2021-06-12 19:55:43,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:44,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:44,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:44,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053243826] [2021-06-12 19:55:44,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053243826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:44,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644850463] [2021-06-12 19:55:44,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:44,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:55:44,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:44,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:44,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:44,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:44,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:44,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:44,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:44,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:55:44,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:55:44,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:44,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:44,288 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:55:44,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:44,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:9 [2021-06-12 19:55:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:44,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644850463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:44,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:44,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:55:44,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134480913] [2021-06-12 19:55:44,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:44,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:44,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:44,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:44,324 INFO L87 Difference]: Start difference. First operand 262 states and 781 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:44,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:44,527 INFO L93 Difference]: Finished difference Result 392 states and 1151 transitions. [2021-06-12 19:55:44,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:55:44,528 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:44,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:44,529 INFO L225 Difference]: With dead ends: 392 [2021-06-12 19:55:44,529 INFO L226 Difference]: Without dead ends: 377 [2021-06-12 19:55:44,529 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:44,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-06-12 19:55:44,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 268. [2021-06-12 19:55:44,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 3.0112359550561796) internal successors, (804), 267 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:44,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 804 transitions. [2021-06-12 19:55:44,535 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 804 transitions. Word has length 20 [2021-06-12 19:55:44,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:44,535 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 804 transitions. [2021-06-12 19:55:44,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:44,535 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 804 transitions. [2021-06-12 19:55:44,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:44,536 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:44,536 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:44,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:44,760 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:44,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:44,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1243882938, now seen corresponding path program 16 times [2021-06-12 19:55:44,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:44,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077768148] [2021-06-12 19:55:44,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:44,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:44,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:44,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:44,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077768148] [2021-06-12 19:55:44,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077768148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:44,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286109914] [2021-06-12 19:55:44,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:44,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:44,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:44,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:44,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:44,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:44,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:44,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:44,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:44,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:55:45,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:55:45,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:45,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:45,026 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:55:45,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:45,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:12 [2021-06-12 19:55:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:45,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286109914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:45,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:45,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:55:45,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672293453] [2021-06-12 19:55:45,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:45,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:45,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:45,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:45,077 INFO L87 Difference]: Start difference. First operand 268 states and 804 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:45,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:45,376 INFO L93 Difference]: Finished difference Result 386 states and 1138 transitions. [2021-06-12 19:55:45,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:55:45,377 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:45,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:45,378 INFO L225 Difference]: With dead ends: 386 [2021-06-12 19:55:45,378 INFO L226 Difference]: Without dead ends: 371 [2021-06-12 19:55:45,379 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:45,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-12 19:55:45,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 266. [2021-06-12 19:55:45,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 3.0075471698113208) internal successors, (797), 265 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:45,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 797 transitions. [2021-06-12 19:55:45,385 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 797 transitions. Word has length 20 [2021-06-12 19:55:45,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:45,385 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 797 transitions. [2021-06-12 19:55:45,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:45,385 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 797 transitions. [2021-06-12 19:55:45,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:45,386 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:45,386 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:45,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:45,586 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:45,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:45,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1519239214, now seen corresponding path program 17 times [2021-06-12 19:55:45,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:45,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501618358] [2021-06-12 19:55:45,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:45,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:45,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501618358] [2021-06-12 19:55:45,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501618358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:45,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089937593] [2021-06-12 19:55:45,706 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:45,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:45,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:45,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:45,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:45,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:45,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:45,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:45,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:45,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:55:45,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:55:45,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:45,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:45,830 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:55:45,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:45,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:12 [2021-06-12 19:55:45,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:45,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089937593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:45,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:45,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:55:45,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625401025] [2021-06-12 19:55:45,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:55:45,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:45,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:55:45,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:55:45,852 INFO L87 Difference]: Start difference. First operand 266 states and 797 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:45,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:45,995 INFO L93 Difference]: Finished difference Result 364 states and 1072 transitions. [2021-06-12 19:55:45,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:55:45,995 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:45,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:45,997 INFO L225 Difference]: With dead ends: 364 [2021-06-12 19:55:45,997 INFO L226 Difference]: Without dead ends: 349 [2021-06-12 19:55:45,997 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:55:45,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-12 19:55:46,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 263. [2021-06-12 19:55:46,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.0) internal successors, (786), 262 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:46,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 786 transitions. [2021-06-12 19:55:46,003 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 786 transitions. Word has length 20 [2021-06-12 19:55:46,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:46,003 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 786 transitions. [2021-06-12 19:55:46,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:46,003 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 786 transitions. [2021-06-12 19:55:46,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:46,004 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:46,004 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:46,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-12 19:55:46,217 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:46,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:46,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1271426204, now seen corresponding path program 18 times [2021-06-12 19:55:46,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:46,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851251824] [2021-06-12 19:55:46,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:46,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:46,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851251824] [2021-06-12 19:55:46,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851251824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:46,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778587091] [2021-06-12 19:55:46,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:46,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:55:46,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:46,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:46,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:46,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:46,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:46,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:46,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:46,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:55:46,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:55:46,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:46,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:46,431 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:55:46,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:46,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:15 [2021-06-12 19:55:46,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:46,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778587091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:46,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:46,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 19:55:46,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442996984] [2021-06-12 19:55:46,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:55:46,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:46,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:55:46,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:55:46,457 INFO L87 Difference]: Start difference. First operand 263 states and 786 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:46,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:46,640 INFO L93 Difference]: Finished difference Result 361 states and 1061 transitions. [2021-06-12 19:55:46,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:55:46,640 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:46,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:46,641 INFO L225 Difference]: With dead ends: 361 [2021-06-12 19:55:46,641 INFO L226 Difference]: Without dead ends: 346 [2021-06-12 19:55:46,642 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 116.2ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:55:46,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-12 19:55:46,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 262. [2021-06-12 19:55:46,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.992337164750958) internal successors, (781), 261 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:46,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 781 transitions. [2021-06-12 19:55:46,647 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 781 transitions. Word has length 20 [2021-06-12 19:55:46,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:46,647 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 781 transitions. [2021-06-12 19:55:46,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:46,648 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 781 transitions. [2021-06-12 19:55:46,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:46,648 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:46,648 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:46,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-12 19:55:46,853 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:46,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:46,853 INFO L82 PathProgramCache]: Analyzing trace with hash 418516700, now seen corresponding path program 19 times [2021-06-12 19:55:46,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:46,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81133058] [2021-06-12 19:55:46,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:46,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:46,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81133058] [2021-06-12 19:55:46,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81133058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:46,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205196399] [2021-06-12 19:55:46,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:46,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:46,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:47,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:47,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:47,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:47,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:47,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-06-12 19:55:47,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:55:47,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:47,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:47,078 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:55:47,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:47,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:15 [2021-06-12 19:55:47,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:47,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205196399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:47,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:47,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 19:55:47,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671307182] [2021-06-12 19:55:47,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:55:47,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:47,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:55:47,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:55:47,102 INFO L87 Difference]: Start difference. First operand 262 states and 781 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:47,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:47,299 INFO L93 Difference]: Finished difference Result 343 states and 1008 transitions. [2021-06-12 19:55:47,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:55:47,300 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:47,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:47,301 INFO L225 Difference]: With dead ends: 343 [2021-06-12 19:55:47,301 INFO L226 Difference]: Without dead ends: 328 [2021-06-12 19:55:47,302 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 126.6ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:55:47,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-06-12 19:55:47,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 262. [2021-06-12 19:55:47,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.992337164750958) internal successors, (781), 261 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:47,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 781 transitions. [2021-06-12 19:55:47,307 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 781 transitions. Word has length 20 [2021-06-12 19:55:47,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:47,307 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 781 transitions. [2021-06-12 19:55:47,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:47,307 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 781 transitions. [2021-06-12 19:55:47,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:47,308 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:47,308 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:47,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-12 19:55:47,532 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:47,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:47,533 INFO L82 PathProgramCache]: Analyzing trace with hash -730480638, now seen corresponding path program 20 times [2021-06-12 19:55:47,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:47,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71316151] [2021-06-12 19:55:47,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:47,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:47,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:47,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71316151] [2021-06-12 19:55:47,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71316151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:47,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308823715] [2021-06-12 19:55:47,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:47,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:47,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:47,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:47,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:47,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:47,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:47,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:47,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:47,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:47,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 19:55:47,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:47,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:55:47,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:47,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:47,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:47,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:55:47,887 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:47,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:47,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:47,899 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:12 [2021-06-12 19:55:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:47,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308823715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:47,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:47,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:47,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369288613] [2021-06-12 19:55:47,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:47,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:47,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:47,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:47,953 INFO L87 Difference]: Start difference. First operand 262 states and 781 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:48,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:48,332 INFO L93 Difference]: Finished difference Result 367 states and 1085 transitions. [2021-06-12 19:55:48,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:55:48,332 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:48,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:48,337 INFO L225 Difference]: With dead ends: 367 [2021-06-12 19:55:48,337 INFO L226 Difference]: Without dead ends: 352 [2021-06-12 19:55:48,339 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 329.7ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:48,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-06-12 19:55:48,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 260. [2021-06-12 19:55:48,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.996138996138996) internal successors, (776), 259 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:48,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 776 transitions. [2021-06-12 19:55:48,345 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 776 transitions. Word has length 20 [2021-06-12 19:55:48,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:48,345 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 776 transitions. [2021-06-12 19:55:48,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:48,345 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 776 transitions. [2021-06-12 19:55:48,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:48,346 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:48,346 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:48,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-12 19:55:48,565 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:48,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:48,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1584321884, now seen corresponding path program 21 times [2021-06-12 19:55:48,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:48,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374515609] [2021-06-12 19:55:48,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:48,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:48,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:48,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374515609] [2021-06-12 19:55:48,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374515609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:48,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533438896] [2021-06-12 19:55:48,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:48,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:55:48,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:48,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:48,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:48,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:48,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:48,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:48,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:48,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:48,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 19:55:48,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:48,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:55:48,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:48,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:48,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:48,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:55:48,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:48,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:48,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:48,952 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:12 [2021-06-12 19:55:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:49,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533438896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:49,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:49,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:49,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306240162] [2021-06-12 19:55:49,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:49,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:49,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:49,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:49,016 INFO L87 Difference]: Start difference. First operand 260 states and 776 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:49,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:49,351 INFO L93 Difference]: Finished difference Result 385 states and 1130 transitions. [2021-06-12 19:55:49,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:55:49,351 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:49,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:49,352 INFO L225 Difference]: With dead ends: 385 [2021-06-12 19:55:49,352 INFO L226 Difference]: Without dead ends: 370 [2021-06-12 19:55:49,352 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 342.4ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:49,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-12 19:55:49,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 263. [2021-06-12 19:55:49,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.0076335877862594) internal successors, (788), 262 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:49,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 788 transitions. [2021-06-12 19:55:49,358 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 788 transitions. Word has length 20 [2021-06-12 19:55:49,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:49,358 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 788 transitions. [2021-06-12 19:55:49,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:49,358 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 788 transitions. [2021-06-12 19:55:49,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:49,359 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:49,359 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:49,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:49,573 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:49,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:49,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1380717250, now seen corresponding path program 22 times [2021-06-12 19:55:49,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:49,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531853364] [2021-06-12 19:55:49,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:49,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:49,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531853364] [2021-06-12 19:55:49,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531853364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:49,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355777585] [2021-06-12 19:55:49,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:49,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:49,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:49,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:49,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:49,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:49,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:49,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:49,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:49,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:49,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 19:55:49,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:49,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:55:49,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:49,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:49,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:49,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:55:49,901 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:49,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:49,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:49,915 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:48, output treesize:18 [2021-06-12 19:55:50,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:50,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355777585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:50,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:50,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:50,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094537301] [2021-06-12 19:55:50,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:50,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:50,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:50,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:50,003 INFO L87 Difference]: Start difference. First operand 263 states and 788 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:50,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:50,326 INFO L93 Difference]: Finished difference Result 379 states and 1115 transitions. [2021-06-12 19:55:50,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:55:50,326 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:50,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:50,327 INFO L225 Difference]: With dead ends: 379 [2021-06-12 19:55:50,327 INFO L226 Difference]: Without dead ends: 364 [2021-06-12 19:55:50,328 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 347.1ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:50,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-12 19:55:50,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 259. [2021-06-12 19:55:50,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.992248062015504) internal successors, (772), 258 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:50,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 772 transitions. [2021-06-12 19:55:50,332 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 772 transitions. Word has length 20 [2021-06-12 19:55:50,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:50,333 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 772 transitions. [2021-06-12 19:55:50,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:50,333 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 772 transitions. [2021-06-12 19:55:50,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:50,333 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:50,333 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:50,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:50,537 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:50,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:50,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1002272404, now seen corresponding path program 23 times [2021-06-12 19:55:50,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:50,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073369518] [2021-06-12 19:55:50,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:50,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:50,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:50,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:50,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073369518] [2021-06-12 19:55:50,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073369518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:50,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102951570] [2021-06-12 19:55:50,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:50,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:55:50,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:50,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:50,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:50,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:50,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:50,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:50,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:50,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:50,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:50,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:50,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:50,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-12 19:55:50,841 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:103, output treesize:89 [2021-06-12 19:55:51,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:51,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 19:55:51,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:51,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:51,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:51,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:55:51,327 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:51,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:51,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:51,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:55:51,358 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:51,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:51,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:51,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-06-12 19:55:51,392 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:51,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:51,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:51,417 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:89, output treesize:27 [2021-06-12 19:55:51,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:51,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102951570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:51,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:51,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:51,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518417567] [2021-06-12 19:55:51,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:51,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:51,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:51,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:51,482 INFO L87 Difference]: Start difference. First operand 259 states and 772 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:51,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:51,906 INFO L93 Difference]: Finished difference Result 355 states and 1054 transitions. [2021-06-12 19:55:51,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:55:51,907 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:51,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:51,908 INFO L225 Difference]: With dead ends: 355 [2021-06-12 19:55:51,908 INFO L226 Difference]: Without dead ends: 340 [2021-06-12 19:55:51,908 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 449.6ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:55:51,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-12 19:55:51,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 269. [2021-06-12 19:55:51,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.0111940298507465) internal successors, (807), 268 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:51,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 807 transitions. [2021-06-12 19:55:51,913 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 807 transitions. Word has length 20 [2021-06-12 19:55:51,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:51,913 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 807 transitions. [2021-06-12 19:55:51,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:51,914 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 807 transitions. [2021-06-12 19:55:51,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:51,914 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:51,914 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:52,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-12 19:55:52,133 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:52,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:52,133 INFO L82 PathProgramCache]: Analyzing trace with hash 500481068, now seen corresponding path program 24 times [2021-06-12 19:55:52,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:52,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340728414] [2021-06-12 19:55:52,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:52,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:52,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:52,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340728414] [2021-06-12 19:55:52,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340728414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:52,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697426722] [2021-06-12 19:55:52,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:52,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:55:52,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:52,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:52,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:52,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:52,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:52,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:52,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:52,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:52,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:39 [2021-06-12 19:55:52,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:52,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:55:52,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:52,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:52,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:52,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:55:52,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:52,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:52,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:52,547 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:15 [2021-06-12 19:55:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:52,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697426722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:52,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:52,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:52,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050722186] [2021-06-12 19:55:52,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:52,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:52,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:52,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:52,609 INFO L87 Difference]: Start difference. First operand 269 states and 807 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:52,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:52,851 INFO L93 Difference]: Finished difference Result 357 states and 1051 transitions. [2021-06-12 19:55:52,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:55:52,851 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:52,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:52,852 INFO L225 Difference]: With dead ends: 357 [2021-06-12 19:55:52,852 INFO L226 Difference]: Without dead ends: 342 [2021-06-12 19:55:52,852 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 244.3ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:55:52,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-06-12 19:55:52,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 267. [2021-06-12 19:55:52,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 3.007518796992481) internal successors, (800), 266 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:52,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 800 transitions. [2021-06-12 19:55:52,857 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 800 transitions. Word has length 20 [2021-06-12 19:55:52,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:52,857 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 800 transitions. [2021-06-12 19:55:52,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:52,857 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 800 transitions. [2021-06-12 19:55:52,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:52,858 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:52,858 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:53,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:53,073 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:53,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:53,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1031364076, now seen corresponding path program 25 times [2021-06-12 19:55:53,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:53,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458245491] [2021-06-12 19:55:53,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:53,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:53,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:53,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458245491] [2021-06-12 19:55:53,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458245491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:53,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280928070] [2021-06-12 19:55:53,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:53,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:53,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:53,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:53,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:53,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:53,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:53,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:53,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:34 [2021-06-12 19:55:53,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:53,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:55:53,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:53,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:53,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:53,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:55:53,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:53,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:53,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:53,439 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:12 [2021-06-12 19:55:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:53,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280928070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:53,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:53,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:55:53,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872369755] [2021-06-12 19:55:53,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:55:53,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:53,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:55:53,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:55:53,458 INFO L87 Difference]: Start difference. First operand 267 states and 800 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:53,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:53,640 INFO L93 Difference]: Finished difference Result 335 states and 985 transitions. [2021-06-12 19:55:53,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:55:53,640 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:53,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:53,641 INFO L225 Difference]: With dead ends: 335 [2021-06-12 19:55:53,641 INFO L226 Difference]: Without dead ends: 320 [2021-06-12 19:55:53,641 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 161.7ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:55:53,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-06-12 19:55:53,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 264. [2021-06-12 19:55:53,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 3.0) internal successors, (789), 263 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:53,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 789 transitions. [2021-06-12 19:55:53,646 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 789 transitions. Word has length 20 [2021-06-12 19:55:53,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:53,647 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 789 transitions. [2021-06-12 19:55:53,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:53,647 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 789 transitions. [2021-06-12 19:55:53,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:53,647 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:53,648 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:53,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-06-12 19:55:53,865 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:53,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:53,865 INFO L82 PathProgramCache]: Analyzing trace with hash 472937802, now seen corresponding path program 26 times [2021-06-12 19:55:53,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:53,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670612948] [2021-06-12 19:55:53,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:54,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:54,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670612948] [2021-06-12 19:55:54,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670612948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:54,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960613981] [2021-06-12 19:55:54,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:54,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:54,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:54,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:54,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:54,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:54,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:54,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:54,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:54,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:54,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:34 [2021-06-12 19:55:54,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:54,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:55:54,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:54,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:54,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:54,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:55:54,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:54,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:54,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:54,187 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:15 [2021-06-12 19:55:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:54,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960613981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:54,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:54,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:55:54,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680848569] [2021-06-12 19:55:54,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:55:54,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:54,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:55:54,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:55:54,210 INFO L87 Difference]: Start difference. First operand 264 states and 789 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:54,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:54,385 INFO L93 Difference]: Finished difference Result 345 states and 1014 transitions. [2021-06-12 19:55:54,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:55:54,385 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:54,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:54,386 INFO L225 Difference]: With dead ends: 345 [2021-06-12 19:55:54,386 INFO L226 Difference]: Without dead ends: 330 [2021-06-12 19:55:54,387 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 167.2ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:55:54,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-06-12 19:55:54,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 263. [2021-06-12 19:55:54,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.9923664122137406) internal successors, (784), 262 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:54,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 784 transitions. [2021-06-12 19:55:54,391 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 784 transitions. Word has length 20 [2021-06-12 19:55:54,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:54,391 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 784 transitions. [2021-06-12 19:55:54,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:54,391 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 784 transitions. [2021-06-12 19:55:54,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:54,391 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:54,391 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:54,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:54,592 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:54,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:54,592 INFO L82 PathProgramCache]: Analyzing trace with hash -413101908, now seen corresponding path program 27 times [2021-06-12 19:55:54,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:54,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445987031] [2021-06-12 19:55:54,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:54,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:54,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:54,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445987031] [2021-06-12 19:55:54,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445987031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:54,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531039002] [2021-06-12 19:55:54,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:54,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:55:54,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:54,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:54,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:54,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:54,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:54,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:54,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:54,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:54,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:28 [2021-06-12 19:55:54,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:54,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:55:54,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:54,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:54,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:54,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:55:54,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:54,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:54,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:54,939 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:42, output treesize:12 [2021-06-12 19:55:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:54,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531039002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:54,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:54,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:55:54,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671322508] [2021-06-12 19:55:54,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:55:54,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:54,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:55:54,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:55:54,959 INFO L87 Difference]: Start difference. First operand 263 states and 784 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:55,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:55,135 INFO L93 Difference]: Finished difference Result 324 states and 957 transitions. [2021-06-12 19:55:55,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:55:55,136 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:55,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:55,137 INFO L225 Difference]: With dead ends: 324 [2021-06-12 19:55:55,137 INFO L226 Difference]: Without dead ends: 309 [2021-06-12 19:55:55,137 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 185.3ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:55:55,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-12 19:55:55,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 260. [2021-06-12 19:55:55,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.996138996138996) internal successors, (776), 259 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:55,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 776 transitions. [2021-06-12 19:55:55,142 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 776 transitions. Word has length 20 [2021-06-12 19:55:55,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:55,142 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 776 transitions. [2021-06-12 19:55:55,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:55,142 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 776 transitions. [2021-06-12 19:55:55,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:55,143 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:55,143 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:55,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-12 19:55:55,344 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:55,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:55,344 INFO L82 PathProgramCache]: Analyzing trace with hash -2132086590, now seen corresponding path program 28 times [2021-06-12 19:55:55,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:55,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173559013] [2021-06-12 19:55:55,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:55,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:55,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:55,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173559013] [2021-06-12 19:55:55,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173559013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:55,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902356863] [2021-06-12 19:55:55,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:55,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:55,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:55,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:55,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:55,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:55,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:55,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:55,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:55,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:55,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:28 [2021-06-12 19:55:55,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:55,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:55:55,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:55,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:55,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:55,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:55:55,607 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:55,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:55,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:55,615 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:42, output treesize:15 [2021-06-12 19:55:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:55,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902356863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:55,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:55,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:55:55,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008700312] [2021-06-12 19:55:55,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:55:55,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:55,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:55:55,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:55:55,634 INFO L87 Difference]: Start difference. First operand 260 states and 776 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:55,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:55,788 INFO L93 Difference]: Finished difference Result 350 states and 1025 transitions. [2021-06-12 19:55:55,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:55:55,788 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:55,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:55,789 INFO L225 Difference]: With dead ends: 350 [2021-06-12 19:55:55,789 INFO L226 Difference]: Without dead ends: 335 [2021-06-12 19:55:55,789 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 147.1ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:55:55,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-12 19:55:55,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 259. [2021-06-12 19:55:55,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.992248062015504) internal successors, (772), 258 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:55,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 772 transitions. [2021-06-12 19:55:55,793 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 772 transitions. Word has length 20 [2021-06-12 19:55:55,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:55,794 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 772 transitions. [2021-06-12 19:55:55,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:55,794 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 772 transitions. [2021-06-12 19:55:55,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:55,794 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:55,794 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:56,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:56,009 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:56,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:56,009 INFO L82 PathProgramCache]: Analyzing trace with hash -735699412, now seen corresponding path program 29 times [2021-06-12 19:55:56,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:56,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386324768] [2021-06-12 19:55:56,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:56,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:56,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:56,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386324768] [2021-06-12 19:55:56,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386324768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:56,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034269290] [2021-06-12 19:55:56,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:56,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:55:56,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:56,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:56,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:56,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:56,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:56,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:56,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:56,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 19:55:56,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:55:56,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:56,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:56,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:55:56,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:56,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:56,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:56,366 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 19:55:56,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:56,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034269290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:56,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:56,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:55:56,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228618736] [2021-06-12 19:55:56,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:55:56,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:56,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:55:56,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:55:56,388 INFO L87 Difference]: Start difference. First operand 259 states and 772 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:56,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:56,565 INFO L93 Difference]: Finished difference Result 319 states and 943 transitions. [2021-06-12 19:55:56,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:55:56,566 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:56,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:56,567 INFO L225 Difference]: With dead ends: 319 [2021-06-12 19:55:56,567 INFO L226 Difference]: Without dead ends: 304 [2021-06-12 19:55:56,567 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 168.7ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:55:56,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-12 19:55:56,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 265. [2021-06-12 19:55:56,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 3.003787878787879) internal successors, (793), 264 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:56,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 793 transitions. [2021-06-12 19:55:56,572 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 793 transitions. Word has length 20 [2021-06-12 19:55:56,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:56,572 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 793 transitions. [2021-06-12 19:55:56,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:56,572 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 793 transitions. [2021-06-12 19:55:56,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:56,573 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:56,573 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:56,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-12 19:55:56,785 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:56,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:56,785 INFO L82 PathProgramCache]: Analyzing trace with hash -2065627574, now seen corresponding path program 30 times [2021-06-12 19:55:56,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:56,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454657991] [2021-06-12 19:55:56,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:56,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:56,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:56,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454657991] [2021-06-12 19:55:56,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454657991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:56,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613284579] [2021-06-12 19:55:56,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:56,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:55:56,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:56,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:56,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:57,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:57,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:57,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:57,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:57,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:57,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 19:55:57,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:57,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:55:57,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:57,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:57,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:57,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:55:57,078 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:57,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:57,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:57,088 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:46, output treesize:15 [2021-06-12 19:55:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:57,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613284579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:57,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:57,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:57,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556693027] [2021-06-12 19:55:57,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:57,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:57,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:57,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:57,174 INFO L87 Difference]: Start difference. First operand 265 states and 793 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:57,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:57,399 INFO L93 Difference]: Finished difference Result 359 states and 1056 transitions. [2021-06-12 19:55:57,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:55:57,400 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:57,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:57,401 INFO L225 Difference]: With dead ends: 359 [2021-06-12 19:55:57,401 INFO L226 Difference]: Without dead ends: 344 [2021-06-12 19:55:57,401 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 229.2ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:55:57,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-12 19:55:57,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 262. [2021-06-12 19:55:57,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.992337164750958) internal successors, (781), 261 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:57,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 781 transitions. [2021-06-12 19:55:57,405 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 781 transitions. Word has length 20 [2021-06-12 19:55:57,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:57,405 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 781 transitions. [2021-06-12 19:55:57,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:57,405 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 781 transitions. [2021-06-12 19:55:57,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:57,406 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:57,406 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:57,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:57,606 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:57,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:57,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1314258234, now seen corresponding path program 31 times [2021-06-12 19:55:57,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:57,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141030767] [2021-06-12 19:55:57,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:57,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:57,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:57,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141030767] [2021-06-12 19:55:57,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141030767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:57,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325903197] [2021-06-12 19:55:57,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:57,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:57,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:57,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:57,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:57,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:57,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:57,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:57,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:31 [2021-06-12 19:55:57,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:57,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:55:57,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:57,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:57,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:57,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:55:57,881 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:57,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:57,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:57,892 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:45, output treesize:15 [2021-06-12 19:55:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:57,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325903197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:57,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:57,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:57,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619098418] [2021-06-12 19:55:57,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:57,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:57,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:57,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:57,970 INFO L87 Difference]: Start difference. First operand 262 states and 781 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:58,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:58,213 INFO L93 Difference]: Finished difference Result 351 states and 1037 transitions. [2021-06-12 19:55:58,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:55:58,214 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:58,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:58,215 INFO L225 Difference]: With dead ends: 351 [2021-06-12 19:55:58,215 INFO L226 Difference]: Without dead ends: 336 [2021-06-12 19:55:58,215 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 206.3ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:55:58,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-12 19:55:58,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 262. [2021-06-12 19:55:58,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.992337164750958) internal successors, (781), 261 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:58,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 781 transitions. [2021-06-12 19:55:58,219 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 781 transitions. Word has length 20 [2021-06-12 19:55:58,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:58,220 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 781 transitions. [2021-06-12 19:55:58,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:58,220 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 781 transitions. [2021-06-12 19:55:58,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:58,220 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:58,220 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:58,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-12 19:55:58,434 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:58,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:58,435 INFO L82 PathProgramCache]: Analyzing trace with hash 927087754, now seen corresponding path program 32 times [2021-06-12 19:55:58,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:58,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592487050] [2021-06-12 19:55:58,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:58,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:58,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:58,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592487050] [2021-06-12 19:55:58,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592487050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:58,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934448630] [2021-06-12 19:55:58,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:58,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:58,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:58,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:58,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:58,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:58,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:58,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 19:55:58,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:55:58,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:58,627 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:55:58,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:9 [2021-06-12 19:55:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:58,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934448630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:58,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:58,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:55:58,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266673369] [2021-06-12 19:55:58,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:58,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:58,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:58,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:58,654 INFO L87 Difference]: Start difference. First operand 262 states and 781 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:59,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:59,155 INFO L93 Difference]: Finished difference Result 629 states and 1844 transitions. [2021-06-12 19:55:59,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:55:59,156 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:59,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:59,158 INFO L225 Difference]: With dead ends: 629 [2021-06-12 19:55:59,158 INFO L226 Difference]: Without dead ends: 614 [2021-06-12 19:55:59,158 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 392.7ms TimeCoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:55:59,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-06-12 19:55:59,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 276. [2021-06-12 19:55:59,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.981818181818182) internal successors, (820), 275 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:59,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 820 transitions. [2021-06-12 19:55:59,163 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 820 transitions. Word has length 20 [2021-06-12 19:55:59,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:59,163 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 820 transitions. [2021-06-12 19:55:59,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:59,163 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 820 transitions. [2021-06-12 19:55:59,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:59,164 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:59,164 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:59,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-12 19:55:59,371 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:59,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:59,371 INFO L82 PathProgramCache]: Analyzing trace with hash -755048560, now seen corresponding path program 33 times [2021-06-12 19:55:59,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:59,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770697014] [2021-06-12 19:55:59,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:59,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:59,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:59,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:59,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770697014] [2021-06-12 19:55:59,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770697014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:59,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877043418] [2021-06-12 19:55:59,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:59,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:55:59,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:59,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:55:59,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:59,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:59,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:59,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:59,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:59,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:20 [2021-06-12 19:55:59,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:55:59,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:59,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:59,551 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:55:59,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:59,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:9 [2021-06-12 19:55:59,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:59,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877043418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:59,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:59,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:55:59,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668857803] [2021-06-12 19:55:59,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:55:59,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:59,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:55:59,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:55:59,562 INFO L87 Difference]: Start difference. First operand 276 states and 820 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:59,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:59,764 INFO L93 Difference]: Finished difference Result 469 states and 1378 transitions. [2021-06-12 19:55:59,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:55:59,764 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:55:59,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:59,766 INFO L225 Difference]: With dead ends: 469 [2021-06-12 19:55:59,766 INFO L226 Difference]: Without dead ends: 454 [2021-06-12 19:55:59,767 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:55:59,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-12 19:55:59,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 284. [2021-06-12 19:55:59,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.9964664310954063) internal successors, (848), 283 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:59,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 848 transitions. [2021-06-12 19:55:59,774 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 848 transitions. Word has length 20 [2021-06-12 19:55:59,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:59,774 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 848 transitions. [2021-06-12 19:55:59,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:59,774 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 848 transitions. [2021-06-12 19:55:59,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:55:59,775 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:59,775 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:59,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:59,999 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:00,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:00,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1020466382, now seen corresponding path program 34 times [2021-06-12 19:56:00,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:00,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630471197] [2021-06-12 19:56:00,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:00,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:00,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:00,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630471197] [2021-06-12 19:56:00,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630471197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:00,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138649466] [2021-06-12 19:56:00,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:00,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:00,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:00,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:00,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:00,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:00,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:00,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:00,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:00,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:20 [2021-06-12 19:56:00,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:00,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:00,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:00,165 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:00,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:00,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:12 [2021-06-12 19:56:00,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:00,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138649466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:00,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:00,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:56:00,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794819830] [2021-06-12 19:56:00,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:56:00,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:00,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:56:00,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:56:00,181 INFO L87 Difference]: Start difference. First operand 284 states and 848 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:00,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:00,342 INFO L93 Difference]: Finished difference Result 481 states and 1408 transitions. [2021-06-12 19:56:00,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:00,343 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:00,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:00,344 INFO L225 Difference]: With dead ends: 481 [2021-06-12 19:56:00,344 INFO L226 Difference]: Without dead ends: 466 [2021-06-12 19:56:00,344 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:56:00,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-06-12 19:56:00,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 280. [2021-06-12 19:56:00,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.982078853046595) internal successors, (832), 279 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:00,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 832 transitions. [2021-06-12 19:56:00,349 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 832 transitions. Word has length 20 [2021-06-12 19:56:00,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:00,349 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 832 transitions. [2021-06-12 19:56:00,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:00,349 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 832 transitions. [2021-06-12 19:56:00,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:00,349 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:00,350 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:00,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:00,550 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:00,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:00,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1125704378, now seen corresponding path program 35 times [2021-06-12 19:56:00,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:00,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704780639] [2021-06-12 19:56:00,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:00,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:00,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704780639] [2021-06-12 19:56:00,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704780639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:00,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741395981] [2021-06-12 19:56:00,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:00,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:56:00,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:00,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:56:00,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:00,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:00,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:00,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:00,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:00,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-06-12 19:56:00,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:56:00,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:00,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:56:00,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:00,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:00,730 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:00,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:56:00,730 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:35 [2021-06-12 19:56:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:00,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741395981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:00,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:00,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:56:00,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907605764] [2021-06-12 19:56:00,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:56:00,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:00,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:56:00,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:56:00,808 INFO L87 Difference]: Start difference. First operand 280 states and 832 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:01,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:01,042 INFO L93 Difference]: Finished difference Result 470 states and 1380 transitions. [2021-06-12 19:56:01,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:01,042 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:01,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:01,044 INFO L225 Difference]: With dead ends: 470 [2021-06-12 19:56:01,044 INFO L226 Difference]: Without dead ends: 455 [2021-06-12 19:56:01,045 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 217.6ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:01,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-06-12 19:56:01,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 272. [2021-06-12 19:56:01,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.981549815498155) internal successors, (808), 271 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:01,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 808 transitions. [2021-06-12 19:56:01,050 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 808 transitions. Word has length 20 [2021-06-12 19:56:01,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:01,050 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 808 transitions. [2021-06-12 19:56:01,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:01,050 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 808 transitions. [2021-06-12 19:56:01,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:01,051 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:01,051 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:01,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:01,261 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:01,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:01,261 INFO L82 PathProgramCache]: Analyzing trace with hash 2067877130, now seen corresponding path program 36 times [2021-06-12 19:56:01,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:01,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886317379] [2021-06-12 19:56:01,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:01,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:01,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:01,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886317379] [2021-06-12 19:56:01,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886317379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:01,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109200246] [2021-06-12 19:56:01,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:01,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:56:01,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:01,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:01,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:01,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:01,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:01,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:01,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:01,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:20 [2021-06-12 19:56:01,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:01,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:01,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:01,429 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:01,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:01,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:9 [2021-06-12 19:56:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:01,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109200246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:01,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:01,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:56:01,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242490216] [2021-06-12 19:56:01,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:56:01,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:01,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:56:01,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:56:01,453 INFO L87 Difference]: Start difference. First operand 272 states and 808 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:01,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:01,630 INFO L93 Difference]: Finished difference Result 487 states and 1433 transitions. [2021-06-12 19:56:01,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:01,631 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:01,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:01,632 INFO L225 Difference]: With dead ends: 487 [2021-06-12 19:56:01,633 INFO L226 Difference]: Without dead ends: 472 [2021-06-12 19:56:01,633 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:56:01,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-12 19:56:01,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 287. [2021-06-12 19:56:01,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.9965034965034967) internal successors, (857), 286 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:01,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 857 transitions. [2021-06-12 19:56:01,639 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 857 transitions. Word has length 20 [2021-06-12 19:56:01,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:01,639 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 857 transitions. [2021-06-12 19:56:01,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:01,639 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 857 transitions. [2021-06-12 19:56:01,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:01,640 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:01,640 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:01,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-12 19:56:01,853 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:01,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:01,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1802459308, now seen corresponding path program 37 times [2021-06-12 19:56:01,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:01,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643660752] [2021-06-12 19:56:01,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:01,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:01,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:01,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643660752] [2021-06-12 19:56:01,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643660752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:01,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871346940] [2021-06-12 19:56:01,928 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:01,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:01,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:01,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:01,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:01,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:01,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:01,993 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:20 [2021-06-12 19:56:01,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:02,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:02,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:02,004 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:02,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:02,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:12 [2021-06-12 19:56:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:02,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871346940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:02,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:02,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:56:02,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941070263] [2021-06-12 19:56:02,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:56:02,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:02,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:56:02,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:56:02,022 INFO L87 Difference]: Start difference. First operand 287 states and 857 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:02,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:02,183 INFO L93 Difference]: Finished difference Result 499 states and 1463 transitions. [2021-06-12 19:56:02,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:02,183 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:02,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:02,189 INFO L225 Difference]: With dead ends: 499 [2021-06-12 19:56:02,189 INFO L226 Difference]: Without dead ends: 484 [2021-06-12 19:56:02,189 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:56:02,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-12 19:56:02,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 283. [2021-06-12 19:56:02,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.982269503546099) internal successors, (841), 282 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:02,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 841 transitions. [2021-06-12 19:56:02,194 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 841 transitions. Word has length 20 [2021-06-12 19:56:02,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:02,195 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 841 transitions. [2021-06-12 19:56:02,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:02,195 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 841 transitions. [2021-06-12 19:56:02,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:02,195 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:02,196 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:02,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-12 19:56:02,419 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:02,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:02,419 INFO L82 PathProgramCache]: Analyzing trace with hash -346337228, now seen corresponding path program 38 times [2021-06-12 19:56:02,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:02,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676544597] [2021-06-12 19:56:02,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:02,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:02,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:02,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676544597] [2021-06-12 19:56:02,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676544597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:02,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93061171] [2021-06-12 19:56:02,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:02,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:02,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:02,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:02,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:02,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:02,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:02,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:02,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:02,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-06-12 19:56:02,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:56:02,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:02,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:02,586 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:02,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:02,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:12 [2021-06-12 19:56:02,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:02,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93061171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:02,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:02,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:56:02,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164531154] [2021-06-12 19:56:02,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:56:02,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:02,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:56:02,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:56:02,606 INFO L87 Difference]: Start difference. First operand 283 states and 841 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:02,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:02,825 INFO L93 Difference]: Finished difference Result 488 states and 1435 transitions. [2021-06-12 19:56:02,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:02,826 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:02,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:02,827 INFO L225 Difference]: With dead ends: 488 [2021-06-12 19:56:02,827 INFO L226 Difference]: Without dead ends: 473 [2021-06-12 19:56:02,827 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:56:02,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-06-12 19:56:02,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 279. [2021-06-12 19:56:02,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.9820143884892087) internal successors, (829), 278 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:02,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 829 transitions. [2021-06-12 19:56:02,833 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 829 transitions. Word has length 20 [2021-06-12 19:56:02,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:02,833 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 829 transitions. [2021-06-12 19:56:02,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:02,833 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 829 transitions. [2021-06-12 19:56:02,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:02,833 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:02,833 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:03,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:03,053 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:03,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:03,053 INFO L82 PathProgramCache]: Analyzing trace with hash 160009038, now seen corresponding path program 39 times [2021-06-12 19:56:03,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:03,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128238724] [2021-06-12 19:56:03,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:03,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:03,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:03,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128238724] [2021-06-12 19:56:03,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128238724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:03,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619613275] [2021-06-12 19:56:03,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:03,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:56:03,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:03,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:03,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:03,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:03,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:03,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:03,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:03,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-06-12 19:56:03,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:56:03,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:03,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:03,191 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:03,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:03,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:12 [2021-06-12 19:56:03,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:03,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619613275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:03,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:03,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:56:03,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793046656] [2021-06-12 19:56:03,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:56:03,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:03,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:56:03,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:56:03,228 INFO L87 Difference]: Start difference. First operand 279 states and 829 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:03,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:03,450 INFO L93 Difference]: Finished difference Result 592 states and 1740 transitions. [2021-06-12 19:56:03,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:03,451 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:03,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:03,452 INFO L225 Difference]: With dead ends: 592 [2021-06-12 19:56:03,452 INFO L226 Difference]: Without dead ends: 577 [2021-06-12 19:56:03,452 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:56:03,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-12 19:56:03,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 301. [2021-06-12 19:56:03,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.98) internal successors, (894), 300 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:03,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 894 transitions. [2021-06-12 19:56:03,458 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 894 transitions. Word has length 20 [2021-06-12 19:56:03,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:03,458 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 894 transitions. [2021-06-12 19:56:03,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:03,458 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 894 transitions. [2021-06-12 19:56:03,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:03,459 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:03,459 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:03,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:03,661 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:03,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:03,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1360504170, now seen corresponding path program 40 times [2021-06-12 19:56:03,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:03,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484631843] [2021-06-12 19:56:03,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:03,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:03,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:03,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484631843] [2021-06-12 19:56:03,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484631843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:03,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926098461] [2021-06-12 19:56:03,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:03,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:03,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:03,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:03,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:03,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:03,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:03,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:03,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:03,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:03,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 19:56:03,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:03,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:03,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:03,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:03,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:03,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:03,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:03,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:03,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:03,974 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:9 [2021-06-12 19:56:04,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:04,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926098461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:04,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:04,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:04,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873192610] [2021-06-12 19:56:04,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:04,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:04,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:04,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:04,009 INFO L87 Difference]: Start difference. First operand 301 states and 894 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:04,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:04,297 INFO L93 Difference]: Finished difference Result 437 states and 1290 transitions. [2021-06-12 19:56:04,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:56:04,297 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:04,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:04,298 INFO L225 Difference]: With dead ends: 437 [2021-06-12 19:56:04,298 INFO L226 Difference]: Without dead ends: 422 [2021-06-12 19:56:04,298 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 267.4ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:04,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-06-12 19:56:04,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 309. [2021-06-12 19:56:04,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9837662337662336) internal successors, (919), 308 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:04,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 919 transitions. [2021-06-12 19:56:04,308 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 919 transitions. Word has length 20 [2021-06-12 19:56:04,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:04,309 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 919 transitions. [2021-06-12 19:56:04,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:04,309 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 919 transitions. [2021-06-12 19:56:04,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:04,309 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:04,309 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:04,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:04,510 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:04,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:04,510 INFO L82 PathProgramCache]: Analyzing trace with hash 858712834, now seen corresponding path program 41 times [2021-06-12 19:56:04,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:04,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867045525] [2021-06-12 19:56:04,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:04,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:04,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867045525] [2021-06-12 19:56:04,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867045525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:04,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040467739] [2021-06-12 19:56:04,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:04,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:04,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:04,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:04,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:04,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:04,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:04,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:04,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:04,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:04,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 19:56:04,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:04,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:04,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:04,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:04,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:04,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:04,863 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:04,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:04,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:04,874 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:12 [2021-06-12 19:56:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:04,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040467739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:04,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:04,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:04,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602622934] [2021-06-12 19:56:04,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:04,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:04,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:04,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:04,917 INFO L87 Difference]: Start difference. First operand 309 states and 919 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:05,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:05,229 INFO L93 Difference]: Finished difference Result 443 states and 1303 transitions. [2021-06-12 19:56:05,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:56:05,229 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:05,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:05,230 INFO L225 Difference]: With dead ends: 443 [2021-06-12 19:56:05,230 INFO L226 Difference]: Without dead ends: 428 [2021-06-12 19:56:05,230 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 297.5ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:05,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-12 19:56:05,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 307. [2021-06-12 19:56:05,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.980392156862745) internal successors, (912), 306 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:05,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 912 transitions. [2021-06-12 19:56:05,234 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 912 transitions. Word has length 20 [2021-06-12 19:56:05,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:05,235 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 912 transitions. [2021-06-12 19:56:05,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:05,235 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 912 transitions. [2021-06-12 19:56:05,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:05,235 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:05,235 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:05,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-12 19:56:05,436 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:05,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:05,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1248071286, now seen corresponding path program 42 times [2021-06-12 19:56:05,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:05,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689031249] [2021-06-12 19:56:05,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:05,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:05,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:05,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689031249] [2021-06-12 19:56:05,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689031249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:05,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68553812] [2021-06-12 19:56:05,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:05,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:56:05,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:05,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:05,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:05,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:05,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:05,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:05,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:05,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:05,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 19:56:05,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:05,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:05,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:05,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:05,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:05,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:05,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:05,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:05,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:05,725 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:12 [2021-06-12 19:56:05,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:05,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68553812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:05,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:05,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:05,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990363453] [2021-06-12 19:56:05,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:05,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:05,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:05,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:05,768 INFO L87 Difference]: Start difference. First operand 307 states and 912 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:06,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:06,095 INFO L93 Difference]: Finished difference Result 450 states and 1327 transitions. [2021-06-12 19:56:06,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:56:06,095 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:06,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:06,096 INFO L225 Difference]: With dead ends: 450 [2021-06-12 19:56:06,096 INFO L226 Difference]: Without dead ends: 435 [2021-06-12 19:56:06,096 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 317.9ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:56:06,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-12 19:56:06,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 305. [2021-06-12 19:56:06,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9835526315789473) internal successors, (907), 304 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:06,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 907 transitions. [2021-06-12 19:56:06,101 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 907 transitions. Word has length 20 [2021-06-12 19:56:06,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:06,101 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 907 transitions. [2021-06-12 19:56:06,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:06,101 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 907 transitions. [2021-06-12 19:56:06,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:06,102 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:06,102 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:06,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:06,309 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:06,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:06,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1212563188, now seen corresponding path program 43 times [2021-06-12 19:56:06,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:06,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793467005] [2021-06-12 19:56:06,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:06,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:06,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:06,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:06,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793467005] [2021-06-12 19:56:06,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793467005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:06,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999173685] [2021-06-12 19:56:06,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:06,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:06,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:06,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:06,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:06,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:06,503 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 19:56:06,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:06,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:06,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:06,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:06,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,627 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:9 [2021-06-12 19:56:06,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:06,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999173685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:06,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:06,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:56:06,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034250819] [2021-06-12 19:56:06,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:56:06,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:06,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:56:06,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:56:06,637 INFO L87 Difference]: Start difference. First operand 305 states and 907 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:06,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:06,801 INFO L93 Difference]: Finished difference Result 387 states and 1133 transitions. [2021-06-12 19:56:06,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:06,802 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:06,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:06,802 INFO L225 Difference]: With dead ends: 387 [2021-06-12 19:56:06,802 INFO L226 Difference]: Without dead ends: 372 [2021-06-12 19:56:06,802 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 165.2ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:56:06,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-12 19:56:06,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 311. [2021-06-12 19:56:06,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.0) internal successors, (930), 310 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:06,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2021-06-12 19:56:06,807 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2021-06-12 19:56:06,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:06,807 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2021-06-12 19:56:06,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:06,807 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2021-06-12 19:56:06,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:06,808 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:06,808 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:07,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:07,021 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:07,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:07,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1714354524, now seen corresponding path program 44 times [2021-06-12 19:56:07,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:07,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573541368] [2021-06-12 19:56:07,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:07,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:07,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:07,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573541368] [2021-06-12 19:56:07,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573541368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:07,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341001028] [2021-06-12 19:56:07,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:07,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:07,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:07,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:07,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:07,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:07,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:07,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:07,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:07,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:07,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 19:56:07,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:07,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:07,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:07,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:07,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:07,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:07,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:07,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:07,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:07,318 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:12 [2021-06-12 19:56:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:07,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341001028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:07,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:07,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:56:07,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658403593] [2021-06-12 19:56:07,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:56:07,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:07,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:56:07,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:56:07,336 INFO L87 Difference]: Start difference. First operand 311 states and 930 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:07,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:07,513 INFO L93 Difference]: Finished difference Result 381 states and 1120 transitions. [2021-06-12 19:56:07,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:07,513 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:07,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:07,514 INFO L225 Difference]: With dead ends: 381 [2021-06-12 19:56:07,514 INFO L226 Difference]: Without dead ends: 366 [2021-06-12 19:56:07,514 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 158.2ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:56:07,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-12 19:56:07,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 309. [2021-06-12 19:56:07,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9967532467532467) internal successors, (923), 308 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:07,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 923 transitions. [2021-06-12 19:56:07,520 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 923 transitions. Word has length 20 [2021-06-12 19:56:07,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:07,520 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 923 transitions. [2021-06-12 19:56:07,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:07,520 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 923 transitions. [2021-06-12 19:56:07,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:07,521 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:07,521 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:07,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-12 19:56:07,729 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:07,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:07,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1048767628, now seen corresponding path program 45 times [2021-06-12 19:56:07,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:07,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459831806] [2021-06-12 19:56:07,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:07,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:07,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459831806] [2021-06-12 19:56:07,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459831806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:07,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733295377] [2021-06-12 19:56:07,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:07,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:56:07,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:07,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:07,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:07,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:07,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:07,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:07,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:07,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:07,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 19:56:08,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:08,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:08,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:08,014 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:08,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,022 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 19:56:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:08,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733295377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:08,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:08,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:08,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568162745] [2021-06-12 19:56:08,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:08,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:08,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:08,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:08,065 INFO L87 Difference]: Start difference. First operand 309 states and 923 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:08,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:08,360 INFO L93 Difference]: Finished difference Result 449 states and 1320 transitions. [2021-06-12 19:56:08,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:56:08,360 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:08,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:08,361 INFO L225 Difference]: With dead ends: 449 [2021-06-12 19:56:08,361 INFO L226 Difference]: Without dead ends: 434 [2021-06-12 19:56:08,361 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 256.7ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:08,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-06-12 19:56:08,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 306. [2021-06-12 19:56:08,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9901639344262296) internal successors, (912), 305 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:08,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 912 transitions. [2021-06-12 19:56:08,367 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 912 transitions. Word has length 20 [2021-06-12 19:56:08,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:08,367 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 912 transitions. [2021-06-12 19:56:08,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:08,367 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 912 transitions. [2021-06-12 19:56:08,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:08,368 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:08,368 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:08,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-12 19:56:08,577 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:08,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:08,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1741897790, now seen corresponding path program 46 times [2021-06-12 19:56:08,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:08,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712076576] [2021-06-12 19:56:08,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:08,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:08,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:08,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:08,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712076576] [2021-06-12 19:56:08,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712076576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:08,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333167774] [2021-06-12 19:56:08,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:08,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:08,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:08,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:08,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:08,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:08,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:08,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:08,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 19:56:08,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:08,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:08,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:08,802 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:08,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,811 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:46, output treesize:15 [2021-06-12 19:56:08,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:08,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333167774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:08,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:08,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:56:08,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679063889] [2021-06-12 19:56:08,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:56:08,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:08,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:56:08,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:56:08,830 INFO L87 Difference]: Start difference. First operand 306 states and 912 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:08,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:08,996 INFO L93 Difference]: Finished difference Result 389 states and 1142 transitions. [2021-06-12 19:56:08,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:08,996 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:08,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:08,997 INFO L225 Difference]: With dead ends: 389 [2021-06-12 19:56:08,997 INFO L226 Difference]: Without dead ends: 374 [2021-06-12 19:56:08,997 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:56:08,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-06-12 19:56:09,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 305. [2021-06-12 19:56:09,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9835526315789473) internal successors, (907), 304 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:09,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 907 transitions. [2021-06-12 19:56:09,002 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 907 transitions. Word has length 20 [2021-06-12 19:56:09,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:09,003 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 907 transitions. [2021-06-12 19:56:09,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:09,003 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 907 transitions. [2021-06-12 19:56:09,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:09,003 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:09,003 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:09,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-06-12 19:56:09,217 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:09,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:09,217 INFO L82 PathProgramCache]: Analyzing trace with hash -2101912532, now seen corresponding path program 47 times [2021-06-12 19:56:09,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:09,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676412806] [2021-06-12 19:56:09,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:09,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:09,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:09,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676412806] [2021-06-12 19:56:09,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676412806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:09,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937909082] [2021-06-12 19:56:09,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:09,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:09,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:09,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:09,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:09,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:09,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:09,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:09,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:09,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:09,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 19:56:09,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:09,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:09,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:09,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:09,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:09,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:09,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:09,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:09,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:09,514 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:12 [2021-06-12 19:56:09,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:09,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937909082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:09,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:09,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:09,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915916823] [2021-06-12 19:56:09,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:09,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:09,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:09,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:09,572 INFO L87 Difference]: Start difference. First operand 305 states and 907 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:09,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:09,949 INFO L93 Difference]: Finished difference Result 468 states and 1372 transitions. [2021-06-12 19:56:09,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:56:09,950 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:09,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:09,950 INFO L225 Difference]: With dead ends: 468 [2021-06-12 19:56:09,950 INFO L226 Difference]: Without dead ends: 453 [2021-06-12 19:56:09,950 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 322.1ms TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:56:09,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-12 19:56:09,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 308. [2021-06-12 19:56:09,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.993485342019544) internal successors, (919), 307 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:09,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 919 transitions. [2021-06-12 19:56:09,955 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 919 transitions. Word has length 20 [2021-06-12 19:56:09,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:09,955 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 919 transitions. [2021-06-12 19:56:09,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:09,955 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 919 transitions. [2021-06-12 19:56:09,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:09,955 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:09,955 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:10,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:10,156 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:10,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:10,156 INFO L82 PathProgramCache]: Analyzing trace with hash 863126602, now seen corresponding path program 48 times [2021-06-12 19:56:10,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:10,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170594944] [2021-06-12 19:56:10,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:10,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:10,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:10,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:10,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170594944] [2021-06-12 19:56:10,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170594944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:10,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340811547] [2021-06-12 19:56:10,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:10,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:56:10,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:10,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:10,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:10,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:10,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:10,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:10,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:10,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:10,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 19:56:10,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:10,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:10,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:10,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:10,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:10,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:10,446 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:10,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:10,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:10,457 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:46, output treesize:15 [2021-06-12 19:56:10,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:10,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340811547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:10,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:10,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:10,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979988324] [2021-06-12 19:56:10,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:10,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:10,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:10,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:10,527 INFO L87 Difference]: Start difference. First operand 308 states and 919 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:10,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:10,930 INFO L93 Difference]: Finished difference Result 462 states and 1357 transitions. [2021-06-12 19:56:10,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:56:10,930 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:10,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:10,931 INFO L225 Difference]: With dead ends: 462 [2021-06-12 19:56:10,931 INFO L226 Difference]: Without dead ends: 447 [2021-06-12 19:56:10,931 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 353.5ms TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:56:10,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-12 19:56:10,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 304. [2021-06-12 19:56:10,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.98019801980198) internal successors, (903), 303 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:10,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 903 transitions. [2021-06-12 19:56:10,935 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 903 transitions. Word has length 20 [2021-06-12 19:56:10,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:10,935 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 903 transitions. [2021-06-12 19:56:10,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:10,935 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 903 transitions. [2021-06-12 19:56:10,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:10,936 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:10,936 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:11,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:11,136 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:11,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:11,137 INFO L82 PathProgramCache]: Analyzing trace with hash 484681756, now seen corresponding path program 49 times [2021-06-12 19:56:11,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:11,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293608536] [2021-06-12 19:56:11,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:11,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:11,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293608536] [2021-06-12 19:56:11,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293608536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:11,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589424976] [2021-06-12 19:56:11,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:11,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:11,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:11,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:11,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:11,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-06-12 19:56:11,416 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_4]} [2021-06-12 19:56:11,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:11,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:11,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:11,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:11,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,432 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:9 [2021-06-12 19:56:11,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:11,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589424976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:11,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:11,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:11,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458818428] [2021-06-12 19:56:11,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:11,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:11,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:11,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:11,459 INFO L87 Difference]: Start difference. First operand 304 states and 903 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:11,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:11,747 INFO L93 Difference]: Finished difference Result 421 states and 1243 transitions. [2021-06-12 19:56:11,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:56:11,747 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:11,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:11,748 INFO L225 Difference]: With dead ends: 421 [2021-06-12 19:56:11,748 INFO L226 Difference]: Without dead ends: 406 [2021-06-12 19:56:11,748 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 229.1ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:11,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-06-12 19:56:11,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 314. [2021-06-12 19:56:11,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.9968051118210863) internal successors, (938), 313 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:11,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 938 transitions. [2021-06-12 19:56:11,753 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 938 transitions. Word has length 20 [2021-06-12 19:56:11,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:11,753 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 938 transitions. [2021-06-12 19:56:11,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:11,753 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 938 transitions. [2021-06-12 19:56:11,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:11,753 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:11,753 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:11,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:11,954 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:11,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:11,954 INFO L82 PathProgramCache]: Analyzing trace with hash -17109580, now seen corresponding path program 50 times [2021-06-12 19:56:11,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:11,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794197643] [2021-06-12 19:56:11,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:11,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:12,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:12,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:12,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794197643] [2021-06-12 19:56:12,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794197643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:12,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743404662] [2021-06-12 19:56:12,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:12,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:12,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:12,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:12,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:12,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:12,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:12,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:12,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:12,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:12,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-06-12 19:56:12,223 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_4]} [2021-06-12 19:56:12,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:12,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:12,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:12,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:12,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:12,237 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:12,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:12,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:12,246 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:12 [2021-06-12 19:56:12,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:12,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743404662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:12,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:12,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:12,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770866014] [2021-06-12 19:56:12,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:12,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:12,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:12,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:12,304 INFO L87 Difference]: Start difference. First operand 314 states and 938 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:12,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:12,620 INFO L93 Difference]: Finished difference Result 427 states and 1256 transitions. [2021-06-12 19:56:12,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:56:12,620 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:12,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:12,621 INFO L225 Difference]: With dead ends: 427 [2021-06-12 19:56:12,621 INFO L226 Difference]: Without dead ends: 412 [2021-06-12 19:56:12,621 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 279.2ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:12,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-06-12 19:56:12,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 312. [2021-06-12 19:56:12,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9935691318327975) internal successors, (931), 311 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:12,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 931 transitions. [2021-06-12 19:56:12,625 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 931 transitions. Word has length 20 [2021-06-12 19:56:12,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:12,625 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 931 transitions. [2021-06-12 19:56:12,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:12,626 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 931 transitions. [2021-06-12 19:56:12,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:12,626 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:12,626 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:12,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-12 19:56:12,827 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:12,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:12,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1548954724, now seen corresponding path program 51 times [2021-06-12 19:56:12,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:12,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740898682] [2021-06-12 19:56:12,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:12,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:12,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:12,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740898682] [2021-06-12 19:56:12,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740898682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:12,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719982835] [2021-06-12 19:56:12,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:12,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:56:12,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:12,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:12,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:13,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:13,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:13,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:13,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:13,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 19:56:13,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:13,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:13,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:13,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:13,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:13,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:13,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:13,130 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:12 [2021-06-12 19:56:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:13,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719982835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:13,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:13,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:56:13,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600185113] [2021-06-12 19:56:13,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:56:13,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:13,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:56:13,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:56:13,143 INFO L87 Difference]: Start difference. First operand 312 states and 931 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:13,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:13,338 INFO L93 Difference]: Finished difference Result 380 states and 1116 transitions. [2021-06-12 19:56:13,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:13,338 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:13,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:13,339 INFO L225 Difference]: With dead ends: 380 [2021-06-12 19:56:13,339 INFO L226 Difference]: Without dead ends: 365 [2021-06-12 19:56:13,339 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 153.7ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:56:13,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-06-12 19:56:13,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 309. [2021-06-12 19:56:13,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.987012987012987) internal successors, (920), 308 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:13,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 920 transitions. [2021-06-12 19:56:13,343 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 920 transitions. Word has length 20 [2021-06-12 19:56:13,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:13,343 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 920 transitions. [2021-06-12 19:56:13,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:13,343 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 920 transitions. [2021-06-12 19:56:13,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:13,344 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:13,344 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:13,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-12 19:56:13,544 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:13,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:13,545 INFO L82 PathProgramCache]: Analyzing trace with hash -44652846, now seen corresponding path program 52 times [2021-06-12 19:56:13,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:13,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681732204] [2021-06-12 19:56:13,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:13,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:13,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:13,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681732204] [2021-06-12 19:56:13,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681732204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:13,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306818781] [2021-06-12 19:56:13,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:13,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:13,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:13,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:13,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:13,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:13,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:13,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:13,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:13,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 19:56:13,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:13,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:13,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:13,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:13,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:13,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:13,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:13,831 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:15 [2021-06-12 19:56:13,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:13,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306818781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:13,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:13,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:56:13,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177308716] [2021-06-12 19:56:13,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:56:13,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:13,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:56:13,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:56:13,852 INFO L87 Difference]: Start difference. First operand 309 states and 920 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:14,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:14,071 INFO L93 Difference]: Finished difference Result 390 states and 1145 transitions. [2021-06-12 19:56:14,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:14,072 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:14,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:14,073 INFO L225 Difference]: With dead ends: 390 [2021-06-12 19:56:14,073 INFO L226 Difference]: Without dead ends: 375 [2021-06-12 19:56:14,073 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:56:14,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-06-12 19:56:14,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 308. [2021-06-12 19:56:14,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.980456026058632) internal successors, (915), 307 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:14,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 915 transitions. [2021-06-12 19:56:14,078 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 915 transitions. Word has length 20 [2021-06-12 19:56:14,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:14,078 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 915 transitions. [2021-06-12 19:56:14,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:14,078 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 915 transitions. [2021-06-12 19:56:14,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:14,079 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:14,079 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:14,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:14,280 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:14,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:14,280 INFO L82 PathProgramCache]: Analyzing trace with hash -930692556, now seen corresponding path program 53 times [2021-06-12 19:56:14,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:14,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502634816] [2021-06-12 19:56:14,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:14,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:14,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502634816] [2021-06-12 19:56:14,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502634816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:14,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74590309] [2021-06-12 19:56:14,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:14,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:56:14,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:14,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:56:14,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:14,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:14,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:14,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:14,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:14,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:25 [2021-06-12 19:56:14,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:14,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:14,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:56:14,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:14,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:14,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:56:14,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:14,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:14,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:14,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:14,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:14,620 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:14,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:14,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:14,625 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:14,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:14,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:56:14,655 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:79, output treesize:35 [2021-06-12 19:56:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:14,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74590309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:14,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:14,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:14,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621916782] [2021-06-12 19:56:14,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:14,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:14,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:14,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:14,755 INFO L87 Difference]: Start difference. First operand 308 states and 915 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:15,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:15,078 INFO L93 Difference]: Finished difference Result 369 states and 1088 transitions. [2021-06-12 19:56:15,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:15,078 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:15,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:15,079 INFO L225 Difference]: With dead ends: 369 [2021-06-12 19:56:15,079 INFO L226 Difference]: Without dead ends: 354 [2021-06-12 19:56:15,079 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 304.4ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:15,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-12 19:56:15,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 305. [2021-06-12 19:56:15,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9835526315789473) internal successors, (907), 304 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:15,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 907 transitions. [2021-06-12 19:56:15,083 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 907 transitions. Word has length 20 [2021-06-12 19:56:15,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:15,083 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 907 transitions. [2021-06-12 19:56:15,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:15,083 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 907 transitions. [2021-06-12 19:56:15,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:15,084 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:15,084 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:15,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:15,284 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:15,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:15,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1645290058, now seen corresponding path program 54 times [2021-06-12 19:56:15,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:15,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095901852] [2021-06-12 19:56:15,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:15,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:15,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:15,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095901852] [2021-06-12 19:56:15,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095901852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:15,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513373046] [2021-06-12 19:56:15,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:15,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:56:15,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:15,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:15,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:15,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:15,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:15,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:15,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:15,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:30 [2021-06-12 19:56:15,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:15,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:56:15,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:15,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:15,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:15,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:15,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:15,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:15,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:15,586 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:39, output treesize:15 [2021-06-12 19:56:15,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:15,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513373046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:15,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:15,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:15,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464494618] [2021-06-12 19:56:15,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:15,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:15,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:15,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:15,670 INFO L87 Difference]: Start difference. First operand 305 states and 907 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:15,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:15,981 INFO L93 Difference]: Finished difference Result 445 states and 1304 transitions. [2021-06-12 19:56:15,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:56:15,982 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:15,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:15,983 INFO L225 Difference]: With dead ends: 445 [2021-06-12 19:56:15,983 INFO L226 Difference]: Without dead ends: 430 [2021-06-12 19:56:15,983 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 262.9ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:56:15,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-12 19:56:15,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 304. [2021-06-12 19:56:15,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.98019801980198) internal successors, (903), 303 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:15,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 903 transitions. [2021-06-12 19:56:15,989 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 903 transitions. Word has length 20 [2021-06-12 19:56:15,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:15,989 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 903 transitions. [2021-06-12 19:56:15,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:15,989 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 903 transitions. [2021-06-12 19:56:15,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:15,990 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:15,990 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:16,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-12 19:56:16,214 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:16,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:16,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1253290060, now seen corresponding path program 55 times [2021-06-12 19:56:16,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:16,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860084086] [2021-06-12 19:56:16,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:16,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:16,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:16,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:16,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860084086] [2021-06-12 19:56:16,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860084086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:16,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792886828] [2021-06-12 19:56:16,323 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:16,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:16,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:16,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:16,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:16,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:16,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:16,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:16,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 19:56:16,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:16,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:16,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:16,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:16,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:16,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:16,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:16,536 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:42, output treesize:12 [2021-06-12 19:56:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:16,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792886828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:16,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:16,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:56:16,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225182051] [2021-06-12 19:56:16,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:56:16,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:16,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:56:16,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:56:16,563 INFO L87 Difference]: Start difference. First operand 304 states and 903 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:16,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:16,741 INFO L93 Difference]: Finished difference Result 364 states and 1074 transitions. [2021-06-12 19:56:16,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:16,741 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:16,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:16,742 INFO L225 Difference]: With dead ends: 364 [2021-06-12 19:56:16,742 INFO L226 Difference]: Without dead ends: 349 [2021-06-12 19:56:16,742 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:56:16,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-12 19:56:16,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 310. [2021-06-12 19:56:16,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9902912621359223) internal successors, (924), 309 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:16,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 924 transitions. [2021-06-12 19:56:16,745 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 924 transitions. Word has length 20 [2021-06-12 19:56:16,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:16,745 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 924 transitions. [2021-06-12 19:56:16,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:16,746 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 924 transitions. [2021-06-12 19:56:16,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:16,746 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:16,746 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:16,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:16,947 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:16,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:16,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1711749074, now seen corresponding path program 56 times [2021-06-12 19:56:16,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:16,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614220146] [2021-06-12 19:56:16,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:17,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:17,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614220146] [2021-06-12 19:56:17,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614220146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:17,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886132155] [2021-06-12 19:56:17,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:17,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:17,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:17,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:17,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:17,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:17,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:17,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:17,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:17,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:17,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-06-12 19:56:17,202 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_0]} [2021-06-12 19:56:17,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:17,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:17,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:17,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:17,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:17,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:17,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:17,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:17,225 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:40, output treesize:15 [2021-06-12 19:56:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:17,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886132155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:17,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:17,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:17,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226213269] [2021-06-12 19:56:17,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:17,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:17,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:17,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:17,284 INFO L87 Difference]: Start difference. First operand 310 states and 924 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:17,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:17,522 INFO L93 Difference]: Finished difference Result 430 states and 1264 transitions. [2021-06-12 19:56:17,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:56:17,522 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:17,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:17,523 INFO L225 Difference]: With dead ends: 430 [2021-06-12 19:56:17,523 INFO L226 Difference]: Without dead ends: 415 [2021-06-12 19:56:17,523 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 250.2ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:56:17,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-06-12 19:56:17,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 307. [2021-06-12 19:56:17,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.980392156862745) internal successors, (912), 306 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:17,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 912 transitions. [2021-06-12 19:56:17,527 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 912 transitions. Word has length 20 [2021-06-12 19:56:17,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:17,527 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 912 transitions. [2021-06-12 19:56:17,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:17,527 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 912 transitions. [2021-06-12 19:56:17,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:17,528 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:17,528 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:17,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:17,728 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:17,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:17,729 INFO L82 PathProgramCache]: Analyzing trace with hash 796667586, now seen corresponding path program 57 times [2021-06-12 19:56:17,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:17,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814849474] [2021-06-12 19:56:17,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:17,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:17,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814849474] [2021-06-12 19:56:17,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814849474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:17,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89642333] [2021-06-12 19:56:17,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:17,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:56:17,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:17,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:17,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:17,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:17,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:17,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:17,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:17,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:30 [2021-06-12 19:56:17,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:17,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:56:17,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:17,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:17,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:17,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:17,987 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:17,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:17,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:17,994 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:39, output treesize:15 [2021-06-12 19:56:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:18,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89642333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:18,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:18,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:18,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492791320] [2021-06-12 19:56:18,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:18,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:18,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:18,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:18,053 INFO L87 Difference]: Start difference. First operand 307 states and 912 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:18,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:18,278 INFO L93 Difference]: Finished difference Result 418 states and 1233 transitions. [2021-06-12 19:56:18,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:56:18,279 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:18,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:18,279 INFO L225 Difference]: With dead ends: 418 [2021-06-12 19:56:18,279 INFO L226 Difference]: Without dead ends: 403 [2021-06-12 19:56:18,280 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 246.9ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:56:18,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-12 19:56:18,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 303. [2021-06-12 19:56:18,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.980132450331126) internal successors, (900), 302 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:18,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 900 transitions. [2021-06-12 19:56:18,283 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 900 transitions. Word has length 20 [2021-06-12 19:56:18,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:18,283 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 900 transitions. [2021-06-12 19:56:18,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:18,284 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 900 transitions. [2021-06-12 19:56:18,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:18,284 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:18,284 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:18,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:18,485 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:18,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:18,485 INFO L82 PathProgramCache]: Analyzing trace with hash -722189394, now seen corresponding path program 58 times [2021-06-12 19:56:18,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:18,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019070027] [2021-06-12 19:56:18,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:18,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:18,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019070027] [2021-06-12 19:56:18,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019070027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:18,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707231783] [2021-06-12 19:56:18,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:18,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:18,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:18,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:18,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:18,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:18,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:18,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:18,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:18,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:56:18,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:18,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:18,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:18,767 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:18,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:18,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:9 [2021-06-12 19:56:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:18,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707231783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:18,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:18,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:56:18,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832844210] [2021-06-12 19:56:18,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:18,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:18,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:18,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:18,802 INFO L87 Difference]: Start difference. First operand 303 states and 900 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:19,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:19,147 INFO L93 Difference]: Finished difference Result 473 states and 1398 transitions. [2021-06-12 19:56:19,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:56:19,147 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:19,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:19,148 INFO L225 Difference]: With dead ends: 473 [2021-06-12 19:56:19,148 INFO L226 Difference]: Without dead ends: 458 [2021-06-12 19:56:19,148 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 257.4ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:56:19,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-12 19:56:19,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 320. [2021-06-12 19:56:19,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.9968652037617556) internal successors, (956), 319 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:19,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 956 transitions. [2021-06-12 19:56:19,152 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 956 transitions. Word has length 20 [2021-06-12 19:56:19,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:19,153 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 956 transitions. [2021-06-12 19:56:19,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:19,153 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 956 transitions. [2021-06-12 19:56:19,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:19,153 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:19,155 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:19,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-06-12 19:56:19,372 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:19,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:19,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1223980730, now seen corresponding path program 59 times [2021-06-12 19:56:19,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:19,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939204228] [2021-06-12 19:56:19,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:19,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:19,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:19,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:19,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939204228] [2021-06-12 19:56:19,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939204228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:19,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196761200] [2021-06-12 19:56:19,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:19,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:56:19,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:19,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:56:19,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:19,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:19,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:19,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:19,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:19,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:19,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:56:19,601 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-06-12 19:56:19,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 19:56:19,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:19,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:19,697 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:19,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:19,710 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:19,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:56:19,711 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:33 [2021-06-12 19:56:19,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:19,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196761200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:19,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:19,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:56:19,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840186416] [2021-06-12 19:56:19,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:19,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:19,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:19,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:19,821 INFO L87 Difference]: Start difference. First operand 320 states and 956 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:20,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:20,234 INFO L93 Difference]: Finished difference Result 483 states and 1427 transitions. [2021-06-12 19:56:20,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:56:20,235 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:20,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:20,236 INFO L225 Difference]: With dead ends: 483 [2021-06-12 19:56:20,236 INFO L226 Difference]: Without dead ends: 468 [2021-06-12 19:56:20,236 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 458.3ms TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:56:20,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-06-12 19:56:20,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 318. [2021-06-12 19:56:20,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.993690851735016) internal successors, (949), 317 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:20,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 949 transitions. [2021-06-12 19:56:20,242 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 949 transitions. Word has length 20 [2021-06-12 19:56:20,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:20,242 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 949 transitions. [2021-06-12 19:56:20,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:20,242 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 949 transitions. [2021-06-12 19:56:20,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:20,243 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:20,243 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:20,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:20,457 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:20,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:20,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1539141422, now seen corresponding path program 60 times [2021-06-12 19:56:20,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:20,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661544440] [2021-06-12 19:56:20,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:20,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:20,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661544440] [2021-06-12 19:56:20,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661544440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:20,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846974059] [2021-06-12 19:56:20,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:20,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:56:20,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:20,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:20,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:20,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:20,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:20,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:20,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:20,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:56:20,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:20,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:20,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:20,670 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:20,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:20,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:12 [2021-06-12 19:56:20,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:20,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846974059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:20,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:20,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:56:20,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536738724] [2021-06-12 19:56:20,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:56:20,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:20,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:56:20,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:56:20,685 INFO L87 Difference]: Start difference. First operand 318 states and 949 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:20,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:20,851 INFO L93 Difference]: Finished difference Result 418 states and 1230 transitions. [2021-06-12 19:56:20,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:20,851 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:20,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:20,852 INFO L225 Difference]: With dead ends: 418 [2021-06-12 19:56:20,852 INFO L226 Difference]: Without dead ends: 403 [2021-06-12 19:56:20,852 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 122.6ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:56:20,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-12 19:56:20,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 315. [2021-06-12 19:56:20,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.9872611464968153) internal successors, (938), 314 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:20,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 938 transitions. [2021-06-12 19:56:20,856 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 938 transitions. Word has length 20 [2021-06-12 19:56:20,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:20,856 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 938 transitions. [2021-06-12 19:56:20,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:20,856 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 938 transitions. [2021-06-12 19:56:20,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:20,856 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:20,857 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:21,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-12 19:56:21,057 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:21,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:21,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1251523996, now seen corresponding path program 61 times [2021-06-12 19:56:21,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:21,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380283054] [2021-06-12 19:56:21,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:21,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:21,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:21,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:21,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380283054] [2021-06-12 19:56:21,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380283054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:21,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103071224] [2021-06-12 19:56:21,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:21,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:21,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:21,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:21,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:21,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:21,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:21,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:21,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:56:21,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:21,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:21,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:21,238 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:21,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:21,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:15 [2021-06-12 19:56:21,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:21,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103071224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:21,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:21,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 19:56:21,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142595619] [2021-06-12 19:56:21,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:56:21,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:21,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:56:21,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:56:21,257 INFO L87 Difference]: Start difference. First operand 315 states and 938 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:21,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:21,399 INFO L93 Difference]: Finished difference Result 428 states and 1259 transitions. [2021-06-12 19:56:21,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:21,399 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:21,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:21,400 INFO L225 Difference]: With dead ends: 428 [2021-06-12 19:56:21,400 INFO L226 Difference]: Without dead ends: 413 [2021-06-12 19:56:21,400 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:56:21,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-06-12 19:56:21,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 314. [2021-06-12 19:56:21,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.9808306709265175) internal successors, (933), 313 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:21,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 933 transitions. [2021-06-12 19:56:21,404 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 933 transitions. Word has length 20 [2021-06-12 19:56:21,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:21,404 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 933 transitions. [2021-06-12 19:56:21,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:21,404 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 933 transitions. [2021-06-12 19:56:21,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:21,404 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:21,404 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:21,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-12 19:56:21,605 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:21,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:21,605 INFO L82 PathProgramCache]: Analyzing trace with hash -2137563706, now seen corresponding path program 62 times [2021-06-12 19:56:21,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:21,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133890147] [2021-06-12 19:56:21,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:21,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:21,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:21,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:21,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133890147] [2021-06-12 19:56:21,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133890147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:21,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759575995] [2021-06-12 19:56:21,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:21,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:21,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:21,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:21,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:21,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:21,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:21,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:21,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:21,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-06-12 19:56:21,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:56:21,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:21,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:21,855 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:21,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:21,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:12 [2021-06-12 19:56:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:21,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759575995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:21,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:21,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:56:21,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356825047] [2021-06-12 19:56:21,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:56:21,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:21,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:56:21,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:56:21,872 INFO L87 Difference]: Start difference. First operand 314 states and 933 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:22,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:22,033 INFO L93 Difference]: Finished difference Result 407 states and 1202 transitions. [2021-06-12 19:56:22,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:22,034 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:22,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:22,035 INFO L225 Difference]: With dead ends: 407 [2021-06-12 19:56:22,035 INFO L226 Difference]: Without dead ends: 392 [2021-06-12 19:56:22,035 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 148.7ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:56:22,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-12 19:56:22,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 311. [2021-06-12 19:56:22,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.9838709677419355) internal successors, (925), 310 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:22,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 925 transitions. [2021-06-12 19:56:22,039 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 925 transitions. Word has length 20 [2021-06-12 19:56:22,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:22,039 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 925 transitions. [2021-06-12 19:56:22,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:22,039 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 925 transitions. [2021-06-12 19:56:22,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:22,039 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:22,039 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:22,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-12 19:56:22,240 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:22,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:22,240 INFO L82 PathProgramCache]: Analyzing trace with hash 438418908, now seen corresponding path program 63 times [2021-06-12 19:56:22,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:22,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222887517] [2021-06-12 19:56:22,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:22,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:22,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:22,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222887517] [2021-06-12 19:56:22,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222887517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:22,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481202716] [2021-06-12 19:56:22,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:22,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:56:22,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:22,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:22,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:22,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:22,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:22,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-06-12 19:56:22,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:56:22,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:22,459 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:22,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:15 [2021-06-12 19:56:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:22,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481202716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:22,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:22,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 19:56:22,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331401039] [2021-06-12 19:56:22,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:56:22,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:22,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:56:22,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:56:22,481 INFO L87 Difference]: Start difference. First operand 311 states and 925 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:22,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:22,613 INFO L93 Difference]: Finished difference Result 433 states and 1270 transitions. [2021-06-12 19:56:22,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:22,613 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:22,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:22,614 INFO L225 Difference]: With dead ends: 433 [2021-06-12 19:56:22,614 INFO L226 Difference]: Without dead ends: 418 [2021-06-12 19:56:22,614 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:56:22,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-12 19:56:22,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 310. [2021-06-12 19:56:22,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9805825242718447) internal successors, (921), 309 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:22,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 921 transitions. [2021-06-12 19:56:22,618 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 921 transitions. Word has length 20 [2021-06-12 19:56:22,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:22,618 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 921 transitions. [2021-06-12 19:56:22,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:22,618 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 921 transitions. [2021-06-12 19:56:22,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:22,619 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:22,619 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:22,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:22,819 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:22,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:22,820 INFO L82 PathProgramCache]: Analyzing trace with hash -460350802, now seen corresponding path program 64 times [2021-06-12 19:56:22,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:22,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70632599] [2021-06-12 19:56:22,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:22,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:22,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:22,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70632599] [2021-06-12 19:56:22,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70632599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:22,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699709007] [2021-06-12 19:56:22,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:22,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:22,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:22,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:22,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:22,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:22,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:22,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-06-12 19:56:22,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:56:22,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:22,991 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:22,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:12 [2021-06-12 19:56:23,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:23,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699709007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:23,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:23,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:56:23,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806620435] [2021-06-12 19:56:23,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:56:23,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:23,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:56:23,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:56:23,007 INFO L87 Difference]: Start difference. First operand 310 states and 921 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:23,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:23,163 INFO L93 Difference]: Finished difference Result 511 states and 1507 transitions. [2021-06-12 19:56:23,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:23,163 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:23,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:23,164 INFO L225 Difference]: With dead ends: 511 [2021-06-12 19:56:23,165 INFO L226 Difference]: Without dead ends: 496 [2021-06-12 19:56:23,165 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:56:23,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-12 19:56:23,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 305. [2021-06-12 19:56:23,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.986842105263158) internal successors, (908), 304 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:23,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 908 transitions. [2021-06-12 19:56:23,171 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 908 transitions. Word has length 20 [2021-06-12 19:56:23,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:23,171 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 908 transitions. [2021-06-12 19:56:23,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:23,171 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 908 transitions. [2021-06-12 19:56:23,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:23,171 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:23,172 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:23,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:23,393 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:23,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:23,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1074885762, now seen corresponding path program 65 times [2021-06-12 19:56:23,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:23,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539753100] [2021-06-12 19:56:23,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:23,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:23,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539753100] [2021-06-12 19:56:23,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539753100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:23,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866608180] [2021-06-12 19:56:23,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:23,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:56:23,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:23,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:56:23,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:23,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:23,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:23,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:23,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:23,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-06-12 19:56:23,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:56:23,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:23,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:56:23,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:23,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:23,618 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:23,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:56:23,619 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:41 [2021-06-12 19:56:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:23,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866608180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:23,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:23,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:56:23,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311829408] [2021-06-12 19:56:23,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:56:23,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:23,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:56:23,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:56:23,755 INFO L87 Difference]: Start difference. First operand 305 states and 908 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:24,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:24,240 INFO L93 Difference]: Finished difference Result 621 states and 1830 transitions. [2021-06-12 19:56:24,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:56:24,240 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:24,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:24,241 INFO L225 Difference]: With dead ends: 621 [2021-06-12 19:56:24,241 INFO L226 Difference]: Without dead ends: 606 [2021-06-12 19:56:24,241 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 406.4ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:56:24,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-06-12 19:56:24,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 303. [2021-06-12 19:56:24,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.980132450331126) internal successors, (900), 302 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:24,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 900 transitions. [2021-06-12 19:56:24,246 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 900 transitions. Word has length 20 [2021-06-12 19:56:24,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:24,246 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 900 transitions. [2021-06-12 19:56:24,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:24,246 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 900 transitions. [2021-06-12 19:56:24,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:24,247 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:24,247 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:24,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-06-12 19:56:24,447 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:24,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:24,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1297313230, now seen corresponding path program 66 times [2021-06-12 19:56:24,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:24,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212817441] [2021-06-12 19:56:24,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:24,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:24,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212817441] [2021-06-12 19:56:24,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212817441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:24,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301157360] [2021-06-12 19:56:24,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:24,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:56:24,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:24,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:24,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:24,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:24,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:24,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:24,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:24,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:56:24,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:24,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:24,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:24,648 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 19:56:24,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:24,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:12 [2021-06-12 19:56:24,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:24,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301157360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:24,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:24,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:56:24,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838197857] [2021-06-12 19:56:24,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:56:24,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:24,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:56:24,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:56:24,674 INFO L87 Difference]: Start difference. First operand 303 states and 900 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:24,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:24,829 INFO L93 Difference]: Finished difference Result 381 states and 1125 transitions. [2021-06-12 19:56:24,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:24,829 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:24,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:24,830 INFO L225 Difference]: With dead ends: 381 [2021-06-12 19:56:24,830 INFO L226 Difference]: Without dead ends: 366 [2021-06-12 19:56:24,830 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:56:24,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-12 19:56:24,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 315. [2021-06-12 19:56:24,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.9904458598726116) internal successors, (939), 314 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:24,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 939 transitions. [2021-06-12 19:56:24,835 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 939 transitions. Word has length 20 [2021-06-12 19:56:24,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:24,835 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 939 transitions. [2021-06-12 19:56:24,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:24,835 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 939 transitions. [2021-06-12 19:56:24,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:24,836 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:24,836 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:25,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:25,052 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:25,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:25,052 INFO L82 PathProgramCache]: Analyzing trace with hash -32614932, now seen corresponding path program 67 times [2021-06-12 19:56:25,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:25,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432046869] [2021-06-12 19:56:25,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:25,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:25,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:25,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432046869] [2021-06-12 19:56:25,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432046869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:25,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257804986] [2021-06-12 19:56:25,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:25,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:25,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:25,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:25,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:25,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:25,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:25,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:56:25,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:25,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:25,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:25,263 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 19:56:25,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:25,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:15 [2021-06-12 19:56:25,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:25,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257804986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:25,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:25,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:56:25,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752110563] [2021-06-12 19:56:25,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:25,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:25,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:25,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:25,331 INFO L87 Difference]: Start difference. First operand 315 states and 939 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:25,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:25,667 INFO L93 Difference]: Finished difference Result 461 states and 1356 transitions. [2021-06-12 19:56:25,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:56:25,667 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:25,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:25,668 INFO L225 Difference]: With dead ends: 461 [2021-06-12 19:56:25,668 INFO L226 Difference]: Without dead ends: 446 [2021-06-12 19:56:25,668 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 274.2ms TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:25,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-12 19:56:25,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 312. [2021-06-12 19:56:25,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9807073954983925) internal successors, (927), 311 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:25,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 927 transitions. [2021-06-12 19:56:25,672 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 927 transitions. Word has length 20 [2021-06-12 19:56:25,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:25,672 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 927 transitions. [2021-06-12 19:56:25,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:25,672 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 927 transitions. [2021-06-12 19:56:25,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:25,672 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:25,672 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:25,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:25,873 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:25,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:25,873 INFO L82 PathProgramCache]: Analyzing trace with hash -947696420, now seen corresponding path program 68 times [2021-06-12 19:56:25,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:25,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206640510] [2021-06-12 19:56:25,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:25,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:25,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:25,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:25,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206640510] [2021-06-12 19:56:25,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206640510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:25,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307915800] [2021-06-12 19:56:25,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:26,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:26,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:26,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:26,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:26,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:26,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:26,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:26,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:26,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-06-12 19:56:26,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:56:26,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:26,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:26,085 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:26,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:26,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:15 [2021-06-12 19:56:26,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:26,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307915800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:26,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:26,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:56:26,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800874585] [2021-06-12 19:56:26,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:26,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:26,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:26,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:26,158 INFO L87 Difference]: Start difference. First operand 312 states and 927 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:26,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:26,402 INFO L93 Difference]: Finished difference Result 436 states and 1287 transitions. [2021-06-12 19:56:26,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:56:26,402 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:26,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:26,403 INFO L225 Difference]: With dead ends: 436 [2021-06-12 19:56:26,403 INFO L226 Difference]: Without dead ends: 421 [2021-06-12 19:56:26,403 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 228.4ms TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:56:26,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-06-12 19:56:26,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 309. [2021-06-12 19:56:26,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9805194805194803) internal successors, (918), 308 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:26,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 918 transitions. [2021-06-12 19:56:26,428 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 918 transitions. Word has length 20 [2021-06-12 19:56:26,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:26,428 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 918 transitions. [2021-06-12 19:56:26,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:26,429 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 918 transitions. [2021-06-12 19:56:26,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:26,429 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:26,429 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:26,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-12 19:56:26,652 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:26,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:26,653 INFO L82 PathProgramCache]: Analyzing trace with hash 537392906, now seen corresponding path program 69 times [2021-06-12 19:56:26,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:26,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414133070] [2021-06-12 19:56:26,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:26,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:26,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:26,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414133070] [2021-06-12 19:56:26,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414133070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:26,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941931055] [2021-06-12 19:56:26,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:26,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:56:26,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:26,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:26,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:26,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:26,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:26,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:26,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:26,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-06-12 19:56:26,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:56:26,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:26,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:26,853 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:26,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:26,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:15 [2021-06-12 19:56:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:26,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941931055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:26,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:26,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:56:26,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036342662] [2021-06-12 19:56:26,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:56:26,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:26,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:56:26,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:56:26,915 INFO L87 Difference]: Start difference. First operand 309 states and 918 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:27,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:27,269 INFO L93 Difference]: Finished difference Result 544 states and 1604 transitions. [2021-06-12 19:56:27,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:56:27,269 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:27,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:27,271 INFO L225 Difference]: With dead ends: 544 [2021-06-12 19:56:27,271 INFO L226 Difference]: Without dead ends: 529 [2021-06-12 19:56:27,271 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 250.0ms TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:27,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-12 19:56:27,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 309. [2021-06-12 19:56:27,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9805194805194803) internal successors, (918), 308 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:27,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 918 transitions. [2021-06-12 19:56:27,277 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 918 transitions. Word has length 20 [2021-06-12 19:56:27,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:27,277 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 918 transitions. [2021-06-12 19:56:27,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:27,277 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 918 transitions. [2021-06-12 19:56:27,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:27,278 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:27,278 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:27,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-12 19:56:27,491 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:27,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:27,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1424757384, now seen corresponding path program 70 times [2021-06-12 19:56:27,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:27,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360413457] [2021-06-12 19:56:27,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:27,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:27,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360413457] [2021-06-12 19:56:27,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360413457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:27,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728893998] [2021-06-12 19:56:27,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:27,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:27,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:27,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:27,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:27,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:27,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:27,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:27,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:27,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:15 [2021-06-12 19:56:27,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:27,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:27,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:27,713 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:27,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:27,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:9 [2021-06-12 19:56:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:27,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728893998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:27,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:27,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:56:27,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826180097] [2021-06-12 19:56:27,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:56:27,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:27,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:56:27,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:27,745 INFO L87 Difference]: Start difference. First operand 309 states and 918 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:28,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:28,279 INFO L93 Difference]: Finished difference Result 690 states and 2025 transitions. [2021-06-12 19:56:28,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:56:28,279 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:28,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:28,280 INFO L225 Difference]: With dead ends: 690 [2021-06-12 19:56:28,280 INFO L226 Difference]: Without dead ends: 675 [2021-06-12 19:56:28,280 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 438.8ms TimeCoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:56:28,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-06-12 19:56:28,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 315. [2021-06-12 19:56:28,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.9808917197452227) internal successors, (936), 314 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:28,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 936 transitions. [2021-06-12 19:56:28,285 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 936 transitions. Word has length 20 [2021-06-12 19:56:28,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:28,285 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 936 transitions. [2021-06-12 19:56:28,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:28,285 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 936 transitions. [2021-06-12 19:56:28,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:28,286 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:28,286 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:28,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-12 19:56:28,486 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:28,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:28,486 INFO L82 PathProgramCache]: Analyzing trace with hash -517942808, now seen corresponding path program 71 times [2021-06-12 19:56:28,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:28,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785370316] [2021-06-12 19:56:28,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:28,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:28,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:28,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785370316] [2021-06-12 19:56:28,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785370316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:28,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845515208] [2021-06-12 19:56:28,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:28,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:28,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:28,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:28,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:28,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:28,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:28,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:28,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:28,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 19:56:28,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:28,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:28,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:28,722 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:28,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:28,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:9 [2021-06-12 19:56:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:28,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845515208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:28,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:28,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:56:28,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660358948] [2021-06-12 19:56:28,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:56:28,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:28,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:56:28,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:28,750 INFO L87 Difference]: Start difference. First operand 315 states and 936 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:29,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:29,138 INFO L93 Difference]: Finished difference Result 576 states and 1695 transitions. [2021-06-12 19:56:29,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:56:29,138 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:29,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:29,139 INFO L225 Difference]: With dead ends: 576 [2021-06-12 19:56:29,139 INFO L226 Difference]: Without dead ends: 561 [2021-06-12 19:56:29,139 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 313.6ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:56:29,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-06-12 19:56:29,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 321. [2021-06-12 19:56:29,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.990625) internal successors, (957), 320 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:29,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 957 transitions. [2021-06-12 19:56:29,144 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 957 transitions. Word has length 20 [2021-06-12 19:56:29,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:29,144 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 957 transitions. [2021-06-12 19:56:29,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:29,144 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 957 transitions. [2021-06-12 19:56:29,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:29,145 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:29,145 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:29,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:29,345 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:29,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:29,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1019734144, now seen corresponding path program 72 times [2021-06-12 19:56:29,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:29,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454694779] [2021-06-12 19:56:29,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:29,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:29,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:29,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454694779] [2021-06-12 19:56:29,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454694779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:29,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981900361] [2021-06-12 19:56:29,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:29,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:56:29,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:29,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:29,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:29,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:29,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:29,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:29,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:29,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 19:56:29,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:29,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:29,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:29,538 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:29,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:29,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:12 [2021-06-12 19:56:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:29,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981900361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:29,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:29,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:56:29,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433598231] [2021-06-12 19:56:29,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:56:29,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:29,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:56:29,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:29,582 INFO L87 Difference]: Start difference. First operand 321 states and 957 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:29,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:29,990 INFO L93 Difference]: Finished difference Result 570 states and 1672 transitions. [2021-06-12 19:56:29,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:56:29,990 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:29,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:29,991 INFO L225 Difference]: With dead ends: 570 [2021-06-12 19:56:29,991 INFO L226 Difference]: Without dead ends: 555 [2021-06-12 19:56:29,992 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 318.8ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:56:29,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-06-12 19:56:29,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 318. [2021-06-12 19:56:29,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.9810725552050474) internal successors, (945), 317 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:29,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 945 transitions. [2021-06-12 19:56:29,999 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 945 transitions. Word has length 20 [2021-06-12 19:56:29,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:29,999 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 945 transitions. [2021-06-12 19:56:29,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:29,999 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 945 transitions. [2021-06-12 19:56:30,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:30,000 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:30,000 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:30,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-12 19:56:30,222 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:30,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:30,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1168449032, now seen corresponding path program 73 times [2021-06-12 19:56:30,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:30,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899925075] [2021-06-12 19:56:30,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:30,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:30,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:30,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:30,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899925075] [2021-06-12 19:56:30,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899925075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:30,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443772840] [2021-06-12 19:56:30,327 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:30,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:30,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:30,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:30,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:30,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:30,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:30,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 19:56:30,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:30,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:30,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:30,441 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 19:56:30,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:30,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:12 [2021-06-12 19:56:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:30,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443772840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:30,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:30,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:56:30,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599449000] [2021-06-12 19:56:30,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:56:30,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:30,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:56:30,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:30,485 INFO L87 Difference]: Start difference. First operand 318 states and 945 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:30,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:30,859 INFO L93 Difference]: Finished difference Result 550 states and 1618 transitions. [2021-06-12 19:56:30,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:56:30,860 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:30,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:30,860 INFO L225 Difference]: With dead ends: 550 [2021-06-12 19:56:30,860 INFO L226 Difference]: Without dead ends: 535 [2021-06-12 19:56:30,861 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 312.0ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:56:30,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-12 19:56:30,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 312. [2021-06-12 19:56:30,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9807073954983925) internal successors, (927), 311 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:30,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 927 transitions. [2021-06-12 19:56:30,867 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 927 transitions. Word has length 20 [2021-06-12 19:56:30,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:30,867 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 927 transitions. [2021-06-12 19:56:30,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:30,867 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 927 transitions. [2021-06-12 19:56:30,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:30,868 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:30,868 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:31,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:31,090 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:31,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:31,091 INFO L82 PathProgramCache]: Analyzing trace with hash 2087081584, now seen corresponding path program 74 times [2021-06-12 19:56:31,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:31,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868742065] [2021-06-12 19:56:31,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:31,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:31,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:31,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868742065] [2021-06-12 19:56:31,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868742065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:31,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851258295] [2021-06-12 19:56:31,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:31,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:31,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:31,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:31,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:31,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:31,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:31,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:31,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:31,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 19:56:31,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:31,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:31,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:31,306 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:31,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:31,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:9 [2021-06-12 19:56:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:31,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851258295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:31,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:31,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:56:31,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622945759] [2021-06-12 19:56:31,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:56:31,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:31,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:56:31,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:31,334 INFO L87 Difference]: Start difference. First operand 312 states and 927 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:31,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:31,658 INFO L93 Difference]: Finished difference Result 578 states and 1702 transitions. [2021-06-12 19:56:31,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:56:31,658 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:31,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:31,659 INFO L225 Difference]: With dead ends: 578 [2021-06-12 19:56:31,659 INFO L226 Difference]: Without dead ends: 563 [2021-06-12 19:56:31,659 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 290.6ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:56:31,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-12 19:56:31,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 322. [2021-06-12 19:56:31,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.9906542056074765) internal successors, (960), 321 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:31,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 960 transitions. [2021-06-12 19:56:31,664 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 960 transitions. Word has length 20 [2021-06-12 19:56:31,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:31,664 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 960 transitions. [2021-06-12 19:56:31,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:31,665 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 960 transitions. [2021-06-12 19:56:31,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:31,665 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:31,665 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:31,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-12 19:56:31,866 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:31,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:31,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1585290248, now seen corresponding path program 75 times [2021-06-12 19:56:31,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:31,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281992098] [2021-06-12 19:56:31,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:31,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:31,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:31,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:31,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281992098] [2021-06-12 19:56:31,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281992098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:31,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341742877] [2021-06-12 19:56:31,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:31,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:56:31,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:31,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:31,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:32,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:32,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:32,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:32,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:32,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 19:56:32,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:32,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:32,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:32,047 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:32,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:32,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:12 [2021-06-12 19:56:32,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:32,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341742877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:32,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:32,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:56:32,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927522537] [2021-06-12 19:56:32,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:56:32,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:32,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:56:32,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:32,089 INFO L87 Difference]: Start difference. First operand 322 states and 960 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:32,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:32,460 INFO L93 Difference]: Finished difference Result 594 states and 1744 transitions. [2021-06-12 19:56:32,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:56:32,460 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:32,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:32,461 INFO L225 Difference]: With dead ends: 594 [2021-06-12 19:56:32,461 INFO L226 Difference]: Without dead ends: 579 [2021-06-12 19:56:32,461 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 291.8ms TimeCoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:56:32,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-12 19:56:32,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 319. [2021-06-12 19:56:32,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.981132075471698) internal successors, (948), 318 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:32,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 948 transitions. [2021-06-12 19:56:32,466 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 948 transitions. Word has length 20 [2021-06-12 19:56:32,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:32,466 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 948 transitions. [2021-06-12 19:56:32,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:32,467 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 948 transitions. [2021-06-12 19:56:32,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:32,467 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:32,467 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:32,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:32,668 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:32,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:32,668 INFO L82 PathProgramCache]: Analyzing trace with hash -521493872, now seen corresponding path program 76 times [2021-06-12 19:56:32,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:32,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030168212] [2021-06-12 19:56:32,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:32,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:32,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:32,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030168212] [2021-06-12 19:56:32,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030168212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:32,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160738902] [2021-06-12 19:56:32,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:32,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:32,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:32,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:32,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:32,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:32,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:32,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:32,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:32,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 19:56:32,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:32,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:32,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:32,853 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 19:56:32,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:32,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:12 [2021-06-12 19:56:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:32,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160738902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:32,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:32,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:56:32,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876256520] [2021-06-12 19:56:32,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:56:32,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:32,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:56:32,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:32,896 INFO L87 Difference]: Start difference. First operand 319 states and 948 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:33,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:33,253 INFO L93 Difference]: Finished difference Result 574 states and 1690 transitions. [2021-06-12 19:56:33,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:56:33,254 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:33,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:33,255 INFO L225 Difference]: With dead ends: 574 [2021-06-12 19:56:33,255 INFO L226 Difference]: Without dead ends: 559 [2021-06-12 19:56:33,255 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 290.2ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:56:33,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-12 19:56:33,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 316. [2021-06-12 19:56:33,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.980952380952381) internal successors, (939), 315 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:33,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 939 transitions. [2021-06-12 19:56:33,262 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 939 transitions. Word has length 20 [2021-06-12 19:56:33,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:33,262 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 939 transitions. [2021-06-12 19:56:33,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:33,262 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 939 transitions. [2021-06-12 19:56:33,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:33,263 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:33,263 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:33,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:33,477 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:33,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:33,477 INFO L82 PathProgramCache]: Analyzing trace with hash 518741926, now seen corresponding path program 77 times [2021-06-12 19:56:33,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:33,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268542200] [2021-06-12 19:56:33,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:33,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:33,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:33,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268542200] [2021-06-12 19:56:33,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268542200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:33,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146578386] [2021-06-12 19:56:33,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:33,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:56:33,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:33,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:33,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:33,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:33,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:33,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:33,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:33,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:15 [2021-06-12 19:56:33,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:33,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:33,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:33,713 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 19:56:33,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:33,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:12 [2021-06-12 19:56:33,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:33,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146578386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:33,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:33,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:56:33,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006166592] [2021-06-12 19:56:33,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:56:33,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:33,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:56:33,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:33,776 INFO L87 Difference]: Start difference. First operand 316 states and 939 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:34,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:34,311 INFO L93 Difference]: Finished difference Result 695 states and 2045 transitions. [2021-06-12 19:56:34,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:56:34,312 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:34,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:34,313 INFO L225 Difference]: With dead ends: 695 [2021-06-12 19:56:34,313 INFO L226 Difference]: Without dead ends: 680 [2021-06-12 19:56:34,313 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 401.0ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:56:34,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-06-12 19:56:34,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 325. [2021-06-12 19:56:34,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9814814814814814) internal successors, (966), 324 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:34,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 966 transitions. [2021-06-12 19:56:34,323 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 966 transitions. Word has length 20 [2021-06-12 19:56:34,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:34,323 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 966 transitions. [2021-06-12 19:56:34,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:34,324 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 966 transitions. [2021-06-12 19:56:34,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:34,324 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:34,324 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:34,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-06-12 19:56:34,537 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:34,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:34,537 INFO L82 PathProgramCache]: Analyzing trace with hash 409447658, now seen corresponding path program 78 times [2021-06-12 19:56:34,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:34,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093106740] [2021-06-12 19:56:34,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:34,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:34,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:34,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093106740] [2021-06-12 19:56:34,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093106740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:34,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183318889] [2021-06-12 19:56:34,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:34,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:56:34,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:34,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:34,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:34,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:34,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:34,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:34,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:34,708 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 19:56:34,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:34,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:34,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:34,778 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:34,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:34,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:9 [2021-06-12 19:56:34,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:34,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183318889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:34,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:34,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:56:34,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835415881] [2021-06-12 19:56:34,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:34,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:34,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:34,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:34,813 INFO L87 Difference]: Start difference. First operand 325 states and 966 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:35,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:35,132 INFO L93 Difference]: Finished difference Result 580 states and 1705 transitions. [2021-06-12 19:56:35,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:56:35,133 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:35,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:35,134 INFO L225 Difference]: With dead ends: 580 [2021-06-12 19:56:35,134 INFO L226 Difference]: Without dead ends: 565 [2021-06-12 19:56:35,134 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 265.7ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:56:35,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-12 19:56:35,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 329. [2021-06-12 19:56:35,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:35,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-06-12 19:56:35,138 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 20 [2021-06-12 19:56:35,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:35,138 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-06-12 19:56:35,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:35,138 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-06-12 19:56:35,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:35,139 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:35,139 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:35,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-12 19:56:35,339 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:35,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:35,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1272688656, now seen corresponding path program 79 times [2021-06-12 19:56:35,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:35,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383828246] [2021-06-12 19:56:35,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:35,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:35,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:35,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383828246] [2021-06-12 19:56:35,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383828246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:35,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602463388] [2021-06-12 19:56:35,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:35,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:35,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:35,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:35,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:35,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:35,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:35,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:20 [2021-06-12 19:56:35,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:35,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:35,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:35,499 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:35,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:35,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:9 [2021-06-12 19:56:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:35,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602463388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:35,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:35,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:56:35,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787740861] [2021-06-12 19:56:35,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:56:35,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:35,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:56:35,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:56:35,508 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:35,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:35,633 INFO L93 Difference]: Finished difference Result 413 states and 1218 transitions. [2021-06-12 19:56:35,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:35,634 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:35,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:35,635 INFO L225 Difference]: With dead ends: 413 [2021-06-12 19:56:35,635 INFO L226 Difference]: Without dead ends: 398 [2021-06-12 19:56:35,635 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:56:35,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-06-12 19:56:35,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 336. [2021-06-12 19:56:35,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.988059701492537) internal successors, (1001), 335 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:35,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1001 transitions. [2021-06-12 19:56:35,640 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1001 transitions. Word has length 20 [2021-06-12 19:56:35,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:35,640 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1001 transitions. [2021-06-12 19:56:35,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:35,640 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1001 transitions. [2021-06-12 19:56:35,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:35,641 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:35,641 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:35,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:35,861 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:35,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:35,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1538106478, now seen corresponding path program 80 times [2021-06-12 19:56:35,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:35,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371271809] [2021-06-12 19:56:35,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:35,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:35,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:35,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371271809] [2021-06-12 19:56:35,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371271809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:35,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129521759] [2021-06-12 19:56:35,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:35,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:35,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:35,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:35,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:36,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:36,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:36,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:36,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:36,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:20 [2021-06-12 19:56:36,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:36,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:36,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:36,020 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:36,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:36,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:12 [2021-06-12 19:56:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:36,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129521759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:36,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:36,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:56:36,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848432459] [2021-06-12 19:56:36,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:56:36,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:36,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:56:36,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:56:36,038 INFO L87 Difference]: Start difference. First operand 336 states and 1001 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:36,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:36,172 INFO L93 Difference]: Finished difference Result 419 states and 1231 transitions. [2021-06-12 19:56:36,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:36,173 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:36,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:36,174 INFO L225 Difference]: With dead ends: 419 [2021-06-12 19:56:36,174 INFO L226 Difference]: Without dead ends: 404 [2021-06-12 19:56:36,174 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:56:36,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-12 19:56:36,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 333. [2021-06-12 19:56:36,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9819277108433737) internal successors, (990), 332 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:36,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 990 transitions. [2021-06-12 19:56:36,179 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 990 transitions. Word has length 20 [2021-06-12 19:56:36,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:36,179 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 990 transitions. [2021-06-12 19:56:36,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:36,179 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 990 transitions. [2021-06-12 19:56:36,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:36,180 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:36,180 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:36,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-12 19:56:36,380 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:36,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:36,381 INFO L82 PathProgramCache]: Analyzing trace with hash 608064282, now seen corresponding path program 81 times [2021-06-12 19:56:36,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:36,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161953994] [2021-06-12 19:56:36,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:36,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:36,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161953994] [2021-06-12 19:56:36,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161953994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:36,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758057924] [2021-06-12 19:56:36,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:36,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:56:36,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:36,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:36,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:36,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:36,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:36,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:36,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:36,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:19 [2021-06-12 19:56:36,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:56:36,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:36,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:36,567 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:36,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:36,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:12 [2021-06-12 19:56:36,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:36,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758057924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:36,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:36,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:56:36,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610209276] [2021-06-12 19:56:36,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:56:36,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:36,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:56:36,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:56:36,583 INFO L87 Difference]: Start difference. First operand 333 states and 990 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:36,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:36,701 INFO L93 Difference]: Finished difference Result 414 states and 1220 transitions. [2021-06-12 19:56:36,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:36,701 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:36,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:36,702 INFO L225 Difference]: With dead ends: 414 [2021-06-12 19:56:36,702 INFO L226 Difference]: Without dead ends: 399 [2021-06-12 19:56:36,702 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:56:36,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-12 19:56:36,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 330. [2021-06-12 19:56:36,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9969604863221884) internal successors, (986), 329 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:36,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 986 transitions. [2021-06-12 19:56:36,708 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 986 transitions. Word has length 20 [2021-06-12 19:56:36,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:36,708 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 986 transitions. [2021-06-12 19:56:36,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:36,708 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 986 transitions. [2021-06-12 19:56:36,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:36,709 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:36,709 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:36,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-12 19:56:36,925 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:36,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:36,925 INFO L82 PathProgramCache]: Analyzing trace with hash -18031684, now seen corresponding path program 82 times [2021-06-12 19:56:36,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:36,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518802800] [2021-06-12 19:56:36,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:37,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:37,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:37,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518802800] [2021-06-12 19:56:37,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518802800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:37,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868805150] [2021-06-12 19:56:37,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:37,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:37,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:37,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:37,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:37,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:37,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:37,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:37,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:37,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:56:37,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:37,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:37,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:37,148 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:37,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:37,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:9 [2021-06-12 19:56:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:37,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868805150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:37,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:37,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:56:37,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073522935] [2021-06-12 19:56:37,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:56:37,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:37,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:56:37,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:56:37,158 INFO L87 Difference]: Start difference. First operand 330 states and 986 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:37,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:37,284 INFO L93 Difference]: Finished difference Result 451 states and 1322 transitions. [2021-06-12 19:56:37,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:37,284 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:37,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:37,285 INFO L225 Difference]: With dead ends: 451 [2021-06-12 19:56:37,285 INFO L226 Difference]: Without dead ends: 436 [2021-06-12 19:56:37,285 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 141.0ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:56:37,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-12 19:56:37,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 336. [2021-06-12 19:56:37,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.011940298507463) internal successors, (1009), 335 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:37,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1009 transitions. [2021-06-12 19:56:37,289 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1009 transitions. Word has length 20 [2021-06-12 19:56:37,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:37,289 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1009 transitions. [2021-06-12 19:56:37,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:37,289 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1009 transitions. [2021-06-12 19:56:37,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:37,290 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:37,290 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:37,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-12 19:56:37,490 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:37,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:37,490 INFO L82 PathProgramCache]: Analyzing trace with hash -519823020, now seen corresponding path program 83 times [2021-06-12 19:56:37,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:37,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738680552] [2021-06-12 19:56:37,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:37,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:37,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738680552] [2021-06-12 19:56:37,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738680552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:37,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303704857] [2021-06-12 19:56:37,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:37,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:56:37,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:37,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:56:37,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:37,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:37,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:37,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:37,685 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:37,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:37,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:56:37,703 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-06-12 19:56:37,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 19:56:37,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:37,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:37,777 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:37,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:37,793 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:37,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:56:37,794 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:33 [2021-06-12 19:56:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:37,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303704857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:37,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:37,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:56:37,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926200760] [2021-06-12 19:56:37,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:37,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:37,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:37,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:37,873 INFO L87 Difference]: Start difference. First operand 336 states and 1009 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:38,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:38,130 INFO L93 Difference]: Finished difference Result 501 states and 1479 transitions. [2021-06-12 19:56:38,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:56:38,130 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:38,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:38,131 INFO L225 Difference]: With dead ends: 501 [2021-06-12 19:56:38,131 INFO L226 Difference]: Without dead ends: 486 [2021-06-12 19:56:38,131 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 271.5ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:38,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-12 19:56:38,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 334. [2021-06-12 19:56:38,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.009009009009009) internal successors, (1002), 333 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:38,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1002 transitions. [2021-06-12 19:56:38,135 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1002 transitions. Word has length 20 [2021-06-12 19:56:38,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:38,135 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1002 transitions. [2021-06-12 19:56:38,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:38,135 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1002 transitions. [2021-06-12 19:56:38,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:38,136 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:38,136 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:38,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:38,336 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:38,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:38,336 INFO L82 PathProgramCache]: Analyzing trace with hash -2051668164, now seen corresponding path program 84 times [2021-06-12 19:56:38,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:38,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496552839] [2021-06-12 19:56:38,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:38,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:38,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:38,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496552839] [2021-06-12 19:56:38,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496552839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:38,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990932776] [2021-06-12 19:56:38,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:38,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:56:38,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:38,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:38,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:38,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:38,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:38,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:38,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:38,531 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:56:38,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:38,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:38,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:38,567 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:38,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:38,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:12 [2021-06-12 19:56:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:38,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990932776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:38,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:38,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:56:38,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741809424] [2021-06-12 19:56:38,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:38,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:38,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:38,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:38,612 INFO L87 Difference]: Start difference. First operand 334 states and 1002 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:38,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:38,809 INFO L93 Difference]: Finished difference Result 503 states and 1480 transitions. [2021-06-12 19:56:38,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:38,809 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:38,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:38,810 INFO L225 Difference]: With dead ends: 503 [2021-06-12 19:56:38,810 INFO L226 Difference]: Without dead ends: 488 [2021-06-12 19:56:38,810 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 183.4ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:38,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-12 19:56:38,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 331. [2021-06-12 19:56:38,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 3.003030303030303) internal successors, (991), 330 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:38,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 991 transitions. [2021-06-12 19:56:38,814 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 991 transitions. Word has length 20 [2021-06-12 19:56:38,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:38,814 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 991 transitions. [2021-06-12 19:56:38,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:38,814 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 991 transitions. [2021-06-12 19:56:38,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:38,815 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:38,815 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:39,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-12 19:56:39,015 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:39,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:39,016 INFO L82 PathProgramCache]: Analyzing trace with hash -547366286, now seen corresponding path program 85 times [2021-06-12 19:56:39,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:39,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423099157] [2021-06-12 19:56:39,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:39,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:39,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:39,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:39,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423099157] [2021-06-12 19:56:39,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423099157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:39,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193313248] [2021-06-12 19:56:39,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:39,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:39,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:39,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:39,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:39,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:39,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:39,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:56:39,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:39,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:39,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:39,217 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:39,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:39,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:15 [2021-06-12 19:56:39,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:39,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193313248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:39,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:39,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 19:56:39,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857462680] [2021-06-12 19:56:39,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:56:39,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:39,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:56:39,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:56:39,239 INFO L87 Difference]: Start difference. First operand 331 states and 991 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:39,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:39,385 INFO L93 Difference]: Finished difference Result 448 states and 1315 transitions. [2021-06-12 19:56:39,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:39,385 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:39,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:39,386 INFO L225 Difference]: With dead ends: 448 [2021-06-12 19:56:39,386 INFO L226 Difference]: Without dead ends: 433 [2021-06-12 19:56:39,386 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:56:39,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-12 19:56:39,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 330. [2021-06-12 19:56:39,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9969604863221884) internal successors, (986), 329 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:39,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 986 transitions. [2021-06-12 19:56:39,389 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 986 transitions. Word has length 20 [2021-06-12 19:56:39,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:39,390 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 986 transitions. [2021-06-12 19:56:39,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:39,390 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 986 transitions. [2021-06-12 19:56:39,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:39,390 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:39,390 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:39,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:39,591 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:39,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:39,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1142576618, now seen corresponding path program 86 times [2021-06-12 19:56:39,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:39,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555562928] [2021-06-12 19:56:39,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:39,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:39,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:39,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555562928] [2021-06-12 19:56:39,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555562928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:39,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774142834] [2021-06-12 19:56:39,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:39,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:39,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:39,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:39,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:39,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:39,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:39,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:39,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:39,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-06-12 19:56:39,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:56:39,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:39,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:39,831 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:39,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:39,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:15 [2021-06-12 19:56:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:39,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774142834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:39,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:39,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:56:39,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555743727] [2021-06-12 19:56:39,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:39,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:39,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:39,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:39,910 INFO L87 Difference]: Start difference. First operand 330 states and 986 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:40,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:40,125 INFO L93 Difference]: Finished difference Result 482 states and 1416 transitions. [2021-06-12 19:56:40,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:40,126 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:40,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:40,126 INFO L225 Difference]: With dead ends: 482 [2021-06-12 19:56:40,127 INFO L226 Difference]: Without dead ends: 467 [2021-06-12 19:56:40,127 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 228.8ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:40,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-06-12 19:56:40,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 325. [2021-06-12 19:56:40,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9814814814814814) internal successors, (966), 324 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:40,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 966 transitions. [2021-06-12 19:56:40,132 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 966 transitions. Word has length 20 [2021-06-12 19:56:40,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:40,132 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 966 transitions. [2021-06-12 19:56:40,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:40,132 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 966 transitions. [2021-06-12 19:56:40,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:40,133 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:40,133 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:40,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-06-12 19:56:40,353 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:40,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:40,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1692812560, now seen corresponding path program 87 times [2021-06-12 19:56:40,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:40,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217071093] [2021-06-12 19:56:40,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:40,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:40,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:40,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217071093] [2021-06-12 19:56:40,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217071093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:40,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228718047] [2021-06-12 19:56:40,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:40,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:56:40,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:40,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:40,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:40,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:40,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:40,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:40,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:40,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:40,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:34 [2021-06-12 19:56:40,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:40,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:40,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:40,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:40,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:40,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:40,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:40,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:40,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:40,743 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:9 [2021-06-12 19:56:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:40,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228718047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:40,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:40,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:40,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434697541] [2021-06-12 19:56:40,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:40,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:40,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:40,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:40,776 INFO L87 Difference]: Start difference. First operand 325 states and 966 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:41,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:41,082 INFO L93 Difference]: Finished difference Result 444 states and 1310 transitions. [2021-06-12 19:56:41,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:41,082 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:41,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:41,083 INFO L225 Difference]: With dead ends: 444 [2021-06-12 19:56:41,083 INFO L226 Difference]: Without dead ends: 429 [2021-06-12 19:56:41,083 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 246.1ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:41,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-06-12 19:56:41,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 331. [2021-06-12 19:56:41,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.984848484848485) internal successors, (985), 330 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:41,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 985 transitions. [2021-06-12 19:56:41,087 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 985 transitions. Word has length 20 [2021-06-12 19:56:41,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:41,087 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 985 transitions. [2021-06-12 19:56:41,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:41,087 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 985 transitions. [2021-06-12 19:56:41,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:41,088 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:41,088 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:41,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-06-12 19:56:41,288 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:41,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:41,288 INFO L82 PathProgramCache]: Analyzing trace with hash 2100363400, now seen corresponding path program 88 times [2021-06-12 19:56:41,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:41,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727220434] [2021-06-12 19:56:41,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:41,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:41,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:41,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727220434] [2021-06-12 19:56:41,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727220434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:41,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566592602] [2021-06-12 19:56:41,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:41,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:41,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:41,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:41,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:41,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:41,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:41,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:41,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:34 [2021-06-12 19:56:41,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:41,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:41,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:41,594 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:41,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,602 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:12 [2021-06-12 19:56:41,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:41,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566592602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:41,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:41,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:41,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889253857] [2021-06-12 19:56:41,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:41,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:41,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:41,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:41,651 INFO L87 Difference]: Start difference. First operand 331 states and 985 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:41,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:41,849 INFO L93 Difference]: Finished difference Result 450 states and 1323 transitions. [2021-06-12 19:56:41,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:41,850 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:41,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:41,850 INFO L225 Difference]: With dead ends: 450 [2021-06-12 19:56:41,850 INFO L226 Difference]: Without dead ends: 435 [2021-06-12 19:56:41,850 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 208.8ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:41,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-12 19:56:41,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 329. [2021-06-12 19:56:41,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:41,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-06-12 19:56:41,855 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 20 [2021-06-12 19:56:41,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:41,855 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-06-12 19:56:41,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:41,855 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-06-12 19:56:41,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:41,856 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:41,856 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:42,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:42,061 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:42,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:42,061 INFO L82 PathProgramCache]: Analyzing trace with hash -6420720, now seen corresponding path program 89 times [2021-06-12 19:56:42,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:42,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295961911] [2021-06-12 19:56:42,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:42,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:42,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295961911] [2021-06-12 19:56:42,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295961911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:42,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664712739] [2021-06-12 19:56:42,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:42,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:56:42,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:42,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:42,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:42,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:42,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:42,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:42,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:42,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:42,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 19:56:42,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:42,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:42,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:42,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:42,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:42,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:42,344 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:42,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:42,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:42,353 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:12 [2021-06-12 19:56:42,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:42,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664712739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:42,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:42,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:42,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427616654] [2021-06-12 19:56:42,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:42,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:42,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:42,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:42,402 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:42,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:42,674 INFO L93 Difference]: Finished difference Result 441 states and 1301 transitions. [2021-06-12 19:56:42,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:42,674 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:42,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:42,675 INFO L225 Difference]: With dead ends: 441 [2021-06-12 19:56:42,675 INFO L226 Difference]: Without dead ends: 426 [2021-06-12 19:56:42,675 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 199.3ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:42,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-06-12 19:56:42,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 327. [2021-06-12 19:56:42,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9846625766871164) internal successors, (973), 326 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:42,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 973 transitions. [2021-06-12 19:56:42,679 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 973 transitions. Word has length 20 [2021-06-12 19:56:42,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:42,679 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 973 transitions. [2021-06-12 19:56:42,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:42,679 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 973 transitions. [2021-06-12 19:56:42,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:42,679 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:42,679 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:42,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:42,880 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:42,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:42,880 INFO L82 PathProgramCache]: Analyzing trace with hash 29087378, now seen corresponding path program 90 times [2021-06-12 19:56:42,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:42,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932167961] [2021-06-12 19:56:42,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:42,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:42,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:42,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932167961] [2021-06-12 19:56:42,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932167961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:42,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553801895] [2021-06-12 19:56:42,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:43,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:56:43,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:43,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:43,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:43,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:43,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:43,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:43,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:43,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:43,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:39 [2021-06-12 19:56:43,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:43,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:43,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:43,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:43,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:43,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:43,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:43,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:43,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:43,236 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:9 [2021-06-12 19:56:43,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:43,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553801895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:43,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:43,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:56:43,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474907347] [2021-06-12 19:56:43,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:56:43,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:43,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:56:43,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:56:43,252 INFO L87 Difference]: Start difference. First operand 327 states and 973 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:43,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:43,439 INFO L93 Difference]: Finished difference Result 412 states and 1206 transitions. [2021-06-12 19:56:43,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:43,440 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:43,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:43,440 INFO L225 Difference]: With dead ends: 412 [2021-06-12 19:56:43,440 INFO L226 Difference]: Without dead ends: 397 [2021-06-12 19:56:43,440 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:56:43,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-12 19:56:43,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 333. [2021-06-12 19:56:43,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.0) internal successors, (996), 332 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:43,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 996 transitions. [2021-06-12 19:56:43,444 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 996 transitions. Word has length 20 [2021-06-12 19:56:43,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:43,444 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 996 transitions. [2021-06-12 19:56:43,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:43,444 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 996 transitions. [2021-06-12 19:56:43,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:43,444 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:43,445 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:43,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-12 19:56:43,645 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:43,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:43,645 INFO L82 PathProgramCache]: Analyzing trace with hash -472703958, now seen corresponding path program 91 times [2021-06-12 19:56:43,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:43,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059668938] [2021-06-12 19:56:43,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:43,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:43,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:43,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059668938] [2021-06-12 19:56:43,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059668938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:43,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29812704] [2021-06-12 19:56:43,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:43,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:43,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:43,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:43,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:43,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:43,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:43,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:43,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:43,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:39 [2021-06-12 19:56:43,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:43,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:43,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:43,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:43,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:43,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:43,937 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:43,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:43,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:43,946 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:12 [2021-06-12 19:56:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:43,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29812704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:43,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:43,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:56:43,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756925426] [2021-06-12 19:56:43,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:56:43,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:43,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:56:43,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:56:43,966 INFO L87 Difference]: Start difference. First operand 333 states and 996 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:44,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:44,130 INFO L93 Difference]: Finished difference Result 406 states and 1193 transitions. [2021-06-12 19:56:44,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:44,130 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:44,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:44,131 INFO L225 Difference]: With dead ends: 406 [2021-06-12 19:56:44,131 INFO L226 Difference]: Without dead ends: 391 [2021-06-12 19:56:44,131 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 155.6ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:56:44,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-12 19:56:44,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 331. [2021-06-12 19:56:44,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.996969696969697) internal successors, (989), 330 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:44,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 989 transitions. [2021-06-12 19:56:44,134 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 989 transitions. Word has length 20 [2021-06-12 19:56:44,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:44,134 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 989 transitions. [2021-06-12 19:56:44,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:44,135 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 989 transitions. [2021-06-12 19:56:44,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:44,135 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:44,135 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:44,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-12 19:56:44,337 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:44,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:44,337 INFO L82 PathProgramCache]: Analyzing trace with hash -2004549102, now seen corresponding path program 92 times [2021-06-12 19:56:44,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:44,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467419713] [2021-06-12 19:56:44,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:44,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:44,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:44,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467419713] [2021-06-12 19:56:44,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467419713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:44,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756416972] [2021-06-12 19:56:44,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:44,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:44,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:44,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:44,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:44,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:44,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:44,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:44,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:44,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:44,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:39 [2021-06-12 19:56:44,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:44,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:44,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:44,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:44,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:44,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:44,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:44,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:44,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:44,690 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:15 [2021-06-12 19:56:44,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:44,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756416972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:44,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:44,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:44,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167209680] [2021-06-12 19:56:44,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:44,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:44,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:44,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:44,733 INFO L87 Difference]: Start difference. First operand 331 states and 989 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:44,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:44,889 INFO L93 Difference]: Finished difference Result 456 states and 1340 transitions. [2021-06-12 19:56:44,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:44,890 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:44,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:44,890 INFO L225 Difference]: With dead ends: 456 [2021-06-12 19:56:44,890 INFO L226 Difference]: Without dead ends: 441 [2021-06-12 19:56:44,890 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 239.8ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:44,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-12 19:56:44,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 328. [2021-06-12 19:56:44,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9908256880733943) internal successors, (978), 327 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:44,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 978 transitions. [2021-06-12 19:56:44,894 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 978 transitions. Word has length 20 [2021-06-12 19:56:44,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:44,894 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 978 transitions. [2021-06-12 19:56:44,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:44,894 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 978 transitions. [2021-06-12 19:56:44,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:44,895 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:44,895 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:45,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:45,096 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:45,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:45,096 INFO L82 PathProgramCache]: Analyzing trace with hash -500247224, now seen corresponding path program 93 times [2021-06-12 19:56:45,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:45,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748955400] [2021-06-12 19:56:45,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:45,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:45,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748955400] [2021-06-12 19:56:45,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748955400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:45,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612804376] [2021-06-12 19:56:45,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:45,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:56:45,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:45,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:45,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:45,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:45,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:45,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:45,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:45,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:39 [2021-06-12 19:56:45,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:45,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:45,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:45,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:45,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:45,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:45,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:45,351 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:48, output treesize:18 [2021-06-12 19:56:45,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:45,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612804376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:45,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:45,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:56:45,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814676300] [2021-06-12 19:56:45,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:56:45,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:45,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:56:45,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:56:45,375 INFO L87 Difference]: Start difference. First operand 328 states and 978 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:45,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:45,554 INFO L93 Difference]: Finished difference Result 414 states and 1215 transitions. [2021-06-12 19:56:45,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:45,555 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:45,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:45,555 INFO L225 Difference]: With dead ends: 414 [2021-06-12 19:56:45,555 INFO L226 Difference]: Without dead ends: 399 [2021-06-12 19:56:45,555 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 146.8ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:56:45,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-12 19:56:45,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 327. [2021-06-12 19:56:45,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9846625766871164) internal successors, (973), 326 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:45,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 973 transitions. [2021-06-12 19:56:45,559 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 973 transitions. Word has length 20 [2021-06-12 19:56:45,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:45,559 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 973 transitions. [2021-06-12 19:56:45,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:45,559 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 973 transitions. [2021-06-12 19:56:45,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:45,560 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:45,560 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:45,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2021-06-12 19:56:45,760 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:45,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:45,761 INFO L82 PathProgramCache]: Analyzing trace with hash -860261966, now seen corresponding path program 94 times [2021-06-12 19:56:45,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:45,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288643617] [2021-06-12 19:56:45,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:45,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:45,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:45,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:45,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288643617] [2021-06-12 19:56:45,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288643617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:45,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684400108] [2021-06-12 19:56:45,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:45,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:45,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:45,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:45,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:45,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:45,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:45,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:45,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:45,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 19:56:46,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:46,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:46,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:46,069 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:46,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,082 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:12 [2021-06-12 19:56:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:46,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684400108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:46,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:46,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:46,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156154598] [2021-06-12 19:56:46,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:46,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:46,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:46,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:46,139 INFO L87 Difference]: Start difference. First operand 327 states and 973 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:46,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:46,377 INFO L93 Difference]: Finished difference Result 459 states and 1346 transitions. [2021-06-12 19:56:46,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:46,377 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:46,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:46,377 INFO L225 Difference]: With dead ends: 459 [2021-06-12 19:56:46,378 INFO L226 Difference]: Without dead ends: 444 [2021-06-12 19:56:46,378 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 240.6ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:46,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-12 19:56:46,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 330. [2021-06-12 19:56:46,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9939209726443767) internal successors, (985), 329 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:46,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 985 transitions. [2021-06-12 19:56:46,381 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 985 transitions. Word has length 20 [2021-06-12 19:56:46,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:46,382 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 985 transitions. [2021-06-12 19:56:46,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:46,382 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 985 transitions. [2021-06-12 19:56:46,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:46,382 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:46,382 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:46,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:46,583 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:46,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:46,583 INFO L82 PathProgramCache]: Analyzing trace with hash 2104777168, now seen corresponding path program 95 times [2021-06-12 19:56:46,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:46,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302581418] [2021-06-12 19:56:46,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:46,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:46,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:46,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302581418] [2021-06-12 19:56:46,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302581418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:46,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340576091] [2021-06-12 19:56:46,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:46,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:46,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:46,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:46,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:46,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:46,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:46,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:46,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 19:56:46,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:46,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:46,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:46,869 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:46,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,883 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:48, output treesize:15 [2021-06-12 19:56:46,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:46,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340576091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:46,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:46,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:46,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143466584] [2021-06-12 19:56:46,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:46,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:46,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:46,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:46,945 INFO L87 Difference]: Start difference. First operand 330 states and 985 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:47,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:47,100 INFO L93 Difference]: Finished difference Result 453 states and 1331 transitions. [2021-06-12 19:56:47,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:47,100 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:47,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:47,101 INFO L225 Difference]: With dead ends: 453 [2021-06-12 19:56:47,101 INFO L226 Difference]: Without dead ends: 438 [2021-06-12 19:56:47,101 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:47,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-12 19:56:47,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 326. [2021-06-12 19:56:47,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9815384615384617) internal successors, (969), 325 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:47,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 969 transitions. [2021-06-12 19:56:47,104 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 969 transitions. Word has length 20 [2021-06-12 19:56:47,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:47,105 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 969 transitions. [2021-06-12 19:56:47,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:47,105 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 969 transitions. [2021-06-12 19:56:47,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:47,105 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:47,105 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:47,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-12 19:56:47,306 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:47,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:47,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1726332322, now seen corresponding path program 96 times [2021-06-12 19:56:47,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:47,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480135750] [2021-06-12 19:56:47,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:47,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:47,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480135750] [2021-06-12 19:56:47,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480135750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:47,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570707638] [2021-06-12 19:56:47,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:47,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:56:47,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:47,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:47,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:47,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:47,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:47,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:47,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:47,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:47,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:39 [2021-06-12 19:56:47,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:47,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:47,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:47,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:47,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:47,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:47,755 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:47,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:47,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:47,764 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:9 [2021-06-12 19:56:47,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:47,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570707638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:47,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:47,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:47,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841113460] [2021-06-12 19:56:47,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:47,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:47,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:47,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:47,796 INFO L87 Difference]: Start difference. First operand 326 states and 969 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:47,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:47,949 INFO L93 Difference]: Finished difference Result 445 states and 1313 transitions. [2021-06-12 19:56:47,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:47,949 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:47,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:47,950 INFO L225 Difference]: With dead ends: 445 [2021-06-12 19:56:47,950 INFO L226 Difference]: Without dead ends: 430 [2021-06-12 19:56:47,950 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 272.7ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:47,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-12 19:56:47,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 336. [2021-06-12 19:56:47,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.997014925373134) internal successors, (1004), 335 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:47,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1004 transitions. [2021-06-12 19:56:47,954 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1004 transitions. Word has length 20 [2021-06-12 19:56:47,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:47,954 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1004 transitions. [2021-06-12 19:56:47,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:47,954 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1004 transitions. [2021-06-12 19:56:47,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:47,954 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:47,954 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:48,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-12 19:56:48,157 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:48,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:48,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1224540986, now seen corresponding path program 97 times [2021-06-12 19:56:48,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:48,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327620331] [2021-06-12 19:56:48,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:48,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:48,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327620331] [2021-06-12 19:56:48,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327620331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:48,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637543240] [2021-06-12 19:56:48,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:48,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:48,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:48,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:48,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:48,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:48,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:48,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:48,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:39 [2021-06-12 19:56:48,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:48,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:48,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:48,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:48,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:48,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:48,515 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:48,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:48,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:48,526 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:12 [2021-06-12 19:56:48,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:48,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637543240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:48,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:48,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:48,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152445368] [2021-06-12 19:56:48,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:48,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:48,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:48,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:48,584 INFO L87 Difference]: Start difference. First operand 336 states and 1004 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:48,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:48,786 INFO L93 Difference]: Finished difference Result 451 states and 1326 transitions. [2021-06-12 19:56:48,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:48,786 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:48,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:48,787 INFO L225 Difference]: With dead ends: 451 [2021-06-12 19:56:48,787 INFO L226 Difference]: Without dead ends: 436 [2021-06-12 19:56:48,787 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 246.5ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:48,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-12 19:56:48,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 334. [2021-06-12 19:56:48,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.993993993993994) internal successors, (997), 333 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:48,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 997 transitions. [2021-06-12 19:56:48,791 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 997 transitions. Word has length 20 [2021-06-12 19:56:48,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:48,791 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 997 transitions. [2021-06-12 19:56:48,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:48,791 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 997 transitions. [2021-06-12 19:56:48,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:48,791 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:48,791 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:48,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:48,992 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:48,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:48,992 INFO L82 PathProgramCache]: Analyzing trace with hash -307304158, now seen corresponding path program 98 times [2021-06-12 19:56:48,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:48,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189229428] [2021-06-12 19:56:48,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:49,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:49,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189229428] [2021-06-12 19:56:49,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189229428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:49,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602469140] [2021-06-12 19:56:49,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:49,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:49,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:49,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:49,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:49,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:49,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:49,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:49,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:49,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:36 [2021-06-12 19:56:49,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:49,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:49,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:49,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:49,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:49,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:49,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:49,365 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:12 [2021-06-12 19:56:49,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:49,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602469140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:49,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:49,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:56:49,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245353590] [2021-06-12 19:56:49,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:56:49,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:49,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:56:49,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:56:49,379 INFO L87 Difference]: Start difference. First operand 334 states and 997 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:49,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:49,533 INFO L93 Difference]: Finished difference Result 405 states and 1189 transitions. [2021-06-12 19:56:49,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:49,533 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:49,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:49,534 INFO L225 Difference]: With dead ends: 405 [2021-06-12 19:56:49,534 INFO L226 Difference]: Without dead ends: 390 [2021-06-12 19:56:49,534 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 175.3ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:56:49,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-12 19:56:49,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 331. [2021-06-12 19:56:49,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.987878787878788) internal successors, (986), 330 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:49,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 986 transitions. [2021-06-12 19:56:49,538 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 986 transitions. Word has length 20 [2021-06-12 19:56:49,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:49,538 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 986 transitions. [2021-06-12 19:56:49,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:49,538 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 986 transitions. [2021-06-12 19:56:49,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:49,538 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:49,538 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:49,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:49,741 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:49,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:49,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1196997720, now seen corresponding path program 99 times [2021-06-12 19:56:49,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:49,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317441741] [2021-06-12 19:56:49,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:49,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:49,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:49,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317441741] [2021-06-12 19:56:49,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317441741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:49,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980660730] [2021-06-12 19:56:49,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:49,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:56:49,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:49,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:49,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:49,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:49,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:50,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:50,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:50,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:39 [2021-06-12 19:56:50,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:50,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:50,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:50,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:50,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:50,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:50,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:50,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:50,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:50,094 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:48, output treesize:18 [2021-06-12 19:56:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:50,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980660730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:50,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:50,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:50,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306838284] [2021-06-12 19:56:50,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:50,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:50,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:50,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:50,175 INFO L87 Difference]: Start difference. First operand 331 states and 986 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:50,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:50,427 INFO L93 Difference]: Finished difference Result 467 states and 1372 transitions. [2021-06-12 19:56:50,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:50,427 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:50,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:50,428 INFO L225 Difference]: With dead ends: 467 [2021-06-12 19:56:50,428 INFO L226 Difference]: Without dead ends: 452 [2021-06-12 19:56:50,428 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 262.2ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:50,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-06-12 19:56:50,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 330. [2021-06-12 19:56:50,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9817629179331306) internal successors, (981), 329 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:50,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 981 transitions. [2021-06-12 19:56:50,432 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 981 transitions. Word has length 20 [2021-06-12 19:56:50,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:50,432 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 981 transitions. [2021-06-12 19:56:50,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:50,432 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 981 transitions. [2021-06-12 19:56:50,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:50,432 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:50,432 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:50,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2021-06-12 19:56:50,633 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:50,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:50,633 INFO L82 PathProgramCache]: Analyzing trace with hash 310958010, now seen corresponding path program 100 times [2021-06-12 19:56:50,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:50,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452362131] [2021-06-12 19:56:50,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:50,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:50,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:50,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452362131] [2021-06-12 19:56:50,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452362131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:50,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327584558] [2021-06-12 19:56:50,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:50,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:50,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:50,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:50,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:50,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:50,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:50,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:50,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:50,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:50,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:28 [2021-06-12 19:56:50,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:50,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:56:50,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:50,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:50,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:50,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:50,901 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:50,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:50,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:50,910 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:42, output treesize:12 [2021-06-12 19:56:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:50,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327584558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:50,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:50,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:56:50,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361612082] [2021-06-12 19:56:50,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:56:50,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:50,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:56:50,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:56:50,923 INFO L87 Difference]: Start difference. First operand 330 states and 981 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:51,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:51,045 INFO L93 Difference]: Finished difference Result 394 states and 1161 transitions. [2021-06-12 19:56:51,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:51,045 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:51,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:51,046 INFO L225 Difference]: With dead ends: 394 [2021-06-12 19:56:51,046 INFO L226 Difference]: Without dead ends: 379 [2021-06-12 19:56:51,046 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:56:51,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-12 19:56:51,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 327. [2021-06-12 19:56:51,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9846625766871164) internal successors, (973), 326 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:51,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 973 transitions. [2021-06-12 19:56:51,049 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 973 transitions. Word has length 20 [2021-06-12 19:56:51,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:51,049 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 973 transitions. [2021-06-12 19:56:51,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:51,050 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 973 transitions. [2021-06-12 19:56:51,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:51,050 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:51,050 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:51,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:51,250 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:51,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:51,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1408026672, now seen corresponding path program 101 times [2021-06-12 19:56:51,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:51,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089439794] [2021-06-12 19:56:51,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:51,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:51,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089439794] [2021-06-12 19:56:51,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089439794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:51,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009294968] [2021-06-12 19:56:51,368 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:51,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:56:51,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:51,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:56:51,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:51,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:51,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:51,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:51,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:51,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:51,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:30 [2021-06-12 19:56:51,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:51,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:51,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:56:51,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:51,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:51,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:56:51,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:51,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:51,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:51,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:51,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:51,521 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:51,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:51,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:51,524 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:51,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:51,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:56:51,554 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:99, output treesize:41 [2021-06-12 19:56:51,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:51,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009294968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:51,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:51,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:51,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439223425] [2021-06-12 19:56:51,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:51,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:51,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:51,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:51,666 INFO L87 Difference]: Start difference. First operand 327 states and 973 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:51,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:51,923 INFO L93 Difference]: Finished difference Result 485 states and 1434 transitions. [2021-06-12 19:56:51,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:56:51,923 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:51,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:51,924 INFO L225 Difference]: With dead ends: 485 [2021-06-12 19:56:51,924 INFO L226 Difference]: Without dead ends: 470 [2021-06-12 19:56:51,924 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 285.3ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:56:51,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-06-12 19:56:51,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 326. [2021-06-12 19:56:51,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9815384615384617) internal successors, (969), 325 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:51,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 969 transitions. [2021-06-12 19:56:51,928 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 969 transitions. Word has length 20 [2021-06-12 19:56:51,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:51,928 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 969 transitions. [2021-06-12 19:56:51,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:51,928 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 969 transitions. [2021-06-12 19:56:51,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:51,929 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:51,929 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:52,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-06-12 19:56:52,148 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:52,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:52,149 INFO L82 PathProgramCache]: Analyzing trace with hash -11639494, now seen corresponding path program 102 times [2021-06-12 19:56:52,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:52,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115767678] [2021-06-12 19:56:52,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:52,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:52,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:52,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115767678] [2021-06-12 19:56:52,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115767678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:52,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113042486] [2021-06-12 19:56:52,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:52,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:56:52,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:52,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:52,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:52,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:52,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:52,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:52,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:52,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:52,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 19:56:52,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:52,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:52,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:52,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:52,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:52,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:52,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:52,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:52,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:52,428 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 19:56:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:52,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113042486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:52,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:52,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:56:52,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089765607] [2021-06-12 19:56:52,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:56:52,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:52,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:56:52,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:56:52,442 INFO L87 Difference]: Start difference. First operand 326 states and 969 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:52,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:52,602 INFO L93 Difference]: Finished difference Result 389 states and 1147 transitions. [2021-06-12 19:56:52,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:52,602 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:52,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:52,602 INFO L225 Difference]: With dead ends: 389 [2021-06-12 19:56:52,602 INFO L226 Difference]: Without dead ends: 374 [2021-06-12 19:56:52,603 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:56:52,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-06-12 19:56:52,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 332. [2021-06-12 19:56:52,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.990936555891239) internal successors, (990), 331 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:52,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 990 transitions. [2021-06-12 19:56:52,606 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 990 transitions. Word has length 20 [2021-06-12 19:56:52,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:52,606 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 990 transitions. [2021-06-12 19:56:52,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:52,606 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 990 transitions. [2021-06-12 19:56:52,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:52,607 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:52,607 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:52,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:52,809 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:52,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:52,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1341567656, now seen corresponding path program 103 times [2021-06-12 19:56:52,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:52,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533690834] [2021-06-12 19:56:52,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:52,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:52,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:52,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533690834] [2021-06-12 19:56:52,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533690834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:52,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987650619] [2021-06-12 19:56:52,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:52,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:52,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:53,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:53,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:53,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:53,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:53,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:53,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 19:56:53,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:53,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:53,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:53,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:53,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:53,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:53,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:53,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:53,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:53,080 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:46, output treesize:15 [2021-06-12 19:56:53,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:53,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987650619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:53,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:53,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:53,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651429063] [2021-06-12 19:56:53,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:53,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:53,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:53,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:53,143 INFO L87 Difference]: Start difference. First operand 332 states and 990 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:53,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:53,271 INFO L93 Difference]: Finished difference Result 453 states and 1331 transitions. [2021-06-12 19:56:53,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:53,271 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:53,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:53,272 INFO L225 Difference]: With dead ends: 453 [2021-06-12 19:56:53,272 INFO L226 Difference]: Without dead ends: 438 [2021-06-12 19:56:53,272 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 209.5ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:53,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-12 19:56:53,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 329. [2021-06-12 19:56:53,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:53,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-06-12 19:56:53,275 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 20 [2021-06-12 19:56:53,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:53,275 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-06-12 19:56:53,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:53,275 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-06-12 19:56:53,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:53,276 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:53,276 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:53,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-06-12 19:56:53,489 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:53,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:53,489 INFO L82 PathProgramCache]: Analyzing trace with hash 2038318152, now seen corresponding path program 104 times [2021-06-12 19:56:53,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:53,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736871429] [2021-06-12 19:56:53,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:53,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:53,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:53,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736871429] [2021-06-12 19:56:53,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736871429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:53,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124300889] [2021-06-12 19:56:53,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:53,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:53,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:53,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:53,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:53,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:53,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:53,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:53,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:53,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:53,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:31 [2021-06-12 19:56:53,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:53,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:56:53,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:53,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:53,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:53,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:53,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:53,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:53,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:53,726 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:45, output treesize:15 [2021-06-12 19:56:53,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:53,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124300889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:53,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:53,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:53,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384772710] [2021-06-12 19:56:53,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:53,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:53,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:53,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:53,785 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:53,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:53,942 INFO L93 Difference]: Finished difference Result 445 states and 1312 transitions. [2021-06-12 19:56:53,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:53,943 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:53,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:53,943 INFO L225 Difference]: With dead ends: 445 [2021-06-12 19:56:53,943 INFO L226 Difference]: Without dead ends: 430 [2021-06-12 19:56:53,943 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 178.9ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:53,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-12 19:56:53,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 324. [2021-06-12 19:56:53,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.981424148606811) internal successors, (963), 323 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:53,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 963 transitions. [2021-06-12 19:56:53,947 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 963 transitions. Word has length 20 [2021-06-12 19:56:53,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:53,947 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 963 transitions. [2021-06-12 19:56:53,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:53,947 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 963 transitions. [2021-06-12 19:56:53,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:53,948 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:53,948 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:54,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-06-12 19:56:54,148 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:54,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:54,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1175221912, now seen corresponding path program 105 times [2021-06-12 19:56:54,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:54,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272594867] [2021-06-12 19:56:54,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:54,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:54,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:54,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272594867] [2021-06-12 19:56:54,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272594867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:54,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029751192] [2021-06-12 19:56:54,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:54,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:56:54,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:54,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:54,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:54,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:54,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:54,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:54,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:54,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:54,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 19:56:54,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:54,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:54,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:54,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:54,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:54,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:54,439 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:54,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:54,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:54,447 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:9 [2021-06-12 19:56:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:54,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029751192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:54,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:54,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:54,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459080098] [2021-06-12 19:56:54,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:54,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:54,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:54,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:54,474 INFO L87 Difference]: Start difference. First operand 324 states and 963 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:54,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:54,698 INFO L93 Difference]: Finished difference Result 449 states and 1325 transitions. [2021-06-12 19:56:54,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:54,698 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:54,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:54,699 INFO L225 Difference]: With dead ends: 449 [2021-06-12 19:56:54,699 INFO L226 Difference]: Without dead ends: 434 [2021-06-12 19:56:54,699 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 200.1ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:54,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-06-12 19:56:54,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 330. [2021-06-12 19:56:54,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9848024316109423) internal successors, (982), 329 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:54,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 982 transitions. [2021-06-12 19:56:54,704 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 982 transitions. Word has length 20 [2021-06-12 19:56:54,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:54,704 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 982 transitions. [2021-06-12 19:56:54,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:54,704 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 982 transitions. [2021-06-12 19:56:54,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:54,704 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:54,704 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:54,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-06-12 19:56:54,905 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:54,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:54,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1677013248, now seen corresponding path program 106 times [2021-06-12 19:56:54,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:54,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024873043] [2021-06-12 19:56:54,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:54,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:55,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:55,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:55,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024873043] [2021-06-12 19:56:55,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024873043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:55,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509395302] [2021-06-12 19:56:55,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:55,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:55,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:55,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:55,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:55,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:55,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:55,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:55,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:55,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:55,144 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 19:56:55,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:55,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:55,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:55,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:55,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:55,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:55,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:55,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:55,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:55,192 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:12 [2021-06-12 19:56:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:55,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509395302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:55,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:55,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:55,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436835119] [2021-06-12 19:56:55,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:55,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:55,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:55,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:55,237 INFO L87 Difference]: Start difference. First operand 330 states and 982 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:55,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:55,412 INFO L93 Difference]: Finished difference Result 455 states and 1338 transitions. [2021-06-12 19:56:55,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:55,421 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:55,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:55,421 INFO L225 Difference]: With dead ends: 455 [2021-06-12 19:56:55,421 INFO L226 Difference]: Without dead ends: 440 [2021-06-12 19:56:55,422 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 202.6ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:55,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-06-12 19:56:55,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 328. [2021-06-12 19:56:55,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.981651376146789) internal successors, (975), 327 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:55,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 975 transitions. [2021-06-12 19:56:55,427 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 975 transitions. Word has length 20 [2021-06-12 19:56:55,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:55,427 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 975 transitions. [2021-06-12 19:56:55,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:55,427 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 975 transitions. [2021-06-12 19:56:55,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:55,428 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:55,428 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:55,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:55,651 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:55,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:55,651 INFO L82 PathProgramCache]: Analyzing trace with hash 511169928, now seen corresponding path program 107 times [2021-06-12 19:56:55,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:55,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605265568] [2021-06-12 19:56:55,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:55,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:55,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:55,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:55,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605265568] [2021-06-12 19:56:55,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605265568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:55,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982188742] [2021-06-12 19:56:55,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:55,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:56:55,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:55,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:55,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:55,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:55,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:55,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:55,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:55,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:26 [2021-06-12 19:56:55,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:55,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:55,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:55,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:55,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:55,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:55,905 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:55,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:55,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:55,912 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:35, output treesize:12 [2021-06-12 19:56:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:55,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982188742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:55,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:55,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:55,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631558706] [2021-06-12 19:56:55,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:55,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:55,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:55,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:55,956 INFO L87 Difference]: Start difference. First operand 328 states and 975 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:56,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:56,096 INFO L93 Difference]: Finished difference Result 446 states and 1316 transitions. [2021-06-12 19:56:56,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:56,096 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:56,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:56,097 INFO L225 Difference]: With dead ends: 446 [2021-06-12 19:56:56,097 INFO L226 Difference]: Without dead ends: 431 [2021-06-12 19:56:56,097 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 201.8ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:56,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-06-12 19:56:56,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 326. [2021-06-12 19:56:56,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9846153846153847) internal successors, (970), 325 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:56,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 970 transitions. [2021-06-12 19:56:56,100 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 970 transitions. Word has length 20 [2021-06-12 19:56:56,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:56,100 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 970 transitions. [2021-06-12 19:56:56,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:56,101 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 970 transitions. [2021-06-12 19:56:56,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:56,101 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:56,101 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:56,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-06-12 19:56:56,302 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:56,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:56,302 INFO L82 PathProgramCache]: Analyzing trace with hash 546678026, now seen corresponding path program 108 times [2021-06-12 19:56:56,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:56,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066458779] [2021-06-12 19:56:56,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:56,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:56,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:56,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066458779] [2021-06-12 19:56:56,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066458779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:56,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91877067] [2021-06-12 19:56:56,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:56,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:56:56,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:56,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:56,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:56,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:56,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:56,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:56,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:56,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:56,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 19:56:56,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:56,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:56,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:56,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:56,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:56,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:56,662 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:56,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:56,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:56,669 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:9 [2021-06-12 19:56:56,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:56,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91877067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:56,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:56,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:56:56,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100110895] [2021-06-12 19:56:56,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:56:56,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:56,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:56:56,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:56:56,687 INFO L87 Difference]: Start difference. First operand 326 states and 970 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:56,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:56,870 INFO L93 Difference]: Finished difference Result 416 states and 1218 transitions. [2021-06-12 19:56:56,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:56,870 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:56,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:56,871 INFO L225 Difference]: With dead ends: 416 [2021-06-12 19:56:56,871 INFO L226 Difference]: Without dead ends: 401 [2021-06-12 19:56:56,871 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 195.6ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:56:56,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-12 19:56:56,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 332. [2021-06-12 19:56:56,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.0) internal successors, (993), 331 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:56,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 993 transitions. [2021-06-12 19:56:56,875 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 993 transitions. Word has length 20 [2021-06-12 19:56:56,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:56,875 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 993 transitions. [2021-06-12 19:56:56,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:56,875 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 993 transitions. [2021-06-12 19:56:56,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:56,875 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:56,875 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:57,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:57,076 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:57,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:57,076 INFO L82 PathProgramCache]: Analyzing trace with hash 44886690, now seen corresponding path program 109 times [2021-06-12 19:56:57,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:57,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863838227] [2021-06-12 19:56:57,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:57,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:57,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:57,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863838227] [2021-06-12 19:56:57,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863838227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:57,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523683034] [2021-06-12 19:56:57,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:57,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:57,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:57,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:57,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:57,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:57,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:57,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:57,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:57,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 19:56:57,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:57,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:57,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:57,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:57,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:57,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:57,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:57,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:57,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:57,395 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:12 [2021-06-12 19:56:57,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:57,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523683034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:57,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:57,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:56:57,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070351290] [2021-06-12 19:56:57,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:56:57,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:57,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:56:57,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:56:57,421 INFO L87 Difference]: Start difference. First operand 332 states and 993 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:57,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:57,582 INFO L93 Difference]: Finished difference Result 410 states and 1205 transitions. [2021-06-12 19:56:57,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:57,582 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:57,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:57,583 INFO L225 Difference]: With dead ends: 410 [2021-06-12 19:56:57,583 INFO L226 Difference]: Without dead ends: 395 [2021-06-12 19:56:57,583 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 183.2ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:56:57,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-06-12 19:56:57,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 330. [2021-06-12 19:56:57,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9969604863221884) internal successors, (986), 329 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:57,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 986 transitions. [2021-06-12 19:56:57,586 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 986 transitions. Word has length 20 [2021-06-12 19:56:57,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:57,587 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 986 transitions. [2021-06-12 19:56:57,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:57,587 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 986 transitions. [2021-06-12 19:56:57,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:57,587 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:57,587 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:57,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-12 19:56:57,788 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:57,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:57,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1486958454, now seen corresponding path program 110 times [2021-06-12 19:56:57,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:57,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801368219] [2021-06-12 19:56:57,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:57,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:57,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:57,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801368219] [2021-06-12 19:56:57,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801368219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:57,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671919188] [2021-06-12 19:56:57,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:57,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:57,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:57,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:57,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:58,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:58,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:58,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:58,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:58,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:58,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 19:56:58,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:58,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:58,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:58,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:58,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:58,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:58,139 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:58,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:58,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:58,150 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:45, output treesize:12 [2021-06-12 19:56:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:58,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671919188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:58,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:58,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:58,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099017508] [2021-06-12 19:56:58,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:58,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:58,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:58,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:58,210 INFO L87 Difference]: Start difference. First operand 330 states and 986 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:58,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:58,453 INFO L93 Difference]: Finished difference Result 461 states and 1355 transitions. [2021-06-12 19:56:58,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:58,453 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:58,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:58,454 INFO L225 Difference]: With dead ends: 461 [2021-06-12 19:56:58,454 INFO L226 Difference]: Without dead ends: 446 [2021-06-12 19:56:58,454 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 266.8ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:58,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-12 19:56:58,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 327. [2021-06-12 19:56:58,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9907975460122698) internal successors, (975), 326 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:58,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 975 transitions. [2021-06-12 19:56:58,458 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 975 transitions. Word has length 20 [2021-06-12 19:56:58,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:58,458 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 975 transitions. [2021-06-12 19:56:58,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:58,458 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 975 transitions. [2021-06-12 19:56:58,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:58,458 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:58,458 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:58,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-06-12 19:56:58,659 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:58,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:58,659 INFO L82 PathProgramCache]: Analyzing trace with hash 17343424, now seen corresponding path program 111 times [2021-06-12 19:56:58,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:58,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595617537] [2021-06-12 19:56:58,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:58,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:58,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:58,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:58,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595617537] [2021-06-12 19:56:58,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595617537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:58,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140491481] [2021-06-12 19:56:58,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:58,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:56:58,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:58,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:58,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:58,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:58,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:58,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:58,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:58,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:58,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 19:56:58,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:58,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:58,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:58,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:58,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:58,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:58,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:58,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:58,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:58,895 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:48, output treesize:18 [2021-06-12 19:56:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:58,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140491481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:58,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:58,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:56:58,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413693045] [2021-06-12 19:56:58,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:56:58,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:58,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:56:58,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:56:58,918 INFO L87 Difference]: Start difference. First operand 327 states and 975 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:59,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:59,054 INFO L93 Difference]: Finished difference Result 418 states and 1227 transitions. [2021-06-12 19:56:59,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:59,054 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:59,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:59,055 INFO L225 Difference]: With dead ends: 418 [2021-06-12 19:56:59,055 INFO L226 Difference]: Without dead ends: 403 [2021-06-12 19:56:59,055 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:56:59,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-12 19:56:59,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 326. [2021-06-12 19:56:59,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9846153846153847) internal successors, (970), 325 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:59,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 970 transitions. [2021-06-12 19:56:59,058 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 970 transitions. Word has length 20 [2021-06-12 19:56:59,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:59,058 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 970 transitions. [2021-06-12 19:56:59,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:59,058 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 970 transitions. [2021-06-12 19:56:59,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:59,059 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:59,059 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:59,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:59,259 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:59,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:59,260 INFO L82 PathProgramCache]: Analyzing trace with hash -342671318, now seen corresponding path program 112 times [2021-06-12 19:56:59,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:59,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668952200] [2021-06-12 19:56:59,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:59,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:59,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:59,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668952200] [2021-06-12 19:56:59,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668952200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:59,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474485373] [2021-06-12 19:56:59,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:59,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:59,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:59,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:59,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:59,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:59,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:59,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:59,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:59,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 19:56:59,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:59,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:56:59,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:59,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:59,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:59,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:56:59,527 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:59,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:59,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:59,533 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:35, output treesize:12 [2021-06-12 19:56:59,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:59,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474485373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:59,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:59,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:59,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488681228] [2021-06-12 19:56:59,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:59,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:59,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:59,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:59,576 INFO L87 Difference]: Start difference. First operand 326 states and 970 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:59,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:59,773 INFO L93 Difference]: Finished difference Result 464 states and 1361 transitions. [2021-06-12 19:56:59,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:59,773 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:56:59,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:59,773 INFO L225 Difference]: With dead ends: 464 [2021-06-12 19:56:59,773 INFO L226 Difference]: Without dead ends: 449 [2021-06-12 19:56:59,774 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 203.4ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:59,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-12 19:56:59,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 329. [2021-06-12 19:56:59,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9939024390243905) internal successors, (982), 328 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:59,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 982 transitions. [2021-06-12 19:56:59,777 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 982 transitions. Word has length 20 [2021-06-12 19:56:59,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:59,777 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 982 transitions. [2021-06-12 19:56:59,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:59,777 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 982 transitions. [2021-06-12 19:56:59,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:56:59,778 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:59,778 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:59,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:59,978 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:59,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:59,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1672599480, now seen corresponding path program 113 times [2021-06-12 19:56:59,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:59,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971352485] [2021-06-12 19:56:59,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:59,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:00,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:00,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:00,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971352485] [2021-06-12 19:57:00,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971352485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:00,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373541476] [2021-06-12 19:57:00,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:00,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:00,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:00,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:00,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:00,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:00,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:00,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:00,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:00,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 19:57:00,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:00,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:00,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:00,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:00,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:00,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:00,259 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:00,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:00,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:00,268 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:40, output treesize:15 [2021-06-12 19:57:00,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:00,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373541476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:00,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:00,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:00,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240756254] [2021-06-12 19:57:00,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:00,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:00,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:00,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:00,347 INFO L87 Difference]: Start difference. First operand 329 states and 982 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:00,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:00,565 INFO L93 Difference]: Finished difference Result 458 states and 1346 transitions. [2021-06-12 19:57:00,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:57:00,565 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:00,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:00,566 INFO L225 Difference]: With dead ends: 458 [2021-06-12 19:57:00,566 INFO L226 Difference]: Without dead ends: 443 [2021-06-12 19:57:00,566 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 229.4ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:00,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-12 19:57:00,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 325. [2021-06-12 19:57:00,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9814814814814814) internal successors, (966), 324 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:00,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 966 transitions. [2021-06-12 19:57:00,569 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 966 transitions. Word has length 20 [2021-06-12 19:57:00,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:00,570 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 966 transitions. [2021-06-12 19:57:00,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:00,570 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 966 transitions. [2021-06-12 19:57:00,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:00,570 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:00,570 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:00,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-06-12 19:57:00,771 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:00,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:00,771 INFO L82 PathProgramCache]: Analyzing trace with hash -2051044326, now seen corresponding path program 114 times [2021-06-12 19:57:00,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:00,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560233771] [2021-06-12 19:57:00,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:00,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:00,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:00,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:00,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560233771] [2021-06-12 19:57:00,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560233771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:00,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747473771] [2021-06-12 19:57:00,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:00,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:57:00,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:00,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:00,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:00,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:00,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:00,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:00,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:00,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:00,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 19:57:01,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:01,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:01,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:01,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:01,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:01,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:01,053 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:01,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:01,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:01,061 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:9 [2021-06-12 19:57:01,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:01,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747473771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:01,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:01,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:01,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796618354] [2021-06-12 19:57:01,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:01,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:01,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:01,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:01,088 INFO L87 Difference]: Start difference. First operand 325 states and 966 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:01,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:01,244 INFO L93 Difference]: Finished difference Result 450 states and 1328 transitions. [2021-06-12 19:57:01,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:57:01,244 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:01,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:01,245 INFO L225 Difference]: With dead ends: 450 [2021-06-12 19:57:01,245 INFO L226 Difference]: Without dead ends: 435 [2021-06-12 19:57:01,245 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 190.9ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:01,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-12 19:57:01,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 335. [2021-06-12 19:57:01,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.997005988023952) internal successors, (1001), 334 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:01,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1001 transitions. [2021-06-12 19:57:01,249 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1001 transitions. Word has length 20 [2021-06-12 19:57:01,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:01,249 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1001 transitions. [2021-06-12 19:57:01,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:01,249 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1001 transitions. [2021-06-12 19:57:01,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:01,249 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:01,249 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:01,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:01,450 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:01,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:01,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1742131634, now seen corresponding path program 115 times [2021-06-12 19:57:01,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:01,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5370171] [2021-06-12 19:57:01,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:01,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:01,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:01,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5370171] [2021-06-12 19:57:01,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5370171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:01,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538941544] [2021-06-12 19:57:01,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:01,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:01,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:01,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:01,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:01,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:01,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:01,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:01,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 19:57:01,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:01,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:01,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:01,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:01,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:01,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:01,709 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:01,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:01,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:01,718 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 19:57:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:01,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538941544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:01,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:01,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:01,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533235687] [2021-06-12 19:57:01,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:01,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:01,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:01,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:01,761 INFO L87 Difference]: Start difference. First operand 335 states and 1001 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:01,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:01,932 INFO L93 Difference]: Finished difference Result 456 states and 1341 transitions. [2021-06-12 19:57:01,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:57:01,932 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:01,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:01,933 INFO L225 Difference]: With dead ends: 456 [2021-06-12 19:57:01,933 INFO L226 Difference]: Without dead ends: 441 [2021-06-12 19:57:01,933 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 192.9ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:01,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-12 19:57:01,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 333. [2021-06-12 19:57:01,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9939759036144578) internal successors, (994), 332 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:01,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 994 transitions. [2021-06-12 19:57:01,936 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 994 transitions. Word has length 20 [2021-06-12 19:57:01,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:01,936 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 994 transitions. [2021-06-12 19:57:01,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:01,936 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 994 transitions. [2021-06-12 19:57:01,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:01,937 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:01,937 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:02,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:02,141 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:02,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:02,141 INFO L82 PathProgramCache]: Analyzing trace with hash 210286490, now seen corresponding path program 116 times [2021-06-12 19:57:02,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:02,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776792190] [2021-06-12 19:57:02,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:02,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:02,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776792190] [2021-06-12 19:57:02,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776792190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:02,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418144850] [2021-06-12 19:57:02,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:02,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:02,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:02,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:02,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:02,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:02,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:02,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:02,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:02,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:02,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 19:57:02,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:02,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:02,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:02,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:02,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:02,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:02,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:02,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:02,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:02,401 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:12 [2021-06-12 19:57:02,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:02,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418144850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:02,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:02,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:57:02,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459983439] [2021-06-12 19:57:02,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:57:02,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:02,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:57:02,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:57:02,414 INFO L87 Difference]: Start difference. First operand 333 states and 994 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:02,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:02,610 INFO L93 Difference]: Finished difference Result 409 states and 1201 transitions. [2021-06-12 19:57:02,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:02,610 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:02,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:02,611 INFO L225 Difference]: With dead ends: 409 [2021-06-12 19:57:02,611 INFO L226 Difference]: Without dead ends: 394 [2021-06-12 19:57:02,611 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 138.1ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:57:02,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-12 19:57:02,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 330. [2021-06-12 19:57:02,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.987841945288754) internal successors, (983), 329 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:02,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 983 transitions. [2021-06-12 19:57:02,615 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 983 transitions. Word has length 20 [2021-06-12 19:57:02,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:02,615 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 983 transitions. [2021-06-12 19:57:02,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:02,615 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 983 transitions. [2021-06-12 19:57:02,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:02,616 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:02,616 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:02,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-06-12 19:57:02,821 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:02,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:02,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1714588368, now seen corresponding path program 117 times [2021-06-12 19:57:02,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:02,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127853846] [2021-06-12 19:57:02,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:02,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:02,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127853846] [2021-06-12 19:57:02,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127853846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:02,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310013375] [2021-06-12 19:57:02,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:02,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:57:02,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:02,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:02,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:03,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:03,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:03,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:03,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:03,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:03,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 19:57:03,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:03,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:03,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:03,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:03,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:03,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:03,053 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:03,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:03,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:03,063 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:46, output treesize:15 [2021-06-12 19:57:03,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:03,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310013375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:03,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:03,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:57:03,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650367339] [2021-06-12 19:57:03,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:57:03,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:03,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:57:03,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:57:03,081 INFO L87 Difference]: Start difference. First operand 330 states and 983 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:03,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:03,224 INFO L93 Difference]: Finished difference Result 419 states and 1230 transitions. [2021-06-12 19:57:03,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:03,224 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:03,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:03,225 INFO L225 Difference]: With dead ends: 419 [2021-06-12 19:57:03,225 INFO L226 Difference]: Without dead ends: 404 [2021-06-12 19:57:03,225 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 143.8ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:57:03,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-12 19:57:03,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 329. [2021-06-12 19:57:03,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:03,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-06-12 19:57:03,228 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 20 [2021-06-12 19:57:03,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:03,229 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-06-12 19:57:03,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:03,229 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-06-12 19:57:03,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:03,229 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:03,229 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:03,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:03,430 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:03,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:03,430 INFO L82 PathProgramCache]: Analyzing trace with hash 828548658, now seen corresponding path program 118 times [2021-06-12 19:57:03,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:03,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064136899] [2021-06-12 19:57:03,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:03,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:03,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:03,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:03,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064136899] [2021-06-12 19:57:03,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064136899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:03,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988894679] [2021-06-12 19:57:03,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:03,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:03,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:03,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:03,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:03,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:03,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:03,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:03,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:03,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:03,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:28 [2021-06-12 19:57:03,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:03,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:57:03,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:03,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:03,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:03,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:03,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:03,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:03,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:03,674 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:42, output treesize:12 [2021-06-12 19:57:03,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:03,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988894679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:03,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:03,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:57:03,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69051169] [2021-06-12 19:57:03,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:57:03,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:03,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:57:03,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:57:03,686 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:03,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:03,832 INFO L93 Difference]: Finished difference Result 398 states and 1173 transitions. [2021-06-12 19:57:03,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:03,832 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:03,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:03,833 INFO L225 Difference]: With dead ends: 398 [2021-06-12 19:57:03,833 INFO L226 Difference]: Without dead ends: 383 [2021-06-12 19:57:03,833 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 142.1ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:57:03,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-12 19:57:03,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 326. [2021-06-12 19:57:03,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9846153846153847) internal successors, (970), 325 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:03,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 970 transitions. [2021-06-12 19:57:03,836 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 970 transitions. Word has length 20 [2021-06-12 19:57:03,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:03,837 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 970 transitions. [2021-06-12 19:57:03,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:03,837 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 970 transitions. [2021-06-12 19:57:03,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:03,837 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:03,837 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:04,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-06-12 19:57:04,038 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:04,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:04,038 INFO L82 PathProgramCache]: Analyzing trace with hash -890436024, now seen corresponding path program 119 times [2021-06-12 19:57:04,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:04,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132445752] [2021-06-12 19:57:04,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:04,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:04,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:04,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:04,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132445752] [2021-06-12 19:57:04,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132445752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:04,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135594295] [2021-06-12 19:57:04,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:04,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:57:04,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:04,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:57:04,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:04,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:04,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:04,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:04,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:04,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:04,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:31 [2021-06-12 19:57:04,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:04,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:04,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:57:04,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:04,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:04,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:57:04,262 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:04,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:04,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:04,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:04,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:04,299 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:04,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:04,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:04,302 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:04,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:04,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:04,335 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:101, output treesize:41 [2021-06-12 19:57:04,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:04,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135594295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:04,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:04,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:04,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673579688] [2021-06-12 19:57:04,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:04,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:04,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:04,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:04,452 INFO L87 Difference]: Start difference. First operand 326 states and 970 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:04,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:04,696 INFO L93 Difference]: Finished difference Result 490 states and 1449 transitions. [2021-06-12 19:57:04,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:57:04,696 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:04,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:04,697 INFO L225 Difference]: With dead ends: 490 [2021-06-12 19:57:04,697 INFO L226 Difference]: Without dead ends: 475 [2021-06-12 19:57:04,697 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 268.1ms TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:57:04,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-12 19:57:04,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 325. [2021-06-12 19:57:04,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9814814814814814) internal successors, (966), 324 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:04,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 966 transitions. [2021-06-12 19:57:04,701 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 966 transitions. Word has length 20 [2021-06-12 19:57:04,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:04,701 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 966 transitions. [2021-06-12 19:57:04,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:04,701 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 966 transitions. [2021-06-12 19:57:04,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:04,701 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:04,701 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:04,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:04,902 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:04,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:04,902 INFO L82 PathProgramCache]: Analyzing trace with hash 505951154, now seen corresponding path program 120 times [2021-06-12 19:57:04,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:04,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361174047] [2021-06-12 19:57:04,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:05,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:05,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361174047] [2021-06-12 19:57:05,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361174047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:05,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649731491] [2021-06-12 19:57:05,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:05,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:57:05,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:05,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:05,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:05,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:05,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:05,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:05,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:05,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 19:57:05,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:05,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:05,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:05,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:05,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:05,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:05,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:05,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:05,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:05,192 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:35, output treesize:12 [2021-06-12 19:57:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:05,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649731491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:05,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:05,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:57:05,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150685457] [2021-06-12 19:57:05,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:57:05,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:05,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:57:05,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:57:05,208 INFO L87 Difference]: Start difference. First operand 325 states and 966 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:05,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:05,347 INFO L93 Difference]: Finished difference Result 393 states and 1159 transitions. [2021-06-12 19:57:05,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:05,347 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:05,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:05,347 INFO L225 Difference]: With dead ends: 393 [2021-06-12 19:57:05,347 INFO L226 Difference]: Without dead ends: 378 [2021-06-12 19:57:05,348 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 161.4ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:57:05,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-12 19:57:05,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 331. [2021-06-12 19:57:05,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.9909090909090907) internal successors, (987), 330 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:05,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 987 transitions. [2021-06-12 19:57:05,352 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 987 transitions. Word has length 20 [2021-06-12 19:57:05,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:05,352 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 987 transitions. [2021-06-12 19:57:05,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:05,353 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 987 transitions. [2021-06-12 19:57:05,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:05,353 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:05,353 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:05,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable375,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:05,565 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:05,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:05,565 INFO L82 PathProgramCache]: Analyzing trace with hash -823977008, now seen corresponding path program 121 times [2021-06-12 19:57:05,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:05,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718990787] [2021-06-12 19:57:05,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:05,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:05,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718990787] [2021-06-12 19:57:05,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718990787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:05,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404653763] [2021-06-12 19:57:05,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:05,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:05,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:05,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:05,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:05,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:05,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:05,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 19:57:05,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:05,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:05,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:05,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:05,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:05,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:05,795 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:05,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:05,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:05,802 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:40, output treesize:15 [2021-06-12 19:57:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:05,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404653763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:05,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:05,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:05,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069136779] [2021-06-12 19:57:05,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:05,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:05,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:05,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:05,861 INFO L87 Difference]: Start difference. First operand 331 states and 987 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:06,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:06,092 INFO L93 Difference]: Finished difference Result 458 states and 1346 transitions. [2021-06-12 19:57:06,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:57:06,092 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:06,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:06,093 INFO L225 Difference]: With dead ends: 458 [2021-06-12 19:57:06,093 INFO L226 Difference]: Without dead ends: 443 [2021-06-12 19:57:06,093 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 191.4ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:06,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-12 19:57:06,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 328. [2021-06-12 19:57:06,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.981651376146789) internal successors, (975), 327 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:06,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 975 transitions. [2021-06-12 19:57:06,096 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 975 transitions. Word has length 20 [2021-06-12 19:57:06,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:06,096 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 975 transitions. [2021-06-12 19:57:06,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:06,096 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 975 transitions. [2021-06-12 19:57:06,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:06,097 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:06,097 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:06,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-06-12 19:57:06,297 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:06,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:06,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1739058496, now seen corresponding path program 122 times [2021-06-12 19:57:06,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:06,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702380502] [2021-06-12 19:57:06,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:06,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:06,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:06,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702380502] [2021-06-12 19:57:06,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702380502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:06,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299798541] [2021-06-12 19:57:06,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:06,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:06,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:06,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:06,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:06,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:06,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:06,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:06,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:06,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:06,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:25 [2021-06-12 19:57:06,501 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-12 19:57:06,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:57:06,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:06,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:06,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:06,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:06,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:06,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:06,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:06,526 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:39, output treesize:15 [2021-06-12 19:57:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:06,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299798541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:06,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:06,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:06,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958441404] [2021-06-12 19:57:06,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:06,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:06,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:06,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:06,586 INFO L87 Difference]: Start difference. First operand 328 states and 975 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:06,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:06,748 INFO L93 Difference]: Finished difference Result 450 states and 1327 transitions. [2021-06-12 19:57:06,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:57:06,757 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:06,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:06,758 INFO L225 Difference]: With dead ends: 450 [2021-06-12 19:57:06,758 INFO L226 Difference]: Without dead ends: 435 [2021-06-12 19:57:06,758 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 182.4ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:06,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-12 19:57:06,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 324. [2021-06-12 19:57:06,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.981424148606811) internal successors, (963), 323 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:06,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 963 transitions. [2021-06-12 19:57:06,763 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 963 transitions. Word has length 20 [2021-06-12 19:57:06,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:06,763 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 963 transitions. [2021-06-12 19:57:06,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:06,763 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 963 transitions. [2021-06-12 19:57:06,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:06,764 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:06,764 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:06,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:06,977 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:06,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:06,977 INFO L82 PathProgramCache]: Analyzing trace with hash -146183416, now seen corresponding path program 123 times [2021-06-12 19:57:06,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:06,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875771550] [2021-06-12 19:57:06,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:07,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:07,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875771550] [2021-06-12 19:57:07,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875771550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:07,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848302247] [2021-06-12 19:57:07,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:07,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:57:07,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:07,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:07,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:07,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:07,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:07,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:07,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:07,108 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 19:57:07,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:07,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:07,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:07,151 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 19:57:07,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:07,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:12 [2021-06-12 19:57:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:07,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848302247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:07,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:07,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:57:07,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278089873] [2021-06-12 19:57:07,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:07,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:07,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:07,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:07,191 INFO L87 Difference]: Start difference. First operand 324 states and 963 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:07,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:07,358 INFO L93 Difference]: Finished difference Result 567 states and 1671 transitions. [2021-06-12 19:57:07,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:57:07,358 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:07,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:07,359 INFO L225 Difference]: With dead ends: 567 [2021-06-12 19:57:07,359 INFO L226 Difference]: Without dead ends: 552 [2021-06-12 19:57:07,359 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 153.1ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:57:07,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-06-12 19:57:07,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 327. [2021-06-12 19:57:07,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.98159509202454) internal successors, (972), 326 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:07,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 972 transitions. [2021-06-12 19:57:07,363 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 972 transitions. Word has length 20 [2021-06-12 19:57:07,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:07,363 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 972 transitions. [2021-06-12 19:57:07,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:07,363 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 972 transitions. [2021-06-12 19:57:07,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:07,363 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:07,363 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:07,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:07,564 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:07,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:07,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1981568732, now seen corresponding path program 124 times [2021-06-12 19:57:07,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:07,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041476371] [2021-06-12 19:57:07,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:07,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:07,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:07,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:07,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041476371] [2021-06-12 19:57:07,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041476371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:07,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589446873] [2021-06-12 19:57:07,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:07,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:07,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:07,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:07,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:07,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:07,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:07,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:07,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:07,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:57:07,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:07,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:07,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:07,794 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 19:57:07,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:07,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:12 [2021-06-12 19:57:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:07,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589446873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:07,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:07,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:57:07,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388779832] [2021-06-12 19:57:07,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:57:07,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:07,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:57:07,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:57:07,813 INFO L87 Difference]: Start difference. First operand 327 states and 972 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:08,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:08,034 INFO L93 Difference]: Finished difference Result 424 states and 1250 transitions. [2021-06-12 19:57:08,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:08,034 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:08,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:08,035 INFO L225 Difference]: With dead ends: 424 [2021-06-12 19:57:08,035 INFO L226 Difference]: Without dead ends: 409 [2021-06-12 19:57:08,035 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 140.1ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:57:08,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-06-12 19:57:08,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 333. [2021-06-12 19:57:08,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9909638554216866) internal successors, (993), 332 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:08,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 993 transitions. [2021-06-12 19:57:08,040 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 993 transitions. Word has length 20 [2021-06-12 19:57:08,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:08,040 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 993 transitions. [2021-06-12 19:57:08,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:08,040 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 993 transitions. [2021-06-12 19:57:08,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:08,041 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:08,041 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:08,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:08,253 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:08,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:08,253 INFO L82 PathProgramCache]: Analyzing trace with hash 651640570, now seen corresponding path program 125 times [2021-06-12 19:57:08,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:08,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401496189] [2021-06-12 19:57:08,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:08,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:08,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401496189] [2021-06-12 19:57:08,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401496189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:08,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47308317] [2021-06-12 19:57:08,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:08,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:57:08,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:08,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:57:08,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:08,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:08,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:08,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:08,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:08,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:08,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:08,430 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-06-12 19:57:08,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:08,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:08,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:08,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:08,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:08,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:08,507 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 19:57:08,507 INFO L518 ElimStorePlain]: Eliminatee v_prenex_10 vanished before elimination [2021-06-12 19:57:08,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:08,507 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:71, output treesize:41 [2021-06-12 19:57:08,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:08,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47308317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:08,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:08,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:57:08,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879329046] [2021-06-12 19:57:08,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:08,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:08,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:08,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:08,607 INFO L87 Difference]: Start difference. First operand 333 states and 993 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:08,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:08,892 INFO L93 Difference]: Finished difference Result 502 states and 1488 transitions. [2021-06-12 19:57:08,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:57:08,893 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:08,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:08,893 INFO L225 Difference]: With dead ends: 502 [2021-06-12 19:57:08,893 INFO L226 Difference]: Without dead ends: 487 [2021-06-12 19:57:08,893 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 253.6ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:08,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-12 19:57:08,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 330. [2021-06-12 19:57:08,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9817629179331306) internal successors, (981), 329 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:08,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 981 transitions. [2021-06-12 19:57:08,898 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 981 transitions. Word has length 20 [2021-06-12 19:57:08,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:08,898 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 981 transitions. [2021-06-12 19:57:08,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:08,899 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 981 transitions. [2021-06-12 19:57:08,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:08,899 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:08,899 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:09,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable384 [2021-06-12 19:57:09,116 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:09,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:09,116 INFO L82 PathProgramCache]: Analyzing trace with hash -263440918, now seen corresponding path program 126 times [2021-06-12 19:57:09,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:09,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572128034] [2021-06-12 19:57:09,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:09,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:09,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:09,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572128034] [2021-06-12 19:57:09,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572128034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:09,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855089754] [2021-06-12 19:57:09,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:09,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:57:09,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:09,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:09,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:09,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:09,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:09,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:09,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:09,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-06-12 19:57:09,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:57:09,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:09,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:09,290 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:09,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:09,291 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:15 [2021-06-12 19:57:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:09,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855089754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:09,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:09,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:57:09,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504967776] [2021-06-12 19:57:09,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:09,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:09,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:09,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:09,346 INFO L87 Difference]: Start difference. First operand 330 states and 981 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:09,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:09,555 INFO L93 Difference]: Finished difference Result 481 states and 1418 transitions. [2021-06-12 19:57:09,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:57:09,555 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:09,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:09,556 INFO L225 Difference]: With dead ends: 481 [2021-06-12 19:57:09,556 INFO L226 Difference]: Without dead ends: 466 [2021-06-12 19:57:09,556 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 163.8ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:09,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-06-12 19:57:09,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 327. [2021-06-12 19:57:09,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.98159509202454) internal successors, (972), 326 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:09,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 972 transitions. [2021-06-12 19:57:09,560 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 972 transitions. Word has length 20 [2021-06-12 19:57:09,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:09,560 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 972 transitions. [2021-06-12 19:57:09,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:09,560 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 972 transitions. [2021-06-12 19:57:09,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:09,560 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:09,560 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:09,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:09,761 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:09,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:09,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1576469964, now seen corresponding path program 127 times [2021-06-12 19:57:09,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:09,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214187885] [2021-06-12 19:57:09,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:09,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:09,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:09,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:09,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214187885] [2021-06-12 19:57:09,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214187885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:09,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604732430] [2021-06-12 19:57:09,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:09,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:09,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:09,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:09,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:09,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:09,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:09,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:23 [2021-06-12 19:57:09,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:09,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:09,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:09,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:09,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:09,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:09,996 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:10,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:10,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:10,004 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:9 [2021-06-12 19:57:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:10,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604732430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:10,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:10,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:10,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067829166] [2021-06-12 19:57:10,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:10,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:10,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:10,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:10,041 INFO L87 Difference]: Start difference. First operand 327 states and 972 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:10,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:10,420 INFO L93 Difference]: Finished difference Result 522 states and 1543 transitions. [2021-06-12 19:57:10,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:57:10,421 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:10,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:10,421 INFO L225 Difference]: With dead ends: 522 [2021-06-12 19:57:10,422 INFO L226 Difference]: Without dead ends: 507 [2021-06-12 19:57:10,422 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 344.3ms TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:57:10,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-06-12 19:57:10,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 339. [2021-06-12 19:57:10,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.997041420118343) internal successors, (1013), 338 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:10,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1013 transitions. [2021-06-12 19:57:10,426 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1013 transitions. Word has length 20 [2021-06-12 19:57:10,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:10,426 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1013 transitions. [2021-06-12 19:57:10,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:10,426 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1013 transitions. [2021-06-12 19:57:10,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:10,426 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:10,427 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:10,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-06-12 19:57:10,627 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:10,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:10,627 INFO L82 PathProgramCache]: Analyzing trace with hash -2078261300, now seen corresponding path program 128 times [2021-06-12 19:57:10,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:10,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119730283] [2021-06-12 19:57:10,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:10,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:10,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:10,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119730283] [2021-06-12 19:57:10,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119730283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:10,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748343182] [2021-06-12 19:57:10,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:10,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:10,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:10,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:10,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:10,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:10,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:10,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:10,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:10,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:23 [2021-06-12 19:57:10,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:10,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:10,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:10,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:10,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:10,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:10,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:10,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:10,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:10,920 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:12 [2021-06-12 19:57:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:10,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748343182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:10,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:10,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:10,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681165369] [2021-06-12 19:57:10,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:10,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:10,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:10,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:10,980 INFO L87 Difference]: Start difference. First operand 339 states and 1013 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:11,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:11,337 INFO L93 Difference]: Finished difference Result 528 states and 1556 transitions. [2021-06-12 19:57:11,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:57:11,337 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:11,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:11,338 INFO L225 Difference]: With dead ends: 528 [2021-06-12 19:57:11,338 INFO L226 Difference]: Without dead ends: 513 [2021-06-12 19:57:11,338 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 345.0ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:57:11,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-12 19:57:11,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 337. [2021-06-12 19:57:11,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.994047619047619) internal successors, (1006), 336 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:11,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1006 transitions. [2021-06-12 19:57:11,342 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1006 transitions. Word has length 20 [2021-06-12 19:57:11,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:11,342 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1006 transitions. [2021-06-12 19:57:11,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:11,342 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1006 transitions. [2021-06-12 19:57:11,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:11,342 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:11,342 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:11,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:11,543 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:11,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:11,543 INFO L82 PathProgramCache]: Analyzing trace with hash 109921876, now seen corresponding path program 129 times [2021-06-12 19:57:11,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:11,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450989712] [2021-06-12 19:57:11,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:11,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:11,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450989712] [2021-06-12 19:57:11,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450989712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:11,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564164976] [2021-06-12 19:57:11,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:11,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:57:11,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:11,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:11,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:11,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:11,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:11,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:11,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:11,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:11,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-06-12 19:57:11,749 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_2]} [2021-06-12 19:57:11,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:11,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:11,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:11,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:11,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:11,760 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:11,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:11,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:11,766 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:12 [2021-06-12 19:57:11,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:11,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564164976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:11,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:11,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:11,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742847416] [2021-06-12 19:57:11,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:11,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:11,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:11,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:11,807 INFO L87 Difference]: Start difference. First operand 337 states and 1006 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:12,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:12,280 INFO L93 Difference]: Finished difference Result 549 states and 1626 transitions. [2021-06-12 19:57:12,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:57:12,281 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:12,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:12,281 INFO L225 Difference]: With dead ends: 549 [2021-06-12 19:57:12,281 INFO L226 Difference]: Without dead ends: 534 [2021-06-12 19:57:12,281 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 329.3ms TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:57:12,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-12 19:57:12,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 339. [2021-06-12 19:57:12,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.997041420118343) internal successors, (1013), 338 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:12,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1013 transitions. [2021-06-12 19:57:12,285 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1013 transitions. Word has length 20 [2021-06-12 19:57:12,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:12,286 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1013 transitions. [2021-06-12 19:57:12,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:12,286 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1013 transitions. [2021-06-12 19:57:12,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:12,286 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:12,286 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:12,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:12,487 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:12,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:12,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1150157674, now seen corresponding path program 130 times [2021-06-12 19:57:12,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:12,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380081669] [2021-06-12 19:57:12,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:12,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:12,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:12,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380081669] [2021-06-12 19:57:12,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380081669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:12,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254081510] [2021-06-12 19:57:12,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:12,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:12,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:12,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:12,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:12,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:12,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:12,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:12,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:12,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:12,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:25 [2021-06-12 19:57:12,701 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_2]} [2021-06-12 19:57:12,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:12,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:12,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:12,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:12,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:12,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:12,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:12,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:12,718 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:12 [2021-06-12 19:57:12,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:12,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254081510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:12,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:12,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:12,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263765004] [2021-06-12 19:57:12,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:12,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:12,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:12,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:12,761 INFO L87 Difference]: Start difference. First operand 339 states and 1013 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:13,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:13,391 INFO L93 Difference]: Finished difference Result 676 states and 2000 transitions. [2021-06-12 19:57:13,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:57:13,391 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:13,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:13,392 INFO L225 Difference]: With dead ends: 676 [2021-06-12 19:57:13,392 INFO L226 Difference]: Without dead ends: 661 [2021-06-12 19:57:13,392 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 481.7ms TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:57:13,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-06-12 19:57:13,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 337. [2021-06-12 19:57:13,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.0) internal successors, (1008), 336 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:13,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1008 transitions. [2021-06-12 19:57:13,397 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1008 transitions. Word has length 20 [2021-06-12 19:57:13,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:13,397 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1008 transitions. [2021-06-12 19:57:13,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:13,397 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1008 transitions. [2021-06-12 19:57:13,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:13,397 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:13,398 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:13,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:13,598 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:13,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:13,598 INFO L82 PathProgramCache]: Analyzing trace with hash 585725364, now seen corresponding path program 131 times [2021-06-12 19:57:13,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:13,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139593635] [2021-06-12 19:57:13,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:13,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:13,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:13,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:13,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139593635] [2021-06-12 19:57:13,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139593635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:13,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26357169] [2021-06-12 19:57:13,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:13,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:57:13,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:13,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:13,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:13,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:13,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:13,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:13,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:13,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:13,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 19:57:13,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:13,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:13,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:13,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:13,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:13,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:13,898 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:13,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:13,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:13,906 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:45, output treesize:12 [2021-06-12 19:57:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:13,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26357169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:13,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:13,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:13,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159793525] [2021-06-12 19:57:13,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:13,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:13,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:13,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:13,949 INFO L87 Difference]: Start difference. First operand 337 states and 1008 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:14,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:14,334 INFO L93 Difference]: Finished difference Result 537 states and 1582 transitions. [2021-06-12 19:57:14,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:57:14,335 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:14,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:14,335 INFO L225 Difference]: With dead ends: 537 [2021-06-12 19:57:14,336 INFO L226 Difference]: Without dead ends: 522 [2021-06-12 19:57:14,336 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 352.5ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:57:14,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-06-12 19:57:14,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 334. [2021-06-12 19:57:14,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.993993993993994) internal successors, (997), 333 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:14,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 997 transitions. [2021-06-12 19:57:14,339 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 997 transitions. Word has length 20 [2021-06-12 19:57:14,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:14,340 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 997 transitions. [2021-06-12 19:57:14,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:14,340 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 997 transitions. [2021-06-12 19:57:14,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:14,343 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:14,343 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:14,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:14,544 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:14,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:14,544 INFO L82 PathProgramCache]: Analyzing trace with hash 2090027242, now seen corresponding path program 132 times [2021-06-12 19:57:14,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:14,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750423132] [2021-06-12 19:57:14,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:14,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:14,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750423132] [2021-06-12 19:57:14,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750423132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:14,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609152301] [2021-06-12 19:57:14,655 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:14,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:57:14,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:14,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:14,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:14,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:14,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:14,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:14,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:14,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:57:14,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:14,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:14,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:14,769 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:14,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:14,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:15 [2021-06-12 19:57:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:14,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609152301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:14,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:14,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 19:57:14,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985341328] [2021-06-12 19:57:14,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:57:14,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:14,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:57:14,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:57:14,791 INFO L87 Difference]: Start difference. First operand 334 states and 997 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:14,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:14,953 INFO L93 Difference]: Finished difference Result 456 states and 1342 transitions. [2021-06-12 19:57:14,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:14,954 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:14,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:14,954 INFO L225 Difference]: With dead ends: 456 [2021-06-12 19:57:14,954 INFO L226 Difference]: Without dead ends: 441 [2021-06-12 19:57:14,954 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:57:14,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-12 19:57:14,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 333. [2021-06-12 19:57:14,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9879518072289155) internal successors, (992), 332 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:14,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 992 transitions. [2021-06-12 19:57:14,958 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 992 transitions. Word has length 20 [2021-06-12 19:57:14,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:14,958 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 992 transitions. [2021-06-12 19:57:14,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:14,958 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 992 transitions. [2021-06-12 19:57:14,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:14,959 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:14,959 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:15,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-06-12 19:57:15,159 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:15,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:15,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1730012500, now seen corresponding path program 133 times [2021-06-12 19:57:15,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:15,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280431015] [2021-06-12 19:57:15,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:15,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:15,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280431015] [2021-06-12 19:57:15,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280431015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:15,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554238247] [2021-06-12 19:57:15,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:15,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:15,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:15,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:15,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:15,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:15,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:15,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:15,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 19:57:15,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:15,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:15,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:15,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:15,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:15,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:15,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:15,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:15,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:15,418 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:35, output treesize:12 [2021-06-12 19:57:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:15,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554238247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:15,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:15,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:15,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136457654] [2021-06-12 19:57:15,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:15,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:15,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:15,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:15,461 INFO L87 Difference]: Start difference. First operand 333 states and 992 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:16,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:16,051 INFO L93 Difference]: Finished difference Result 563 states and 1655 transitions. [2021-06-12 19:57:16,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:57:16,051 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:16,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:16,052 INFO L225 Difference]: With dead ends: 563 [2021-06-12 19:57:16,052 INFO L226 Difference]: Without dead ends: 548 [2021-06-12 19:57:16,052 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 361.0ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:57:16,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-06-12 19:57:16,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 336. [2021-06-12 19:57:16,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.997014925373134) internal successors, (1004), 335 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:16,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1004 transitions. [2021-06-12 19:57:16,057 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1004 transitions. Word has length 20 [2021-06-12 19:57:16,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:16,057 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1004 transitions. [2021-06-12 19:57:16,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:16,057 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1004 transitions. [2021-06-12 19:57:16,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:16,058 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:16,058 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:16,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-12 19:57:16,281 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:16,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:16,281 INFO L82 PathProgramCache]: Analyzing trace with hash 400084338, now seen corresponding path program 134 times [2021-06-12 19:57:16,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:16,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402931545] [2021-06-12 19:57:16,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:16,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:16,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402931545] [2021-06-12 19:57:16,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402931545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:16,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284493153] [2021-06-12 19:57:16,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:16,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:16,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:16,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:16,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:16,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:16,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:16,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:16,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:16,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 19:57:16,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:16,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:16,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:16,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:16,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:16,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:16,501 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:16,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:16,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:16,508 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:40, output treesize:15 [2021-06-12 19:57:16,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:16,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284493153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:16,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:16,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:16,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824257144] [2021-06-12 19:57:16,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:16,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:16,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:16,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:16,568 INFO L87 Difference]: Start difference. First operand 336 states and 1004 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:17,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:17,024 INFO L93 Difference]: Finished difference Result 557 states and 1640 transitions. [2021-06-12 19:57:17,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:57:17,024 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:17,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:17,025 INFO L225 Difference]: With dead ends: 557 [2021-06-12 19:57:17,025 INFO L226 Difference]: Without dead ends: 542 [2021-06-12 19:57:17,025 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 363.4ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:57:17,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-12 19:57:17,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 332. [2021-06-12 19:57:17,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.984894259818731) internal successors, (988), 331 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:17,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 988 transitions. [2021-06-12 19:57:17,029 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 988 transitions. Word has length 20 [2021-06-12 19:57:17,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:17,029 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 988 transitions. [2021-06-12 19:57:17,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:17,029 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 988 transitions. [2021-06-12 19:57:17,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:17,030 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:17,030 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:17,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:17,230 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:17,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:17,231 INFO L82 PathProgramCache]: Analyzing trace with hash 450882824, now seen corresponding path program 135 times [2021-06-12 19:57:17,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:17,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16321890] [2021-06-12 19:57:17,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:17,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:17,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:17,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:17,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16321890] [2021-06-12 19:57:17,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16321890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:17,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492954854] [2021-06-12 19:57:17,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:17,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:57:17,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:17,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:17,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:17,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:17,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:17,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:17,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:17,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 19:57:17,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:17,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:17,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:17,428 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 19:57:17,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:17,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:12 [2021-06-12 19:57:17,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:17,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492954854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:17,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:17,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:17,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65076078] [2021-06-12 19:57:17,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:17,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:17,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:17,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:17,486 INFO L87 Difference]: Start difference. First operand 332 states and 988 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:18,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:18,029 INFO L93 Difference]: Finished difference Result 653 states and 1917 transitions. [2021-06-12 19:57:18,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:57:18,029 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:18,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:18,030 INFO L225 Difference]: With dead ends: 653 [2021-06-12 19:57:18,030 INFO L226 Difference]: Without dead ends: 638 [2021-06-12 19:57:18,030 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 392.2ms TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:57:18,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-06-12 19:57:18,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 331. [2021-06-12 19:57:18,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.981818181818182) internal successors, (984), 330 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:18,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 984 transitions. [2021-06-12 19:57:18,034 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 984 transitions. Word has length 20 [2021-06-12 19:57:18,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:18,034 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 984 transitions. [2021-06-12 19:57:18,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:18,034 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 984 transitions. [2021-06-12 19:57:18,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:18,035 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:18,035 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:18,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-12 19:57:18,235 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:18,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:18,236 INFO L82 PathProgramCache]: Analyzing trace with hash -40662816, now seen corresponding path program 136 times [2021-06-12 19:57:18,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:18,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755056724] [2021-06-12 19:57:18,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:18,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:18,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:18,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:18,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755056724] [2021-06-12 19:57:18,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755056724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:18,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355601746] [2021-06-12 19:57:18,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:18,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:18,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:18,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:18,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:18,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:18,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:18,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:18,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:18,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:18,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 19:57:18,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:18,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:18,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:18,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:18,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:18,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:18,545 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:18,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:18,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:18,553 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:9 [2021-06-12 19:57:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:18,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355601746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:18,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:18,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:18,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698503990] [2021-06-12 19:57:18,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:18,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:18,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:18,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:18,580 INFO L87 Difference]: Start difference. First operand 331 states and 984 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:18,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:18,902 INFO L93 Difference]: Finished difference Result 489 states and 1444 transitions. [2021-06-12 19:57:18,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:57:18,902 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:18,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:18,903 INFO L225 Difference]: With dead ends: 489 [2021-06-12 19:57:18,903 INFO L226 Difference]: Without dead ends: 474 [2021-06-12 19:57:18,903 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 282.5ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:18,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-06-12 19:57:18,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 333. [2021-06-12 19:57:18,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9849397590361444) internal successors, (991), 332 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:18,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 991 transitions. [2021-06-12 19:57:18,907 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 991 transitions. Word has length 20 [2021-06-12 19:57:18,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:18,907 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 991 transitions. [2021-06-12 19:57:18,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:18,907 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 991 transitions. [2021-06-12 19:57:18,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:18,908 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:18,908 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:19,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:19,108 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:19,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:19,109 INFO L82 PathProgramCache]: Analyzing trace with hash -542454152, now seen corresponding path program 137 times [2021-06-12 19:57:19,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:19,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296268253] [2021-06-12 19:57:19,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:19,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:19,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:19,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296268253] [2021-06-12 19:57:19,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296268253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:19,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996291535] [2021-06-12 19:57:19,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:19,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:19,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:19,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:19,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:19,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:19,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:19,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:19,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:19,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:19,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 19:57:19,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:19,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:19,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:19,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:19,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:19,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:19,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:19,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:19,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:19,392 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:12 [2021-06-12 19:57:19,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:19,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996291535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:19,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:19,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:19,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968116365] [2021-06-12 19:57:19,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:19,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:19,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:19,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:19,435 INFO L87 Difference]: Start difference. First operand 333 states and 991 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:19,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:19,796 INFO L93 Difference]: Finished difference Result 495 states and 1457 transitions. [2021-06-12 19:57:19,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:57:19,796 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:19,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:19,797 INFO L225 Difference]: With dead ends: 495 [2021-06-12 19:57:19,797 INFO L226 Difference]: Without dead ends: 480 [2021-06-12 19:57:19,797 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 287.6ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:19,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-12 19:57:19,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 329. [2021-06-12 19:57:19,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9847560975609757) internal successors, (979), 328 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:19,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 979 transitions. [2021-06-12 19:57:19,801 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 979 transitions. Word has length 20 [2021-06-12 19:57:19,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:19,801 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 979 transitions. [2021-06-12 19:57:19,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:19,801 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 979 transitions. [2021-06-12 19:57:19,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:19,801 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:19,801 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:20,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-12 19:57:20,002 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:20,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:20,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1681237122, now seen corresponding path program 138 times [2021-06-12 19:57:20,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:20,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044356122] [2021-06-12 19:57:20,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:20,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:20,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:20,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044356122] [2021-06-12 19:57:20,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044356122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:20,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221492758] [2021-06-12 19:57:20,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:20,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:57:20,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:20,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:20,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:20,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:20,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:20,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:20,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:20,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:20,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 19:57:20,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:20,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:20,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:20,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:20,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:20,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:20,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:20,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:20,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:20,293 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:9 [2021-06-12 19:57:20,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:20,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221492758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:20,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:20,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:57:20,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390637388] [2021-06-12 19:57:20,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:57:20,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:20,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:57:20,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:57:20,304 INFO L87 Difference]: Start difference. First operand 329 states and 979 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:20,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:20,485 INFO L93 Difference]: Finished difference Result 418 states and 1225 transitions. [2021-06-12 19:57:20,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:20,485 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:20,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:20,486 INFO L225 Difference]: With dead ends: 418 [2021-06-12 19:57:20,486 INFO L226 Difference]: Without dead ends: 403 [2021-06-12 19:57:20,486 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 154.8ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:57:20,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-12 19:57:20,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 335. [2021-06-12 19:57:20,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.0) internal successors, (1002), 334 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:20,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1002 transitions. [2021-06-12 19:57:20,490 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1002 transitions. Word has length 20 [2021-06-12 19:57:20,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:20,490 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1002 transitions. [2021-06-12 19:57:20,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:20,490 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1002 transitions. [2021-06-12 19:57:20,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:20,490 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:20,490 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:20,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-06-12 19:57:20,691 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:20,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:20,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1179445786, now seen corresponding path program 139 times [2021-06-12 19:57:20,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:20,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586660646] [2021-06-12 19:57:20,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:20,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:20,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586660646] [2021-06-12 19:57:20,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586660646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:20,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381374296] [2021-06-12 19:57:20,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:20,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:20,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:20,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:20,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:20,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:20,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:20,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:20,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 19:57:20,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:20,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:20,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:20,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:20,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:20,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:20,960 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:20,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:20,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:20,969 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:12 [2021-06-12 19:57:20,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:20,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381374296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:20,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:20,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:57:20,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226983728] [2021-06-12 19:57:20,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:57:20,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:20,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:57:20,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:57:20,983 INFO L87 Difference]: Start difference. First operand 335 states and 1002 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:21,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:21,183 INFO L93 Difference]: Finished difference Result 412 states and 1212 transitions. [2021-06-12 19:57:21,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:21,184 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:21,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:21,184 INFO L225 Difference]: With dead ends: 412 [2021-06-12 19:57:21,184 INFO L226 Difference]: Without dead ends: 397 [2021-06-12 19:57:21,184 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 162.9ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:57:21,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-12 19:57:21,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 333. [2021-06-12 19:57:21,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.996987951807229) internal successors, (995), 332 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:21,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 995 transitions. [2021-06-12 19:57:21,188 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 995 transitions. Word has length 20 [2021-06-12 19:57:21,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:21,188 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 995 transitions. [2021-06-12 19:57:21,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:21,188 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 995 transitions. [2021-06-12 19:57:21,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:21,189 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:21,189 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:21,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-12 19:57:21,391 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:21,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:21,391 INFO L82 PathProgramCache]: Analyzing trace with hash -352399358, now seen corresponding path program 140 times [2021-06-12 19:57:21,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:21,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321187404] [2021-06-12 19:57:21,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:21,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:21,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321187404] [2021-06-12 19:57:21,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321187404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:21,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570333924] [2021-06-12 19:57:21,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:21,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:21,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:21,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:21,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:21,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:21,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:21,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:21,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:21,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 19:57:21,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:21,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:21,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:21,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:21,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:21,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:21,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:21,672 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:45, output treesize:15 [2021-06-12 19:57:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:21,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570333924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:21,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:21,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:21,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516929158] [2021-06-12 19:57:21,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:21,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:21,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:21,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:21,715 INFO L87 Difference]: Start difference. First operand 333 states and 995 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:22,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:22,002 INFO L93 Difference]: Finished difference Result 501 states and 1474 transitions. [2021-06-12 19:57:22,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:57:22,002 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:22,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:22,003 INFO L225 Difference]: With dead ends: 501 [2021-06-12 19:57:22,003 INFO L226 Difference]: Without dead ends: 486 [2021-06-12 19:57:22,003 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 287.4ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:22,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-12 19:57:22,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 330. [2021-06-12 19:57:22,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9908814589665655) internal successors, (984), 329 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:22,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 984 transitions. [2021-06-12 19:57:22,007 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 984 transitions. Word has length 20 [2021-06-12 19:57:22,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:22,007 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 984 transitions. [2021-06-12 19:57:22,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:22,007 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 984 transitions. [2021-06-12 19:57:22,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:22,008 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:22,008 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:22,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:22,208 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:22,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:22,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1151902520, now seen corresponding path program 141 times [2021-06-12 19:57:22,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:22,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152598846] [2021-06-12 19:57:22,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:22,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:22,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152598846] [2021-06-12 19:57:22,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152598846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:22,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104648735] [2021-06-12 19:57:22,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:22,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:57:22,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:22,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:22,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:22,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:22,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:22,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:22,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:22,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:22,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-06-12 19:57:22,437 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 19:57:22,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:22,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:22,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:22,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:22,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:22,449 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:22,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:22,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:22,456 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:40, output treesize:15 [2021-06-12 19:57:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:22,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104648735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:22,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:22,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:22,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604411280] [2021-06-12 19:57:22,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:22,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:22,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:22,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:22,515 INFO L87 Difference]: Start difference. First operand 330 states and 984 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:22,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:22,740 INFO L93 Difference]: Finished difference Result 507 states and 1491 transitions. [2021-06-12 19:57:22,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:57:22,741 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:22,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:22,741 INFO L225 Difference]: With dead ends: 507 [2021-06-12 19:57:22,741 INFO L226 Difference]: Without dead ends: 492 [2021-06-12 19:57:22,741 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 228.4ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:22,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-06-12 19:57:22,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 329. [2021-06-12 19:57:22,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9847560975609757) internal successors, (979), 328 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:22,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 979 transitions. [2021-06-12 19:57:22,745 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 979 transitions. Word has length 20 [2021-06-12 19:57:22,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:22,745 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 979 transitions. [2021-06-12 19:57:22,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:22,745 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 979 transitions. [2021-06-12 19:57:22,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:22,746 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:22,746 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:22,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-06-12 19:57:22,946 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:22,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:22,946 INFO L82 PathProgramCache]: Analyzing trace with hash 791887778, now seen corresponding path program 142 times [2021-06-12 19:57:22,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:22,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122363221] [2021-06-12 19:57:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:23,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:23,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:23,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122363221] [2021-06-12 19:57:23,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122363221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:23,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030938634] [2021-06-12 19:57:23,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:23,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:23,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:23,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:23,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:23,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:23,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:23,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:23,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:23,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 19:57:23,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:23,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:23,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:23,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:23,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:23,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:23,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:23,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:23,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:23,230 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:35, output treesize:12 [2021-06-12 19:57:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:23,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030938634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:23,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:23,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:57:23,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378436519] [2021-06-12 19:57:23,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:57:23,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:23,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:57:23,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:57:23,246 INFO L87 Difference]: Start difference. First operand 329 states and 979 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:23,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:23,369 INFO L93 Difference]: Finished difference Result 413 states and 1211 transitions. [2021-06-12 19:57:23,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:23,369 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:23,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:23,370 INFO L225 Difference]: With dead ends: 413 [2021-06-12 19:57:23,370 INFO L226 Difference]: Without dead ends: 398 [2021-06-12 19:57:23,370 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 162.4ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:57:23,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-06-12 19:57:23,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 332. [2021-06-12 19:57:23,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.9939577039274923) internal successors, (991), 331 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:23,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 991 transitions. [2021-06-12 19:57:23,375 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 991 transitions. Word has length 20 [2021-06-12 19:57:23,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:23,375 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 991 transitions. [2021-06-12 19:57:23,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:23,375 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 991 transitions. [2021-06-12 19:57:23,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:23,376 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:23,376 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:23,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable427 [2021-06-12 19:57:23,591 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:23,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:23,591 INFO L82 PathProgramCache]: Analyzing trace with hash -538040384, now seen corresponding path program 143 times [2021-06-12 19:57:23,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:23,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203736828] [2021-06-12 19:57:23,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:23,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:23,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:23,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:23,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203736828] [2021-06-12 19:57:23,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203736828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:23,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416268859] [2021-06-12 19:57:23,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:23,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:23,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:23,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:23,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:23,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:23,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:23,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:23,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:23,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 19:57:23,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:23,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:23,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:23,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:23,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:23,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:23,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:23,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:23,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:23,807 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:40, output treesize:15 [2021-06-12 19:57:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:23,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416268859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:23,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:23,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:57:23,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563113150] [2021-06-12 19:57:23,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:57:23,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:23,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:57:23,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:57:23,825 INFO L87 Difference]: Start difference. First operand 332 states and 991 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:23,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:23,981 INFO L93 Difference]: Finished difference Result 407 states and 1196 transitions. [2021-06-12 19:57:23,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:23,982 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:23,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:23,982 INFO L225 Difference]: With dead ends: 407 [2021-06-12 19:57:23,982 INFO L226 Difference]: Without dead ends: 392 [2021-06-12 19:57:23,982 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 124.9ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:57:23,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-12 19:57:23,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 328. [2021-06-12 19:57:23,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.981651376146789) internal successors, (975), 327 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:23,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 975 transitions. [2021-06-12 19:57:23,986 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 975 transitions. Word has length 20 [2021-06-12 19:57:23,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:23,986 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 975 transitions. [2021-06-12 19:57:23,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:23,986 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 975 transitions. [2021-06-12 19:57:23,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:23,986 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:23,987 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:24,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-12 19:57:24,189 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:24,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:24,189 INFO L82 PathProgramCache]: Analyzing trace with hash -916485230, now seen corresponding path program 144 times [2021-06-12 19:57:24,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:24,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205157335] [2021-06-12 19:57:24,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:24,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:24,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:24,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205157335] [2021-06-12 19:57:24,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205157335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:24,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430917975] [2021-06-12 19:57:24,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:24,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:57:24,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:24,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:24,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:24,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:24,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:24,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:24,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:24,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:24,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 19:57:24,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:24,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:24,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:24,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:24,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:24,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:24,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:24,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:24,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:24,502 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:9 [2021-06-12 19:57:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:24,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430917975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:24,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:24,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:24,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566237934] [2021-06-12 19:57:24,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:24,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:24,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:24,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:24,535 INFO L87 Difference]: Start difference. First operand 328 states and 975 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:24,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:24,754 INFO L93 Difference]: Finished difference Result 486 states and 1435 transitions. [2021-06-12 19:57:24,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:57:24,755 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:24,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:24,755 INFO L225 Difference]: With dead ends: 486 [2021-06-12 19:57:24,756 INFO L226 Difference]: Without dead ends: 471 [2021-06-12 19:57:24,756 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 226.9ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:24,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-12 19:57:24,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 338. [2021-06-12 19:57:24,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9970326409495547) internal successors, (1010), 337 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:24,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1010 transitions. [2021-06-12 19:57:24,759 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1010 transitions. Word has length 20 [2021-06-12 19:57:24,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:24,759 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1010 transitions. [2021-06-12 19:57:24,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:24,760 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1010 transitions. [2021-06-12 19:57:24,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:24,760 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:24,760 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:24,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-12 19:57:24,960 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:24,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:24,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1418276566, now seen corresponding path program 145 times [2021-06-12 19:57:24,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:24,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750838296] [2021-06-12 19:57:24,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:25,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:25,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750838296] [2021-06-12 19:57:25,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750838296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:25,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369752510] [2021-06-12 19:57:25,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:25,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:25,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:25,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:25,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:25,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:25,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 19:57:25,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:25,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:25,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:25,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:25,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,233 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 19:57:25,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:25,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369752510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:25,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:25,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:25,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526517300] [2021-06-12 19:57:25,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:25,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:25,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:25,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:25,287 INFO L87 Difference]: Start difference. First operand 338 states and 1010 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:25,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:25,488 INFO L93 Difference]: Finished difference Result 457 states and 1345 transitions. [2021-06-12 19:57:25,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:57:25,488 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:25,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:25,489 INFO L225 Difference]: With dead ends: 457 [2021-06-12 19:57:25,489 INFO L226 Difference]: Without dead ends: 442 [2021-06-12 19:57:25,489 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 208.3ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:25,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-06-12 19:57:25,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 336. [2021-06-12 19:57:25,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.994029850746269) internal successors, (1003), 335 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:25,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1003 transitions. [2021-06-12 19:57:25,493 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1003 transitions. Word has length 20 [2021-06-12 19:57:25,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:25,493 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1003 transitions. [2021-06-12 19:57:25,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:25,493 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1003 transitions. [2021-06-12 19:57:25,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:25,493 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:25,493 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:25,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:25,694 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:25,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:25,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1344845586, now seen corresponding path program 146 times [2021-06-12 19:57:25,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:25,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614329280] [2021-06-12 19:57:25,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:25,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:25,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:25,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614329280] [2021-06-12 19:57:25,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614329280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:25,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126065205] [2021-06-12 19:57:25,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:25,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:25,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:25,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:25,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:25,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:25,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:25,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:25,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 19:57:25,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:25,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:25,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:25,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:25,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,960 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:12 [2021-06-12 19:57:25,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:25,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126065205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:25,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:25,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:57:25,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102348065] [2021-06-12 19:57:25,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:57:25,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:25,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:57:25,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:57:25,972 INFO L87 Difference]: Start difference. First operand 336 states and 1003 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:26,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:26,093 INFO L93 Difference]: Finished difference Result 411 states and 1208 transitions. [2021-06-12 19:57:26,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:26,097 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:26,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:26,098 INFO L225 Difference]: With dead ends: 411 [2021-06-12 19:57:26,098 INFO L226 Difference]: Without dead ends: 396 [2021-06-12 19:57:26,098 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 152.8ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:57:26,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-12 19:57:26,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 333. [2021-06-12 19:57:26,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9879518072289155) internal successors, (992), 332 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:26,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 992 transitions. [2021-06-12 19:57:26,101 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 992 transitions. Word has length 20 [2021-06-12 19:57:26,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:26,101 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 992 transitions. [2021-06-12 19:57:26,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:26,101 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 992 transitions. [2021-06-12 19:57:26,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:26,102 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:26,102 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:26,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-12 19:57:26,302 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:26,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:26,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1445819832, now seen corresponding path program 147 times [2021-06-12 19:57:26,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:26,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685174976] [2021-06-12 19:57:26,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:26,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:26,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685174976] [2021-06-12 19:57:26,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685174976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:26,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990765601] [2021-06-12 19:57:26,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:26,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:57:26,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:26,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:26,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:26,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:26,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:26,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:26,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:26,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:26,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 19:57:26,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:26,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:26,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:26,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:26,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:26,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:26,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:26,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:26,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:26,535 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:46, output treesize:15 [2021-06-12 19:57:26,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:26,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990765601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:26,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:26,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:26,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914737278] [2021-06-12 19:57:26,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:26,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:26,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:26,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:26,593 INFO L87 Difference]: Start difference. First operand 333 states and 992 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:26,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:26,801 INFO L93 Difference]: Finished difference Result 473 states and 1391 transitions. [2021-06-12 19:57:26,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:57:26,801 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:26,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:26,802 INFO L225 Difference]: With dead ends: 473 [2021-06-12 19:57:26,802 INFO L226 Difference]: Without dead ends: 458 [2021-06-12 19:57:26,802 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 196.9ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:26,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-12 19:57:26,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 332. [2021-06-12 19:57:26,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.9818731117824773) internal successors, (987), 331 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:26,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 987 transitions. [2021-06-12 19:57:26,805 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 987 transitions. Word has length 20 [2021-06-12 19:57:26,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:26,806 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 987 transitions. [2021-06-12 19:57:26,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:26,806 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 987 transitions. [2021-06-12 19:57:26,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:26,806 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:26,806 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:27,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-12 19:57:27,007 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:27,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:27,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1963107754, now seen corresponding path program 148 times [2021-06-12 19:57:27,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:27,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763669668] [2021-06-12 19:57:27,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:27,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:27,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763669668] [2021-06-12 19:57:27,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763669668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:27,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761626368] [2021-06-12 19:57:27,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:27,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:27,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:27,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:27,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:27,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:27,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:27,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:27,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:27,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:27,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:28 [2021-06-12 19:57:27,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:27,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:57:27,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:27,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:27,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:27,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:27,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:27,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:27,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:27,245 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:42, output treesize:12 [2021-06-12 19:57:27,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:27,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761626368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:27,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:27,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:57:27,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763824118] [2021-06-12 19:57:27,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:57:27,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:27,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:57:27,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:57:27,258 INFO L87 Difference]: Start difference. First operand 332 states and 987 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:27,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:27,411 INFO L93 Difference]: Finished difference Result 400 states and 1180 transitions. [2021-06-12 19:57:27,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:27,411 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:27,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:27,412 INFO L225 Difference]: With dead ends: 400 [2021-06-12 19:57:27,412 INFO L226 Difference]: Without dead ends: 385 [2021-06-12 19:57:27,412 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 136.9ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:57:27,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-06-12 19:57:27,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 329. [2021-06-12 19:57:27,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9847560975609757) internal successors, (979), 328 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:27,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 979 transitions. [2021-06-12 19:57:27,415 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 979 transitions. Word has length 20 [2021-06-12 19:57:27,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:27,415 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 979 transitions. [2021-06-12 19:57:27,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:27,415 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 979 transitions. [2021-06-12 19:57:27,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:27,416 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:27,416 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:27,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-06-12 19:57:27,616 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:27,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:27,617 INFO L82 PathProgramCache]: Analyzing trace with hash 244123072, now seen corresponding path program 149 times [2021-06-12 19:57:27,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:27,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047738850] [2021-06-12 19:57:27,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:27,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:27,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047738850] [2021-06-12 19:57:27,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047738850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:27,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414928668] [2021-06-12 19:57:27,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:27,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:57:27,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:27,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:57:27,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:27,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:27,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:27,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:27,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:27,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:27,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:31 [2021-06-12 19:57:27,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:27,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:27,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:57:27,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:27,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:27,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:57:27,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:27,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:27,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:27,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:27,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:27,856 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:27,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:27,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:27,859 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:27,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:27,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:27,891 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:101, output treesize:41 [2021-06-12 19:57:28,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:28,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414928668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:28,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:28,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:28,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773689307] [2021-06-12 19:57:28,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:28,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:28,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:28,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:28,023 INFO L87 Difference]: Start difference. First operand 329 states and 979 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:28,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:28,257 INFO L93 Difference]: Finished difference Result 426 states and 1248 transitions. [2021-06-12 19:57:28,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:57:28,257 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:28,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:28,258 INFO L225 Difference]: With dead ends: 426 [2021-06-12 19:57:28,258 INFO L226 Difference]: Without dead ends: 411 [2021-06-12 19:57:28,258 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 247.7ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:28,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-12 19:57:28,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 328. [2021-06-12 19:57:28,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.981651376146789) internal successors, (975), 327 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:28,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 975 transitions. [2021-06-12 19:57:28,261 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 975 transitions. Word has length 20 [2021-06-12 19:57:28,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:28,261 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 975 transitions. [2021-06-12 19:57:28,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:28,261 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 975 transitions. [2021-06-12 19:57:28,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:28,262 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:28,262 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:28,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-06-12 19:57:28,462 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:28,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:28,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1640510250, now seen corresponding path program 150 times [2021-06-12 19:57:28,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:28,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022417127] [2021-06-12 19:57:28,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:28,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:28,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022417127] [2021-06-12 19:57:28,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022417127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:28,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633733064] [2021-06-12 19:57:28,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:28,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:57:28,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:28,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:28,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:28,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:28,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:28,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:28,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:28,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 19:57:28,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:28,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:28,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:28,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:28,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:28,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:28,704 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:28,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:28,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:28,710 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:35, output treesize:12 [2021-06-12 19:57:28,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:28,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633733064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:28,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:28,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:57:28,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497831119] [2021-06-12 19:57:28,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:57:28,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:28,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:57:28,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:57:28,724 INFO L87 Difference]: Start difference. First operand 328 states and 975 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:28,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:28,843 INFO L93 Difference]: Finished difference Result 395 states and 1166 transitions. [2021-06-12 19:57:28,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:28,843 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:28,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:28,844 INFO L225 Difference]: With dead ends: 395 [2021-06-12 19:57:28,844 INFO L226 Difference]: Without dead ends: 380 [2021-06-12 19:57:28,844 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:57:28,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-06-12 19:57:28,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 334. [2021-06-12 19:57:28,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.990990990990991) internal successors, (996), 333 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:28,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 996 transitions. [2021-06-12 19:57:28,847 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 996 transitions. Word has length 20 [2021-06-12 19:57:28,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:28,847 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 996 transitions. [2021-06-12 19:57:28,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:28,847 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 996 transitions. [2021-06-12 19:57:28,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:28,848 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:28,848 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:29,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:29,048 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:29,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:29,048 INFO L82 PathProgramCache]: Analyzing trace with hash 310582088, now seen corresponding path program 151 times [2021-06-12 19:57:29,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:29,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996561116] [2021-06-12 19:57:29,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:29,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:29,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:29,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996561116] [2021-06-12 19:57:29,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996561116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:29,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283617375] [2021-06-12 19:57:29,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:29,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:29,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:29,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:29,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:29,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:29,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:29,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 19:57:29,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:29,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:29,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:29,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:29,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:29,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:29,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:29,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:29,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:29,298 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:40, output treesize:15 [2021-06-12 19:57:29,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:29,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283617375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:29,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:29,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:29,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016477899] [2021-06-12 19:57:29,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:29,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:29,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:29,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:29,357 INFO L87 Difference]: Start difference. First operand 334 states and 996 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:29,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:29,616 INFO L93 Difference]: Finished difference Result 459 states and 1350 transitions. [2021-06-12 19:57:29,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:57:29,616 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:29,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:29,617 INFO L225 Difference]: With dead ends: 459 [2021-06-12 19:57:29,617 INFO L226 Difference]: Without dead ends: 444 [2021-06-12 19:57:29,617 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 206.9ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:29,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-12 19:57:29,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 331. [2021-06-12 19:57:29,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.981818181818182) internal successors, (984), 330 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:29,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 984 transitions. [2021-06-12 19:57:29,621 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 984 transitions. Word has length 20 [2021-06-12 19:57:29,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:29,621 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 984 transitions. [2021-06-12 19:57:29,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:29,621 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 984 transitions. [2021-06-12 19:57:29,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:29,621 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:29,621 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:29,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-06-12 19:57:29,822 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:29,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:29,822 INFO L82 PathProgramCache]: Analyzing trace with hash -604499400, now seen corresponding path program 152 times [2021-06-12 19:57:29,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:29,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657506318] [2021-06-12 19:57:29,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:29,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:29,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:29,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657506318] [2021-06-12 19:57:29,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657506318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:29,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218516833] [2021-06-12 19:57:29,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:29,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:29,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:29,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:29,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:29,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:29,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:30,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:30,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:30,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:30,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:25 [2021-06-12 19:57:30,024 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-12 19:57:30,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:57:30,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:30,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:30,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:30,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:30,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:30,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:30,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:30,044 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:39, output treesize:15 [2021-06-12 19:57:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:30,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218516833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:30,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:30,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:30,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266118042] [2021-06-12 19:57:30,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:30,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:30,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:30,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:30,103 INFO L87 Difference]: Start difference. First operand 331 states and 984 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:30,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:30,265 INFO L93 Difference]: Finished difference Result 451 states and 1331 transitions. [2021-06-12 19:57:30,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:57:30,266 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:30,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:30,266 INFO L225 Difference]: With dead ends: 451 [2021-06-12 19:57:30,266 INFO L226 Difference]: Without dead ends: 436 [2021-06-12 19:57:30,266 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 193.0ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:30,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-12 19:57:30,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 327. [2021-06-12 19:57:30,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.98159509202454) internal successors, (972), 326 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:30,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 972 transitions. [2021-06-12 19:57:30,270 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 972 transitions. Word has length 20 [2021-06-12 19:57:30,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:30,270 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 972 transitions. [2021-06-12 19:57:30,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:30,270 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 972 transitions. [2021-06-12 19:57:30,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:30,270 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:30,270 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:30,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:30,471 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:30,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:30,471 INFO L82 PathProgramCache]: Analyzing trace with hash 988375680, now seen corresponding path program 153 times [2021-06-12 19:57:30,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:30,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144173641] [2021-06-12 19:57:30,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:30,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:30,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:30,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144173641] [2021-06-12 19:57:30,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144173641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:30,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671366119] [2021-06-12 19:57:30,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:30,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:57:30,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:30,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:30,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:30,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:30,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:30,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:30,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:30,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 19:57:30,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:30,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:30,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:30,649 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 19:57:30,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:30,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:12 [2021-06-12 19:57:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:30,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671366119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:30,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:30,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:57:30,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728831223] [2021-06-12 19:57:30,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:30,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:30,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:30,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:30,690 INFO L87 Difference]: Start difference. First operand 327 states and 972 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:30,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:30,984 INFO L93 Difference]: Finished difference Result 573 states and 1690 transitions. [2021-06-12 19:57:30,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:57:30,985 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:30,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:30,985 INFO L225 Difference]: With dead ends: 573 [2021-06-12 19:57:30,985 INFO L226 Difference]: Without dead ends: 558 [2021-06-12 19:57:30,985 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 249.1ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:57:30,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-12 19:57:30,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 330. [2021-06-12 19:57:30,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9817629179331306) internal successors, (981), 329 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:30,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 981 transitions. [2021-06-12 19:57:30,989 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 981 transitions. Word has length 20 [2021-06-12 19:57:30,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:30,989 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 981 transitions. [2021-06-12 19:57:30,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:30,990 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 981 transitions. [2021-06-12 19:57:30,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:30,990 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:30,990 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:31,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:31,191 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:31,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:31,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1178839468, now seen corresponding path program 154 times [2021-06-12 19:57:31,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:31,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227134613] [2021-06-12 19:57:31,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:31,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:31,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227134613] [2021-06-12 19:57:31,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227134613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:31,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989604135] [2021-06-12 19:57:31,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:31,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:31,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:31,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:31,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:31,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:31,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:31,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:31,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:31,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:57:31,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:31,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:31,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:31,371 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 19:57:31,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:31,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:12 [2021-06-12 19:57:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:31,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989604135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:31,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:31,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:57:31,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189369837] [2021-06-12 19:57:31,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:57:31,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:31,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:57:31,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:57:31,386 INFO L87 Difference]: Start difference. First operand 330 states and 981 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:31,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:31,563 INFO L93 Difference]: Finished difference Result 429 states and 1266 transitions. [2021-06-12 19:57:31,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:31,564 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:31,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:31,564 INFO L225 Difference]: With dead ends: 429 [2021-06-12 19:57:31,564 INFO L226 Difference]: Without dead ends: 414 [2021-06-12 19:57:31,564 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:57:31,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-12 19:57:31,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 336. [2021-06-12 19:57:31,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.991044776119403) internal successors, (1002), 335 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:31,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1002 transitions. [2021-06-12 19:57:31,568 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1002 transitions. Word has length 20 [2021-06-12 19:57:31,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:31,568 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1002 transitions. [2021-06-12 19:57:31,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:31,568 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1002 transitions. [2021-06-12 19:57:31,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:31,568 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:31,568 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:31,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-06-12 19:57:31,769 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:31,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:31,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1786199666, now seen corresponding path program 155 times [2021-06-12 19:57:31,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:31,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683585587] [2021-06-12 19:57:31,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:31,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:31,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683585587] [2021-06-12 19:57:31,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683585587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:31,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198986313] [2021-06-12 19:57:31,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:31,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:57:31,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:31,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:31,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:31,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:31,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:31,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:31,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:31,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:57:31,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:31,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:31,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:31,975 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 19:57:31,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:31,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:15 [2021-06-12 19:57:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:32,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198986313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:32,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:32,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:57:32,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112481639] [2021-06-12 19:57:32,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:32,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:32,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:32,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:32,031 INFO L87 Difference]: Start difference. First operand 336 states and 1002 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:32,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:32,208 INFO L93 Difference]: Finished difference Result 494 states and 1453 transitions. [2021-06-12 19:57:32,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:57:32,208 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:32,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:32,209 INFO L225 Difference]: With dead ends: 494 [2021-06-12 19:57:32,209 INFO L226 Difference]: Without dead ends: 479 [2021-06-12 19:57:32,209 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 189.1ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:32,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-06-12 19:57:32,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 333. [2021-06-12 19:57:32,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9819277108433737) internal successors, (990), 332 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:32,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 990 transitions. [2021-06-12 19:57:32,213 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 990 transitions. Word has length 20 [2021-06-12 19:57:32,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:32,213 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 990 transitions. [2021-06-12 19:57:32,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:32,213 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 990 transitions. [2021-06-12 19:57:32,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:32,213 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:32,213 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:32,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:32,414 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:32,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:32,414 INFO L82 PathProgramCache]: Analyzing trace with hash 871118178, now seen corresponding path program 156 times [2021-06-12 19:57:32,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:32,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462770858] [2021-06-12 19:57:32,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:32,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:32,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:32,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462770858] [2021-06-12 19:57:32,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462770858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:32,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601245906] [2021-06-12 19:57:32,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:32,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:57:32,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:32,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:32,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:32,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:32,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:32,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:32,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:32,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-06-12 19:57:32,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:57:32,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:32,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:32,589 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:32,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:32,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:15 [2021-06-12 19:57:32,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:32,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601245906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:32,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:32,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:57:32,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692654712] [2021-06-12 19:57:32,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:32,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:32,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:32,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:32,646 INFO L87 Difference]: Start difference. First operand 333 states and 990 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:32,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:32,856 INFO L93 Difference]: Finished difference Result 486 states and 1434 transitions. [2021-06-12 19:57:32,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:57:32,856 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:32,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:32,857 INFO L225 Difference]: With dead ends: 486 [2021-06-12 19:57:32,857 INFO L226 Difference]: Without dead ends: 471 [2021-06-12 19:57:32,857 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 174.1ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:32,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-12 19:57:32,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 326. [2021-06-12 19:57:32,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9815384615384617) internal successors, (969), 325 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:32,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 969 transitions. [2021-06-12 19:57:32,866 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 969 transitions. Word has length 20 [2021-06-12 19:57:32,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:32,866 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 969 transitions. [2021-06-12 19:57:32,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:32,866 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 969 transitions. [2021-06-12 19:57:32,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:32,867 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:32,867 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:33,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:33,067 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:33,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:33,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1075844112, now seen corresponding path program 157 times [2021-06-12 19:57:33,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:33,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060618740] [2021-06-12 19:57:33,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:33,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:33,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:33,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060618740] [2021-06-12 19:57:33,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060618740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:33,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632655753] [2021-06-12 19:57:33,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:33,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:33,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:33,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:33,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:33,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:33,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:33,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:33,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:33,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 19:57:33,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:33,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:33,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:33,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:33,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:33,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:33,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:33,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:33,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:33,351 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:9 [2021-06-12 19:57:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:33,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632655753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:33,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:33,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:33,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972771976] [2021-06-12 19:57:33,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:33,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:33,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:33,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:33,378 INFO L87 Difference]: Start difference. First operand 326 states and 969 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:33,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:33,767 INFO L93 Difference]: Finished difference Result 492 states and 1453 transitions. [2021-06-12 19:57:33,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:57:33,767 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:33,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:33,768 INFO L225 Difference]: With dead ends: 492 [2021-06-12 19:57:33,768 INFO L226 Difference]: Without dead ends: 477 [2021-06-12 19:57:33,768 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 308.9ms TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:57:33,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-06-12 19:57:33,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 331. [2021-06-12 19:57:33,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.984848484848485) internal successors, (985), 330 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:33,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 985 transitions. [2021-06-12 19:57:33,772 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 985 transitions. Word has length 20 [2021-06-12 19:57:33,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:33,772 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 985 transitions. [2021-06-12 19:57:33,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:33,772 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 985 transitions. [2021-06-12 19:57:33,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:33,772 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:33,772 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:33,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:33,973 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:33,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:33,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1577635448, now seen corresponding path program 158 times [2021-06-12 19:57:33,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:33,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613497935] [2021-06-12 19:57:33,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:34,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:34,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:34,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613497935] [2021-06-12 19:57:34,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613497935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:34,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114473095] [2021-06-12 19:57:34,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:34,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:34,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:34,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:34,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:34,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:34,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:34,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:34,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:34,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:34,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 19:57:34,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:34,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:34,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:34,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:34,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:34,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:34,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:34,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:34,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:34,231 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:12 [2021-06-12 19:57:34,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:34,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114473095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:34,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:34,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:34,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023255141] [2021-06-12 19:57:34,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:34,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:34,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:34,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:34,273 INFO L87 Difference]: Start difference. First operand 331 states and 985 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:34,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:34,604 INFO L93 Difference]: Finished difference Result 498 states and 1466 transitions. [2021-06-12 19:57:34,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:57:34,604 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:34,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:34,604 INFO L225 Difference]: With dead ends: 498 [2021-06-12 19:57:34,605 INFO L226 Difference]: Without dead ends: 483 [2021-06-12 19:57:34,605 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 308.2ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:57:34,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-06-12 19:57:34,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 329. [2021-06-12 19:57:34,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:34,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-06-12 19:57:34,608 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 20 [2021-06-12 19:57:34,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:34,608 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-06-12 19:57:34,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:34,608 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-06-12 19:57:34,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:34,609 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:34,609 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:34,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable467 [2021-06-12 19:57:34,809 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:34,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:34,810 INFO L82 PathProgramCache]: Analyzing trace with hash 610547728, now seen corresponding path program 159 times [2021-06-12 19:57:34,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:34,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444559220] [2021-06-12 19:57:34,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:34,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:34,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:34,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444559220] [2021-06-12 19:57:34,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444559220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:34,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778108092] [2021-06-12 19:57:34,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:34,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:57:34,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:34,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:34,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:35,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:35,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:35,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:35,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:35,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 19:57:35,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:35,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:35,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:35,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:35,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:35,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:35,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:35,068 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:12 [2021-06-12 19:57:35,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:35,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778108092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:35,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:35,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:35,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467229725] [2021-06-12 19:57:35,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:35,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:35,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:35,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:35,114 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:35,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:35,435 INFO L93 Difference]: Finished difference Result 465 states and 1373 transitions. [2021-06-12 19:57:35,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:57:35,435 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:35,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:35,436 INFO L225 Difference]: With dead ends: 465 [2021-06-12 19:57:35,436 INFO L226 Difference]: Without dead ends: 450 [2021-06-12 19:57:35,436 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 253.8ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:35,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-12 19:57:35,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 327. [2021-06-12 19:57:35,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9846625766871164) internal successors, (973), 326 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:35,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 973 transitions. [2021-06-12 19:57:35,439 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 973 transitions. Word has length 20 [2021-06-12 19:57:35,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:35,439 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 973 transitions. [2021-06-12 19:57:35,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:35,440 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 973 transitions. [2021-06-12 19:57:35,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:35,440 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:35,440 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:35,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:35,640 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:35,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:35,641 INFO L82 PathProgramCache]: Analyzing trace with hash 646055826, now seen corresponding path program 160 times [2021-06-12 19:57:35,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:35,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482523388] [2021-06-12 19:57:35,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:35,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:35,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:35,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482523388] [2021-06-12 19:57:35,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482523388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:35,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212271709] [2021-06-12 19:57:35,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:35,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:35,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:35,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:35,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:35,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:35,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:35,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:35,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:35,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 19:57:35,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:35,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:35,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:35,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:35,915 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:35,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:35,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:35,922 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:9 [2021-06-12 19:57:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:35,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212271709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:35,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:35,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:57:35,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62991477] [2021-06-12 19:57:35,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:57:35,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:35,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:57:35,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:57:35,931 INFO L87 Difference]: Start difference. First operand 327 states and 973 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:36,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:36,085 INFO L93 Difference]: Finished difference Result 414 states and 1213 transitions. [2021-06-12 19:57:36,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:36,086 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:36,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:36,086 INFO L225 Difference]: With dead ends: 414 [2021-06-12 19:57:36,086 INFO L226 Difference]: Without dead ends: 399 [2021-06-12 19:57:36,086 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 153.9ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:57:36,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-12 19:57:36,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 333. [2021-06-12 19:57:36,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.0) internal successors, (996), 332 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:36,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 996 transitions. [2021-06-12 19:57:36,090 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 996 transitions. Word has length 20 [2021-06-12 19:57:36,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:36,090 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 996 transitions. [2021-06-12 19:57:36,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:36,090 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 996 transitions. [2021-06-12 19:57:36,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:36,091 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:36,091 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:36,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-06-12 19:57:36,291 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:36,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:36,291 INFO L82 PathProgramCache]: Analyzing trace with hash 144264490, now seen corresponding path program 161 times [2021-06-12 19:57:36,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:36,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43121778] [2021-06-12 19:57:36,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:36,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:36,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:36,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43121778] [2021-06-12 19:57:36,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43121778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:36,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640940807] [2021-06-12 19:57:36,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:36,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:36,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:36,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:36,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:36,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:36,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:36,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:36,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:36,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:36,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 19:57:36,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:36,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:36,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:36,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:36,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:36,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:36,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:36,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:36,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:36,534 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:12 [2021-06-12 19:57:36,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:36,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640940807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:36,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:36,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:57:36,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897900554] [2021-06-12 19:57:36,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:57:36,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:36,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:57:36,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:57:36,548 INFO L87 Difference]: Start difference. First operand 333 states and 996 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:36,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:36,686 INFO L93 Difference]: Finished difference Result 408 states and 1200 transitions. [2021-06-12 19:57:36,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:36,686 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:36,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:36,687 INFO L225 Difference]: With dead ends: 408 [2021-06-12 19:57:36,687 INFO L226 Difference]: Without dead ends: 393 [2021-06-12 19:57:36,687 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 139.2ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:57:36,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-12 19:57:36,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 331. [2021-06-12 19:57:36,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.996969696969697) internal successors, (989), 330 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:36,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 989 transitions. [2021-06-12 19:57:36,690 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 989 transitions. Word has length 20 [2021-06-12 19:57:36,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:36,691 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 989 transitions. [2021-06-12 19:57:36,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:36,691 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 989 transitions. [2021-06-12 19:57:36,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:36,691 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:36,691 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:36,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable474,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:36,892 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:36,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:36,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1387580654, now seen corresponding path program 162 times [2021-06-12 19:57:36,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:36,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080073720] [2021-06-12 19:57:36,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:36,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:37,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:37,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080073720] [2021-06-12 19:57:37,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080073720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:37,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926484056] [2021-06-12 19:57:37,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:37,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:57:37,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:37,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:37,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:37,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:37,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:37,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:37,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 19:57:37,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:37,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:37,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:37,156 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:37,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,165 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 19:57:37,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:37,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926484056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:37,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:37,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:37,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468719373] [2021-06-12 19:57:37,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:37,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:37,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:37,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:37,209 INFO L87 Difference]: Start difference. First operand 331 states and 989 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:37,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:37,577 INFO L93 Difference]: Finished difference Result 504 states and 1483 transitions. [2021-06-12 19:57:37,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:57:37,577 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:37,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:37,578 INFO L225 Difference]: With dead ends: 504 [2021-06-12 19:57:37,578 INFO L226 Difference]: Without dead ends: 489 [2021-06-12 19:57:37,578 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 314.4ms TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:57:37,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-12 19:57:37,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 328. [2021-06-12 19:57:37,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9908256880733943) internal successors, (978), 327 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:37,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 978 transitions. [2021-06-12 19:57:37,584 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 978 transitions. Word has length 20 [2021-06-12 19:57:37,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:37,584 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 978 transitions. [2021-06-12 19:57:37,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:37,584 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 978 transitions. [2021-06-12 19:57:37,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:37,585 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:37,585 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:37,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-06-12 19:57:37,801 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:37,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:37,801 INFO L82 PathProgramCache]: Analyzing trace with hash 116721224, now seen corresponding path program 163 times [2021-06-12 19:57:37,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:37,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004472517] [2021-06-12 19:57:37,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:37,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:37,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:37,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004472517] [2021-06-12 19:57:37,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004472517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:37,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913605433] [2021-06-12 19:57:37,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:37,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:37,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:37,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:37,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:37,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:37,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:37,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 19:57:38,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:38,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:38,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:38,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:38,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:38,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:38,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:38,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:38,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:38,037 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:46, output treesize:15 [2021-06-12 19:57:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:38,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913605433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:38,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:38,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:57:38,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868200123] [2021-06-12 19:57:38,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:57:38,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:38,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:57:38,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:57:38,057 INFO L87 Difference]: Start difference. First operand 328 states and 978 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:38,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:38,167 INFO L93 Difference]: Finished difference Result 416 states and 1222 transitions. [2021-06-12 19:57:38,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:38,168 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:38,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:38,168 INFO L225 Difference]: With dead ends: 416 [2021-06-12 19:57:38,168 INFO L226 Difference]: Without dead ends: 401 [2021-06-12 19:57:38,168 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:57:38,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-12 19:57:38,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 327. [2021-06-12 19:57:38,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9846625766871164) internal successors, (973), 326 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:38,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 973 transitions. [2021-06-12 19:57:38,172 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 973 transitions. Word has length 20 [2021-06-12 19:57:38,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:38,172 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 973 transitions. [2021-06-12 19:57:38,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:38,172 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 973 transitions. [2021-06-12 19:57:38,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:38,172 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:38,172 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:38,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable480 [2021-06-12 19:57:38,373 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:38,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:38,373 INFO L82 PathProgramCache]: Analyzing trace with hash -243293518, now seen corresponding path program 164 times [2021-06-12 19:57:38,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:38,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113385798] [2021-06-12 19:57:38,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:38,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:38,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:38,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113385798] [2021-06-12 19:57:38,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113385798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:38,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839566790] [2021-06-12 19:57:38,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:38,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:38,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:38,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:38,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:38,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:38,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:38,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:38,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:38,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:38,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 19:57:38,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:38,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:38,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:38,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:38,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:38,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:38,630 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:38,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:38,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:38,639 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:12 [2021-06-12 19:57:38,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:38,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839566790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:38,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:38,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:38,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618063372] [2021-06-12 19:57:38,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:38,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:38,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:38,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:38,683 INFO L87 Difference]: Start difference. First operand 327 states and 973 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:39,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:39,057 INFO L93 Difference]: Finished difference Result 483 states and 1418 transitions. [2021-06-12 19:57:39,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:57:39,058 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:39,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:39,058 INFO L225 Difference]: With dead ends: 483 [2021-06-12 19:57:39,058 INFO L226 Difference]: Without dead ends: 468 [2021-06-12 19:57:39,059 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 268.1ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:39,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-06-12 19:57:39,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 330. [2021-06-12 19:57:39,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9939209726443767) internal successors, (985), 329 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:39,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 985 transitions. [2021-06-12 19:57:39,062 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 985 transitions. Word has length 20 [2021-06-12 19:57:39,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:39,062 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 985 transitions. [2021-06-12 19:57:39,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:39,062 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 985 transitions. [2021-06-12 19:57:39,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:39,063 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:39,063 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:39,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:39,263 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:39,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:39,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1573221680, now seen corresponding path program 165 times [2021-06-12 19:57:39,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:39,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146460221] [2021-06-12 19:57:39,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:39,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:39,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146460221] [2021-06-12 19:57:39,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146460221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:39,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917740342] [2021-06-12 19:57:39,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:39,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:57:39,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:39,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:39,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:39,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:39,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:39,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:39,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:39,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:39,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 19:57:39,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:39,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:39,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:39,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:39,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:39,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:39,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:39,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:39,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:39,532 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:46, output treesize:15 [2021-06-12 19:57:39,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:39,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917740342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:39,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:39,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:39,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270918420] [2021-06-12 19:57:39,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:39,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:39,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:39,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:39,599 INFO L87 Difference]: Start difference. First operand 330 states and 985 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:39,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:39,981 INFO L93 Difference]: Finished difference Result 477 states and 1403 transitions. [2021-06-12 19:57:39,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:57:39,981 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:39,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:39,982 INFO L225 Difference]: With dead ends: 477 [2021-06-12 19:57:39,982 INFO L226 Difference]: Without dead ends: 462 [2021-06-12 19:57:39,982 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 280.1ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:39,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-12 19:57:39,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 326. [2021-06-12 19:57:39,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9815384615384617) internal successors, (969), 325 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:39,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 969 transitions. [2021-06-12 19:57:39,986 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 969 transitions. Word has length 20 [2021-06-12 19:57:39,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:39,986 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 969 transitions. [2021-06-12 19:57:39,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:39,986 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 969 transitions. [2021-06-12 19:57:39,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:39,986 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:39,986 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:40,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:40,187 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:40,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:40,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1951666526, now seen corresponding path program 166 times [2021-06-12 19:57:40,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:40,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984474235] [2021-06-12 19:57:40,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:40,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:40,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984474235] [2021-06-12 19:57:40,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984474235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:40,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608294053] [2021-06-12 19:57:40,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:40,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:40,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:40,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:40,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:40,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:40,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:40,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:40,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:40,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:40,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-06-12 19:57:40,434 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_4]} [2021-06-12 19:57:40,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:40,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:40,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:40,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:40,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:40,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:40,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:40,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:40,453 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:9 [2021-06-12 19:57:40,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:40,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608294053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:40,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:40,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:40,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413845918] [2021-06-12 19:57:40,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:40,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:40,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:40,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:40,503 INFO L87 Difference]: Start difference. First operand 326 states and 969 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:40,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:40,779 INFO L93 Difference]: Finished difference Result 484 states and 1429 transitions. [2021-06-12 19:57:40,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:57:40,779 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:40,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:40,780 INFO L225 Difference]: With dead ends: 484 [2021-06-12 19:57:40,780 INFO L226 Difference]: Without dead ends: 469 [2021-06-12 19:57:40,780 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 237.7ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:57:40,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-12 19:57:40,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 336. [2021-06-12 19:57:40,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.997014925373134) internal successors, (1004), 335 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:40,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1004 transitions. [2021-06-12 19:57:40,784 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1004 transitions. Word has length 20 [2021-06-12 19:57:40,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:40,784 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1004 transitions. [2021-06-12 19:57:40,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:40,784 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1004 transitions. [2021-06-12 19:57:40,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:40,785 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:40,785 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:40,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:40,989 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:40,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:40,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1841509434, now seen corresponding path program 167 times [2021-06-12 19:57:40,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:40,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793997691] [2021-06-12 19:57:40,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:41,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:41,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793997691] [2021-06-12 19:57:41,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793997691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:41,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842331281] [2021-06-12 19:57:41,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:41,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:57:41,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:41,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:57:41,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:41,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:41,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:41,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:41,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:41,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:41,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:41,195 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:41,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:41,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:41,224 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:77, output treesize:63 [2021-06-12 19:57:41,302 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_4]} [2021-06-12 19:57:41,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 19:57:41,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:41,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:41,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:41,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:41,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:41,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:41,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-06-12 19:57:41,331 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:41,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:41,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:41,333 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:41,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:41,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:41,352 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:87, output treesize:33 [2021-06-12 19:57:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:41,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842331281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:41,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:41,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:41,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334604499] [2021-06-12 19:57:41,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:41,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:41,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:41,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:41,433 INFO L87 Difference]: Start difference. First operand 336 states and 1004 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:41,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:41,777 INFO L93 Difference]: Finished difference Result 462 states and 1364 transitions. [2021-06-12 19:57:41,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:57:41,777 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:41,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:41,778 INFO L225 Difference]: With dead ends: 462 [2021-06-12 19:57:41,778 INFO L226 Difference]: Without dead ends: 447 [2021-06-12 19:57:41,778 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 345.0ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:57:41,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-12 19:57:41,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 334. [2021-06-12 19:57:41,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.993993993993994) internal successors, (997), 333 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:41,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 997 transitions. [2021-06-12 19:57:41,781 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 997 transitions. Word has length 20 [2021-06-12 19:57:41,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:41,782 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 997 transitions. [2021-06-12 19:57:41,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:41,782 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 997 transitions. [2021-06-12 19:57:41,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:41,782 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:41,782 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:41,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-06-12 19:57:41,983 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:41,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:41,983 INFO L82 PathProgramCache]: Analyzing trace with hash 309664290, now seen corresponding path program 168 times [2021-06-12 19:57:41,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:41,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165242870] [2021-06-12 19:57:41,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:41,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:42,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:42,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165242870] [2021-06-12 19:57:42,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165242870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:42,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934618265] [2021-06-12 19:57:42,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:42,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:57:42,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:42,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:42,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:42,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:42,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:42,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:42,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:42,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:42,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 19:57:42,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:42,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:42,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:42,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:42,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:42,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:42,241 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:42,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:42,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:42,249 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:12 [2021-06-12 19:57:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:42,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934618265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:42,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:42,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:57:42,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891286564] [2021-06-12 19:57:42,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:57:42,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:42,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:57:42,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:57:42,262 INFO L87 Difference]: Start difference. First operand 334 states and 997 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:42,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:42,388 INFO L93 Difference]: Finished difference Result 407 states and 1196 transitions. [2021-06-12 19:57:42,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:42,388 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:42,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:42,388 INFO L225 Difference]: With dead ends: 407 [2021-06-12 19:57:42,389 INFO L226 Difference]: Without dead ends: 392 [2021-06-12 19:57:42,389 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 144.3ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:57:42,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-12 19:57:42,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 331. [2021-06-12 19:57:42,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.987878787878788) internal successors, (986), 330 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:42,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 986 transitions. [2021-06-12 19:57:42,392 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 986 transitions. Word has length 20 [2021-06-12 19:57:42,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:42,392 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 986 transitions. [2021-06-12 19:57:42,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:42,392 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 986 transitions. [2021-06-12 19:57:42,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:42,392 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:42,392 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:42,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-12 19:57:42,593 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:42,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:42,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1813966168, now seen corresponding path program 169 times [2021-06-12 19:57:42,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:42,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073308779] [2021-06-12 19:57:42,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:42,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:42,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073308779] [2021-06-12 19:57:42,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073308779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:42,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929060730] [2021-06-12 19:57:42,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:42,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:42,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:42,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:42,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:42,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:42,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:42,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:42,817 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 19:57:42,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:42,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:42,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:42,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:42,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:42,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:42,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:42,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:42,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:42,877 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:45, output treesize:15 [2021-06-12 19:57:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:42,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929060730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:42,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:42,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:57:42,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282113242] [2021-06-12 19:57:42,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:57:42,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:42,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:57:42,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:57:42,906 INFO L87 Difference]: Start difference. First operand 331 states and 986 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:43,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:43,044 INFO L93 Difference]: Finished difference Result 417 states and 1225 transitions. [2021-06-12 19:57:43,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:43,044 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:43,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:43,045 INFO L225 Difference]: With dead ends: 417 [2021-06-12 19:57:43,045 INFO L226 Difference]: Without dead ends: 402 [2021-06-12 19:57:43,045 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 165.1ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:57:43,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-12 19:57:43,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 330. [2021-06-12 19:57:43,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9817629179331306) internal successors, (981), 329 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:43,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 981 transitions. [2021-06-12 19:57:43,048 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 981 transitions. Word has length 20 [2021-06-12 19:57:43,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:43,048 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 981 transitions. [2021-06-12 19:57:43,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:43,048 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 981 transitions. [2021-06-12 19:57:43,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:43,049 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:43,049 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:43,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-06-12 19:57:43,249 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:43,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:43,249 INFO L82 PathProgramCache]: Analyzing trace with hash 927926458, now seen corresponding path program 170 times [2021-06-12 19:57:43,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:43,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787246610] [2021-06-12 19:57:43,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:43,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:43,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787246610] [2021-06-12 19:57:43,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787246610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:43,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72639465] [2021-06-12 19:57:43,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:43,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:43,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:43,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:43,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:43,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:43,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:43,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:43,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:43,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:25 [2021-06-12 19:57:43,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:43,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:57:43,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:43,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:43,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:43,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:43,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:43,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:43,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:43,481 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:12 [2021-06-12 19:57:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:43,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72639465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:43,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:43,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:57:43,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480746388] [2021-06-12 19:57:43,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:57:43,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:43,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:57:43,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:57:43,498 INFO L87 Difference]: Start difference. First operand 330 states and 981 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:43,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:43,613 INFO L93 Difference]: Finished difference Result 396 states and 1168 transitions. [2021-06-12 19:57:43,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:43,613 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:43,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:43,614 INFO L225 Difference]: With dead ends: 396 [2021-06-12 19:57:43,614 INFO L226 Difference]: Without dead ends: 381 [2021-06-12 19:57:43,614 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 140.5ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:57:43,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-12 19:57:43,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 327. [2021-06-12 19:57:43,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9846625766871164) internal successors, (973), 326 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:43,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 973 transitions. [2021-06-12 19:57:43,617 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 973 transitions. Word has length 20 [2021-06-12 19:57:43,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:43,617 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 973 transitions. [2021-06-12 19:57:43,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:43,617 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 973 transitions. [2021-06-12 19:57:43,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:43,618 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:43,618 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:43,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable504 [2021-06-12 19:57:43,837 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:43,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:43,837 INFO L82 PathProgramCache]: Analyzing trace with hash -791058224, now seen corresponding path program 171 times [2021-06-12 19:57:43,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:43,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631880933] [2021-06-12 19:57:43,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:43,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:43,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:43,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631880933] [2021-06-12 19:57:43,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631880933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:43,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895319524] [2021-06-12 19:57:43,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:43,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:57:43,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:43,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:43,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:44,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:44,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:44,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:44,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:44,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:30 [2021-06-12 19:57:44,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:44,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:57:44,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:44,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:44,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:44,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:44,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:44,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:44,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:44,077 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:39, output treesize:15 [2021-06-12 19:57:44,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:44,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895319524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:44,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:44,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:44,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134847371] [2021-06-12 19:57:44,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:44,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:44,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:44,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:44,135 INFO L87 Difference]: Start difference. First operand 327 states and 973 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:44,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:44,400 INFO L93 Difference]: Finished difference Result 476 states and 1396 transitions. [2021-06-12 19:57:44,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:57:44,401 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:44,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:44,401 INFO L225 Difference]: With dead ends: 476 [2021-06-12 19:57:44,401 INFO L226 Difference]: Without dead ends: 461 [2021-06-12 19:57:44,402 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 220.4ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:57:44,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-06-12 19:57:44,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 326. [2021-06-12 19:57:44,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9815384615384617) internal successors, (969), 325 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:44,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 969 transitions. [2021-06-12 19:57:44,405 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 969 transitions. Word has length 20 [2021-06-12 19:57:44,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:44,405 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 969 transitions. [2021-06-12 19:57:44,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:44,405 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 969 transitions. [2021-06-12 19:57:44,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:44,406 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:44,406 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:44,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:44,606 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:44,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:44,607 INFO L82 PathProgramCache]: Analyzing trace with hash 605328954, now seen corresponding path program 172 times [2021-06-12 19:57:44,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:44,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349750073] [2021-06-12 19:57:44,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:44,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:44,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:44,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:44,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349750073] [2021-06-12 19:57:44,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349750073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:44,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345644605] [2021-06-12 19:57:44,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:44,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:44,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:44,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:44,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:44,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:44,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:44,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:44,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:44,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:44,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 19:57:44,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:44,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:44,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:44,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:44,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:44,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:44,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:44,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:44,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:44,851 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:45, output treesize:12 [2021-06-12 19:57:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:44,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345644605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:44,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:44,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:57:44,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688521780] [2021-06-12 19:57:44,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:57:44,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:44,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:57:44,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:57:44,871 INFO L87 Difference]: Start difference. First operand 326 states and 969 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:45,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:45,042 INFO L93 Difference]: Finished difference Result 391 states and 1154 transitions. [2021-06-12 19:57:45,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:45,043 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:45,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:45,043 INFO L225 Difference]: With dead ends: 391 [2021-06-12 19:57:45,043 INFO L226 Difference]: Without dead ends: 376 [2021-06-12 19:57:45,043 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:57:45,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-12 19:57:45,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 332. [2021-06-12 19:57:45,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.990936555891239) internal successors, (990), 331 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:45,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 990 transitions. [2021-06-12 19:57:45,047 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 990 transitions. Word has length 20 [2021-06-12 19:57:45,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:45,047 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 990 transitions. [2021-06-12 19:57:45,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:45,047 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 990 transitions. [2021-06-12 19:57:45,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:45,048 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:45,048 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:45,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:45,248 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:45,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:45,248 INFO L82 PathProgramCache]: Analyzing trace with hash -724599208, now seen corresponding path program 173 times [2021-06-12 19:57:45,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:45,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877748390] [2021-06-12 19:57:45,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:45,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:45,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:45,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877748390] [2021-06-12 19:57:45,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877748390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:45,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588135383] [2021-06-12 19:57:45,368 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:45,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:57:45,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:45,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:57:45,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:45,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:45,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:45,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:45,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:45,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:45,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:45,463 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:77, output treesize:63 [2021-06-12 19:57:45,507 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_0]} [2021-06-12 19:57:45,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:45,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:45,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:45,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:45,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:45,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:45,547 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:45,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:45,550 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:45,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:45,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:45,576 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:91, output treesize:41 [2021-06-12 19:57:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:45,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588135383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:45,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:45,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:45,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463523575] [2021-06-12 19:57:45,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:45,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:45,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:45,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:45,679 INFO L87 Difference]: Start difference. First operand 332 states and 990 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:46,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:46,043 INFO L93 Difference]: Finished difference Result 474 states and 1407 transitions. [2021-06-12 19:57:46,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:57:46,044 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:46,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:46,044 INFO L225 Difference]: With dead ends: 474 [2021-06-12 19:57:46,044 INFO L226 Difference]: Without dead ends: 459 [2021-06-12 19:57:46,044 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 339.7ms TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:57:46,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-06-12 19:57:46,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 329. [2021-06-12 19:57:46,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:46,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-06-12 19:57:46,048 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 20 [2021-06-12 19:57:46,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:46,048 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-06-12 19:57:46,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:46,048 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-06-12 19:57:46,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:46,048 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:46,049 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:46,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-06-12 19:57:46,249 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:46,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:46,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1639680696, now seen corresponding path program 174 times [2021-06-12 19:57:46,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:46,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95896634] [2021-06-12 19:57:46,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:46,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:46,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:46,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95896634] [2021-06-12 19:57:46,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95896634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:46,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840926339] [2021-06-12 19:57:46,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:46,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:57:46,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:46,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:46,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:46,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:46,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:46,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:46,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:46,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:30 [2021-06-12 19:57:46,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:46,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:57:46,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:46,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:46,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:46,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-12 19:57:46,479 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:46,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:46,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:46,486 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:39, output treesize:15 [2021-06-12 19:57:46,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:46,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840926339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:46,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:46,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:46,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976791450] [2021-06-12 19:57:46,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:46,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:46,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:46,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:46,549 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:46,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:46,794 INFO L93 Difference]: Finished difference Result 449 states and 1325 transitions. [2021-06-12 19:57:46,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:57:46,795 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:46,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:46,795 INFO L225 Difference]: With dead ends: 449 [2021-06-12 19:57:46,795 INFO L226 Difference]: Without dead ends: 434 [2021-06-12 19:57:46,795 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 206.1ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:57:46,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-06-12 19:57:46,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 325. [2021-06-12 19:57:46,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9814814814814814) internal successors, (966), 324 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:46,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 966 transitions. [2021-06-12 19:57:46,799 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 966 transitions. Word has length 20 [2021-06-12 19:57:46,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:46,799 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 966 transitions. [2021-06-12 19:57:46,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:46,799 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 966 transitions. [2021-06-12 19:57:46,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:46,799 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:46,799 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:47,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable517 [2021-06-12 19:57:47,000 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:47,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:47,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1136429620, now seen corresponding path program 175 times [2021-06-12 19:57:47,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:47,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870153343] [2021-06-12 19:57:47,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:47,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:47,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:47,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870153343] [2021-06-12 19:57:47,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870153343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:47,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687483824] [2021-06-12 19:57:47,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:47,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:47,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:47,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:47,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:47,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:47,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:47,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:57:47,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:47,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:47,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:47,200 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:47,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:47,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:9 [2021-06-12 19:57:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:47,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687483824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:47,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:47,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:57:47,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786065004] [2021-06-12 19:57:47,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:47,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:47,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:47,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:47,225 INFO L87 Difference]: Start difference. First operand 325 states and 966 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:47,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:47,509 INFO L93 Difference]: Finished difference Result 516 states and 1525 transitions. [2021-06-12 19:57:47,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:57:47,510 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:47,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:47,510 INFO L225 Difference]: With dead ends: 516 [2021-06-12 19:57:47,510 INFO L226 Difference]: Without dead ends: 501 [2021-06-12 19:57:47,510 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 227.8ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:47,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-12 19:57:47,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 342. [2021-06-12 19:57:47,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.997067448680352) internal successors, (1022), 341 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:47,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1022 transitions. [2021-06-12 19:57:47,515 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1022 transitions. Word has length 20 [2021-06-12 19:57:47,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:47,515 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1022 transitions. [2021-06-12 19:57:47,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:47,515 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1022 transitions. [2021-06-12 19:57:47,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:47,515 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:47,516 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:47,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable518 [2021-06-12 19:57:47,729 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:47,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:47,729 INFO L82 PathProgramCache]: Analyzing trace with hash 634638284, now seen corresponding path program 176 times [2021-06-12 19:57:47,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:47,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800349522] [2021-06-12 19:57:47,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:47,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:47,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800349522] [2021-06-12 19:57:47,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800349522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:47,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952466922] [2021-06-12 19:57:47,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:47,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:47,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:47,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:47,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:47,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:47,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:47,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:47,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:47,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:57:47,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:47,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:47,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:47,914 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:47,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:47,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:12 [2021-06-12 19:57:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:47,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952466922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:47,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:47,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:57:47,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753865985] [2021-06-12 19:57:47,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:47,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:47,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:47,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:47,954 INFO L87 Difference]: Start difference. First operand 342 states and 1022 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:48,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:48,260 INFO L93 Difference]: Finished difference Result 506 states and 1491 transitions. [2021-06-12 19:57:48,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:57:48,261 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:48,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:48,261 INFO L225 Difference]: With dead ends: 506 [2021-06-12 19:57:48,261 INFO L226 Difference]: Without dead ends: 491 [2021-06-12 19:57:48,261 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 222.3ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:48,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-12 19:57:48,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 340. [2021-06-12 19:57:48,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.994100294985251) internal successors, (1015), 339 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:48,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1015 transitions. [2021-06-12 19:57:48,267 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1015 transitions. Word has length 20 [2021-06-12 19:57:48,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:48,267 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1015 transitions. [2021-06-12 19:57:48,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:48,267 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1015 transitions. [2021-06-12 19:57:48,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:48,267 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:48,268 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:48,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:48,490 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:48,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:48,490 INFO L82 PathProgramCache]: Analyzing trace with hash -897206860, now seen corresponding path program 177 times [2021-06-12 19:57:48,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:48,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812240954] [2021-06-12 19:57:48,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:48,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:48,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:48,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812240954] [2021-06-12 19:57:48,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812240954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:48,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852985073] [2021-06-12 19:57:48,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:48,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:57:48,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:48,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:48,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:48,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:48,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:48,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:48,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:48,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:57:48,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:48,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:48,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:48,682 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:48,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:48,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:12 [2021-06-12 19:57:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:48,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852985073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:48,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:48,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:57:48,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266893341] [2021-06-12 19:57:48,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:57:48,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:48,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:57:48,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:57:48,694 INFO L87 Difference]: Start difference. First operand 340 states and 1015 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:48,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:48,839 INFO L93 Difference]: Finished difference Result 441 states and 1298 transitions. [2021-06-12 19:57:48,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:48,840 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:48,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:48,840 INFO L225 Difference]: With dead ends: 441 [2021-06-12 19:57:48,840 INFO L226 Difference]: Without dead ends: 426 [2021-06-12 19:57:48,840 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:57:48,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-06-12 19:57:48,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 337. [2021-06-12 19:57:48,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.988095238095238) internal successors, (1004), 336 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:48,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1004 transitions. [2021-06-12 19:57:48,844 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1004 transitions. Word has length 20 [2021-06-12 19:57:48,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:48,844 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1004 transitions. [2021-06-12 19:57:48,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:48,844 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1004 transitions. [2021-06-12 19:57:48,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:48,844 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:48,844 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:49,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-06-12 19:57:49,045 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:49,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:49,045 INFO L82 PathProgramCache]: Analyzing trace with hash 607095018, now seen corresponding path program 178 times [2021-06-12 19:57:49,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:49,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620649646] [2021-06-12 19:57:49,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:49,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:49,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620649646] [2021-06-12 19:57:49,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620649646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:49,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536050734] [2021-06-12 19:57:49,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:49,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:49,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:49,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:49,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:49,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:49,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:49,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:49,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:49,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:57:49,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:49,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:49,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:49,246 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:49,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:49,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:15 [2021-06-12 19:57:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:49,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536050734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:49,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:49,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 19:57:49,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252863515] [2021-06-12 19:57:49,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:57:49,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:49,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:57:49,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:57:49,265 INFO L87 Difference]: Start difference. First operand 337 states and 1004 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:49,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:49,417 INFO L93 Difference]: Finished difference Result 451 states and 1327 transitions. [2021-06-12 19:57:49,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:49,417 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:49,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:49,418 INFO L225 Difference]: With dead ends: 451 [2021-06-12 19:57:49,418 INFO L226 Difference]: Without dead ends: 436 [2021-06-12 19:57:49,418 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 111.2ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:57:49,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-12 19:57:49,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 336. [2021-06-12 19:57:49,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.982089552238806) internal successors, (999), 335 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:49,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 999 transitions. [2021-06-12 19:57:49,421 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 999 transitions. Word has length 20 [2021-06-12 19:57:49,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:49,421 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 999 transitions. [2021-06-12 19:57:49,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:49,422 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 999 transitions. [2021-06-12 19:57:49,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:49,434 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:49,434 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:49,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-06-12 19:57:49,652 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:49,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:49,652 INFO L82 PathProgramCache]: Analyzing trace with hash -278944692, now seen corresponding path program 179 times [2021-06-12 19:57:49,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:49,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21292469] [2021-06-12 19:57:49,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:49,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:49,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21292469] [2021-06-12 19:57:49,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21292469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:49,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413402994] [2021-06-12 19:57:49,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:49,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:57:49,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:49,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:57:49,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:49,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:49,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:49,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:49,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:49,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-06-12 19:57:49,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:57:49,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:49,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:57:49,832 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:49,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:49,846 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:49,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:49,847 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:35 [2021-06-12 19:57:49,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:49,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413402994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:49,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:49,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:57:49,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320580856] [2021-06-12 19:57:49,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:49,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:49,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:49,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:49,924 INFO L87 Difference]: Start difference. First operand 336 states and 999 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:50,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:50,187 INFO L93 Difference]: Finished difference Result 430 states and 1270 transitions. [2021-06-12 19:57:50,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:57:50,187 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:50,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:50,188 INFO L225 Difference]: With dead ends: 430 [2021-06-12 19:57:50,188 INFO L226 Difference]: Without dead ends: 415 [2021-06-12 19:57:50,188 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 200.9ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:50,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-06-12 19:57:50,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 333. [2021-06-12 19:57:50,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9849397590361444) internal successors, (991), 332 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:50,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 991 transitions. [2021-06-12 19:57:50,191 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 991 transitions. Word has length 20 [2021-06-12 19:57:50,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:50,191 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 991 transitions. [2021-06-12 19:57:50,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:50,192 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 991 transitions. [2021-06-12 19:57:50,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:50,192 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:50,192 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:50,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:50,397 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:50,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:50,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1997929374, now seen corresponding path program 180 times [2021-06-12 19:57:50,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:50,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376681681] [2021-06-12 19:57:50,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:50,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:50,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:50,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376681681] [2021-06-12 19:57:50,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376681681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:50,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702477115] [2021-06-12 19:57:50,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:50,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:57:50,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:50,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:50,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:50,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:50,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:50,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:50,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:50,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-06-12 19:57:50,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:57:50,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:50,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:50,560 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:50,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:50,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:15 [2021-06-12 19:57:50,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:50,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702477115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:50,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:50,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 19:57:50,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349359063] [2021-06-12 19:57:50,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:57:50,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:50,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:57:50,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:57:50,592 INFO L87 Difference]: Start difference. First operand 333 states and 991 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:50,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:50,736 INFO L93 Difference]: Finished difference Result 456 states and 1338 transitions. [2021-06-12 19:57:50,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:50,736 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:50,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:50,737 INFO L225 Difference]: With dead ends: 456 [2021-06-12 19:57:50,737 INFO L226 Difference]: Without dead ends: 441 [2021-06-12 19:57:50,737 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:57:50,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-12 19:57:50,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 332. [2021-06-12 19:57:50,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.9818731117824773) internal successors, (987), 331 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:50,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 987 transitions. [2021-06-12 19:57:50,741 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 987 transitions. Word has length 20 [2021-06-12 19:57:50,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:50,741 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 987 transitions. [2021-06-12 19:57:50,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:50,741 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 987 transitions. [2021-06-12 19:57:50,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:50,742 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:50,742 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:50,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:50,957 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:50,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:50,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1398268212, now seen corresponding path program 181 times [2021-06-12 19:57:50,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:50,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893374168] [2021-06-12 19:57:50,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:50,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:51,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:51,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:51,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893374168] [2021-06-12 19:57:51,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893374168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:51,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664576966] [2021-06-12 19:57:51,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:51,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:51,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:51,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:51,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:51,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:51,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:51,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:51,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-06-12 19:57:51,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:57:51,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:51,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:51,111 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:51,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:51,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:12 [2021-06-12 19:57:51,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:51,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664576966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:51,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:51,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:57:51,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877919343] [2021-06-12 19:57:51,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:57:51,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:51,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:57:51,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:57:51,125 INFO L87 Difference]: Start difference. First operand 332 states and 987 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:51,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:51,252 INFO L93 Difference]: Finished difference Result 528 states and 1552 transitions. [2021-06-12 19:57:51,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:51,252 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:51,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:51,253 INFO L225 Difference]: With dead ends: 528 [2021-06-12 19:57:51,253 INFO L226 Difference]: Without dead ends: 513 [2021-06-12 19:57:51,253 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:57:51,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-12 19:57:51,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 327. [2021-06-12 19:57:51,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9877300613496933) internal successors, (974), 326 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:51,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 974 transitions. [2021-06-12 19:57:51,258 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 974 transitions. Word has length 20 [2021-06-12 19:57:51,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:51,258 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 974 transitions. [2021-06-12 19:57:51,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:51,259 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 974 transitions. [2021-06-12 19:57:51,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:51,259 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:51,259 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:51,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:51,481 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:51,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:51,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1361462520, now seen corresponding path program 182 times [2021-06-12 19:57:51,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:51,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952987321] [2021-06-12 19:57:51,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:51,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:51,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:51,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:51,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952987321] [2021-06-12 19:57:51,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952987321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:51,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205632063] [2021-06-12 19:57:51,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:51,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:51,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:51,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:51,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:51,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:51,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:51,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:51,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:51,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-06-12 19:57:51,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:57:51,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:51,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:51,628 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:51,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:51,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:15 [2021-06-12 19:57:51,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:51,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205632063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:51,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:51,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:57:51,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877084378] [2021-06-12 19:57:51,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:57:51,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:51,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:57:51,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:57:51,646 INFO L87 Difference]: Start difference. First operand 327 states and 974 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:51,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:51,772 INFO L93 Difference]: Finished difference Result 570 states and 1661 transitions. [2021-06-12 19:57:51,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:51,772 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:51,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:51,773 INFO L225 Difference]: With dead ends: 570 [2021-06-12 19:57:51,773 INFO L226 Difference]: Without dead ends: 555 [2021-06-12 19:57:51,773 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:57:51,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-06-12 19:57:51,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 325. [2021-06-12 19:57:51,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9814814814814814) internal successors, (966), 324 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:51,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 966 transitions. [2021-06-12 19:57:51,777 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 966 transitions. Word has length 20 [2021-06-12 19:57:51,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:51,777 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 966 transitions. [2021-06-12 19:57:51,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:51,777 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 966 transitions. [2021-06-12 19:57:51,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:51,777 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:51,777 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:51,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable528 [2021-06-12 19:57:51,978 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:51,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:51,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1139035052, now seen corresponding path program 183 times [2021-06-12 19:57:51,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:51,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150792883] [2021-06-12 19:57:51,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:51,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:52,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:52,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150792883] [2021-06-12 19:57:52,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150792883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:52,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769966721] [2021-06-12 19:57:52,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:52,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:57:52,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:52,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:52,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:52,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:52,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:52,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:52,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:52,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:57:52,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:52,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:52,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:52,161 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 19:57:52,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:52,161 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:12 [2021-06-12 19:57:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:52,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769966721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:52,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:52,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:57:52,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617646569] [2021-06-12 19:57:52,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:57:52,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:52,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:57:52,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:57:52,175 INFO L87 Difference]: Start difference. First operand 325 states and 966 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:52,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:52,332 INFO L93 Difference]: Finished difference Result 417 states and 1232 transitions. [2021-06-12 19:57:52,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:52,332 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:52,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:52,333 INFO L225 Difference]: With dead ends: 417 [2021-06-12 19:57:52,333 INFO L226 Difference]: Without dead ends: 402 [2021-06-12 19:57:52,333 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:57:52,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-12 19:57:52,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 337. [2021-06-12 19:57:52,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.9910714285714284) internal successors, (1005), 336 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:52,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1005 transitions. [2021-06-12 19:57:52,336 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1005 transitions. Word has length 20 [2021-06-12 19:57:52,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:52,336 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1005 transitions. [2021-06-12 19:57:52,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:52,337 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1005 transitions. [2021-06-12 19:57:52,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:52,337 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:52,337 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:52,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:52,537 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:52,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:52,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1826004082, now seen corresponding path program 184 times [2021-06-12 19:57:52,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:52,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709718338] [2021-06-12 19:57:52,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:52,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:52,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:52,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:52,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709718338] [2021-06-12 19:57:52,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709718338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:52,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664063890] [2021-06-12 19:57:52,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:52,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:52,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:52,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:52,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:52,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:52,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:52,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:52,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:52,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:57:52,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:52,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:52,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:52,719 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 19:57:52,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:52,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:15 [2021-06-12 19:57:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:52,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664063890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:52,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:52,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:57:52,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477247587] [2021-06-12 19:57:52,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:52,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:52,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:52,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:52,777 INFO L87 Difference]: Start difference. First operand 337 states and 1005 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:53,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:53,106 INFO L93 Difference]: Finished difference Result 501 states and 1475 transitions. [2021-06-12 19:57:53,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:57:53,107 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:53,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:53,107 INFO L225 Difference]: With dead ends: 501 [2021-06-12 19:57:53,107 INFO L226 Difference]: Without dead ends: 486 [2021-06-12 19:57:53,107 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 260.9ms TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:57:53,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-12 19:57:53,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 334. [2021-06-12 19:57:53,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.981981981981982) internal successors, (993), 333 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:53,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 993 transitions. [2021-06-12 19:57:53,111 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 993 transitions. Word has length 20 [2021-06-12 19:57:53,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:53,111 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 993 transitions. [2021-06-12 19:57:53,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:53,111 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 993 transitions. [2021-06-12 19:57:53,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:53,111 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:53,112 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:53,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-06-12 19:57:53,312 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:53,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:53,312 INFO L82 PathProgramCache]: Analyzing trace with hash 910922594, now seen corresponding path program 185 times [2021-06-12 19:57:53,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:53,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025896125] [2021-06-12 19:57:53,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:53,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:53,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:53,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025896125] [2021-06-12 19:57:53,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025896125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:53,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974505040] [2021-06-12 19:57:53,403 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:53,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:57:53,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:53,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:57:53,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:53,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:53,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:53,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:53,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:53,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-06-12 19:57:53,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:57:53,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:53,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:57:53,484 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:53,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:53,501 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:53,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:53,502 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:41 [2021-06-12 19:57:53,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:53,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974505040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:53,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:53,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:57:53,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211744113] [2021-06-12 19:57:53,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:53,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:53,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:53,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:53,617 INFO L87 Difference]: Start difference. First operand 334 states and 993 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:53,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:53,941 INFO L93 Difference]: Finished difference Result 489 states and 1457 transitions. [2021-06-12 19:57:53,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:57:53,941 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:53,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:53,942 INFO L225 Difference]: With dead ends: 489 [2021-06-12 19:57:53,942 INFO L226 Difference]: Without dead ends: 474 [2021-06-12 19:57:53,942 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 282.6ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:53,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-06-12 19:57:53,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 331. [2021-06-12 19:57:53,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.981818181818182) internal successors, (984), 330 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:53,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 984 transitions. [2021-06-12 19:57:53,946 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 984 transitions. Word has length 20 [2021-06-12 19:57:53,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:53,946 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 984 transitions. [2021-06-12 19:57:53,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:53,946 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 984 transitions. [2021-06-12 19:57:53,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:53,946 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:53,946 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:54,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-06-12 19:57:54,147 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:54,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:54,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1898955376, now seen corresponding path program 186 times [2021-06-12 19:57:54,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:54,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020904698] [2021-06-12 19:57:54,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:54,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:54,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:54,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020904698] [2021-06-12 19:57:54,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020904698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:54,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971581950] [2021-06-12 19:57:54,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:54,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:57:54,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:54,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:54,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:54,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:54,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:54,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:54,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:54,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-06-12 19:57:54,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:57:54,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:54,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:54,308 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:54,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:54,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:15 [2021-06-12 19:57:54,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:54,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971581950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:54,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:54,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:57:54,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373745532] [2021-06-12 19:57:54,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:57:54,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:54,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:57:54,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:57:54,363 INFO L87 Difference]: Start difference. First operand 331 states and 984 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:54,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:54,604 INFO L93 Difference]: Finished difference Result 578 states and 1700 transitions. [2021-06-12 19:57:54,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:57:54,605 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:54,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:54,605 INFO L225 Difference]: With dead ends: 578 [2021-06-12 19:57:54,605 INFO L226 Difference]: Without dead ends: 563 [2021-06-12 19:57:54,605 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 214.3ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:54,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-12 19:57:54,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 323. [2021-06-12 19:57:54,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.981366459627329) internal successors, (960), 322 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:54,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 960 transitions. [2021-06-12 19:57:54,609 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 960 transitions. Word has length 20 [2021-06-12 19:57:54,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:54,609 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 960 transitions. [2021-06-12 19:57:54,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:54,609 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 960 transitions. [2021-06-12 19:57:54,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:54,610 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:54,610 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:54,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable536,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:54,810 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:54,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:54,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1547300954, now seen corresponding path program 187 times [2021-06-12 19:57:54,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:54,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777427743] [2021-06-12 19:57:54,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:54,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:54,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777427743] [2021-06-12 19:57:54,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777427743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:54,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25118168] [2021-06-12 19:57:54,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:54,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:54,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:54,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:54,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:54,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:54,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:54,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 19:57:54,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:54,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:54,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:54,972 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 19:57:54,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:54,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:12 [2021-06-12 19:57:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:55,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25118168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:55,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:55,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:57:55,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242504796] [2021-06-12 19:57:55,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:55,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:55,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:55,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:55,012 INFO L87 Difference]: Start difference. First operand 323 states and 960 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:55,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:55,463 INFO L93 Difference]: Finished difference Result 703 states and 2067 transitions. [2021-06-12 19:57:55,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:57:55,463 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:55,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:55,464 INFO L225 Difference]: With dead ends: 703 [2021-06-12 19:57:55,464 INFO L226 Difference]: Without dead ends: 688 [2021-06-12 19:57:55,464 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 353.4ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:57:55,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-06-12 19:57:55,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 332. [2021-06-12 19:57:55,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.9818731117824773) internal successors, (987), 331 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:55,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 987 transitions. [2021-06-12 19:57:55,468 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 987 transitions. Word has length 20 [2021-06-12 19:57:55,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:55,468 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 987 transitions. [2021-06-12 19:57:55,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:55,468 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 987 transitions. [2021-06-12 19:57:55,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:55,469 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:55,469 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:55,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:55,669 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:55,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:55,669 INFO L82 PathProgramCache]: Analyzing trace with hash 580451194, now seen corresponding path program 188 times [2021-06-12 19:57:55,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:55,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627230542] [2021-06-12 19:57:55,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:55,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:55,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:55,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627230542] [2021-06-12 19:57:55,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627230542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:55,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694030847] [2021-06-12 19:57:55,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:55,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:55,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:55,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:55,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:55,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:55,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:55,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:55,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:55,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:57:55,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:55,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:55,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:55,845 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 19:57:55,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:55,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:12 [2021-06-12 19:57:55,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:55,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694030847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:55,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:55,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:57:55,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422888343] [2021-06-12 19:57:55,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:57:55,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:55,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:57:55,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:57:55,859 INFO L87 Difference]: Start difference. First operand 332 states and 987 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:56,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:56,010 INFO L93 Difference]: Finished difference Result 523 states and 1537 transitions. [2021-06-12 19:57:56,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:56,010 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:56,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:56,011 INFO L225 Difference]: With dead ends: 523 [2021-06-12 19:57:56,011 INFO L226 Difference]: Without dead ends: 508 [2021-06-12 19:57:56,011 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 120.8ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:57:56,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-12 19:57:56,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 338. [2021-06-12 19:57:56,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9910979228486645) internal successors, (1008), 337 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:56,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1008 transitions. [2021-06-12 19:57:56,015 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1008 transitions. Word has length 20 [2021-06-12 19:57:56,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:56,015 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1008 transitions. [2021-06-12 19:57:56,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:56,015 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1008 transitions. [2021-06-12 19:57:56,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:56,015 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:56,015 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:56,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:56,216 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:56,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:56,216 INFO L82 PathProgramCache]: Analyzing trace with hash -749476968, now seen corresponding path program 189 times [2021-06-12 19:57:56,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:56,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969270003] [2021-06-12 19:57:56,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:56,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:56,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969270003] [2021-06-12 19:57:56,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969270003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:56,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393516835] [2021-06-12 19:57:56,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:56,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:57:56,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:56,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:56,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:56,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:56,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:56,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:56,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:56,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:57:56,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:56,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:56,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:56,395 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 19:57:56,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:56,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:15 [2021-06-12 19:57:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:56,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393516835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:56,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:56,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:57:56,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35721005] [2021-06-12 19:57:56,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:56,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:56,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:56,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:56,453 INFO L87 Difference]: Start difference. First operand 338 states and 1008 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:56,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:56,666 INFO L93 Difference]: Finished difference Result 599 states and 1756 transitions. [2021-06-12 19:57:56,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:57:56,666 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:56,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:56,667 INFO L225 Difference]: With dead ends: 599 [2021-06-12 19:57:56,667 INFO L226 Difference]: Without dead ends: 584 [2021-06-12 19:57:56,667 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 193.8ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:56,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-06-12 19:57:56,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 335. [2021-06-12 19:57:56,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.9820359281437128) internal successors, (996), 334 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:56,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 996 transitions. [2021-06-12 19:57:56,671 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 996 transitions. Word has length 20 [2021-06-12 19:57:56,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:56,671 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 996 transitions. [2021-06-12 19:57:56,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:56,672 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 996 transitions. [2021-06-12 19:57:56,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:56,672 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:56,672 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:56,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable539 [2021-06-12 19:57:56,872 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:56,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:56,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1664558456, now seen corresponding path program 190 times [2021-06-12 19:57:56,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:56,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241623559] [2021-06-12 19:57:56,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:56,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:56,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:56,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:56,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241623559] [2021-06-12 19:57:56,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241623559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:56,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492638591] [2021-06-12 19:57:56,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:56,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:56,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:56,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:56,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:57,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:57,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:57,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:57,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:57,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-06-12 19:57:57,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:57:57,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:57,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:57,045 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:57,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:57,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:15 [2021-06-12 19:57:57,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:57,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492638591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:57,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:57,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:57:57,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381714738] [2021-06-12 19:57:57,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:57,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:57,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:57,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:57,102 INFO L87 Difference]: Start difference. First operand 335 states and 996 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:57,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:57,310 INFO L93 Difference]: Finished difference Result 591 states and 1737 transitions. [2021-06-12 19:57:57,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:57:57,311 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:57,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:57,311 INFO L225 Difference]: With dead ends: 591 [2021-06-12 19:57:57,311 INFO L226 Difference]: Without dead ends: 576 [2021-06-12 19:57:57,311 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 181.7ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:57,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-12 19:57:57,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 329. [2021-06-12 19:57:57,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:57,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-06-12 19:57:57,317 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 20 [2021-06-12 19:57:57,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:57,317 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-06-12 19:57:57,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:57,318 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-06-12 19:57:57,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:57,318 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:57,318 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:57,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2021-06-12 19:57:57,541 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:57,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:57,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1655436906, now seen corresponding path program 191 times [2021-06-12 19:57:57,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:57,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418653849] [2021-06-12 19:57:57,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:57,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:57,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418653849] [2021-06-12 19:57:57,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418653849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:57,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506710215] [2021-06-12 19:57:57,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:57,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:57:57,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:57,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:57:57,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:57,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:57,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:57,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:57,683 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:57,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:57,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:57,702 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-06-12 19:57:57,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 19:57:57,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:57,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:57,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:57,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:57,781 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 19:57:57,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:57,781 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:33 [2021-06-12 19:57:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:57,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506710215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:57,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:57,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:57:57,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245690351] [2021-06-12 19:57:57,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:57,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:57,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:57,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:57,858 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:58,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:58,174 INFO L93 Difference]: Finished difference Result 509 states and 1497 transitions. [2021-06-12 19:57:58,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:57:58,174 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:58,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:58,175 INFO L225 Difference]: With dead ends: 509 [2021-06-12 19:57:58,175 INFO L226 Difference]: Without dead ends: 494 [2021-06-12 19:57:58,175 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 308.4ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:58,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-12 19:57:58,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 341. [2021-06-12 19:57:58,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.9911764705882353) internal successors, (1017), 340 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:58,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1017 transitions. [2021-06-12 19:57:58,179 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1017 transitions. Word has length 20 [2021-06-12 19:57:58,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:58,179 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1017 transitions. [2021-06-12 19:57:58,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:58,179 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1017 transitions. [2021-06-12 19:57:58,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:58,179 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:58,179 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:58,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable541,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:58,380 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:58,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:58,380 INFO L82 PathProgramCache]: Analyzing trace with hash 325508744, now seen corresponding path program 192 times [2021-06-12 19:57:58,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:58,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059198735] [2021-06-12 19:57:58,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:58,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:58,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059198735] [2021-06-12 19:57:58,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059198735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:58,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755618579] [2021-06-12 19:57:58,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:58,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:57:58,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:58,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:58,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:58,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:58,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:58,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:58,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:58,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:57:58,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 19:57:58,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:58,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:58,568 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 19:57:58,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:58,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:15 [2021-06-12 19:57:58,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:58,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755618579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:58,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:58,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:57:58,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57282710] [2021-06-12 19:57:58,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:58,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:58,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:58,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:58,625 INFO L87 Difference]: Start difference. First operand 341 states and 1017 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:58,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:58,874 INFO L93 Difference]: Finished difference Result 604 states and 1772 transitions. [2021-06-12 19:57:58,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:57:58,875 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:58,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:58,875 INFO L225 Difference]: With dead ends: 604 [2021-06-12 19:57:58,875 INFO L226 Difference]: Without dead ends: 589 [2021-06-12 19:57:58,876 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 229.2ms TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:57:58,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-06-12 19:57:58,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 338. [2021-06-12 19:57:58,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9821958456973294) internal successors, (1005), 337 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:58,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1005 transitions. [2021-06-12 19:57:58,880 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1005 transitions. Word has length 20 [2021-06-12 19:57:58,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:58,880 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1005 transitions. [2021-06-12 19:57:58,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:58,880 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1005 transitions. [2021-06-12 19:57:58,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:58,880 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:58,880 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:59,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-06-12 19:57:59,081 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:59,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:59,081 INFO L82 PathProgramCache]: Analyzing trace with hash -589572744, now seen corresponding path program 193 times [2021-06-12 19:57:59,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:59,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676307656] [2021-06-12 19:57:59,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:59,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:59,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:59,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676307656] [2021-06-12 19:57:59,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676307656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:59,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651558022] [2021-06-12 19:57:59,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:59,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:59,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:59,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:59,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:59,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:59,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:59,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:59,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-06-12 19:57:59,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:57:59,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:59,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:59,252 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:59,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:59,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:15 [2021-06-12 19:57:59,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:59,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651558022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:59,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:59,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:57:59,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71198325] [2021-06-12 19:57:59,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:59,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:59,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:59,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:59,308 INFO L87 Difference]: Start difference. First operand 338 states and 1005 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:59,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:59,606 INFO L93 Difference]: Finished difference Result 583 states and 1715 transitions. [2021-06-12 19:57:59,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:57:59,606 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:57:59,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:59,607 INFO L225 Difference]: With dead ends: 583 [2021-06-12 19:57:59,607 INFO L226 Difference]: Without dead ends: 568 [2021-06-12 19:57:59,607 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 200.3ms TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:57:59,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-06-12 19:57:59,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 335. [2021-06-12 19:57:59,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.9820359281437128) internal successors, (996), 334 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:59,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 996 transitions. [2021-06-12 19:57:59,611 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 996 transitions. Word has length 20 [2021-06-12 19:57:59,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:59,611 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 996 transitions. [2021-06-12 19:57:59,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:59,611 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 996 transitions. [2021-06-12 19:57:59,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:57:59,612 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:59,612 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:59,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-06-12 19:57:59,812 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:59,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:59,812 INFO L82 PathProgramCache]: Analyzing trace with hash 895516582, now seen corresponding path program 194 times [2021-06-12 19:57:59,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:59,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147366352] [2021-06-12 19:57:59,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:59,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:59,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:59,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147366352] [2021-06-12 19:57:59,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147366352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:59,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628153588] [2021-06-12 19:57:59,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:59,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:59,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:59,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:57:59,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:59,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:59,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:59,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:59,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:59,957 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-06-12 19:57:59,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-12 19:57:59,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:59,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:59,985 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:59,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:59,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:15 [2021-06-12 19:58:00,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:00,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628153588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:00,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:00,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:58:00,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111940743] [2021-06-12 19:58:00,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:58:00,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:00,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:58:00,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:58:00,057 INFO L87 Difference]: Start difference. First operand 335 states and 996 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:00,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:00,383 INFO L93 Difference]: Finished difference Result 685 states and 2009 transitions. [2021-06-12 19:58:00,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:58:00,383 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:58:00,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:00,384 INFO L225 Difference]: With dead ends: 685 [2021-06-12 19:58:00,384 INFO L226 Difference]: Without dead ends: 670 [2021-06-12 19:58:00,384 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:58:00,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-06-12 19:58:00,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 329. [2021-06-12 19:58:00,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:00,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-06-12 19:58:00,388 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 20 [2021-06-12 19:58:00,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:00,388 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-06-12 19:58:00,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:00,388 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-06-12 19:58:00,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:00,389 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:00,389 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:00,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-06-12 19:58:00,589 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:00,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:00,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1458639285, now seen corresponding path program 195 times [2021-06-12 19:58:00,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:00,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352337948] [2021-06-12 19:58:00,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:00,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:00,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:00,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352337948] [2021-06-12 19:58:00,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352337948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:00,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919239228] [2021-06-12 19:58:00,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:00,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:58:00,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:00,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:00,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:00,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:00,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:00,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:00,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:00,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 19:58:00,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:00,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:00,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:00,727 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:00,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:00,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 19:58:00,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:00,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919239228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:00,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:00,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:58:00,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003864668] [2021-06-12 19:58:00,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:58:00,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:00,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:58:00,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:58:00,736 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:00,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:00,856 INFO L93 Difference]: Finished difference Result 498 states and 1467 transitions. [2021-06-12 19:58:00,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:00,856 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:00,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:00,857 INFO L225 Difference]: With dead ends: 498 [2021-06-12 19:58:00,857 INFO L226 Difference]: Without dead ends: 476 [2021-06-12 19:58:00,857 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:58:00,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-12 19:58:00,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 343. [2021-06-12 19:58:00,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.017543859649123) internal successors, (1032), 342 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:00,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1032 transitions. [2021-06-12 19:58:00,861 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1032 transitions. Word has length 21 [2021-06-12 19:58:00,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:00,861 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1032 transitions. [2021-06-12 19:58:00,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:00,861 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1032 transitions. [2021-06-12 19:58:00,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:00,861 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:00,862 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:01,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:01,062 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:01,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:01,062 INFO L82 PathProgramCache]: Analyzing trace with hash -484060907, now seen corresponding path program 196 times [2021-06-12 19:58:01,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:01,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810165378] [2021-06-12 19:58:01,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:01,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:01,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:01,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:01,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810165378] [2021-06-12 19:58:01,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810165378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:01,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233144436] [2021-06-12 19:58:01,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:01,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:01,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:01,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:01,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:01,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:01,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:01,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:01,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:01,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 19:58:01,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:01,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:01,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:01,210 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:01,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:01,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 19:58:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:01,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233144436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:01,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:01,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:58:01,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208022460] [2021-06-12 19:58:01,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:58:01,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:01,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:58:01,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:58:01,219 INFO L87 Difference]: Start difference. First operand 343 states and 1032 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:01,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:01,305 INFO L93 Difference]: Finished difference Result 446 states and 1332 transitions. [2021-06-12 19:58:01,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:01,305 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:01,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:01,305 INFO L225 Difference]: With dead ends: 446 [2021-06-12 19:58:01,305 INFO L226 Difference]: Without dead ends: 424 [2021-06-12 19:58:01,306 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:58:01,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-12 19:58:01,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 349. [2021-06-12 19:58:01,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.0258620689655173) internal successors, (1053), 348 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:01,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1053 transitions. [2021-06-12 19:58:01,309 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1053 transitions. Word has length 21 [2021-06-12 19:58:01,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:01,309 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1053 transitions. [2021-06-12 19:58:01,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:01,309 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1053 transitions. [2021-06-12 19:58:01,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:01,310 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:01,310 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:01,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2021-06-12 19:58:01,510 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:01,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:01,510 INFO L82 PathProgramCache]: Analyzing trace with hash -985852243, now seen corresponding path program 197 times [2021-06-12 19:58:01,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:01,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443449203] [2021-06-12 19:58:01,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:01,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:01,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:01,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443449203] [2021-06-12 19:58:01,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443449203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:01,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159894690] [2021-06-12 19:58:01,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:01,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:01,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:01,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:01,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:01,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:01,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:01,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:01,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:01,651 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 19:58:01,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:01,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:01,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:01,663 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:01,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:01,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 19:58:01,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:01,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159894690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:01,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:01,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:58:01,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194998948] [2021-06-12 19:58:01,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:58:01,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:01,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:58:01,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:58:01,677 INFO L87 Difference]: Start difference. First operand 349 states and 1053 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:01,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:01,776 INFO L93 Difference]: Finished difference Result 455 states and 1356 transitions. [2021-06-12 19:58:01,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:01,776 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:01,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:01,777 INFO L225 Difference]: With dead ends: 455 [2021-06-12 19:58:01,777 INFO L226 Difference]: Without dead ends: 433 [2021-06-12 19:58:01,777 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:58:01,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-12 19:58:01,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 346. [2021-06-12 19:58:01,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.017391304347826) internal successors, (1041), 345 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:01,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1041 transitions. [2021-06-12 19:58:01,780 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1041 transitions. Word has length 21 [2021-06-12 19:58:01,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:01,780 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1041 transitions. [2021-06-12 19:58:01,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:01,780 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1041 transitions. [2021-06-12 19:58:01,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:01,781 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:01,781 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:01,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:01,981 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:01,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:01,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1202330933, now seen corresponding path program 198 times [2021-06-12 19:58:01,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:01,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520743515] [2021-06-12 19:58:01,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:02,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:02,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:02,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520743515] [2021-06-12 19:58:02,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520743515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:02,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319599850] [2021-06-12 19:58:02,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:02,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:58:02,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:02,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:02,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:02,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:02,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:02,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:02,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:02,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 19:58:02,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:02,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:02,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:02,142 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 19:58:02,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:02,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 19:58:02,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:02,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319599850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:02,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:02,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 19:58:02,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792811743] [2021-06-12 19:58:02,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:58:02,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:02,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:58:02,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:58:02,156 INFO L87 Difference]: Start difference. First operand 346 states and 1041 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:02,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:02,255 INFO L93 Difference]: Finished difference Result 443 states and 1323 transitions. [2021-06-12 19:58:02,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:02,255 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:02,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:02,256 INFO L225 Difference]: With dead ends: 443 [2021-06-12 19:58:02,256 INFO L226 Difference]: Without dead ends: 421 [2021-06-12 19:58:02,256 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:58:02,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-06-12 19:58:02,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 345. [2021-06-12 19:58:02,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.0319767441860463) internal successors, (1043), 344 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:02,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1043 transitions. [2021-06-12 19:58:02,259 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1043 transitions. Word has length 21 [2021-06-12 19:58:02,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:02,260 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1043 transitions. [2021-06-12 19:58:02,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:02,260 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1043 transitions. [2021-06-12 19:58:02,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:02,260 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:02,260 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:02,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:02,461 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:02,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:02,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1099695243, now seen corresponding path program 199 times [2021-06-12 19:58:02,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:02,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751407701] [2021-06-12 19:58:02,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:02,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:02,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:02,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751407701] [2021-06-12 19:58:02,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751407701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:02,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776273661] [2021-06-12 19:58:02,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:02,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:02,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:02,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:02,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:02,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:02,600 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:02,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:02,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:02,603 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-12 19:58:02,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:02,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:02,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:02,632 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:02,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:02,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 19:58:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:02,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776273661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:02,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:02,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:58:02,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268852767] [2021-06-12 19:58:02,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:58:02,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:02,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:58:02,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:58:02,655 INFO L87 Difference]: Start difference. First operand 345 states and 1043 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:02,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:02,790 INFO L93 Difference]: Finished difference Result 645 states and 1913 transitions. [2021-06-12 19:58:02,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:58:02,790 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:02,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:02,791 INFO L225 Difference]: With dead ends: 645 [2021-06-12 19:58:02,791 INFO L226 Difference]: Without dead ends: 626 [2021-06-12 19:58:02,791 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 116.2ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:02,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-06-12 19:58:02,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 353. [2021-06-12 19:58:02,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.0369318181818183) internal successors, (1069), 352 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:02,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1069 transitions. [2021-06-12 19:58:02,796 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1069 transitions. Word has length 21 [2021-06-12 19:58:02,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:02,797 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1069 transitions. [2021-06-12 19:58:02,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:02,797 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1069 transitions. [2021-06-12 19:58:02,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:02,797 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:02,797 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:03,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable563 [2021-06-12 19:58:03,001 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:03,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:03,001 INFO L82 PathProgramCache]: Analyzing trace with hash 2056460365, now seen corresponding path program 200 times [2021-06-12 19:58:03,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:03,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182066395] [2021-06-12 19:58:03,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:03,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:03,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:03,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:03,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182066395] [2021-06-12 19:58:03,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182066395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:03,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786400017] [2021-06-12 19:58:03,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:03,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:03,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:03,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:03,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:03,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:03,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:03,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:03,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:03,117 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:15 [2021-06-12 19:58:03,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:03,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:03,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:58:03,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:03,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:03,144 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:03,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:03,144 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:5 [2021-06-12 19:58:03,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:03,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786400017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:03,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:03,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:58:03,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127517859] [2021-06-12 19:58:03,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:58:03,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:03,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:58:03,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:58:03,168 INFO L87 Difference]: Start difference. First operand 353 states and 1069 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:03,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:03,318 INFO L93 Difference]: Finished difference Result 595 states and 1773 transitions. [2021-06-12 19:58:03,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:58:03,319 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:03,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:03,319 INFO L225 Difference]: With dead ends: 595 [2021-06-12 19:58:03,319 INFO L226 Difference]: Without dead ends: 556 [2021-06-12 19:58:03,320 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:03,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-12 19:58:03,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 353. [2021-06-12 19:58:03,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.03125) internal successors, (1067), 352 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:03,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1067 transitions. [2021-06-12 19:58:03,324 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1067 transitions. Word has length 21 [2021-06-12 19:58:03,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:03,324 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1067 transitions. [2021-06-12 19:58:03,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:03,324 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1067 transitions. [2021-06-12 19:58:03,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:03,324 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:03,324 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:03,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:03,525 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:03,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:03,525 INFO L82 PathProgramCache]: Analyzing trace with hash -843004949, now seen corresponding path program 201 times [2021-06-12 19:58:03,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:03,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737877320] [2021-06-12 19:58:03,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:03,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:03,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:03,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:03,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737877320] [2021-06-12 19:58:03,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737877320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:03,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770320289] [2021-06-12 19:58:03,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:03,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:58:03,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:03,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:03,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:03,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:03,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:03,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:03,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:03,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:03,692 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:03,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:03,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:58:03,698 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:20 [2021-06-12 19:58:03,796 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 19:58:03,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:03,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:03,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:03,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:03,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:58:03,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:03,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:03,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:03,812 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:7 [2021-06-12 19:58:03,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:03,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770320289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:03,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:03,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:03,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451306204] [2021-06-12 19:58:03,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:03,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:03,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:03,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:03,837 INFO L87 Difference]: Start difference. First operand 353 states and 1067 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:04,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:04,222 INFO L93 Difference]: Finished difference Result 737 states and 2196 transitions. [2021-06-12 19:58:04,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:58:04,222 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:04,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:04,223 INFO L225 Difference]: With dead ends: 737 [2021-06-12 19:58:04,223 INFO L226 Difference]: Without dead ends: 718 [2021-06-12 19:58:04,223 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 291.3ms TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:58:04,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-06-12 19:58:04,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 355. [2021-06-12 19:58:04,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.0282485875706215) internal successors, (1072), 354 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:04,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1072 transitions. [2021-06-12 19:58:04,227 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1072 transitions. Word has length 21 [2021-06-12 19:58:04,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:04,227 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1072 transitions. [2021-06-12 19:58:04,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:04,228 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1072 transitions. [2021-06-12 19:58:04,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:04,228 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:04,228 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:04,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-06-12 19:58:04,428 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:04,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:04,429 INFO L82 PathProgramCache]: Analyzing trace with hash 843386891, now seen corresponding path program 202 times [2021-06-12 19:58:04,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:04,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954004152] [2021-06-12 19:58:04,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:04,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:04,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:04,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954004152] [2021-06-12 19:58:04,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954004152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:04,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390128990] [2021-06-12 19:58:04,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:04,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:04,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:04,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:04,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:04,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:04,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:04,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:04,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:04,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:04,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:04,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:04,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:58:04,603 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:20 [2021-06-12 19:58:04,652 INFO L446 ElimStorePlain]: Different costs {0=[o_2, o_4, v_prenex_12], 1=[v_prenex_11]} [2021-06-12 19:58:04,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:04,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:04,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:04,665 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:04,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:04,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:04,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:04,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:04,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:58:04,678 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:04,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:04,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:04,686 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:45, output treesize:13 [2021-06-12 19:58:04,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:04,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390128990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:04,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:04,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:04,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97335843] [2021-06-12 19:58:04,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:04,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:04,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:04,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:04,729 INFO L87 Difference]: Start difference. First operand 355 states and 1072 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:05,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:05,241 INFO L93 Difference]: Finished difference Result 781 states and 2340 transitions. [2021-06-12 19:58:05,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:58:05,241 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:05,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:05,242 INFO L225 Difference]: With dead ends: 781 [2021-06-12 19:58:05,242 INFO L226 Difference]: Without dead ends: 758 [2021-06-12 19:58:05,242 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 343.9ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:58:05,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-06-12 19:58:05,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 355. [2021-06-12 19:58:05,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.0282485875706215) internal successors, (1072), 354 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:05,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1072 transitions. [2021-06-12 19:58:05,247 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1072 transitions. Word has length 21 [2021-06-12 19:58:05,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:05,247 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1072 transitions. [2021-06-12 19:58:05,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:05,247 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1072 transitions. [2021-06-12 19:58:05,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:05,248 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:05,248 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:05,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-06-12 19:58:05,448 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:05,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:05,448 INFO L82 PathProgramCache]: Analyzing trace with hash -2110462127, now seen corresponding path program 203 times [2021-06-12 19:58:05,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:05,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147151746] [2021-06-12 19:58:05,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:05,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:05,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:05,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147151746] [2021-06-12 19:58:05,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147151746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:05,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342334600] [2021-06-12 19:58:05,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:05,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:05,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:05,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:05,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:05,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:05,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:05,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:05,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:05,629 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:05,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:05,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:58:05,639 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:27 [2021-06-12 19:58:05,695 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 19:58:05,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:05,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:05,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:05,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:05,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:58:05,704 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:05,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:05,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:05,709 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:7 [2021-06-12 19:58:05,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:05,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342334600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:05,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:05,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:05,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414918766] [2021-06-12 19:58:05,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:05,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:05,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:05,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:05,734 INFO L87 Difference]: Start difference. First operand 355 states and 1072 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:06,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:06,057 INFO L93 Difference]: Finished difference Result 536 states and 1604 transitions. [2021-06-12 19:58:06,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:58:06,057 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:06,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:06,058 INFO L225 Difference]: With dead ends: 536 [2021-06-12 19:58:06,058 INFO L226 Difference]: Without dead ends: 517 [2021-06-12 19:58:06,058 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 228.6ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:58:06,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-12 19:58:06,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 361. [2021-06-12 19:58:06,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 3.0305555555555554) internal successors, (1091), 360 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:06,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1091 transitions. [2021-06-12 19:58:06,062 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1091 transitions. Word has length 21 [2021-06-12 19:58:06,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:06,062 INFO L482 AbstractCegarLoop]: Abstraction has 361 states and 1091 transitions. [2021-06-12 19:58:06,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:06,062 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1091 transitions. [2021-06-12 19:58:06,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:06,063 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:06,063 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:06,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:06,263 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:06,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:06,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1962296557, now seen corresponding path program 204 times [2021-06-12 19:58:06,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:06,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580174198] [2021-06-12 19:58:06,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:06,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:06,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580174198] [2021-06-12 19:58:06,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580174198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:06,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283836197] [2021-06-12 19:58:06,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:06,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:58:06,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:06,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:06,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:06,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:06,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:06,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:06,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:06,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:06,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-06-12 19:58:06,517 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 19:58:06,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:58:06,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:06,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:06,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:06,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:06,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:06,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:58:06,537 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:06,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:06,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:06,549 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:5 [2021-06-12 19:58:06,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:06,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283836197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:06,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:06,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:06,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137127590] [2021-06-12 19:58:06,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:06,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:06,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:06,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:06,577 INFO L87 Difference]: Start difference. First operand 361 states and 1091 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:06,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:06,854 INFO L93 Difference]: Finished difference Result 674 states and 1997 transitions. [2021-06-12 19:58:06,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:58:06,854 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:06,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:06,855 INFO L225 Difference]: With dead ends: 674 [2021-06-12 19:58:06,855 INFO L226 Difference]: Without dead ends: 614 [2021-06-12 19:58:06,855 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 236.6ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:58:06,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-06-12 19:58:06,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 366. [2021-06-12 19:58:06,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.0273972602739727) internal successors, (1105), 365 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:06,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1105 transitions. [2021-06-12 19:58:06,860 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1105 transitions. Word has length 21 [2021-06-12 19:58:06,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:06,860 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1105 transitions. [2021-06-12 19:58:06,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:06,860 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1105 transitions. [2021-06-12 19:58:06,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:06,860 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:06,860 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:07,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:07,061 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:07,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:07,061 INFO L82 PathProgramCache]: Analyzing trace with hash -424070287, now seen corresponding path program 205 times [2021-06-12 19:58:07,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:07,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836012383] [2021-06-12 19:58:07,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:07,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:07,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836012383] [2021-06-12 19:58:07,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836012383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:07,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214613728] [2021-06-12 19:58:07,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:07,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:07,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:07,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:07,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:07,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:07,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:07,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:07,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:07,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:07,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:58:07,257 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:27 [2021-06-12 19:58:07,287 INFO L446 ElimStorePlain]: Different costs {0=[o_2, o_4, v_prenex_14], 1=[v_prenex_13]} [2021-06-12 19:58:07,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:07,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:07,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:07,300 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:07,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:07,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:07,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:07,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:07,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:58:07,313 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:07,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:07,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:07,322 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:45, output treesize:13 [2021-06-12 19:58:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:07,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214613728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:07,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:07,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:07,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434939444] [2021-06-12 19:58:07,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:07,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:07,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:07,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:07,366 INFO L87 Difference]: Start difference. First operand 366 states and 1105 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:07,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:07,671 INFO L93 Difference]: Finished difference Result 611 states and 1840 transitions. [2021-06-12 19:58:07,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:58:07,671 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:07,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:07,672 INFO L225 Difference]: With dead ends: 611 [2021-06-12 19:58:07,672 INFO L226 Difference]: Without dead ends: 588 [2021-06-12 19:58:07,672 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 241.2ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:58:07,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-12 19:58:07,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 362. [2021-06-12 19:58:07,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 3.027700831024931) internal successors, (1093), 361 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:07,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1093 transitions. [2021-06-12 19:58:07,676 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1093 transitions. Word has length 21 [2021-06-12 19:58:07,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:07,676 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 1093 transitions. [2021-06-12 19:58:07,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:07,677 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1093 transitions. [2021-06-12 19:58:07,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:07,677 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:07,677 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:07,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-06-12 19:58:07,878 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:07,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:07,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1309868567, now seen corresponding path program 206 times [2021-06-12 19:58:07,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:07,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016053824] [2021-06-12 19:58:07,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:07,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:07,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016053824] [2021-06-12 19:58:07,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016053824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:07,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104411356] [2021-06-12 19:58:07,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:07,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:07,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:07,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:07,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:08,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:08,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:08,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:08,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:08,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:23 [2021-06-12 19:58:08,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:58:08,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:08,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:08,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:08,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:08,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:58:08,094 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:08,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:08,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:08,102 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:47, output treesize:13 [2021-06-12 19:58:08,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:08,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104411356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:08,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:08,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:08,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628271593] [2021-06-12 19:58:08,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:08,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:08,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:08,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:08,146 INFO L87 Difference]: Start difference. First operand 362 states and 1093 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:08,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:08,731 INFO L93 Difference]: Finished difference Result 704 states and 2089 transitions. [2021-06-12 19:58:08,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:58:08,731 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:08,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:08,732 INFO L225 Difference]: With dead ends: 704 [2021-06-12 19:58:08,732 INFO L226 Difference]: Without dead ends: 677 [2021-06-12 19:58:08,732 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 461.8ms TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:58:08,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-06-12 19:58:08,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 363. [2021-06-12 19:58:08,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 3.0331491712707184) internal successors, (1098), 362 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:08,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1098 transitions. [2021-06-12 19:58:08,737 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1098 transitions. Word has length 21 [2021-06-12 19:58:08,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:08,737 INFO L482 AbstractCegarLoop]: Abstraction has 363 states and 1098 transitions. [2021-06-12 19:58:08,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:08,737 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1098 transitions. [2021-06-12 19:58:08,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:08,738 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:08,738 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:08,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable605 [2021-06-12 19:58:08,939 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:08,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:08,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1594131251, now seen corresponding path program 207 times [2021-06-12 19:58:08,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:08,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820251589] [2021-06-12 19:58:08,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:09,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:09,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820251589] [2021-06-12 19:58:09,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820251589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:09,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517271430] [2021-06-12 19:58:09,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:09,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:58:09,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:09,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:58:09,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:09,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:09,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:09,138 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:58:09,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:09,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 19:58:09,141 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:09,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:09,144 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:09,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:09,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:58:09,159 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:57 [2021-06-12 19:58:09,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:09,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:09,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:09,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:09,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 19:58:09,227 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:09,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:09,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:58:09,250 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:09,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-12 19:58:09,253 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:09,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:09,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:58:09,272 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:99, output treesize:26 [2021-06-12 19:58:09,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:09,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517271430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:09,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:09,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:09,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836854212] [2021-06-12 19:58:09,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:09,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:09,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:09,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:09,361 INFO L87 Difference]: Start difference. First operand 363 states and 1098 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:10,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:10,043 INFO L93 Difference]: Finished difference Result 703 states and 2073 transitions. [2021-06-12 19:58:10,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:58:10,043 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:10,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:10,044 INFO L225 Difference]: With dead ends: 703 [2021-06-12 19:58:10,044 INFO L226 Difference]: Without dead ends: 649 [2021-06-12 19:58:10,044 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 671.1ms TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:58:10,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-06-12 19:58:10,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 378. [2021-06-12 19:58:10,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 3.029177718832891) internal successors, (1142), 377 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:10,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1142 transitions. [2021-06-12 19:58:10,049 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1142 transitions. Word has length 21 [2021-06-12 19:58:10,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:10,049 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 1142 transitions. [2021-06-12 19:58:10,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:10,049 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1142 transitions. [2021-06-12 19:58:10,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:10,049 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:10,049 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:10,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable611,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:10,250 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:10,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:10,250 INFO L82 PathProgramCache]: Analyzing trace with hash 92260589, now seen corresponding path program 208 times [2021-06-12 19:58:10,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:10,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111871536] [2021-06-12 19:58:10,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:10,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:10,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:10,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111871536] [2021-06-12 19:58:10,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111871536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:10,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124405676] [2021-06-12 19:58:10,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:10,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:10,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:10,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:10,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:10,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:10,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:10,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:10,420 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:10,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:10,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:10,430 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:45, output treesize:29 [2021-06-12 19:58:10,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:10,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:10,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:10,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:10,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:10,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:58:10,477 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:10,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:10,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:10,482 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:7 [2021-06-12 19:58:10,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:10,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124405676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:10,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:10,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:10,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612941061] [2021-06-12 19:58:10,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:10,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:10,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:10,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:10,510 INFO L87 Difference]: Start difference. First operand 378 states and 1142 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:10,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:10,784 INFO L93 Difference]: Finished difference Result 536 states and 1594 transitions. [2021-06-12 19:58:10,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:58:10,784 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:10,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:10,784 INFO L225 Difference]: With dead ends: 536 [2021-06-12 19:58:10,785 INFO L226 Difference]: Without dead ends: 515 [2021-06-12 19:58:10,785 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 267.9ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:58:10,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-06-12 19:58:10,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 372. [2021-06-12 19:58:10,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 3.0377358490566038) internal successors, (1127), 371 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:10,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1127 transitions. [2021-06-12 19:58:10,789 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1127 transitions. Word has length 21 [2021-06-12 19:58:10,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:10,789 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1127 transitions. [2021-06-12 19:58:10,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:10,789 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1127 transitions. [2021-06-12 19:58:10,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:10,789 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:10,789 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:10,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable620 [2021-06-12 19:58:10,990 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:10,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:10,990 INFO L82 PathProgramCache]: Analyzing trace with hash 77948227, now seen corresponding path program 209 times [2021-06-12 19:58:10,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:10,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14511265] [2021-06-12 19:58:10,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:10,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:11,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:11,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:11,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14511265] [2021-06-12 19:58:11,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14511265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:11,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735465004] [2021-06-12 19:58:11,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:11,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:11,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:11,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:11,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:11,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:11,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:11,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:11,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:11,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:11,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:11,130 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 19:58:11,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:11,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:11,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:11,157 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:11,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:11,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 19:58:11,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:11,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735465004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:11,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:11,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:58:11,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870684058] [2021-06-12 19:58:11,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:58:11,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:11,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:58:11,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:58:11,167 INFO L87 Difference]: Start difference. First operand 372 states and 1127 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:11,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:11,302 INFO L93 Difference]: Finished difference Result 695 states and 2077 transitions. [2021-06-12 19:58:11,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:11,303 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:11,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:11,303 INFO L225 Difference]: With dead ends: 695 [2021-06-12 19:58:11,303 INFO L226 Difference]: Without dead ends: 673 [2021-06-12 19:58:11,304 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:58:11,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-06-12 19:58:11,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 376. [2021-06-12 19:58:11,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.048) internal successors, (1143), 375 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:11,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1143 transitions. [2021-06-12 19:58:11,308 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1143 transitions. Word has length 21 [2021-06-12 19:58:11,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:11,308 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 1143 transitions. [2021-06-12 19:58:11,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:11,308 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1143 transitions. [2021-06-12 19:58:11,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:11,309 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:11,309 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:11,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable623 [2021-06-12 19:58:11,509 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:11,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:11,509 INFO L82 PathProgramCache]: Analyzing trace with hash -2011840595, now seen corresponding path program 210 times [2021-06-12 19:58:11,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:11,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387139312] [2021-06-12 19:58:11,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:11,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:11,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:11,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:11,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387139312] [2021-06-12 19:58:11,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387139312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:11,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433133054] [2021-06-12 19:58:11,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:11,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:58:11,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:11,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:11,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:11,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:11,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:11,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:11,666 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:11,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:11,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:58:11,675 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:27 [2021-06-12 19:58:11,773 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 19:58:11,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:11,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:11,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:11,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:58:11,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:11,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:11,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:11,787 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:7 [2021-06-12 19:58:11,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:11,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433133054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:11,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:11,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:11,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381520988] [2021-06-12 19:58:11,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:11,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:11,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:11,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:11,813 INFO L87 Difference]: Start difference. First operand 376 states and 1143 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:12,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:12,479 INFO L93 Difference]: Finished difference Result 849 states and 2499 transitions. [2021-06-12 19:58:12,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:58:12,479 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:12,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:12,480 INFO L225 Difference]: With dead ends: 849 [2021-06-12 19:58:12,480 INFO L226 Difference]: Without dead ends: 830 [2021-06-12 19:58:12,480 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 539.9ms TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:58:12,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-12 19:58:12,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 381. [2021-06-12 19:58:12,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 3.068421052631579) internal successors, (1166), 380 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:12,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1166 transitions. [2021-06-12 19:58:12,485 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1166 transitions. Word has length 21 [2021-06-12 19:58:12,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:12,485 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 1166 transitions. [2021-06-12 19:58:12,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:12,486 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1166 transitions. [2021-06-12 19:58:12,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:12,486 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:12,486 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:12,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:12,709 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:12,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:12,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1055075473, now seen corresponding path program 211 times [2021-06-12 19:58:12,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:12,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597107047] [2021-06-12 19:58:12,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:12,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:12,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597107047] [2021-06-12 19:58:12,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597107047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:12,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409193644] [2021-06-12 19:58:12,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:12,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:12,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:12,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:12,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:12,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:12,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:12,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:12,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:12,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-06-12 19:58:12,954 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 19:58:12,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:12,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:12,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:58:12,960 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:12,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:12,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:12,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:58:12,971 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:12,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:12,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:12,980 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:5 [2021-06-12 19:58:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:13,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409193644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:13,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:13,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:13,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844383752] [2021-06-12 19:58:13,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:13,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:13,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:13,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:13,007 INFO L87 Difference]: Start difference. First operand 381 states and 1166 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:13,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:13,410 INFO L93 Difference]: Finished difference Result 771 states and 2289 transitions. [2021-06-12 19:58:13,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:58:13,410 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:13,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:13,411 INFO L225 Difference]: With dead ends: 771 [2021-06-12 19:58:13,411 INFO L226 Difference]: Without dead ends: 732 [2021-06-12 19:58:13,411 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 337.2ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:58:13,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-06-12 19:58:13,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 383. [2021-06-12 19:58:13,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.068062827225131) internal successors, (1172), 382 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:13,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1172 transitions. [2021-06-12 19:58:13,417 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1172 transitions. Word has length 21 [2021-06-12 19:58:13,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:13,417 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 1172 transitions. [2021-06-12 19:58:13,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:13,417 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1172 transitions. [2021-06-12 19:58:13,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:13,418 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:13,418 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:13,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable635 [2021-06-12 19:58:13,641 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:13,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:13,641 INFO L82 PathProgramCache]: Analyzing trace with hash 340426509, now seen corresponding path program 212 times [2021-06-12 19:58:13,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:13,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459573213] [2021-06-12 19:58:13,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:13,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:13,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459573213] [2021-06-12 19:58:13,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459573213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:13,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635071510] [2021-06-12 19:58:13,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:13,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:13,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:13,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:13,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:13,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:13,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:13,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:13,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:13,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:13,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:13,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:13,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:58:13,810 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:27 [2021-06-12 19:58:13,915 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 19:58:13,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:13,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:13,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:13,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:13,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:58:13,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:13,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:13,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:13,929 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:7 [2021-06-12 19:58:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:13,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635071510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:13,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:13,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:13,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010830504] [2021-06-12 19:58:13,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:13,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:13,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:13,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:13,955 INFO L87 Difference]: Start difference. First operand 383 states and 1172 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:14,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:14,501 INFO L93 Difference]: Finished difference Result 787 states and 2357 transitions. [2021-06-12 19:58:14,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:58:14,501 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:14,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:14,502 INFO L225 Difference]: With dead ends: 787 [2021-06-12 19:58:14,502 INFO L226 Difference]: Without dead ends: 768 [2021-06-12 19:58:14,502 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 416.4ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:58:14,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-06-12 19:58:14,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 385. [2021-06-12 19:58:14,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.0651041666666665) internal successors, (1177), 384 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:14,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1177 transitions. [2021-06-12 19:58:14,507 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1177 transitions. Word has length 21 [2021-06-12 19:58:14,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:14,507 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1177 transitions. [2021-06-12 19:58:14,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:14,507 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1177 transitions. [2021-06-12 19:58:14,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:14,508 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:14,508 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:14,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable643,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:14,708 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:14,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:14,708 INFO L82 PathProgramCache]: Analyzing trace with hash 2026818349, now seen corresponding path program 213 times [2021-06-12 19:58:14,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:14,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892435184] [2021-06-12 19:58:14,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:14,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:14,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:14,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:14,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892435184] [2021-06-12 19:58:14,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892435184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:14,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316156728] [2021-06-12 19:58:14,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:14,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:58:14,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:14,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:14,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:14,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:14,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:14,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:14,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:14,865 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:14,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:14,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:58:14,874 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:27 [2021-06-12 19:58:14,964 INFO L446 ElimStorePlain]: Different costs {0=[o_2, o_4, v_prenex_16], 1=[v_prenex_15]} [2021-06-12 19:58:14,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:14,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:14,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:14,977 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:14,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:14,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:14,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:14,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:14,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:58:14,990 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:14,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:14,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:14,998 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:45, output treesize:13 [2021-06-12 19:58:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:15,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316156728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:15,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:15,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:15,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242090166] [2021-06-12 19:58:15,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:15,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:15,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:15,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:15,041 INFO L87 Difference]: Start difference. First operand 385 states and 1177 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:15,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:15,593 INFO L93 Difference]: Finished difference Result 819 states and 2450 transitions. [2021-06-12 19:58:15,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:58:15,594 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:15,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:15,594 INFO L225 Difference]: With dead ends: 819 [2021-06-12 19:58:15,595 INFO L226 Difference]: Without dead ends: 796 [2021-06-12 19:58:15,595 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 456.8ms TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:58:15,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-06-12 19:58:15,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 382. [2021-06-12 19:58:15,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 3.078740157480315) internal successors, (1173), 381 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:15,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1173 transitions. [2021-06-12 19:58:15,600 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1173 transitions. Word has length 21 [2021-06-12 19:58:15,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:15,600 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 1173 transitions. [2021-06-12 19:58:15,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:15,600 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1173 transitions. [2021-06-12 19:58:15,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:15,600 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:15,600 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:15,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-06-12 19:58:15,801 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:15,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:15,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1604188087, now seen corresponding path program 214 times [2021-06-12 19:58:15,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:15,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649733726] [2021-06-12 19:58:15,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:15,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:15,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:15,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649733726] [2021-06-12 19:58:15,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649733726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:15,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668565004] [2021-06-12 19:58:15,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:15,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:15,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:15,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:15,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:15,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:15,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:15,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:15,919 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:15,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:15,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:15,926 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 19:58:15,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:15,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:15,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:15,951 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:15,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:15,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 19:58:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:15,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668565004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:15,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:15,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:58:15,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928523381] [2021-06-12 19:58:15,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:58:15,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:15,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:58:15,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:58:15,960 INFO L87 Difference]: Start difference. First operand 382 states and 1173 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:16,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:16,069 INFO L93 Difference]: Finished difference Result 624 states and 1883 transitions. [2021-06-12 19:58:16,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:16,070 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:16,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:16,070 INFO L225 Difference]: With dead ends: 624 [2021-06-12 19:58:16,070 INFO L226 Difference]: Without dead ends: 602 [2021-06-12 19:58:16,071 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 102.5ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:58:16,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-06-12 19:58:16,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 385. [2021-06-12 19:58:16,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.0755208333333335) internal successors, (1181), 384 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:16,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1181 transitions. [2021-06-12 19:58:16,075 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1181 transitions. Word has length 21 [2021-06-12 19:58:16,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:16,075 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1181 transitions. [2021-06-12 19:58:16,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:16,075 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1181 transitions. [2021-06-12 19:58:16,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:16,076 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:16,076 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:16,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable665,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:16,276 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:16,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:16,276 INFO L82 PathProgramCache]: Analyzing trace with hash 276564851, now seen corresponding path program 215 times [2021-06-12 19:58:16,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:16,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356579028] [2021-06-12 19:58:16,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:16,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:16,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:16,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356579028] [2021-06-12 19:58:16,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356579028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:16,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070206012] [2021-06-12 19:58:16,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:16,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:58:16,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:16,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:16,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:16,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:16,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:16,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:16,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:16,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:16,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:16,421 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 19:58:16,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:16,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:16,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:16,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:16,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:16,454 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:16,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:16,455 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-12 19:58:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:16,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070206012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:16,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:16,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:58:16,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825304748] [2021-06-12 19:58:16,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:58:16,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:16,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:58:16,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:58:16,478 INFO L87 Difference]: Start difference. First operand 385 states and 1181 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:16,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:16,628 INFO L93 Difference]: Finished difference Result 630 states and 1896 transitions. [2021-06-12 19:58:16,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:16,628 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:16,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:16,629 INFO L225 Difference]: With dead ends: 630 [2021-06-12 19:58:16,629 INFO L226 Difference]: Without dead ends: 601 [2021-06-12 19:58:16,629 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:58:16,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-06-12 19:58:16,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 385. [2021-06-12 19:58:16,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.0755208333333335) internal successors, (1181), 384 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:16,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1181 transitions. [2021-06-12 19:58:16,633 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1181 transitions. Word has length 21 [2021-06-12 19:58:16,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:16,633 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1181 transitions. [2021-06-12 19:58:16,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:16,633 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1181 transitions. [2021-06-12 19:58:16,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:16,634 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:16,634 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:16,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:16,834 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:16,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:16,834 INFO L82 PathProgramCache]: Analyzing trace with hash -2024311991, now seen corresponding path program 216 times [2021-06-12 19:58:16,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:16,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663529846] [2021-06-12 19:58:16,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:16,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:16,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:16,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663529846] [2021-06-12 19:58:16,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663529846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:16,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044052808] [2021-06-12 19:58:16,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:16,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:58:16,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:16,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:16,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:17,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:17,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:17,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:17,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:17,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 19:58:17,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:17,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:17,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:17,036 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:17,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:17,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 19:58:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:17,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044052808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:17,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:17,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:58:17,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957316800] [2021-06-12 19:58:17,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:58:17,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:17,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:58:17,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:58:17,045 INFO L87 Difference]: Start difference. First operand 385 states and 1181 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:17,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:17,173 INFO L93 Difference]: Finished difference Result 520 states and 1575 transitions. [2021-06-12 19:58:17,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:17,174 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:17,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:17,174 INFO L225 Difference]: With dead ends: 520 [2021-06-12 19:58:17,174 INFO L226 Difference]: Without dead ends: 498 [2021-06-12 19:58:17,174 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 123.7ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:58:17,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-12 19:58:17,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 391. [2021-06-12 19:58:17,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 3.082051282051282) internal successors, (1202), 390 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:17,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1202 transitions. [2021-06-12 19:58:17,179 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1202 transitions. Word has length 21 [2021-06-12 19:58:17,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:17,179 INFO L482 AbstractCegarLoop]: Abstraction has 391 states and 1202 transitions. [2021-06-12 19:58:17,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:17,179 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1202 transitions. [2021-06-12 19:58:17,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:17,179 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:17,179 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:17,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable674 [2021-06-12 19:58:17,380 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:17,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:17,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1768863969, now seen corresponding path program 217 times [2021-06-12 19:58:17,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:17,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551100410] [2021-06-12 19:58:17,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:17,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:17,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551100410] [2021-06-12 19:58:17,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551100410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:17,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436621548] [2021-06-12 19:58:17,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:17,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:17,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:17,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:17,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:17,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:17,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:17,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:17,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:32 [2021-06-12 19:58:17,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:17,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:17,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:17,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:17,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:17,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 19:58:17,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:17,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:17,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:17,690 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 19:58:17,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:17,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436621548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:17,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:17,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:58:17,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142223848] [2021-06-12 19:58:17,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:58:17,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:17,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:58:17,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:58:17,704 INFO L87 Difference]: Start difference. First operand 391 states and 1202 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:17,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:17,880 INFO L93 Difference]: Finished difference Result 511 states and 1551 transitions. [2021-06-12 19:58:17,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:17,881 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:17,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:17,881 INFO L225 Difference]: With dead ends: 511 [2021-06-12 19:58:17,881 INFO L226 Difference]: Without dead ends: 489 [2021-06-12 19:58:17,881 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:58:17,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-12 19:58:17,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 388. [2021-06-12 19:58:17,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.0749354005167957) internal successors, (1190), 387 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:17,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1190 transitions. [2021-06-12 19:58:17,885 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1190 transitions. Word has length 21 [2021-06-12 19:58:17,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:17,886 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 1190 transitions. [2021-06-12 19:58:17,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:17,886 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1190 transitions. [2021-06-12 19:58:17,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:17,886 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:17,886 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:18,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable677,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:18,087 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:18,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:18,087 INFO L82 PathProgramCache]: Analyzing trace with hash -337920151, now seen corresponding path program 218 times [2021-06-12 19:58:18,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:18,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241999663] [2021-06-12 19:58:18,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:18,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:18,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:18,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241999663] [2021-06-12 19:58:18,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241999663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:18,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73882562] [2021-06-12 19:58:18,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:18,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:18,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:18,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:18,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:18,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:18,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:18,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:18,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:18,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 19:58:18,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:18,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:18,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:18,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 19:58:18,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:18,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:18,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:18,358 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 19:58:18,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:18,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73882562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:18,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:18,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:58:18,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165091677] [2021-06-12 19:58:18,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:58:18,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:18,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:58:18,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:58:18,372 INFO L87 Difference]: Start difference. First operand 388 states and 1190 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:18,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:18,537 INFO L93 Difference]: Finished difference Result 514 states and 1557 transitions. [2021-06-12 19:58:18,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:18,537 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:18,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:18,538 INFO L225 Difference]: With dead ends: 514 [2021-06-12 19:58:18,538 INFO L226 Difference]: Without dead ends: 492 [2021-06-12 19:58:18,538 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 178.6ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:58:18,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-06-12 19:58:18,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 385. [2021-06-12 19:58:18,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.0755208333333335) internal successors, (1181), 384 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:18,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1181 transitions. [2021-06-12 19:58:18,542 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1181 transitions. Word has length 21 [2021-06-12 19:58:18,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:18,542 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1181 transitions. [2021-06-12 19:58:18,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:18,542 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1181 transitions. [2021-06-12 19:58:18,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:18,543 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:18,543 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:18,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable680 [2021-06-12 19:58:18,743 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:18,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:18,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1394832891, now seen corresponding path program 219 times [2021-06-12 19:58:18,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:18,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160111134] [2021-06-12 19:58:18,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:18,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:18,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160111134] [2021-06-12 19:58:18,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160111134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:18,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676355112] [2021-06-12 19:58:18,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:18,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:58:18,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:18,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:18,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:18,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:18,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:18,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:18,906 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:18,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:18,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:18,914 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 19:58:18,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:18,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:18,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:18,981 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:18,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:18,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 19:58:18,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:18,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676355112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:18,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:18,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:58:18,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287526853] [2021-06-12 19:58:18,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:58:18,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:18,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:58:18,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:58:18,990 INFO L87 Difference]: Start difference. First operand 385 states and 1181 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:19,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:19,143 INFO L93 Difference]: Finished difference Result 532 states and 1614 transitions. [2021-06-12 19:58:19,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:19,144 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:19,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:19,144 INFO L225 Difference]: With dead ends: 532 [2021-06-12 19:58:19,144 INFO L226 Difference]: Without dead ends: 510 [2021-06-12 19:58:19,144 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 134.7ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:58:19,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-06-12 19:58:19,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 392. [2021-06-12 19:58:19,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.0920716112531967) internal successors, (1209), 391 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:19,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1209 transitions. [2021-06-12 19:58:19,149 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1209 transitions. Word has length 21 [2021-06-12 19:58:19,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:19,149 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 1209 transitions. [2021-06-12 19:58:19,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:19,149 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1209 transitions. [2021-06-12 19:58:19,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:19,149 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:19,149 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:19,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-06-12 19:58:19,350 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:19,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:19,350 INFO L82 PathProgramCache]: Analyzing trace with hash 893041555, now seen corresponding path program 220 times [2021-06-12 19:58:19,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:19,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364649884] [2021-06-12 19:58:19,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:19,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:19,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364649884] [2021-06-12 19:58:19,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364649884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:19,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157951680] [2021-06-12 19:58:19,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:19,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:19,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:19,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:19,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:19,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:19,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:19,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:19,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:19,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:19,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:19,516 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 19:58:19,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:19,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:19,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:19,556 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:19,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:19,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 19:58:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:19,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157951680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:19,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:19,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:58:19,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123623024] [2021-06-12 19:58:19,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:58:19,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:19,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:58:19,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:58:19,570 INFO L87 Difference]: Start difference. First operand 392 states and 1209 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:19,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:19,719 INFO L93 Difference]: Finished difference Result 523 states and 1590 transitions. [2021-06-12 19:58:19,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:19,720 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:19,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:19,720 INFO L225 Difference]: With dead ends: 523 [2021-06-12 19:58:19,720 INFO L226 Difference]: Without dead ends: 501 [2021-06-12 19:58:19,721 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:58:19,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-12 19:58:19,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 389. [2021-06-12 19:58:19,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.0850515463917527) internal successors, (1197), 388 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:19,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1197 transitions. [2021-06-12 19:58:19,725 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1197 transitions. Word has length 21 [2021-06-12 19:58:19,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:19,725 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 1197 transitions. [2021-06-12 19:58:19,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:19,725 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1197 transitions. [2021-06-12 19:58:19,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:19,726 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:19,726 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:19,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable687,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:19,943 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:19,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:19,943 INFO L82 PathProgramCache]: Analyzing trace with hash 2020157009, now seen corresponding path program 221 times [2021-06-12 19:58:19,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:19,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218976736] [2021-06-12 19:58:19,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:20,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:20,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:20,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218976736] [2021-06-12 19:58:20,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218976736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:20,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523118465] [2021-06-12 19:58:20,019 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:20,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:20,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:20,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:20,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:20,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:20,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:20,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:20,088 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:20,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:20,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:20,097 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 19:58:20,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:20,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:20,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:20,157 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:20,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:20,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 19:58:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:20,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523118465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:20,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:20,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:58:20,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393073952] [2021-06-12 19:58:20,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:58:20,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:20,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:58:20,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:58:20,167 INFO L87 Difference]: Start difference. First operand 389 states and 1197 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:20,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:20,321 INFO L93 Difference]: Finished difference Result 507 states and 1529 transitions. [2021-06-12 19:58:20,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:20,321 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:20,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:20,322 INFO L225 Difference]: With dead ends: 507 [2021-06-12 19:58:20,322 INFO L226 Difference]: Without dead ends: 488 [2021-06-12 19:58:20,322 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 138.7ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:58:20,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-12 19:58:20,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 395. [2021-06-12 19:58:20,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.0964467005076144) internal successors, (1220), 394 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:20,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1220 transitions. [2021-06-12 19:58:20,328 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1220 transitions. Word has length 21 [2021-06-12 19:58:20,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:20,328 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 1220 transitions. [2021-06-12 19:58:20,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:20,328 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1220 transitions. [2021-06-12 19:58:20,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:20,329 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:20,329 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:20,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:20,533 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:20,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:20,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1797948397, now seen corresponding path program 222 times [2021-06-12 19:58:20,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:20,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216614680] [2021-06-12 19:58:20,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:20,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:20,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216614680] [2021-06-12 19:58:20,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216614680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:20,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464579552] [2021-06-12 19:58:20,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:20,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:58:20,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:20,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:20,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:20,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:20,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:20,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:20,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:20,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:58:20,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:20,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:20,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:58:20,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:20,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:20,737 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:20,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:20,737 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:5 [2021-06-12 19:58:20,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:20,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464579552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:20,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:20,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:58:20,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231622948] [2021-06-12 19:58:20,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:58:20,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:20,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:58:20,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:58:20,745 INFO L87 Difference]: Start difference. First operand 395 states and 1220 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:20,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:20,867 INFO L93 Difference]: Finished difference Result 516 states and 1563 transitions. [2021-06-12 19:58:20,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:20,867 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:20,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:20,868 INFO L225 Difference]: With dead ends: 516 [2021-06-12 19:58:20,868 INFO L226 Difference]: Without dead ends: 483 [2021-06-12 19:58:20,868 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:58:20,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-06-12 19:58:20,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 395. [2021-06-12 19:58:20,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.083756345177665) internal successors, (1215), 394 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:20,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1215 transitions. [2021-06-12 19:58:20,872 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1215 transitions. Word has length 21 [2021-06-12 19:58:20,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:20,872 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 1215 transitions. [2021-06-12 19:58:20,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:20,872 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1215 transitions. [2021-06-12 19:58:20,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:20,873 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:20,873 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:21,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-06-12 19:58:21,073 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:21,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:21,073 INFO L82 PathProgramCache]: Analyzing trace with hash -588418447, now seen corresponding path program 223 times [2021-06-12 19:58:21,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:21,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14327805] [2021-06-12 19:58:21,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:21,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:21,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:21,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:21,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14327805] [2021-06-12 19:58:21,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14327805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:21,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421766476] [2021-06-12 19:58:21,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:21,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:21,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:21,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:21,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:21,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:21,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:21,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:21,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:21,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:21,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:58:21,296 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:41 [2021-06-12 19:58:21,418 INFO L446 ElimStorePlain]: Different costs {0=[o_2, o_4], 1=[v_prenex_18, v_prenex_17]} [2021-06-12 19:58:21,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:21,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:21,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:21,439 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:21,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:21,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:21,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:21,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:21,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:21,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:58:21,462 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:21,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:21,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:21,478 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:51, output treesize:13 [2021-06-12 19:58:21,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:21,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421766476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:21,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:21,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:21,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394345132] [2021-06-12 19:58:21,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:21,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:21,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:21,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:21,527 INFO L87 Difference]: Start difference. First operand 395 states and 1215 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:21,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:21,939 INFO L93 Difference]: Finished difference Result 683 states and 2051 transitions. [2021-06-12 19:58:21,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:58:21,939 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:21,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:21,940 INFO L225 Difference]: With dead ends: 683 [2021-06-12 19:58:21,940 INFO L226 Difference]: Without dead ends: 660 [2021-06-12 19:58:21,940 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 287.5ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:58:21,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-06-12 19:58:21,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 407. [2021-06-12 19:58:21,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.0935960591133007) internal successors, (1256), 406 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:21,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1256 transitions. [2021-06-12 19:58:21,945 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1256 transitions. Word has length 21 [2021-06-12 19:58:21,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:21,945 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 1256 transitions. [2021-06-12 19:58:21,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:21,945 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1256 transitions. [2021-06-12 19:58:21,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:21,946 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:21,946 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:22,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable700 [2021-06-12 19:58:22,146 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:22,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:22,146 INFO L82 PathProgramCache]: Analyzing trace with hash -872681131, now seen corresponding path program 224 times [2021-06-12 19:58:22,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:22,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022830290] [2021-06-12 19:58:22,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:22,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:22,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:22,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022830290] [2021-06-12 19:58:22,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022830290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:22,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974556510] [2021-06-12 19:58:22,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:22,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:22,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:22,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:22,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:22,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:22,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:22,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:22,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:22,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:58:22,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:22,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:22,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:58:22,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:22,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:22,334 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:22,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:22,334 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 19:58:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:22,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974556510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:22,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:22,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:58:22,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725784603] [2021-06-12 19:58:22,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:58:22,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:22,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:58:22,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:58:22,353 INFO L87 Difference]: Start difference. First operand 407 states and 1256 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:22,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:22,473 INFO L93 Difference]: Finished difference Result 518 states and 1576 transitions. [2021-06-12 19:58:22,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:22,473 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:22,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:22,474 INFO L225 Difference]: With dead ends: 518 [2021-06-12 19:58:22,474 INFO L226 Difference]: Without dead ends: 491 [2021-06-12 19:58:22,474 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 118.9ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:58:22,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-12 19:58:22,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 405. [2021-06-12 19:58:22,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.0965346534653464) internal successors, (1251), 404 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:22,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1251 transitions. [2021-06-12 19:58:22,478 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1251 transitions. Word has length 21 [2021-06-12 19:58:22,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:22,478 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1251 transitions. [2021-06-12 19:58:22,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:22,478 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1251 transitions. [2021-06-12 19:58:22,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:22,479 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:22,479 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:22,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable719,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:22,679 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:22,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:22,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1708420467, now seen corresponding path program 225 times [2021-06-12 19:58:22,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:22,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320299799] [2021-06-12 19:58:22,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:22,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:22,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:22,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:22,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320299799] [2021-06-12 19:58:22,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320299799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:22,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813258442] [2021-06-12 19:58:22,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:22,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:58:22,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:22,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:22,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:22,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:22,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:22,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:22,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:22,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:22,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:22,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:58:22,942 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:41 [2021-06-12 19:58:23,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:23,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:23,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:23,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:23,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:23,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:58:23,062 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:23,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:23,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:23,071 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:13 [2021-06-12 19:58:23,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:23,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813258442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:23,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:23,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:23,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650174464] [2021-06-12 19:58:23,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:23,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:23,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:23,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:23,122 INFO L87 Difference]: Start difference. First operand 405 states and 1251 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:23,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:23,736 INFO L93 Difference]: Finished difference Result 664 states and 2001 transitions. [2021-06-12 19:58:23,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:58:23,737 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:23,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:23,737 INFO L225 Difference]: With dead ends: 664 [2021-06-12 19:58:23,737 INFO L226 Difference]: Without dead ends: 645 [2021-06-12 19:58:23,737 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 457.4ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:58:23,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-06-12 19:58:23,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 401. [2021-06-12 19:58:23,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.0875) internal successors, (1235), 400 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:23,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1235 transitions. [2021-06-12 19:58:23,742 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1235 transitions. Word has length 21 [2021-06-12 19:58:23,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:23,742 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 1235 transitions. [2021-06-12 19:58:23,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:23,742 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1235 transitions. [2021-06-12 19:58:23,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:23,743 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:23,743 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:23,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable723 [2021-06-12 19:58:23,945 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:23,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:23,945 INFO L82 PathProgramCache]: Analyzing trace with hash -20541421, now seen corresponding path program 226 times [2021-06-12 19:58:23,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:23,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541594179] [2021-06-12 19:58:23,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:24,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:24,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:24,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541594179] [2021-06-12 19:58:24,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541594179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:24,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585166057] [2021-06-12 19:58:24,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:24,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:24,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:24,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:24,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:24,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:24,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:24,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:24,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:24,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:24,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:24,112 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 19:58:24,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:24,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:24,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:24,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:24,174 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:24,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:24,179 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:24,180 INFO L518 ElimStorePlain]: Eliminatee v_prenex_20 vanished before elimination [2021-06-12 19:58:24,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:24,180 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:15 [2021-06-12 19:58:24,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:24,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585166057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:24,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:24,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:58:24,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208987485] [2021-06-12 19:58:24,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:58:24,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:24,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:58:24,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:58:24,197 INFO L87 Difference]: Start difference. First operand 401 states and 1235 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:24,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:24,348 INFO L93 Difference]: Finished difference Result 553 states and 1683 transitions. [2021-06-12 19:58:24,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:24,348 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:24,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:24,348 INFO L225 Difference]: With dead ends: 553 [2021-06-12 19:58:24,349 INFO L226 Difference]: Without dead ends: 524 [2021-06-12 19:58:24,349 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 132.6ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:58:24,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-06-12 19:58:24,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 401. [2021-06-12 19:58:24,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.0875) internal successors, (1235), 400 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:24,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1235 transitions. [2021-06-12 19:58:24,353 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1235 transitions. Word has length 21 [2021-06-12 19:58:24,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:24,353 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 1235 transitions. [2021-06-12 19:58:24,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:24,353 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1235 transitions. [2021-06-12 19:58:24,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:24,353 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:24,353 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:24,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:24,554 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:24,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:24,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1115240339, now seen corresponding path program 227 times [2021-06-12 19:58:24,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:24,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786414465] [2021-06-12 19:58:24,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:24,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:24,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:24,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786414465] [2021-06-12 19:58:24,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786414465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:24,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014362070] [2021-06-12 19:58:24,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:24,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:58:24,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:24,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:24,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:24,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:24,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:24,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:24,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:24,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:24,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:39 [2021-06-12 19:58:24,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:24,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:24,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:24,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:24,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:58:24,876 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:24,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:24,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:24,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:58:24,897 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:24,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:24,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:24,915 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:71, output treesize:13 [2021-06-12 19:58:24,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:24,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014362070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:24,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:24,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:24,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187326645] [2021-06-12 19:58:24,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:24,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:24,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:24,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:24,965 INFO L87 Difference]: Start difference. First operand 401 states and 1235 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:25,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:25,479 INFO L93 Difference]: Finished difference Result 756 states and 2254 transitions. [2021-06-12 19:58:25,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:58:25,479 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:25,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:25,480 INFO L225 Difference]: With dead ends: 756 [2021-06-12 19:58:25,480 INFO L226 Difference]: Without dead ends: 702 [2021-06-12 19:58:25,480 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 407.2ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:58:25,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-06-12 19:58:25,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 402. [2021-06-12 19:58:25,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.112219451371571) internal successors, (1248), 401 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:25,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1248 transitions. [2021-06-12 19:58:25,485 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1248 transitions. Word has length 21 [2021-06-12 19:58:25,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:25,485 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1248 transitions. [2021-06-12 19:58:25,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:25,486 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1248 transitions. [2021-06-12 19:58:25,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:25,486 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:25,486 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:25,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable738,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:25,686 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:25,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:25,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1739526103, now seen corresponding path program 228 times [2021-06-12 19:58:25,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:25,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32898248] [2021-06-12 19:58:25,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:25,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:25,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:25,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:25,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32898248] [2021-06-12 19:58:25,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32898248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:25,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326370063] [2021-06-12 19:58:25,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:25,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:58:25,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:25,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:25,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:25,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:25,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:25,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:25,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:25,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:25,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:25,879 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 19:58:25,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:25,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:25,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:25,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:25,927 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:25,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:25,938 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:25,938 INFO L518 ElimStorePlain]: Eliminatee v_prenex_22 vanished before elimination [2021-06-12 19:58:25,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:25,938 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:21 [2021-06-12 19:58:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:25,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326370063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:25,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:25,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 19:58:25,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346784146] [2021-06-12 19:58:25,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:58:25,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:25,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:58:25,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:58:25,964 INFO L87 Difference]: Start difference. First operand 402 states and 1248 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:26,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:26,150 INFO L93 Difference]: Finished difference Result 561 states and 1713 transitions. [2021-06-12 19:58:26,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:26,150 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:26,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:26,151 INFO L225 Difference]: With dead ends: 561 [2021-06-12 19:58:26,151 INFO L226 Difference]: Without dead ends: 532 [2021-06-12 19:58:26,151 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:58:26,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-06-12 19:58:26,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 402. [2021-06-12 19:58:26,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.112219451371571) internal successors, (1248), 401 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:26,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1248 transitions. [2021-06-12 19:58:26,155 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1248 transitions. Word has length 21 [2021-06-12 19:58:26,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:26,155 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1248 transitions. [2021-06-12 19:58:26,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:26,155 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1248 transitions. [2021-06-12 19:58:26,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:26,156 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:26,156 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:26,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-06-12 19:58:26,356 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:26,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:26,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1442259693, now seen corresponding path program 229 times [2021-06-12 19:58:26,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:26,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816734704] [2021-06-12 19:58:26,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:26,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:26,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:26,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816734704] [2021-06-12 19:58:26,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816734704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:26,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073784980] [2021-06-12 19:58:26,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:26,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:26,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:26,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:26,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:26,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:26,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:26,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:26,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:26,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:58:26,605 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:41 [2021-06-12 19:58:26,650 INFO L446 ElimStorePlain]: Different costs {0=[o_2, o_4], 1=[v_prenex_24, v_prenex_23]} [2021-06-12 19:58:26,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:26,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:26,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:26,668 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:26,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:26,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:26,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:26,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:26,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:26,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:58:26,687 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:26,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:26,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:26,701 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:59, output treesize:22 [2021-06-12 19:58:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:26,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073784980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:26,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:26,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:26,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137586694] [2021-06-12 19:58:26,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:26,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:26,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:26,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:26,772 INFO L87 Difference]: Start difference. First operand 402 states and 1248 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:27,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:27,234 INFO L93 Difference]: Finished difference Result 714 states and 2161 transitions. [2021-06-12 19:58:27,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:58:27,234 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:27,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:27,235 INFO L225 Difference]: With dead ends: 714 [2021-06-12 19:58:27,235 INFO L226 Difference]: Without dead ends: 691 [2021-06-12 19:58:27,235 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 351.2ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:58:27,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-06-12 19:58:27,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 405. [2021-06-12 19:58:27,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.126237623762376) internal successors, (1263), 404 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:27,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1263 transitions. [2021-06-12 19:58:27,240 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1263 transitions. Word has length 21 [2021-06-12 19:58:27,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:27,241 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1263 transitions. [2021-06-12 19:58:27,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:27,241 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1263 transitions. [2021-06-12 19:58:27,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:27,241 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:27,241 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:27,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:27,442 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:27,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:27,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1564112981, now seen corresponding path program 230 times [2021-06-12 19:58:27,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:27,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290869673] [2021-06-12 19:58:27,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:27,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:27,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:27,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:27,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290869673] [2021-06-12 19:58:27,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290869673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:27,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250908819] [2021-06-12 19:58:27,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:27,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:27,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:27,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:27,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:27,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:27,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:27,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:27,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:27,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:27,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:39 [2021-06-12 19:58:27,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:27,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:27,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:27,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:27,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:58:27,731 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:27,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:27,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:27,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:58:27,755 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:27,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:27,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:27,777 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:81, output treesize:25 [2021-06-12 19:58:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:27,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250908819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:27,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:27,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:27,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313819066] [2021-06-12 19:58:27,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:27,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:27,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:27,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:27,853 INFO L87 Difference]: Start difference. First operand 405 states and 1263 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:28,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:28,332 INFO L93 Difference]: Finished difference Result 681 states and 2047 transitions. [2021-06-12 19:58:28,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:58:28,333 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:28,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:28,333 INFO L225 Difference]: With dead ends: 681 [2021-06-12 19:58:28,333 INFO L226 Difference]: Without dead ends: 654 [2021-06-12 19:58:28,334 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 402.6ms TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:58:28,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-06-12 19:58:28,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 400. [2021-06-12 19:58:28,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.100250626566416) internal successors, (1237), 399 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:28,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1237 transitions. [2021-06-12 19:58:28,342 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1237 transitions. Word has length 21 [2021-06-12 19:58:28,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:28,343 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 1237 transitions. [2021-06-12 19:58:28,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:28,343 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1237 transitions. [2021-06-12 19:58:28,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:28,343 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:28,343 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:28,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable768 [2021-06-12 19:58:28,544 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:28,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:28,544 INFO L82 PathProgramCache]: Analyzing trace with hash -343138925, now seen corresponding path program 231 times [2021-06-12 19:58:28,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:28,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369194368] [2021-06-12 19:58:28,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:28,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:28,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:28,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:28,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369194368] [2021-06-12 19:58:28,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369194368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:28,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330370612] [2021-06-12 19:58:28,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:28,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:58:28,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:28,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:28,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:28,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:28,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:28,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:28,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:28,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:28,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:28,711 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 19:58:28,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:28,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:28,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:28,752 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 19:58:28,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:28,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 19:58:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:28,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330370612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:28,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:28,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:58:28,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036858600] [2021-06-12 19:58:28,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:58:28,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:28,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:58:28,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:58:28,766 INFO L87 Difference]: Start difference. First operand 400 states and 1237 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:28,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:28,963 INFO L93 Difference]: Finished difference Result 534 states and 1625 transitions. [2021-06-12 19:58:28,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:28,963 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:28,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:28,964 INFO L225 Difference]: With dead ends: 534 [2021-06-12 19:58:28,964 INFO L226 Difference]: Without dead ends: 512 [2021-06-12 19:58:28,964 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 158.8ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:58:28,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-12 19:58:28,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 403. [2021-06-12 19:58:28,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.101990049751244) internal successors, (1247), 402 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:28,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1247 transitions. [2021-06-12 19:58:28,969 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1247 transitions. Word has length 21 [2021-06-12 19:58:28,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:28,969 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1247 transitions. [2021-06-12 19:58:28,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:28,969 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1247 transitions. [2021-06-12 19:58:28,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:28,970 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:28,970 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:29,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable778 [2021-06-12 19:58:29,185 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:29,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:29,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1706818721, now seen corresponding path program 232 times [2021-06-12 19:58:29,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:29,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745436228] [2021-06-12 19:58:29,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:29,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:29,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:29,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745436228] [2021-06-12 19:58:29,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745436228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:29,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971254131] [2021-06-12 19:58:29,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:29,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:29,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:29,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:29,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:29,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:29,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:29,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:29,351 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:29,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:29,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:29,360 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 19:58:29,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:29,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:29,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:29,397 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 19:58:29,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:29,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:29,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:29,407 INFO L518 ElimStorePlain]: Eliminatee v_prenex_26 vanished before elimination [2021-06-12 19:58:29,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:29,408 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:21 [2021-06-12 19:58:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:29,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971254131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:29,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:29,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 19:58:29,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400813214] [2021-06-12 19:58:29,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:58:29,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:29,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:58:29,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:58:29,430 INFO L87 Difference]: Start difference. First operand 403 states and 1247 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:29,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:29,582 INFO L93 Difference]: Finished difference Result 549 states and 1674 transitions. [2021-06-12 19:58:29,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:29,582 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:29,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:29,583 INFO L225 Difference]: With dead ends: 549 [2021-06-12 19:58:29,583 INFO L226 Difference]: Without dead ends: 520 [2021-06-12 19:58:29,583 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 142.0ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:58:29,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-12 19:58:29,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 403. [2021-06-12 19:58:29,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.101990049751244) internal successors, (1247), 402 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:29,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1247 transitions. [2021-06-12 19:58:29,588 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1247 transitions. Word has length 21 [2021-06-12 19:58:29,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:29,588 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1247 transitions. [2021-06-12 19:58:29,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:29,588 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1247 transitions. [2021-06-12 19:58:29,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:29,589 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:29,589 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:29,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable782 [2021-06-12 19:58:29,809 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:29,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:29,809 INFO L82 PathProgramCache]: Analyzing trace with hash 2004085131, now seen corresponding path program 233 times [2021-06-12 19:58:29,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:29,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934495821] [2021-06-12 19:58:29,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:29,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:29,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:29,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934495821] [2021-06-12 19:58:29,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934495821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:29,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034963089] [2021-06-12 19:58:29,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:29,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:29,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:29,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:29,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:29,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:29,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:29,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:29,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:29,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:29,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 19:58:30,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:30,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:30,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:58:30,054 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:30,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:30,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:58:30,073 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:30,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:30,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:30,091 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:22 [2021-06-12 19:58:30,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:30,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034963089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:30,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:30,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:30,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371965550] [2021-06-12 19:58:30,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:30,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:30,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:30,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:30,164 INFO L87 Difference]: Start difference. First operand 403 states and 1247 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:31,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:31,016 INFO L93 Difference]: Finished difference Result 743 states and 2231 transitions. [2021-06-12 19:58:31,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:58:31,017 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:31,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:31,017 INFO L225 Difference]: With dead ends: 743 [2021-06-12 19:58:31,017 INFO L226 Difference]: Without dead ends: 720 [2021-06-12 19:58:31,018 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 593.7ms TimeCoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:58:31,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-06-12 19:58:31,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 404. [2021-06-12 19:58:31,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.109181141439206) internal successors, (1253), 403 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:31,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1253 transitions. [2021-06-12 19:58:31,022 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1253 transitions. Word has length 21 [2021-06-12 19:58:31,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:31,023 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1253 transitions. [2021-06-12 19:58:31,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:31,023 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1253 transitions. [2021-06-12 19:58:31,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:31,023 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:31,023 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:31,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable788,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:31,224 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:31,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:31,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1719822447, now seen corresponding path program 234 times [2021-06-12 19:58:31,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:31,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828416617] [2021-06-12 19:58:31,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:31,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:31,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:31,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828416617] [2021-06-12 19:58:31,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828416617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:31,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512862005] [2021-06-12 19:58:31,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:31,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:58:31,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:31,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:31,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:31,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:31,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:31,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:31,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:31,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:31,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:31,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:58:31,447 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:48 [2021-06-12 19:58:31,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:31,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:31,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:31,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:31,501 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:31,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:31,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:31,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:58:31,519 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:31,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:31,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:31,535 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:73, output treesize:19 [2021-06-12 19:58:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:31,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512862005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:31,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:31,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:31,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520002374] [2021-06-12 19:58:31,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:31,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:31,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:31,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:31,611 INFO L87 Difference]: Start difference. First operand 404 states and 1253 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:32,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:32,183 INFO L93 Difference]: Finished difference Result 678 states and 2040 transitions. [2021-06-12 19:58:32,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:58:32,183 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:32,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:32,184 INFO L225 Difference]: With dead ends: 678 [2021-06-12 19:58:32,184 INFO L226 Difference]: Without dead ends: 651 [2021-06-12 19:58:32,184 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 493.1ms TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:58:32,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-06-12 19:58:32,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 416. [2021-06-12 19:58:32,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 3.1180722891566264) internal successors, (1294), 415 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:32,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1294 transitions. [2021-06-12 19:58:32,189 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1294 transitions. Word has length 21 [2021-06-12 19:58:32,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:32,189 INFO L482 AbstractCegarLoop]: Abstraction has 416 states and 1294 transitions. [2021-06-12 19:58:32,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:32,189 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1294 transitions. [2021-06-12 19:58:32,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:32,190 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:32,190 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:32,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable797 [2021-06-12 19:58:32,390 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:32,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:32,390 INFO L82 PathProgramCache]: Analyzing trace with hash -499455059, now seen corresponding path program 235 times [2021-06-12 19:58:32,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:32,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357394946] [2021-06-12 19:58:32,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:32,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:32,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:32,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357394946] [2021-06-12 19:58:32,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357394946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:32,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505072170] [2021-06-12 19:58:32,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:32,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:32,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:32,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:32,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:32,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:32,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:32,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:32,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:32,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:32,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:32,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:58:32,598 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:48 [2021-06-12 19:58:32,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:32,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:32,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:32,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:32,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:32,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:58:32,676 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:32,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:32,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:32,685 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:13 [2021-06-12 19:58:32,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:32,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505072170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:32,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:32,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:32,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122095894] [2021-06-12 19:58:32,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:32,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:32,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:32,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:32,731 INFO L87 Difference]: Start difference. First operand 416 states and 1294 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:33,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:33,029 INFO L93 Difference]: Finished difference Result 595 states and 1802 transitions. [2021-06-12 19:58:33,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:58:33,029 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:33,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:33,030 INFO L225 Difference]: With dead ends: 595 [2021-06-12 19:58:33,030 INFO L226 Difference]: Without dead ends: 574 [2021-06-12 19:58:33,030 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 306.8ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:58:33,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-06-12 19:58:33,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 404. [2021-06-12 19:58:33,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.106699751861042) internal successors, (1252), 403 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:33,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1252 transitions. [2021-06-12 19:58:33,034 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1252 transitions. Word has length 21 [2021-06-12 19:58:33,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:33,034 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1252 transitions. [2021-06-12 19:58:33,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:33,034 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1252 transitions. [2021-06-12 19:58:33,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:33,035 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:33,035 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:33,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable810,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:33,235 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:33,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:33,235 INFO L82 PathProgramCache]: Analyzing trace with hash -957233069, now seen corresponding path program 236 times [2021-06-12 19:58:33,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:33,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747547767] [2021-06-12 19:58:33,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:33,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:33,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:33,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:33,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747547767] [2021-06-12 19:58:33,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747547767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:33,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107184726] [2021-06-12 19:58:33,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:33,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:33,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:33,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:33,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:33,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:33,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:33,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:33,345 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:33,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:33,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:33,352 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 19:58:33,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:33,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:33,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:33,376 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:33,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:33,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 19:58:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:33,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107184726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:33,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:33,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:58:33,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374700651] [2021-06-12 19:58:33,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:58:33,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:33,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:58:33,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:58:33,385 INFO L87 Difference]: Start difference. First operand 404 states and 1252 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:33,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:33,532 INFO L93 Difference]: Finished difference Result 666 states and 2008 transitions. [2021-06-12 19:58:33,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:33,533 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:33,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:33,533 INFO L225 Difference]: With dead ends: 666 [2021-06-12 19:58:33,533 INFO L226 Difference]: Without dead ends: 644 [2021-06-12 19:58:33,533 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:58:33,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-06-12 19:58:33,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 412. [2021-06-12 19:58:33,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 3.1143552311435525) internal successors, (1280), 411 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:33,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1280 transitions. [2021-06-12 19:58:33,538 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1280 transitions. Word has length 21 [2021-06-12 19:58:33,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:33,538 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 1280 transitions. [2021-06-12 19:58:33,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:33,538 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1280 transitions. [2021-06-12 19:58:33,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:33,539 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:33,539 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:33,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable815 [2021-06-12 19:58:33,739 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:33,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:33,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1247945405, now seen corresponding path program 237 times [2021-06-12 19:58:33,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:33,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674987099] [2021-06-12 19:58:33,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:33,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:33,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:33,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674987099] [2021-06-12 19:58:33,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674987099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:33,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065468303] [2021-06-12 19:58:33,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:33,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:58:33,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:33,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:33,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:33,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:33,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:33,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:33,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:33,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:33,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:33,873 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 19:58:33,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:33,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:33,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:33,933 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:33,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:33,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 19:58:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:33,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065468303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:33,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:33,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:58:33,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431087989] [2021-06-12 19:58:33,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:33,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:33,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:33,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:33,958 INFO L87 Difference]: Start difference. First operand 412 states and 1280 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:34,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:34,649 INFO L93 Difference]: Finished difference Result 958 states and 2871 transitions. [2021-06-12 19:58:34,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:58:34,649 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:34,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:34,650 INFO L225 Difference]: With dead ends: 958 [2021-06-12 19:58:34,650 INFO L226 Difference]: Without dead ends: 939 [2021-06-12 19:58:34,650 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 541.4ms TimeCoverageRelationStatistics Valid=265, Invalid=1141, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:58:34,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-06-12 19:58:34,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 418. [2021-06-12 19:58:34,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 3.1247002398081536) internal successors, (1303), 417 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:34,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1303 transitions. [2021-06-12 19:58:34,656 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1303 transitions. Word has length 21 [2021-06-12 19:58:34,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:34,656 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 1303 transitions. [2021-06-12 19:58:34,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:34,656 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1303 transitions. [2021-06-12 19:58:34,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:34,656 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:34,657 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:34,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable818,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:34,857 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:34,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:34,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2090256769, now seen corresponding path program 238 times [2021-06-12 19:58:34,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:34,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119347855] [2021-06-12 19:58:34,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:34,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:34,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:34,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119347855] [2021-06-12 19:58:34,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119347855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:34,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513899147] [2021-06-12 19:58:34,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:34,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:34,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:34,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:34,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:34,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:34,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:34,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:34,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:34,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 19:58:35,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:35,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:35,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:58:35,054 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:35,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:35,057 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:35,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:35,057 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:5 [2021-06-12 19:58:35,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:35,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513899147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:35,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:35,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:58:35,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351013115] [2021-06-12 19:58:35,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:35,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:35,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:35,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:35,082 INFO L87 Difference]: Start difference. First operand 418 states and 1303 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:35,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:35,409 INFO L93 Difference]: Finished difference Result 709 states and 2145 transitions. [2021-06-12 19:58:35,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:58:35,409 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:35,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:35,410 INFO L225 Difference]: With dead ends: 709 [2021-06-12 19:58:35,410 INFO L226 Difference]: Without dead ends: 670 [2021-06-12 19:58:35,410 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 249.2ms TimeCoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:58:35,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-06-12 19:58:35,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 419. [2021-06-12 19:58:35,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 3.117224880382775) internal successors, (1303), 418 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:35,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1303 transitions. [2021-06-12 19:58:35,415 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1303 transitions. Word has length 21 [2021-06-12 19:58:35,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:35,415 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 1303 transitions. [2021-06-12 19:58:35,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:35,416 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1303 transitions. [2021-06-12 19:58:35,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:35,416 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:35,416 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:35,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable824,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:35,621 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:35,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:35,621 INFO L82 PathProgramCache]: Analyzing trace with hash -694754787, now seen corresponding path program 239 times [2021-06-12 19:58:35,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:35,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567357452] [2021-06-12 19:58:35,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:35,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:35,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:35,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:35,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567357452] [2021-06-12 19:58:35,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567357452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:35,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867183040] [2021-06-12 19:58:35,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:35,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:58:35,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:35,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:58:35,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:35,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:35,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:35,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:35,757 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:35,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:35,760 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:35,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:35,762 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:35,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:35,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:58:35,783 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:89, output treesize:57 [2021-06-12 19:58:35,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 19:58:35,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:35,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:35,894 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:35,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:35,902 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:35,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:35,903 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:21 [2021-06-12 19:58:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:35,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867183040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:35,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:35,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:58:35,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544455026] [2021-06-12 19:58:35,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:35,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:35,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:35,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:35,948 INFO L87 Difference]: Start difference. First operand 419 states and 1303 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:37,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:37,056 INFO L93 Difference]: Finished difference Result 1026 states and 3126 transitions. [2021-06-12 19:58:37,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 19:58:37,056 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:37,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:37,057 INFO L225 Difference]: With dead ends: 1026 [2021-06-12 19:58:37,057 INFO L226 Difference]: Without dead ends: 988 [2021-06-12 19:58:37,058 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 913.7ms TimeCoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 19:58:37,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2021-06-12 19:58:37,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 429. [2021-06-12 19:58:37,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.130841121495327) internal successors, (1340), 428 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:37,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1340 transitions. [2021-06-12 19:58:37,064 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1340 transitions. Word has length 21 [2021-06-12 19:58:37,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:37,064 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1340 transitions. [2021-06-12 19:58:37,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:37,064 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1340 transitions. [2021-06-12 19:58:37,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:37,064 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:37,064 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:37,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable827,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:37,265 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:37,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:37,265 INFO L82 PathProgramCache]: Analyzing trace with hash 991637053, now seen corresponding path program 240 times [2021-06-12 19:58:37,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:37,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887614571] [2021-06-12 19:58:37,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:37,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:37,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887614571] [2021-06-12 19:58:37,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887614571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:37,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774703702] [2021-06-12 19:58:37,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:37,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:58:37,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:37,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:37,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:37,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:37,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:37,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:37,411 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:37,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:37,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:37,418 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 19:58:37,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:37,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:37,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:37,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:37,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:37,480 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:37,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:37,480 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:13 [2021-06-12 19:58:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:37,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774703702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:37,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:37,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:58:37,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699018275] [2021-06-12 19:58:37,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:37,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:37,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:37,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:37,528 INFO L87 Difference]: Start difference. First operand 429 states and 1340 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:38,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:38,214 INFO L93 Difference]: Finished difference Result 1019 states and 3075 transitions. [2021-06-12 19:58:38,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:58:38,214 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:38,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:38,215 INFO L225 Difference]: With dead ends: 1019 [2021-06-12 19:58:38,216 INFO L226 Difference]: Without dead ends: 996 [2021-06-12 19:58:38,216 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 513.6ms TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:58:38,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-06-12 19:58:38,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 423. [2021-06-12 19:58:38,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 3.137440758293839) internal successors, (1324), 422 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:38,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1324 transitions. [2021-06-12 19:58:38,222 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1324 transitions. Word has length 21 [2021-06-12 19:58:38,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:38,222 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 1324 transitions. [2021-06-12 19:58:38,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:38,222 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1324 transitions. [2021-06-12 19:58:38,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:38,222 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:38,222 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:38,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable835,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:38,423 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:38,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:38,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1655597913, now seen corresponding path program 241 times [2021-06-12 19:58:38,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:38,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250438185] [2021-06-12 19:58:38,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:38,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:38,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:38,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250438185] [2021-06-12 19:58:38,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250438185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:38,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958385684] [2021-06-12 19:58:38,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:38,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:38,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:38,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:38,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:38,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:38,545 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:38,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:38,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:38,551 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 19:58:38,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:38,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:38,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:38,578 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:38,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:38,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 19:58:38,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:38,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958385684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:38,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:38,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:58:38,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713931405] [2021-06-12 19:58:38,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:58:38,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:38,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:58:38,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:58:38,586 INFO L87 Difference]: Start difference. First operand 423 states and 1324 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:38,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:38,703 INFO L93 Difference]: Finished difference Result 687 states and 2113 transitions. [2021-06-12 19:58:38,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:38,703 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:38,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:38,704 INFO L225 Difference]: With dead ends: 687 [2021-06-12 19:58:38,704 INFO L226 Difference]: Without dead ends: 665 [2021-06-12 19:58:38,704 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:58:38,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-06-12 19:58:38,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 426. [2021-06-12 19:58:38,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.1341176470588237) internal successors, (1332), 425 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:38,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1332 transitions. [2021-06-12 19:58:38,710 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1332 transitions. Word has length 21 [2021-06-12 19:58:38,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:38,710 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1332 transitions. [2021-06-12 19:58:38,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:38,710 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1332 transitions. [2021-06-12 19:58:38,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:38,710 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:38,710 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:38,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable842,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:38,911 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:38,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:38,911 INFO L82 PathProgramCache]: Analyzing trace with hash -758616445, now seen corresponding path program 242 times [2021-06-12 19:58:38,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:38,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632853411] [2021-06-12 19:58:38,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:38,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:39,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:39,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:39,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632853411] [2021-06-12 19:58:39,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632853411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:39,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023524493] [2021-06-12 19:58:39,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:39,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:39,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:39,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:39,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:39,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:39,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:39,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:39,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:39,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:39,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:39,073 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 19:58:39,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:39,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:39,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:39,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:39,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:39,109 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:39,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:39,110 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-12 19:58:39,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:39,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023524493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:39,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:39,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:58:39,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513600694] [2021-06-12 19:58:39,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:58:39,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:39,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:58:39,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:58:39,130 INFO L87 Difference]: Start difference. First operand 426 states and 1332 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:39,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:39,310 INFO L93 Difference]: Finished difference Result 690 states and 2115 transitions. [2021-06-12 19:58:39,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:39,311 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:39,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:39,312 INFO L225 Difference]: With dead ends: 690 [2021-06-12 19:58:39,312 INFO L226 Difference]: Without dead ends: 661 [2021-06-12 19:58:39,312 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:58:39,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-06-12 19:58:39,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 417. [2021-06-12 19:58:39,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 3.125) internal successors, (1300), 416 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:39,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1300 transitions. [2021-06-12 19:58:39,318 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1300 transitions. Word has length 21 [2021-06-12 19:58:39,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:39,319 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 1300 transitions. [2021-06-12 19:58:39,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:39,319 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1300 transitions. [2021-06-12 19:58:39,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:39,319 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:39,319 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:39,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable846 [2021-06-12 19:58:39,520 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:39,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:39,520 INFO L82 PathProgramCache]: Analyzing trace with hash -132745653, now seen corresponding path program 243 times [2021-06-12 19:58:39,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:39,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046414664] [2021-06-12 19:58:39,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:39,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:39,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:39,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046414664] [2021-06-12 19:58:39,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046414664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:39,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145509924] [2021-06-12 19:58:39,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:39,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:58:39,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:39,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:39,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:39,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:39,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:39,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:39,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:39,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 19:58:39,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:39,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:39,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:39,689 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:39,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:39,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 19:58:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:39,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145509924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:39,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:39,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:58:39,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554740252] [2021-06-12 19:58:39,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:39,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:39,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:39,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:39,713 INFO L87 Difference]: Start difference. First operand 417 states and 1300 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:40,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:40,362 INFO L93 Difference]: Finished difference Result 818 states and 2455 transitions. [2021-06-12 19:58:40,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:58:40,363 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:40,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:40,364 INFO L225 Difference]: With dead ends: 818 [2021-06-12 19:58:40,364 INFO L226 Difference]: Without dead ends: 799 [2021-06-12 19:58:40,364 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 489.8ms TimeCoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:58:40,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-06-12 19:58:40,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 417. [2021-06-12 19:58:40,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 3.105769230769231) internal successors, (1292), 416 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:40,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1292 transitions. [2021-06-12 19:58:40,370 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1292 transitions. Word has length 21 [2021-06-12 19:58:40,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:40,370 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 1292 transitions. [2021-06-12 19:58:40,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:40,370 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1292 transitions. [2021-06-12 19:58:40,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:40,371 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:40,371 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:40,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable851 [2021-06-12 19:58:40,577 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:40,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:40,577 INFO L82 PathProgramCache]: Analyzing trace with hash 65870971, now seen corresponding path program 244 times [2021-06-12 19:58:40,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:40,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143033480] [2021-06-12 19:58:40,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:40,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:40,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:40,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143033480] [2021-06-12 19:58:40,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143033480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:40,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719444594] [2021-06-12 19:58:40,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:40,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:40,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:40,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:40,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:40,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:40,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:40,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:40,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:40,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 19:58:40,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:40,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:40,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:40,728 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:40,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:40,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 19:58:40,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:40,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719444594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:40,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:40,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:58:40,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654663984] [2021-06-12 19:58:40,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:58:40,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:40,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:58:40,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:58:40,741 INFO L87 Difference]: Start difference. First operand 417 states and 1292 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:40,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:40,847 INFO L93 Difference]: Finished difference Result 540 states and 1648 transitions. [2021-06-12 19:58:40,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:40,848 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:40,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:40,849 INFO L225 Difference]: With dead ends: 540 [2021-06-12 19:58:40,849 INFO L226 Difference]: Without dead ends: 521 [2021-06-12 19:58:40,849 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:58:40,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-12 19:58:40,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 418. [2021-06-12 19:58:40,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 3.117505995203837) internal successors, (1300), 417 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:40,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1300 transitions. [2021-06-12 19:58:40,855 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1300 transitions. Word has length 21 [2021-06-12 19:58:40,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:40,855 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 1300 transitions. [2021-06-12 19:58:40,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:40,855 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1300 transitions. [2021-06-12 19:58:40,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:40,856 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:40,856 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:41,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable853 [2021-06-12 19:58:41,057 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:41,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:41,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1174020435, now seen corresponding path program 245 times [2021-06-12 19:58:41,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:41,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966132332] [2021-06-12 19:58:41,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:41,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:41,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:41,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:41,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966132332] [2021-06-12 19:58:41,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966132332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:41,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887192943] [2021-06-12 19:58:41,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:41,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:41,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:41,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:41,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:41,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:41,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:41,192 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:41,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:41,199 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 19:58:41,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:41,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:41,214 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:41,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 19:58:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:41,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887192943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:41,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:41,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:58:41,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209329380] [2021-06-12 19:58:41,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:58:41,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:41,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:58:41,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:58:41,223 INFO L87 Difference]: Start difference. First operand 418 states and 1300 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:41,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:41,353 INFO L93 Difference]: Finished difference Result 535 states and 1640 transitions. [2021-06-12 19:58:41,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:41,353 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:41,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:41,354 INFO L225 Difference]: With dead ends: 535 [2021-06-12 19:58:41,354 INFO L226 Difference]: Without dead ends: 513 [2021-06-12 19:58:41,354 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:58:41,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-12 19:58:41,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 425. [2021-06-12 19:58:41,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 3.1202830188679247) internal successors, (1323), 424 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:41,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1323 transitions. [2021-06-12 19:58:41,358 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1323 transitions. Word has length 21 [2021-06-12 19:58:41,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:41,358 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 1323 transitions. [2021-06-12 19:58:41,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:41,359 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1323 transitions. [2021-06-12 19:58:41,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:41,359 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:41,359 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:41,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable855,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:41,560 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:41,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:41,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1598092345, now seen corresponding path program 246 times [2021-06-12 19:58:41,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:41,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751661587] [2021-06-12 19:58:41,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:41,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:41,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:41,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:41,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751661587] [2021-06-12 19:58:41,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751661587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:41,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086038882] [2021-06-12 19:58:41,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:41,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:58:41,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:41,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:41,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:41,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:41,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:41,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 19:58:41,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:41,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:58:41,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:41,732 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:41,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:41,733 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:5 [2021-06-12 19:58:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:41,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086038882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:41,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:41,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:58:41,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261584655] [2021-06-12 19:58:41,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:58:41,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:41,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:58:41,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:58:41,748 INFO L87 Difference]: Start difference. First operand 425 states and 1323 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:41,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:41,883 INFO L93 Difference]: Finished difference Result 544 states and 1666 transitions. [2021-06-12 19:58:41,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:41,883 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:41,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:41,884 INFO L225 Difference]: With dead ends: 544 [2021-06-12 19:58:41,884 INFO L226 Difference]: Without dead ends: 511 [2021-06-12 19:58:41,884 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:58:41,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-06-12 19:58:41,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 425. [2021-06-12 19:58:41,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 3.1132075471698113) internal successors, (1320), 424 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:41,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1320 transitions. [2021-06-12 19:58:41,889 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1320 transitions. Word has length 21 [2021-06-12 19:58:41,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:41,889 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 1320 transitions. [2021-06-12 19:58:41,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:41,889 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1320 transitions. [2021-06-12 19:58:41,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:41,889 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:41,889 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:42,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable858,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:42,090 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:42,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:42,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1240193923, now seen corresponding path program 247 times [2021-06-12 19:58:42,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:42,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742463506] [2021-06-12 19:58:42,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:42,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:42,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:42,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:42,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742463506] [2021-06-12 19:58:42,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742463506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:42,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516059767] [2021-06-12 19:58:42,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:42,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:42,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:42,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:42,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:42,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:42,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:42,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:42,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:42,224 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 19:58:42,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:42,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:42,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:42,238 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:42,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:42,244 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:42,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:42,244 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-12 19:58:42,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:42,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516059767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:42,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:42,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:58:42,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095526158] [2021-06-12 19:58:42,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:58:42,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:42,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:58:42,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:58:42,261 INFO L87 Difference]: Start difference. First operand 425 states and 1320 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:42,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:42,384 INFO L93 Difference]: Finished difference Result 571 states and 1757 transitions. [2021-06-12 19:58:42,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:42,384 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:42,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:42,385 INFO L225 Difference]: With dead ends: 571 [2021-06-12 19:58:42,385 INFO L226 Difference]: Without dead ends: 542 [2021-06-12 19:58:42,385 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:58:42,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-12 19:58:42,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 425. [2021-06-12 19:58:42,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 3.1132075471698113) internal successors, (1320), 424 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:42,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1320 transitions. [2021-06-12 19:58:42,390 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1320 transitions. Word has length 21 [2021-06-12 19:58:42,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:42,390 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 1320 transitions. [2021-06-12 19:58:42,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:42,390 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1320 transitions. [2021-06-12 19:58:42,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:42,390 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:42,390 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:42,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable861 [2021-06-12 19:58:42,591 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:42,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:42,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1960074455, now seen corresponding path program 248 times [2021-06-12 19:58:42,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:42,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553775957] [2021-06-12 19:58:42,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:42,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:42,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553775957] [2021-06-12 19:58:42,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553775957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:42,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740074614] [2021-06-12 19:58:42,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:42,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:42,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:42,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:42,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:42,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:42,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:42,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:42,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:42,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 19:58:42,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:42,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:42,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:58:42,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:42,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:42,756 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:42,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:42,757 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 19:58:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:42,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740074614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:42,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:42,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:58:42,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104278753] [2021-06-12 19:58:42,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:58:42,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:42,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:58:42,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:58:42,786 INFO L87 Difference]: Start difference. First operand 425 states and 1320 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:42,969 INFO L93 Difference]: Finished difference Result 531 states and 1632 transitions. [2021-06-12 19:58:42,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:42,969 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:42,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:42,970 INFO L225 Difference]: With dead ends: 531 [2021-06-12 19:58:42,970 INFO L226 Difference]: Without dead ends: 504 [2021-06-12 19:58:42,970 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 120.4ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:58:42,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-12 19:58:42,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 422. [2021-06-12 19:58:42,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.116389548693587) internal successors, (1312), 421 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:42,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1312 transitions. [2021-06-12 19:58:42,974 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1312 transitions. Word has length 21 [2021-06-12 19:58:42,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:42,974 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 1312 transitions. [2021-06-12 19:58:42,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:42,974 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1312 transitions. [2021-06-12 19:58:42,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:42,975 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:42,975 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:43,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable865 [2021-06-12 19:58:43,175 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:43,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:43,176 INFO L82 PathProgramCache]: Analyzing trace with hash 866590197, now seen corresponding path program 249 times [2021-06-12 19:58:43,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:43,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458560831] [2021-06-12 19:58:43,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:43,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:43,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458560831] [2021-06-12 19:58:43,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458560831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:43,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187352037] [2021-06-12 19:58:43,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:43,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:58:43,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:43,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:43,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:43,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:43,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:43,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:43,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:43,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:19 [2021-06-12 19:58:43,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 19:58:43,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:43,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 19:58:43,333 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:43,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:43,339 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:43,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:43,340 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-12 19:58:43,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:43,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187352037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:43,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:43,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:58:43,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861108875] [2021-06-12 19:58:43,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:58:43,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:43,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:58:43,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:58:43,356 INFO L87 Difference]: Start difference. First operand 422 states and 1312 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:43,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:43,482 INFO L93 Difference]: Finished difference Result 549 states and 1680 transitions. [2021-06-12 19:58:43,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:43,482 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:43,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:43,483 INFO L225 Difference]: With dead ends: 549 [2021-06-12 19:58:43,483 INFO L226 Difference]: Without dead ends: 513 [2021-06-12 19:58:43,483 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:58:43,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-12 19:58:43,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 425. [2021-06-12 19:58:43,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 3.1179245283018866) internal successors, (1322), 424 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:43,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1322 transitions. [2021-06-12 19:58:43,487 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1322 transitions. Word has length 21 [2021-06-12 19:58:43,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:43,487 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 1322 transitions. [2021-06-12 19:58:43,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:43,487 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1322 transitions. [2021-06-12 19:58:43,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:43,488 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:43,488 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:43,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable871 [2021-06-12 19:58:43,688 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:43,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:43,689 INFO L82 PathProgramCache]: Analyzing trace with hash -228108721, now seen corresponding path program 250 times [2021-06-12 19:58:43,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:43,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479254443] [2021-06-12 19:58:43,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:43,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:43,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:43,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479254443] [2021-06-12 19:58:43,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479254443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:43,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119001323] [2021-06-12 19:58:43,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:43,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:43,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:43,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:43,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:43,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:43,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:43,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:43,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:43,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:43,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:43,872 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 19:58:43,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:43,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:43,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:43,912 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:43,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:43,915 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:43,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:43,923 INFO L518 ElimStorePlain]: Eliminatee v_prenex_27 vanished before elimination [2021-06-12 19:58:43,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:43,923 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:13 [2021-06-12 19:58:43,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:43,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119001323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:43,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:43,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:58:43,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887361295] [2021-06-12 19:58:43,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:58:43,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:43,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:58:43,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:58:43,961 INFO L87 Difference]: Start difference. First operand 425 states and 1322 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:44,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:44,186 INFO L93 Difference]: Finished difference Result 590 states and 1797 transitions. [2021-06-12 19:58:44,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:58:44,186 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:44,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:44,187 INFO L225 Difference]: With dead ends: 590 [2021-06-12 19:58:44,187 INFO L226 Difference]: Without dead ends: 563 [2021-06-12 19:58:44,187 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:44,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-12 19:58:44,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 441. [2021-06-12 19:58:44,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 3.1204545454545456) internal successors, (1373), 440 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:44,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1373 transitions. [2021-06-12 19:58:44,192 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1373 transitions. Word has length 21 [2021-06-12 19:58:44,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:44,192 INFO L482 AbstractCegarLoop]: Abstraction has 441 states and 1373 transitions. [2021-06-12 19:58:44,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:44,192 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1373 transitions. [2021-06-12 19:58:44,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:44,193 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:44,193 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:44,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable874,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:44,393 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:44,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:44,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1652644217, now seen corresponding path program 251 times [2021-06-12 19:58:44,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:44,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269572022] [2021-06-12 19:58:44,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:44,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:44,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269572022] [2021-06-12 19:58:44,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269572022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:44,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298696803] [2021-06-12 19:58:44,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:44,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:58:44,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:44,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:58:44,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:44,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:44,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:44,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:44,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:44,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:44,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:44,541 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 19:58:44,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:44,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:44,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:44,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:44,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:44,586 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:44,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:44,587 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:25 [2021-06-12 19:58:44,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:44,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298696803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:44,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:44,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:58:44,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067132234] [2021-06-12 19:58:44,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:58:44,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:44,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:58:44,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:58:44,635 INFO L87 Difference]: Start difference. First operand 441 states and 1373 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:44,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:44,909 INFO L93 Difference]: Finished difference Result 540 states and 1644 transitions. [2021-06-12 19:58:44,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:58:44,909 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:44,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:44,910 INFO L225 Difference]: With dead ends: 540 [2021-06-12 19:58:44,910 INFO L226 Difference]: Without dead ends: 519 [2021-06-12 19:58:44,910 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:58:44,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-12 19:58:44,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 434. [2021-06-12 19:58:44,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.1247113163972284) internal successors, (1353), 433 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:44,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1353 transitions. [2021-06-12 19:58:44,919 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1353 transitions. Word has length 21 [2021-06-12 19:58:44,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:44,919 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 1353 transitions. [2021-06-12 19:58:44,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:44,919 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1353 transitions. [2021-06-12 19:58:44,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:44,919 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:44,919 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:45,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable882 [2021-06-12 19:58:45,120 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:45,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:45,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1434637307, now seen corresponding path program 252 times [2021-06-12 19:58:45,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:45,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244056993] [2021-06-12 19:58:45,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:45,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:45,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244056993] [2021-06-12 19:58:45,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244056993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:45,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066216485] [2021-06-12 19:58:45,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:45,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:58:45,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:45,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:45,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:45,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:45,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:45,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:45,271 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:45,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:45,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:45,280 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 19:58:45,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:45,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:45,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:45,332 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:45,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:45,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 19:58:45,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:45,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066216485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:45,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:45,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:58:45,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454086732] [2021-06-12 19:58:45,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:58:45,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:45,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:58:45,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:58:45,341 INFO L87 Difference]: Start difference. First operand 434 states and 1353 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:45,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:45,479 INFO L93 Difference]: Finished difference Result 568 states and 1737 transitions. [2021-06-12 19:58:45,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:45,480 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:45,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:45,481 INFO L225 Difference]: With dead ends: 568 [2021-06-12 19:58:45,481 INFO L226 Difference]: Without dead ends: 546 [2021-06-12 19:58:45,481 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 122.8ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:58:45,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-12 19:58:45,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 441. [2021-06-12 19:58:45,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 3.1386363636363637) internal successors, (1381), 440 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:45,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1381 transitions. [2021-06-12 19:58:45,486 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1381 transitions. Word has length 21 [2021-06-12 19:58:45,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:45,486 INFO L482 AbstractCegarLoop]: Abstraction has 441 states and 1381 transitions. [2021-06-12 19:58:45,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:45,486 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1381 transitions. [2021-06-12 19:58:45,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:45,486 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:45,486 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:45,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable887 [2021-06-12 19:58:45,687 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:45,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:45,687 INFO L82 PathProgramCache]: Analyzing trace with hash 932845971, now seen corresponding path program 253 times [2021-06-12 19:58:45,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:45,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254372993] [2021-06-12 19:58:45,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:45,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:45,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:45,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:45,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254372993] [2021-06-12 19:58:45,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254372993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:45,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233275199] [2021-06-12 19:58:45,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:45,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:45,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:45,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:45,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:45,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:45,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:45,859 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:45,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:45,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:45,868 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 19:58:45,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:45,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:45,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:45,908 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:45,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:45,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 19:58:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:45,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233275199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:45,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:45,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:58:45,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617274843] [2021-06-12 19:58:45,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:58:45,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:45,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:58:45,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:58:45,922 INFO L87 Difference]: Start difference. First operand 441 states and 1381 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:46,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:46,080 INFO L93 Difference]: Finished difference Result 559 states and 1713 transitions. [2021-06-12 19:58:46,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:46,080 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:46,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:46,081 INFO L225 Difference]: With dead ends: 559 [2021-06-12 19:58:46,081 INFO L226 Difference]: Without dead ends: 537 [2021-06-12 19:58:46,081 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 122.5ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:58:46,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-06-12 19:58:46,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 438. [2021-06-12 19:58:46,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.1327231121281462) internal successors, (1369), 437 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:46,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1369 transitions. [2021-06-12 19:58:46,086 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1369 transitions. Word has length 21 [2021-06-12 19:58:46,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:46,086 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1369 transitions. [2021-06-12 19:58:46,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:46,086 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1369 transitions. [2021-06-12 19:58:46,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:46,086 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:46,086 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:46,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable890,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:46,287 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:46,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:46,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1837752813, now seen corresponding path program 254 times [2021-06-12 19:58:46,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:46,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539617764] [2021-06-12 19:58:46,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:46,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:46,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:46,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539617764] [2021-06-12 19:58:46,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539617764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:46,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014809404] [2021-06-12 19:58:46,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:46,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:46,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:46,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:46,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:46,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:46,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:46,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:46,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:46,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:58:46,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:46,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:46,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:58:46,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:46,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:46,512 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:46,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:46,513 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:5 [2021-06-12 19:58:46,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:46,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014809404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:46,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:46,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:58:46,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397483440] [2021-06-12 19:58:46,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:46,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:46,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:46,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:46,544 INFO L87 Difference]: Start difference. First operand 438 states and 1369 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:46,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:46,810 INFO L93 Difference]: Finished difference Result 714 states and 2149 transitions. [2021-06-12 19:58:46,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:58:46,811 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:46,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:46,812 INFO L225 Difference]: With dead ends: 714 [2021-06-12 19:58:46,812 INFO L226 Difference]: Without dead ends: 654 [2021-06-12 19:58:46,812 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 212.2ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:58:46,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-06-12 19:58:46,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 438. [2021-06-12 19:58:46,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.125858123569794) internal successors, (1366), 437 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:46,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1366 transitions. [2021-06-12 19:58:46,817 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1366 transitions. Word has length 21 [2021-06-12 19:58:46,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:46,817 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1366 transitions. [2021-06-12 19:58:46,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:46,817 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1366 transitions. [2021-06-12 19:58:46,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:46,817 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:46,817 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:47,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable893 [2021-06-12 19:58:47,018 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:47,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:47,018 INFO L82 PathProgramCache]: Analyzing trace with hash 19262995, now seen corresponding path program 255 times [2021-06-12 19:58:47,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:47,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934978160] [2021-06-12 19:58:47,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:47,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:47,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:47,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934978160] [2021-06-12 19:58:47,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934978160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:47,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548271309] [2021-06-12 19:58:47,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:47,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:58:47,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:47,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:47,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:47,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:47,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:47,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:47,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:47,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:47,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:47,240 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 19:58:47,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:47,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:47,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:47,296 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:47,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:47,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:47,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:47,304 INFO L518 ElimStorePlain]: Eliminatee v_prenex_29 vanished before elimination [2021-06-12 19:58:47,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:47,305 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:15 [2021-06-12 19:58:47,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:47,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548271309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:47,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:47,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:58:47,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18702454] [2021-06-12 19:58:47,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:58:47,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:47,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:58:47,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:58:47,330 INFO L87 Difference]: Start difference. First operand 438 states and 1366 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:47,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:47,496 INFO L93 Difference]: Finished difference Result 600 states and 1841 transitions. [2021-06-12 19:58:47,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:47,496 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:47,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:47,497 INFO L225 Difference]: With dead ends: 600 [2021-06-12 19:58:47,497 INFO L226 Difference]: Without dead ends: 571 [2021-06-12 19:58:47,497 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 144.1ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:58:47,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-12 19:58:47,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 438. [2021-06-12 19:58:47,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.125858123569794) internal successors, (1366), 437 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:47,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1366 transitions. [2021-06-12 19:58:47,502 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1366 transitions. Word has length 21 [2021-06-12 19:58:47,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:47,502 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1366 transitions. [2021-06-12 19:58:47,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:47,502 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1366 transitions. [2021-06-12 19:58:47,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:47,502 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:47,502 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:47,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable896,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:47,703 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:47,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:47,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1075435923, now seen corresponding path program 256 times [2021-06-12 19:58:47,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:47,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841917803] [2021-06-12 19:58:47,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:47,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:47,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:47,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841917803] [2021-06-12 19:58:47,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841917803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:47,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058683358] [2021-06-12 19:58:47,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:47,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:47,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:47,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:47,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:47,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:47,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:47,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:47,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:47,870 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:58:47,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:47,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:47,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:58:47,909 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:47,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:47,915 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:47,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:47,916 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 19:58:47,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:47,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058683358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:47,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:47,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:58:47,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268067298] [2021-06-12 19:58:47,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:58:47,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:47,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:58:47,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:58:47,934 INFO L87 Difference]: Start difference. First operand 438 states and 1366 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:48,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:48,087 INFO L93 Difference]: Finished difference Result 567 states and 1733 transitions. [2021-06-12 19:58:48,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:48,087 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:48,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:48,088 INFO L225 Difference]: With dead ends: 567 [2021-06-12 19:58:48,088 INFO L226 Difference]: Without dead ends: 540 [2021-06-12 19:58:48,088 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 135.0ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:58:48,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-12 19:58:48,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 435. [2021-06-12 19:58:48,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.129032258064516) internal successors, (1358), 434 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:48,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1358 transitions. [2021-06-12 19:58:48,093 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1358 transitions. Word has length 21 [2021-06-12 19:58:48,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:48,093 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 1358 transitions. [2021-06-12 19:58:48,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:48,093 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1358 transitions. [2021-06-12 19:58:48,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:48,093 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:48,093 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:48,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable904,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:48,295 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:48,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:48,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1699721687, now seen corresponding path program 257 times [2021-06-12 19:58:48,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:48,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029598859] [2021-06-12 19:58:48,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:48,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:48,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029598859] [2021-06-12 19:58:48,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029598859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:48,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591705182] [2021-06-12 19:58:48,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:48,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:58:48,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:48,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:48,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:48,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:48,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:48,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:48,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:48,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:48,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:48,481 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 19:58:48,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:48,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:48,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:48,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:48,529 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:48,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:48,540 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:48,540 INFO L518 ElimStorePlain]: Eliminatee v_prenex_31 vanished before elimination [2021-06-12 19:58:48,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:48,540 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:21 [2021-06-12 19:58:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:48,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591705182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:48,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:48,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:58:48,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927309177] [2021-06-12 19:58:48,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:58:48,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:48,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:58:48,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:58:48,585 INFO L87 Difference]: Start difference. First operand 435 states and 1358 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:48,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:48,746 INFO L93 Difference]: Finished difference Result 597 states and 1833 transitions. [2021-06-12 19:58:48,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:48,746 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:48,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:48,747 INFO L225 Difference]: With dead ends: 597 [2021-06-12 19:58:48,747 INFO L226 Difference]: Without dead ends: 568 [2021-06-12 19:58:48,747 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 145.0ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:58:48,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-06-12 19:58:48,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 436. [2021-06-12 19:58:48,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 3.135632183908046) internal successors, (1364), 435 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:48,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1364 transitions. [2021-06-12 19:58:48,752 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1364 transitions. Word has length 21 [2021-06-12 19:58:48,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:48,752 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 1364 transitions. [2021-06-12 19:58:48,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:48,752 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1364 transitions. [2021-06-12 19:58:48,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:48,752 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:48,752 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:48,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable908 [2021-06-12 19:58:48,954 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:48,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:48,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1686717961, now seen corresponding path program 258 times [2021-06-12 19:58:48,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:48,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567995039] [2021-06-12 19:58:48,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:49,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:49,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567995039] [2021-06-12 19:58:49,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567995039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:49,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287888025] [2021-06-12 19:58:49,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:49,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:58:49,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:49,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:49,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:49,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:49,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:49,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:49,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:49,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 19:58:49,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:58:49,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:49,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:49,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:49,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:49,150 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:49,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:49,151 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:45, output treesize:19 [2021-06-12 19:58:49,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:49,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287888025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:49,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:49,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:58:49,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943287478] [2021-06-12 19:58:49,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:49,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:49,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:49,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:49,223 INFO L87 Difference]: Start difference. First operand 436 states and 1364 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:49,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:49,525 INFO L93 Difference]: Finished difference Result 618 states and 1883 transitions. [2021-06-12 19:58:49,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:58:49,525 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:49,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:49,526 INFO L225 Difference]: With dead ends: 618 [2021-06-12 19:58:49,526 INFO L226 Difference]: Without dead ends: 591 [2021-06-12 19:58:49,526 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 259.0ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:58:49,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-12 19:58:49,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 434. [2021-06-12 19:58:49,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.1247113163972284) internal successors, (1353), 433 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:49,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1353 transitions. [2021-06-12 19:58:49,533 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1353 transitions. Word has length 21 [2021-06-12 19:58:49,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:49,533 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 1353 transitions. [2021-06-12 19:58:49,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:49,533 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1353 transitions. [2021-06-12 19:58:49,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:49,534 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:49,534 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:49,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable913 [2021-06-12 19:58:49,753 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:49,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:49,753 INFO L82 PathProgramCache]: Analyzing trace with hash -231235301, now seen corresponding path program 259 times [2021-06-12 19:58:49,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:49,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833066333] [2021-06-12 19:58:49,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:49,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:49,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:49,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833066333] [2021-06-12 19:58:49,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833066333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:49,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655656146] [2021-06-12 19:58:49,843 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:49,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:49,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:49,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:49,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:49,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:49,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:49,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 19:58:49,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:49,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:49,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:49,952 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:49,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:49,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 19:58:49,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:49,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655656146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:49,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:49,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:58:49,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441124022] [2021-06-12 19:58:49,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:58:49,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:49,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:58:49,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:58:49,965 INFO L87 Difference]: Start difference. First operand 434 states and 1353 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:50,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:50,104 INFO L93 Difference]: Finished difference Result 588 states and 1799 transitions. [2021-06-12 19:58:50,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:50,104 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:50,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:50,105 INFO L225 Difference]: With dead ends: 588 [2021-06-12 19:58:50,105 INFO L226 Difference]: Without dead ends: 569 [2021-06-12 19:58:50,105 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 129.6ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:58:50,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-06-12 19:58:50,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 434. [2021-06-12 19:58:50,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.1247113163972284) internal successors, (1353), 433 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:50,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1353 transitions. [2021-06-12 19:58:50,110 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1353 transitions. Word has length 21 [2021-06-12 19:58:50,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:50,110 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 1353 transitions. [2021-06-12 19:58:50,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:50,110 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1353 transitions. [2021-06-12 19:58:50,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:50,110 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:50,110 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:50,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable922,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:50,311 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:50,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:50,311 INFO L82 PathProgramCache]: Analyzing trace with hash -851099215, now seen corresponding path program 260 times [2021-06-12 19:58:50,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:50,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673542847] [2021-06-12 19:58:50,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:50,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:50,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:50,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673542847] [2021-06-12 19:58:50,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673542847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:50,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356832659] [2021-06-12 19:58:50,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:50,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:50,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:50,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:50,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:50,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:50,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:50,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:50,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:50,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-06-12 19:58:50,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 19:58:50,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:50,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 19:58:50,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:50,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:50,489 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:50,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:50,490 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-06-12 19:58:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:50,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356832659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:50,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:50,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:58:50,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842133105] [2021-06-12 19:58:50,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:58:50,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:50,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:58:50,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:58:50,524 INFO L87 Difference]: Start difference. First operand 434 states and 1353 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:50,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:50,706 INFO L93 Difference]: Finished difference Result 560 states and 1715 transitions. [2021-06-12 19:58:50,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:50,706 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:50,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:50,707 INFO L225 Difference]: With dead ends: 560 [2021-06-12 19:58:50,707 INFO L226 Difference]: Without dead ends: 531 [2021-06-12 19:58:50,707 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:58:50,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-12 19:58:50,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 432. [2021-06-12 19:58:50,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.1276102088167055) internal successors, (1348), 431 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:50,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1348 transitions. [2021-06-12 19:58:50,711 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1348 transitions. Word has length 21 [2021-06-12 19:58:50,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:50,711 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 1348 transitions. [2021-06-12 19:58:50,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:50,712 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1348 transitions. [2021-06-12 19:58:50,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:50,712 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:50,712 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:50,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable925 [2021-06-12 19:58:50,913 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:50,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:50,913 INFO L82 PathProgramCache]: Analyzing trace with hash -553832805, now seen corresponding path program 261 times [2021-06-12 19:58:50,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:50,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336027450] [2021-06-12 19:58:50,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:50,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:51,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:51,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336027450] [2021-06-12 19:58:51,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336027450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:51,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70451730] [2021-06-12 19:58:51,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:51,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:58:51,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:51,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:51,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:51,125 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[v_prenex_33]} [2021-06-12 19:58:51,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:51,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:51,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:51,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:51,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:51,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:51,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:51,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:58:51,157 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:50, output treesize:34 [2021-06-12 19:58:51,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:51,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:51,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:51,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:51,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:51,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:51,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:51,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:51,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:58:51,222 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:51,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:51,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:51,237 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:62, output treesize:19 [2021-06-12 19:58:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:51,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70451730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:51,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:51,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:51,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662106598] [2021-06-12 19:58:51,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:51,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:51,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:51,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:51,314 INFO L87 Difference]: Start difference. First operand 432 states and 1348 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:51,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:51,680 INFO L93 Difference]: Finished difference Result 738 states and 2235 transitions. [2021-06-12 19:58:51,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:58:51,680 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:51,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:51,681 INFO L225 Difference]: With dead ends: 738 [2021-06-12 19:58:51,682 INFO L226 Difference]: Without dead ends: 715 [2021-06-12 19:58:51,682 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 360.0ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:58:51,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-06-12 19:58:51,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 438. [2021-06-12 19:58:51,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.137299771167048) internal successors, (1371), 437 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:51,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1371 transitions. [2021-06-12 19:58:51,687 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1371 transitions. Word has length 21 [2021-06-12 19:58:51,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:51,687 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1371 transitions. [2021-06-12 19:58:51,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:51,687 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1371 transitions. [2021-06-12 19:58:51,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:51,687 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:51,688 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:51,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable928,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:51,888 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:51,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:51,888 INFO L82 PathProgramCache]: Analyzing trace with hash -838095489, now seen corresponding path program 262 times [2021-06-12 19:58:51,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:51,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528389926] [2021-06-12 19:58:51,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:51,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:51,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:51,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:51,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528389926] [2021-06-12 19:58:51,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528389926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:51,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739164469] [2021-06-12 19:58:51,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:51,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:51,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:51,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:52,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:52,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:52,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:52,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:52,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:52,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:52,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:52,056 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 19:58:52,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:52,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:52,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:52,095 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:52,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:52,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:52,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:52,115 INFO L518 ElimStorePlain]: Eliminatee v_prenex_34 vanished before elimination [2021-06-12 19:58:52,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:52,115 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:19 [2021-06-12 19:58:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:52,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739164469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:52,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:52,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:58:52,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754335569] [2021-06-12 19:58:52,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:52,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:52,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:52,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:52,188 INFO L87 Difference]: Start difference. First operand 438 states and 1371 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:52,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:52,495 INFO L93 Difference]: Finished difference Result 660 states and 1997 transitions. [2021-06-12 19:58:52,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:58:52,495 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:52,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:52,496 INFO L225 Difference]: With dead ends: 660 [2021-06-12 19:58:52,496 INFO L226 Difference]: Without dead ends: 633 [2021-06-12 19:58:52,496 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 263.0ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:58:52,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-12 19:58:52,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 449. [2021-06-12 19:58:52,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 3.140625) internal successors, (1407), 448 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:52,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1407 transitions. [2021-06-12 19:58:52,501 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1407 transitions. Word has length 21 [2021-06-12 19:58:52,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:52,501 INFO L482 AbstractCegarLoop]: Abstraction has 449 states and 1407 transitions. [2021-06-12 19:58:52,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:52,501 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1407 transitions. [2021-06-12 19:58:52,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:52,502 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:52,502 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:52,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable938,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:52,702 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:52,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:52,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1496124841, now seen corresponding path program 263 times [2021-06-12 19:58:52,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:52,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743727592] [2021-06-12 19:58:52,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:52,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:52,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:52,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743727592] [2021-06-12 19:58:52,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743727592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:52,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585888104] [2021-06-12 19:58:52,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:52,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:58:52,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:52,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:58:52,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:52,912 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[v_prenex_36]} [2021-06-12 19:58:52,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:52,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:52,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:52,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:52,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:52,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:52,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:58:52,944 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:50, output treesize:34 [2021-06-12 19:58:52,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:52,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:53,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:53,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:53,001 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:53,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:53,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:53,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:53,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:58:53,030 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:53,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:53,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:58:53,033 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:53,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:53,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:53,058 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:31 [2021-06-12 19:58:53,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:53,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585888104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:53,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:53,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:53,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814904659] [2021-06-12 19:58:53,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:53,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:53,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:53,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:53,134 INFO L87 Difference]: Start difference. First operand 449 states and 1407 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:53,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:53,547 INFO L93 Difference]: Finished difference Result 698 states and 2134 transitions. [2021-06-12 19:58:53,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:58:53,547 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:53,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:53,548 INFO L225 Difference]: With dead ends: 698 [2021-06-12 19:58:53,548 INFO L226 Difference]: Without dead ends: 679 [2021-06-12 19:58:53,548 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 416.7ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:58:53,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-06-12 19:58:53,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 446. [2021-06-12 19:58:53,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 3.134831460674157) internal successors, (1395), 445 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:53,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1395 transitions. [2021-06-12 19:58:53,553 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1395 transitions. Word has length 21 [2021-06-12 19:58:53,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:53,553 INFO L482 AbstractCegarLoop]: Abstraction has 446 states and 1395 transitions. [2021-06-12 19:58:53,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:53,553 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1395 transitions. [2021-06-12 19:58:53,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:53,554 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:53,554 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:53,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable949 [2021-06-12 19:58:53,754 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:53,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:53,754 INFO L82 PathProgramCache]: Analyzing trace with hash 322512813, now seen corresponding path program 264 times [2021-06-12 19:58:53,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:53,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853856590] [2021-06-12 19:58:53,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:53,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:53,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:53,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853856590] [2021-06-12 19:58:53,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853856590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:53,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153158784] [2021-06-12 19:58:53,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:53,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:58:53,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:53,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:53,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:53,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:53,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:53,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:53,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:53,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:53,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:53,922 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 19:58:53,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:53,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:53,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:53,968 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:53,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:53,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 19:58:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:54,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153158784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:54,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:54,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:58:54,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289863000] [2021-06-12 19:58:54,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:54,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:54,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:54,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:54,012 INFO L87 Difference]: Start difference. First operand 446 states and 1395 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:54,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:54,216 INFO L93 Difference]: Finished difference Result 591 states and 1798 transitions. [2021-06-12 19:58:54,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:58:54,217 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:54,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:54,217 INFO L225 Difference]: With dead ends: 591 [2021-06-12 19:58:54,217 INFO L226 Difference]: Without dead ends: 570 [2021-06-12 19:58:54,217 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 199.6ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:58:54,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-12 19:58:54,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 432. [2021-06-12 19:58:54,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.1229698375870067) internal successors, (1346), 431 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:54,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1346 transitions. [2021-06-12 19:58:54,222 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1346 transitions. Word has length 21 [2021-06-12 19:58:54,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:54,222 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 1346 transitions. [2021-06-12 19:58:54,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:54,222 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1346 transitions. [2021-06-12 19:58:54,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:54,223 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:54,223 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:54,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable957,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:54,423 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:54,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:54,423 INFO L82 PathProgramCache]: Analyzing trace with hash -523816653, now seen corresponding path program 265 times [2021-06-12 19:58:54,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:54,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5288012] [2021-06-12 19:58:54,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:54,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:54,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:54,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:54,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5288012] [2021-06-12 19:58:54,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5288012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:54,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487171453] [2021-06-12 19:58:54,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:54,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:54,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:54,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:54,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:54,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:54,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:54,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:54,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:54,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:29 [2021-06-12 19:58:54,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:54,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:54,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:54,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:54,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:54,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 19:58:54,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:54,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:54,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:54,741 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:33, output treesize:9 [2021-06-12 19:58:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:54,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487171453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:54,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:54,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:58:54,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649998995] [2021-06-12 19:58:54,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:58:54,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:54,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:58:54,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:58:54,749 INFO L87 Difference]: Start difference. First operand 432 states and 1346 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:54,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:54,883 INFO L93 Difference]: Finished difference Result 506 states and 1559 transitions. [2021-06-12 19:58:54,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:54,883 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:54,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:54,884 INFO L225 Difference]: With dead ends: 506 [2021-06-12 19:58:54,884 INFO L226 Difference]: Without dead ends: 484 [2021-06-12 19:58:54,884 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:58:54,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-12 19:58:54,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 438. [2021-06-12 19:58:54,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.128146453089245) internal successors, (1367), 437 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:54,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1367 transitions. [2021-06-12 19:58:54,894 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1367 transitions. Word has length 21 [2021-06-12 19:58:54,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:54,894 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1367 transitions. [2021-06-12 19:58:54,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:54,895 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1367 transitions. [2021-06-12 19:58:54,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:54,895 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:54,895 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:55,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable960 [2021-06-12 19:58:55,095 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:55,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:55,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1025607989, now seen corresponding path program 266 times [2021-06-12 19:58:55,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:55,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843268417] [2021-06-12 19:58:55,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:55,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:55,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843268417] [2021-06-12 19:58:55,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843268417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:55,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930697724] [2021-06-12 19:58:55,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:55,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:55,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:55,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:55,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:55,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:55,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:55,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:55,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:55,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:55,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:32 [2021-06-12 19:58:55,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:55,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:55,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:55,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:55,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:55,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 19:58:55,406 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:55,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:55,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:55,414 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 19:58:55,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:55,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930697724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:55,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:55,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:58:55,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117117280] [2021-06-12 19:58:55,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:58:55,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:55,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:58:55,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:58:55,428 INFO L87 Difference]: Start difference. First operand 438 states and 1367 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:55,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:55,548 INFO L93 Difference]: Finished difference Result 515 states and 1583 transitions. [2021-06-12 19:58:55,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:55,548 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:55,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:55,549 INFO L225 Difference]: With dead ends: 515 [2021-06-12 19:58:55,549 INFO L226 Difference]: Without dead ends: 493 [2021-06-12 19:58:55,549 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 188.6ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:58:55,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-12 19:58:55,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 435. [2021-06-12 19:58:55,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.122119815668203) internal successors, (1355), 434 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:55,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1355 transitions. [2021-06-12 19:58:55,553 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1355 transitions. Word has length 21 [2021-06-12 19:58:55,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:55,553 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 1355 transitions. [2021-06-12 19:58:55,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:55,553 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1355 transitions. [2021-06-12 19:58:55,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:55,554 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:55,554 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:55,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable967,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:55,754 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:55,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:55,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1162575187, now seen corresponding path program 267 times [2021-06-12 19:58:55,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:55,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117785743] [2021-06-12 19:58:55,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:55,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:55,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:55,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117785743] [2021-06-12 19:58:55,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117785743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:55,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173633183] [2021-06-12 19:58:55,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:55,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:58:55,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:55,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:55,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:55,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:55,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:55,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:55,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:55,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:55,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 19:58:56,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:56,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:56,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:56,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:56,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:56,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 19:58:56,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:56,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:56,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:56,036 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 19:58:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:56,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173633183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:56,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:56,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:58:56,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301559788] [2021-06-12 19:58:56,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:58:56,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:56,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:58:56,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:58:56,051 INFO L87 Difference]: Start difference. First operand 435 states and 1355 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:56,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:56,190 INFO L93 Difference]: Finished difference Result 503 states and 1550 transitions. [2021-06-12 19:58:56,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:56,190 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:56,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:56,191 INFO L225 Difference]: With dead ends: 503 [2021-06-12 19:58:56,191 INFO L226 Difference]: Without dead ends: 481 [2021-06-12 19:58:56,191 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 166.3ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:58:56,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-12 19:58:56,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 432. [2021-06-12 19:58:56,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.1229698375870067) internal successors, (1346), 431 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:56,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1346 transitions. [2021-06-12 19:58:56,195 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1346 transitions. Word has length 21 [2021-06-12 19:58:56,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:56,195 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 1346 transitions. [2021-06-12 19:58:56,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:56,195 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1346 transitions. [2021-06-12 19:58:56,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:56,196 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:56,196 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:56,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable970 [2021-06-12 19:58:56,396 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:56,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:56,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1459153209, now seen corresponding path program 268 times [2021-06-12 19:58:56,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:56,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042336652] [2021-06-12 19:58:56,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:56,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:56,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:56,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042336652] [2021-06-12 19:58:56,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042336652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:56,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009179614] [2021-06-12 19:58:56,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:56,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:56,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:56,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:56,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:56,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:56,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:56,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:56,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:56,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:56,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:34 [2021-06-12 19:58:56,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:56,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:56,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:56,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:56,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:58:56,711 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:56,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:56,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:56,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:58:56,728 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:56,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:56,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:56,742 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:61, output treesize:5 [2021-06-12 19:58:56,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:56,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009179614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:56,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:56,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:56,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279528521] [2021-06-12 19:58:56,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:56,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:56,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:56,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:56,769 INFO L87 Difference]: Start difference. First operand 432 states and 1346 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:57,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:57,127 INFO L93 Difference]: Finished difference Result 714 states and 2156 transitions. [2021-06-12 19:58:57,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:58:57,127 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:57,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:57,128 INFO L225 Difference]: With dead ends: 714 [2021-06-12 19:58:57,128 INFO L226 Difference]: Without dead ends: 654 [2021-06-12 19:58:57,128 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 288.5ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:58:57,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-06-12 19:58:57,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 430. [2021-06-12 19:58:57,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.125874125874126) internal successors, (1341), 429 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:57,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1341 transitions. [2021-06-12 19:58:57,134 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1341 transitions. Word has length 21 [2021-06-12 19:58:57,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:57,134 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1341 transitions. [2021-06-12 19:58:57,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:57,134 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1341 transitions. [2021-06-12 19:58:57,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:57,134 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:57,134 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:57,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable973 [2021-06-12 19:58:57,335 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:57,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:57,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1399639067, now seen corresponding path program 269 times [2021-06-12 19:58:57,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:57,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040219589] [2021-06-12 19:58:57,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:57,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:57,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040219589] [2021-06-12 19:58:57,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040219589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:57,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850204770] [2021-06-12 19:58:57,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:57,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:57,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:57,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:57,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:57,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:57,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:57,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:57,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:57,556 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:57,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:57,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:58:57,574 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:62, output treesize:38 [2021-06-12 19:58:57,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:57,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:57,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:57,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:57,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:57,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 19:58:57,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:57,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:57,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:57,714 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:33, output treesize:9 [2021-06-12 19:58:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:57,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850204770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:57,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:57,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:58:57,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675188640] [2021-06-12 19:58:57,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:58:57,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:57,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:58:57,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:58:57,722 INFO L87 Difference]: Start difference. First operand 430 states and 1341 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:57,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:57,924 INFO L93 Difference]: Finished difference Result 553 states and 1701 transitions. [2021-06-12 19:58:57,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:57,924 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:57,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:57,925 INFO L225 Difference]: With dead ends: 553 [2021-06-12 19:58:57,925 INFO L226 Difference]: Without dead ends: 531 [2021-06-12 19:58:57,925 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 185.7ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:58:57,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-12 19:58:57,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 436. [2021-06-12 19:58:57,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 3.135632183908046) internal successors, (1364), 435 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:57,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1364 transitions. [2021-06-12 19:58:57,930 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1364 transitions. Word has length 21 [2021-06-12 19:58:57,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:57,930 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 1364 transitions. [2021-06-12 19:58:57,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:57,930 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1364 transitions. [2021-06-12 19:58:57,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:57,930 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:57,931 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:58,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable987,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:58,131 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:58,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:58,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1901430403, now seen corresponding path program 270 times [2021-06-12 19:58:58,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:58,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056400942] [2021-06-12 19:58:58,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:58,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:58,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056400942] [2021-06-12 19:58:58,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056400942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:58,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076547416] [2021-06-12 19:58:58,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:58,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:58:58,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:58,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:58,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:58,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:58,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:58,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:58,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:58,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:58,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:58,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:58:58,355 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:62, output treesize:38 [2021-06-12 19:58:58,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:58,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:58,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:58,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:58,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:58,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 19:58:58,446 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:58,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:58,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:58,453 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:12 [2021-06-12 19:58:58,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:58,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076547416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:58,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:58,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:58:58,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244917960] [2021-06-12 19:58:58,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:58:58,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:58,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:58:58,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:58:58,467 INFO L87 Difference]: Start difference. First operand 436 states and 1364 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:58,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:58,600 INFO L93 Difference]: Finished difference Result 544 states and 1677 transitions. [2021-06-12 19:58:58,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:58,601 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:58,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:58,601 INFO L225 Difference]: With dead ends: 544 [2021-06-12 19:58:58,602 INFO L226 Difference]: Without dead ends: 522 [2021-06-12 19:58:58,602 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 167.6ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:58:58,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-06-12 19:58:58,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 433. [2021-06-12 19:58:58,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.1296296296296298) internal successors, (1352), 432 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:58,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1352 transitions. [2021-06-12 19:58:58,606 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1352 transitions. Word has length 21 [2021-06-12 19:58:58,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:58,606 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1352 transitions. [2021-06-12 19:58:58,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:58,606 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1352 transitions. [2021-06-12 19:58:58,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:58,607 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:58,607 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:58,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable996 [2021-06-12 19:58:58,807 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:58,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:58,808 INFO L82 PathProgramCache]: Analyzing trace with hash -774314949, now seen corresponding path program 271 times [2021-06-12 19:58:58,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:58,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687873593] [2021-06-12 19:58:58,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:58,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:58,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687873593] [2021-06-12 19:58:58,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687873593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:58,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011898151] [2021-06-12 19:58:58,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:58,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:58,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:58,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:58,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:58,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:58,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:58,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:58,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:59,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:59,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:58:59,018 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:41 [2021-06-12 19:58:59,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:59,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:59,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:59,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:59,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:59,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:58:59,174 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:59,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:59,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:59,181 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:7 [2021-06-12 19:58:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:59,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011898151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:59,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:59,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:58:59,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621741813] [2021-06-12 19:58:59,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:58:59,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:59,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:58:59,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:58:59,189 INFO L87 Difference]: Start difference. First operand 433 states and 1352 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:59,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:59,339 INFO L93 Difference]: Finished difference Result 537 states and 1630 transitions. [2021-06-12 19:58:59,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:58:59,340 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:58:59,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:59,340 INFO L225 Difference]: With dead ends: 537 [2021-06-12 19:58:59,340 INFO L226 Difference]: Without dead ends: 518 [2021-06-12 19:58:59,340 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 197.2ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:59,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-12 19:58:59,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 432. [2021-06-12 19:58:59,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.1299303944315544) internal successors, (1349), 431 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:59,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1349 transitions. [2021-06-12 19:58:59,345 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1349 transitions. Word has length 21 [2021-06-12 19:58:59,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:59,345 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 1349 transitions. [2021-06-12 19:58:59,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:59,345 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1349 transitions. [2021-06-12 19:58:59,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:58:59,346 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:59,346 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:59,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1001,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:59,546 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:59,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:59,547 INFO L82 PathProgramCache]: Analyzing trace with hash -996523561, now seen corresponding path program 272 times [2021-06-12 19:58:59,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:59,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358019298] [2021-06-12 19:58:59,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:59,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:59,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:59,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358019298] [2021-06-12 19:58:59,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358019298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:59,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011338814] [2021-06-12 19:58:59,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:59,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:59,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:59,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:58:59,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:59,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:59,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:59,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:59,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:59,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:59,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:36 [2021-06-12 19:58:59,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:58:59,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:59,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:59,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:59,927 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:59,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:59,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:59,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:58:59,942 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:59,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:59,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:59,954 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:55, output treesize:5 [2021-06-12 19:58:59,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:59,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011338814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:59,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:59,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:59,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571725204] [2021-06-12 19:58:59,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:59,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:59,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:59,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:59,981 INFO L87 Difference]: Start difference. First operand 432 states and 1349 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:00,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:00,206 INFO L93 Difference]: Finished difference Result 674 states and 2029 transitions. [2021-06-12 19:59:00,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:59:00,206 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:00,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:00,207 INFO L225 Difference]: With dead ends: 674 [2021-06-12 19:59:00,207 INFO L226 Difference]: Without dead ends: 614 [2021-06-12 19:59:00,207 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 251.3ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:59:00,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-06-12 19:59:00,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 432. [2021-06-12 19:59:00,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.1229698375870067) internal successors, (1346), 431 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:00,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1346 transitions. [2021-06-12 19:59:00,212 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1346 transitions. Word has length 21 [2021-06-12 19:59:00,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:00,212 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 1346 transitions. [2021-06-12 19:59:00,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:00,212 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1346 transitions. [2021-06-12 19:59:00,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:00,213 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:00,213 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:00,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1018 [2021-06-12 19:59:00,413 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:00,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:00,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1086051491, now seen corresponding path program 273 times [2021-06-12 19:59:00,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:00,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363389962] [2021-06-12 19:59:00,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:00,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:00,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:00,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363389962] [2021-06-12 19:59:00,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363389962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:00,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71560915] [2021-06-12 19:59:00,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:00,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:59:00,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:00,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:00,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:00,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:00,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:00,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:00,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:00,660 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:00,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:00,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:00,679 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:41 [2021-06-12 19:59:00,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:00,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:00,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:00,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:00,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:00,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:00,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:00,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:00,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:00,779 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:10 [2021-06-12 19:59:00,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:00,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71560915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:00,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:00,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:00,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256782571] [2021-06-12 19:59:00,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:00,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:00,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:00,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:00,822 INFO L87 Difference]: Start difference. First operand 432 states and 1346 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:01,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:01,021 INFO L93 Difference]: Finished difference Result 569 states and 1730 transitions. [2021-06-12 19:59:01,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:59:01,022 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:01,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:01,022 INFO L225 Difference]: With dead ends: 569 [2021-06-12 19:59:01,022 INFO L226 Difference]: Without dead ends: 550 [2021-06-12 19:59:01,023 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 242.1ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:01,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-12 19:59:01,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 419. [2021-06-12 19:59:01,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 3.1052631578947367) internal successors, (1298), 418 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:01,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1298 transitions. [2021-06-12 19:59:01,027 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1298 transitions. Word has length 21 [2021-06-12 19:59:01,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:01,027 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 1298 transitions. [2021-06-12 19:59:01,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:01,027 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1298 transitions. [2021-06-12 19:59:01,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:01,028 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:01,028 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:01,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1034 [2021-06-12 19:59:01,228 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:01,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:01,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1479953917, now seen corresponding path program 274 times [2021-06-12 19:59:01,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:01,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905578182] [2021-06-12 19:59:01,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:01,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:01,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:01,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:01,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905578182] [2021-06-12 19:59:01,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905578182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:01,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67648387] [2021-06-12 19:59:01,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:01,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:01,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:01,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:01,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:01,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:01,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:01,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:01,453 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:01,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:01,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:01,471 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:62, output treesize:38 [2021-06-12 19:59:01,570 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_38, v_prenex_37], 1=[o_2, o_4]} [2021-06-12 19:59:01,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:01,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:01,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:01,584 INFO L518 ElimStorePlain]: Eliminatee v_prenex_37 vanished before elimination [2021-06-12 19:59:01,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:01,587 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:01,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:01,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 19:59:01,599 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:01,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:01,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:01,609 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:48, output treesize:15 [2021-06-12 19:59:01,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:01,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67648387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:01,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:01,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:59:01,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470196617] [2021-06-12 19:59:01,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:59:01,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:01,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:59:01,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:59:01,636 INFO L87 Difference]: Start difference. First operand 419 states and 1298 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:01,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:01,799 INFO L93 Difference]: Finished difference Result 550 states and 1683 transitions. [2021-06-12 19:59:01,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:01,799 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:01,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:01,800 INFO L225 Difference]: With dead ends: 550 [2021-06-12 19:59:01,800 INFO L226 Difference]: Without dead ends: 521 [2021-06-12 19:59:01,800 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:59:01,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-12 19:59:01,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 419. [2021-06-12 19:59:01,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 3.1052631578947367) internal successors, (1298), 418 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:01,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1298 transitions. [2021-06-12 19:59:01,804 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1298 transitions. Word has length 21 [2021-06-12 19:59:01,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:01,805 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 1298 transitions. [2021-06-12 19:59:01,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:01,805 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1298 transitions. [2021-06-12 19:59:01,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:01,805 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:01,805 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:02,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1040,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:02,006 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:02,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:02,006 INFO L82 PathProgramCache]: Analyzing trace with hash 385254999, now seen corresponding path program 275 times [2021-06-12 19:59:02,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:02,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463803263] [2021-06-12 19:59:02,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:02,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:02,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463803263] [2021-06-12 19:59:02,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463803263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:02,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114224514] [2021-06-12 19:59:02,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:02,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:59:02,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:02,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:02,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:02,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:02,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:02,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:02,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:02,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:02,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:39 [2021-06-12 19:59:02,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:02,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:02,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:02,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:02,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:59:02,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:02,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:02,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:02,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:02,330 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:02,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:02,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:02,348 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:71, output treesize:19 [2021-06-12 19:59:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:02,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114224514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:02,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:02,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:02,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013659702] [2021-06-12 19:59:02,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:02,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:02,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:02,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:02,398 INFO L87 Difference]: Start difference. First operand 419 states and 1298 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:02,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:02,814 INFO L93 Difference]: Finished difference Result 747 states and 2235 transitions. [2021-06-12 19:59:02,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:59:02,814 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:02,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:02,815 INFO L225 Difference]: With dead ends: 747 [2021-06-12 19:59:02,815 INFO L226 Difference]: Without dead ends: 693 [2021-06-12 19:59:02,815 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 368.3ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:59:02,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-06-12 19:59:02,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 420. [2021-06-12 19:59:02,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 3.1288782816229115) internal successors, (1311), 419 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:02,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1311 transitions. [2021-06-12 19:59:02,820 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1311 transitions. Word has length 21 [2021-06-12 19:59:02,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:02,820 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 1311 transitions. [2021-06-12 19:59:02,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:02,820 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1311 transitions. [2021-06-12 19:59:02,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:02,821 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:02,821 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:03,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1050 [2021-06-12 19:59:03,021 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:03,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:03,021 INFO L82 PathProgramCache]: Analyzing trace with hash -239030765, now seen corresponding path program 276 times [2021-06-12 19:59:03,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:03,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934942362] [2021-06-12 19:59:03,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:03,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:03,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934942362] [2021-06-12 19:59:03,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934942362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:03,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017118822] [2021-06-12 19:59:03,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:03,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:59:03,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:03,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:03,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:03,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:03,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:03,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:03,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:03,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:03,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:03,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:03,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:03,248 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:41 [2021-06-12 19:59:03,288 INFO L446 ElimStorePlain]: Different costs {0=[o_2, o_4], 1=[v_prenex_40, v_prenex_39]} [2021-06-12 19:59:03,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:03,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:03,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:03,307 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:03,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:03,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:03,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:03,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:03,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:03,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 19:59:03,326 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:03,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:03,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:03,339 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:59, output treesize:21 [2021-06-12 19:59:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:03,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017118822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:03,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:03,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:59:03,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346315463] [2021-06-12 19:59:03,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:59:03,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:03,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:59:03,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:03,374 INFO L87 Difference]: Start difference. First operand 420 states and 1311 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:03,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:03,525 INFO L93 Difference]: Finished difference Result 554 states and 1699 transitions. [2021-06-12 19:59:03,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:03,525 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:03,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:03,526 INFO L225 Difference]: With dead ends: 554 [2021-06-12 19:59:03,526 INFO L226 Difference]: Without dead ends: 525 [2021-06-12 19:59:03,526 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 168.8ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:03,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-06-12 19:59:03,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 420. [2021-06-12 19:59:03,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 3.1288782816229115) internal successors, (1311), 419 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:03,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1311 transitions. [2021-06-12 19:59:03,530 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1311 transitions. Word has length 21 [2021-06-12 19:59:03,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:03,530 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 1311 transitions. [2021-06-12 19:59:03,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:03,530 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1311 transitions. [2021-06-12 19:59:03,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:03,531 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:03,531 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:03,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1063,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:03,731 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:03,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:03,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1230358977, now seen corresponding path program 277 times [2021-06-12 19:59:03,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:03,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978348995] [2021-06-12 19:59:03,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:03,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:03,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:03,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978348995] [2021-06-12 19:59:03,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978348995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:03,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120256003] [2021-06-12 19:59:03,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:03,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:03,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:03,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:03,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:03,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:03,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:03,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:03,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:39 [2021-06-12 19:59:03,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:03,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:03,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:03,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:03,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:59:03,995 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:04,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:04,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:04,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:04,020 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:04,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:04,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:04,042 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:81, output treesize:19 [2021-06-12 19:59:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:04,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120256003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:04,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:04,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:04,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714970898] [2021-06-12 19:59:04,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:04,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:04,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:04,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:04,118 INFO L87 Difference]: Start difference. First operand 420 states and 1311 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:04,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:04,550 INFO L93 Difference]: Finished difference Result 673 states and 2025 transitions. [2021-06-12 19:59:04,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:59:04,550 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:04,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:04,551 INFO L225 Difference]: With dead ends: 673 [2021-06-12 19:59:04,551 INFO L226 Difference]: Without dead ends: 646 [2021-06-12 19:59:04,551 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 369.4ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:59:04,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-06-12 19:59:04,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 415. [2021-06-12 19:59:04,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.103864734299517) internal successors, (1285), 414 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:04,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1285 transitions. [2021-06-12 19:59:04,555 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1285 transitions. Word has length 21 [2021-06-12 19:59:04,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:04,555 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1285 transitions. [2021-06-12 19:59:04,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:04,556 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1285 transitions. [2021-06-12 19:59:04,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:04,556 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:04,556 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:04,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1070 [2021-06-12 19:59:04,756 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:04,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:04,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1157356413, now seen corresponding path program 278 times [2021-06-12 19:59:04,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:04,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734005505] [2021-06-12 19:59:04,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:04,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:04,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:04,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734005505] [2021-06-12 19:59:04,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734005505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:04,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524924808] [2021-06-12 19:59:04,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:04,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:04,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:04,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:04,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:04,958 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[v_prenex_41]} [2021-06-12 19:59:04,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:04,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:04,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:04,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:04,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:04,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:04,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:04,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:04,992 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:55, output treesize:39 [2021-06-12 19:59:05,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:05,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:05,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:05,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:05,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:05,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 19:59:05,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:05,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:05,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:05,073 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 19:59:05,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:05,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524924808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:05,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:05,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:59:05,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462227568] [2021-06-12 19:59:05,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:59:05,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:05,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:59:05,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:05,087 INFO L87 Difference]: Start difference. First operand 415 states and 1285 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:05,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:05,229 INFO L93 Difference]: Finished difference Result 526 states and 1607 transitions. [2021-06-12 19:59:05,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:05,229 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:05,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:05,230 INFO L225 Difference]: With dead ends: 526 [2021-06-12 19:59:05,230 INFO L226 Difference]: Without dead ends: 504 [2021-06-12 19:59:05,230 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 170.6ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:05,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-12 19:59:05,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 415. [2021-06-12 19:59:05,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.103864734299517) internal successors, (1285), 414 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:05,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1285 transitions. [2021-06-12 19:59:05,234 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1285 transitions. Word has length 21 [2021-06-12 19:59:05,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:05,234 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1285 transitions. [2021-06-12 19:59:05,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:05,234 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1285 transitions. [2021-06-12 19:59:05,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:05,239 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:05,239 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:05,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1080,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:05,439 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:05,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:05,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1087653237, now seen corresponding path program 279 times [2021-06-12 19:59:05,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:05,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679777718] [2021-06-12 19:59:05,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:05,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:05,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:05,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679777718] [2021-06-12 19:59:05,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679777718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:05,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502565432] [2021-06-12 19:59:05,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:05,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:59:05,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:05,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:05,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:05,647 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[v_prenex_42]} [2021-06-12 19:59:05,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:05,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:05,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:05,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:05,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:05,668 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:05,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:05,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:05,682 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:55, output treesize:39 [2021-06-12 19:59:05,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:05,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:05,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:05,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:05,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:05,747 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:05,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:05,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:05,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 19:59:05,765 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:05,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:05,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:05,780 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:67, output treesize:21 [2021-06-12 19:59:05,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:05,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502565432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:05,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:05,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:59:05,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27266516] [2021-06-12 19:59:05,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:59:05,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:05,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:59:05,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:05,818 INFO L87 Difference]: Start difference. First operand 415 states and 1285 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:05,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:05,986 INFO L93 Difference]: Finished difference Result 541 states and 1656 transitions. [2021-06-12 19:59:05,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:05,986 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:05,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:05,987 INFO L225 Difference]: With dead ends: 541 [2021-06-12 19:59:05,987 INFO L226 Difference]: Without dead ends: 512 [2021-06-12 19:59:05,987 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 164.3ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:05,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-12 19:59:05,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 415. [2021-06-12 19:59:05,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.103864734299517) internal successors, (1285), 414 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:05,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1285 transitions. [2021-06-12 19:59:05,991 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1285 transitions. Word has length 21 [2021-06-12 19:59:05,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:05,991 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1285 transitions. [2021-06-12 19:59:05,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:05,991 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1285 transitions. [2021-06-12 19:59:05,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:05,992 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:05,992 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:06,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1085,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:06,192 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:06,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:06,192 INFO L82 PathProgramCache]: Analyzing trace with hash -790386827, now seen corresponding path program 280 times [2021-06-12 19:59:06,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:06,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954220839] [2021-06-12 19:59:06,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:06,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:06,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:06,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:06,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954220839] [2021-06-12 19:59:06,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954220839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:06,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565845503] [2021-06-12 19:59:06,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:06,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:06,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:06,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:06,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:06,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:06,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:06,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:06,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:06,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 19:59:06,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:59:06,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:06,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:06,449 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:06,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:06,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:06,469 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:06,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:06,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:06,486 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:22 [2021-06-12 19:59:06,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:06,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565845503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:06,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:06,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:06,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929085161] [2021-06-12 19:59:06,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:06,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:06,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:06,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:06,558 INFO L87 Difference]: Start difference. First operand 415 states and 1285 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:06,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:06,795 INFO L93 Difference]: Finished difference Result 560 states and 1702 transitions. [2021-06-12 19:59:06,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:59:06,795 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:06,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:06,796 INFO L225 Difference]: With dead ends: 560 [2021-06-12 19:59:06,796 INFO L226 Difference]: Without dead ends: 537 [2021-06-12 19:59:06,796 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 236.4ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:59:06,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-06-12 19:59:06,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 414. [2021-06-12 19:59:06,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 3.1138014527845037) internal successors, (1286), 413 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:06,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1286 transitions. [2021-06-12 19:59:06,800 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1286 transitions. Word has length 21 [2021-06-12 19:59:06,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:06,800 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 1286 transitions. [2021-06-12 19:59:06,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:06,800 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1286 transitions. [2021-06-12 19:59:06,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:06,801 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:06,801 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:07,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1092 [2021-06-12 19:59:07,001 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:07,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:07,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1074649511, now seen corresponding path program 281 times [2021-06-12 19:59:07,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:07,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694917542] [2021-06-12 19:59:07,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:07,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:07,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:07,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694917542] [2021-06-12 19:59:07,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694917542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:07,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119294471] [2021-06-12 19:59:07,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:07,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:07,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:07,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:07,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:07,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:07,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:07,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:07,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:07,206 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:07,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:07,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:07,225 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:48 [2021-06-12 19:59:07,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:07,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:07,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:07,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:07,278 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:07,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:07,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:07,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:07,297 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:07,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:07,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:07,313 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:73, output treesize:22 [2021-06-12 19:59:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:07,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119294471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:07,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:07,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:07,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331925997] [2021-06-12 19:59:07,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:07,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:07,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:07,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:07,389 INFO L87 Difference]: Start difference. First operand 414 states and 1286 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:07,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:07,859 INFO L93 Difference]: Finished difference Result 664 states and 1996 transitions. [2021-06-12 19:59:07,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:59:07,859 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:07,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:07,860 INFO L225 Difference]: With dead ends: 664 [2021-06-12 19:59:07,860 INFO L226 Difference]: Without dead ends: 637 [2021-06-12 19:59:07,860 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 445.7ms TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:59:07,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-06-12 19:59:07,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 425. [2021-06-12 19:59:07,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 3.1179245283018866) internal successors, (1322), 424 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:07,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1322 transitions. [2021-06-12 19:59:07,866 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1322 transitions. Word has length 21 [2021-06-12 19:59:07,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:07,866 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 1322 transitions. [2021-06-12 19:59:07,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:07,866 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1322 transitions. [2021-06-12 19:59:07,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:07,866 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:07,866 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:08,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1101 [2021-06-12 19:59:08,067 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:08,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:08,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1001040279, now seen corresponding path program 282 times [2021-06-12 19:59:08,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:08,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019926977] [2021-06-12 19:59:08,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:08,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:08,169 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:08,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:08,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019926977] [2021-06-12 19:59:08,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019926977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:08,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289376574] [2021-06-12 19:59:08,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:08,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:59:08,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:08,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:08,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:08,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:08,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:08,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:08,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:08,257 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:08,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:08,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:08,276 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:48 [2021-06-12 19:59:08,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:08,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:08,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:08,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:08,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:08,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:08,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:08,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:08,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:08,367 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:10 [2021-06-12 19:59:08,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:08,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289376574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:08,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:08,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:08,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268635868] [2021-06-12 19:59:08,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:08,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:08,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:08,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:08,412 INFO L87 Difference]: Start difference. First operand 425 states and 1322 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:08,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:08,735 INFO L93 Difference]: Finished difference Result 581 states and 1758 transitions. [2021-06-12 19:59:08,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:59:08,735 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:08,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:08,736 INFO L225 Difference]: With dead ends: 581 [2021-06-12 19:59:08,736 INFO L226 Difference]: Without dead ends: 560 [2021-06-12 19:59:08,736 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 299.9ms TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:59:08,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-12 19:59:08,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 408. [2021-06-12 19:59:08,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0933660933660936) internal successors, (1259), 407 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:08,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1259 transitions. [2021-06-12 19:59:08,740 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1259 transitions. Word has length 21 [2021-06-12 19:59:08,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:08,740 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1259 transitions. [2021-06-12 19:59:08,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:08,741 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1259 transitions. [2021-06-12 19:59:08,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:08,741 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:08,741 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:08,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1114 [2021-06-12 19:59:08,941 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:08,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:08,942 INFO L82 PathProgramCache]: Analyzing trace with hash -324653355, now seen corresponding path program 283 times [2021-06-12 19:59:08,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:08,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839857665] [2021-06-12 19:59:08,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:08,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:09,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:09,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:09,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839857665] [2021-06-12 19:59:09,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839857665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:09,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777075073] [2021-06-12 19:59:09,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:09,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:09,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:09,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:09,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:09,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:09,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:09,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:09,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:09,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:09,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:09,207 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:41 [2021-06-12 19:59:09,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:09,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:09,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:09,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:09,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:09,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 19:59:09,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:09,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:09,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:09,339 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:9 [2021-06-12 19:59:09,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:09,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777075073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:09,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:09,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:59:09,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775012273] [2021-06-12 19:59:09,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:59:09,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:09,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:59:09,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:59:09,348 INFO L87 Difference]: Start difference. First operand 408 states and 1259 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:09,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:09,510 INFO L93 Difference]: Finished difference Result 494 states and 1507 transitions. [2021-06-12 19:59:09,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:09,511 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:09,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:09,511 INFO L225 Difference]: With dead ends: 494 [2021-06-12 19:59:09,511 INFO L226 Difference]: Without dead ends: 472 [2021-06-12 19:59:09,511 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 197.8ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:59:09,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-12 19:59:09,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 418. [2021-06-12 19:59:09,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 3.105515587529976) internal successors, (1295), 417 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:09,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1295 transitions. [2021-06-12 19:59:09,516 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1295 transitions. Word has length 21 [2021-06-12 19:59:09,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:09,516 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 1295 transitions. [2021-06-12 19:59:09,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:09,516 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1295 transitions. [2021-06-12 19:59:09,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:09,516 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:09,516 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:09,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1119,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:09,717 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:09,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:09,717 INFO L82 PathProgramCache]: Analyzing trace with hash -826444691, now seen corresponding path program 284 times [2021-06-12 19:59:09,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:09,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187331519] [2021-06-12 19:59:09,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:09,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:09,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187331519] [2021-06-12 19:59:09,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187331519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:09,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659175465] [2021-06-12 19:59:09,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:09,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:09,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:09,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:09,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:09,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:09,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:09,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:09,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:09,912 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:09,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:09,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:09,931 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:41 [2021-06-12 19:59:10,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:10,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:10,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 19:59:10,014 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:10,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,022 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:15 [2021-06-12 19:59:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:10,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659175465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:10,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:10,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:59:10,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265513483] [2021-06-12 19:59:10,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:59:10,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:10,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:59:10,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:10,036 INFO L87 Difference]: Start difference. First operand 418 states and 1295 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:10,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:10,165 INFO L93 Difference]: Finished difference Result 503 states and 1531 transitions. [2021-06-12 19:59:10,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:10,165 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:10,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:10,166 INFO L225 Difference]: With dead ends: 503 [2021-06-12 19:59:10,166 INFO L226 Difference]: Without dead ends: 481 [2021-06-12 19:59:10,166 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 149.4ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:10,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-12 19:59:10,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 415. [2021-06-12 19:59:10,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.0990338164251208) internal successors, (1283), 414 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:10,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1283 transitions. [2021-06-12 19:59:10,170 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1283 transitions. Word has length 21 [2021-06-12 19:59:10,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:10,170 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1283 transitions. [2021-06-12 19:59:10,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:10,170 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1283 transitions. [2021-06-12 19:59:10,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:10,171 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:10,171 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:10,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1132 [2021-06-12 19:59:10,371 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:10,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:10,372 INFO L82 PathProgramCache]: Analyzing trace with hash 78462151, now seen corresponding path program 285 times [2021-06-12 19:59:10,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:10,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667169441] [2021-06-12 19:59:10,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:10,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:10,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:10,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667169441] [2021-06-12 19:59:10,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667169441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:10,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269556581] [2021-06-12 19:59:10,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:10,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:59:10,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:10,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:10,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:10,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:10,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:10,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:10,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:39 [2021-06-12 19:59:10,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:10,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:59:10,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:10,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:10,724 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:10,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:10,739 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:61, output treesize:5 [2021-06-12 19:59:10,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:10,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269556581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:10,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:10,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:10,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544934439] [2021-06-12 19:59:10,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:10,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:10,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:10,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:10,766 INFO L87 Difference]: Start difference. First operand 415 states and 1283 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:11,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:11,029 INFO L93 Difference]: Finished difference Result 645 states and 1933 transitions. [2021-06-12 19:59:11,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:59:11,029 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:11,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:11,030 INFO L225 Difference]: With dead ends: 645 [2021-06-12 19:59:11,030 INFO L226 Difference]: Without dead ends: 585 [2021-06-12 19:59:11,030 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 248.2ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:59:11,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-12 19:59:11,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 415. [2021-06-12 19:59:11,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.0917874396135265) internal successors, (1280), 414 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:11,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1280 transitions. [2021-06-12 19:59:11,035 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1280 transitions. Word has length 21 [2021-06-12 19:59:11,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:11,035 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1280 transitions. [2021-06-12 19:59:11,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:11,035 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1280 transitions. [2021-06-12 19:59:11,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:11,036 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:11,036 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:11,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1138 [2021-06-12 19:59:11,236 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:11,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:11,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1740027667, now seen corresponding path program 286 times [2021-06-12 19:59:11,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:11,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249882767] [2021-06-12 19:59:11,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:11,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:11,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:11,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249882767] [2021-06-12 19:59:11,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249882767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:11,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956754471] [2021-06-12 19:59:11,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:11,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:11,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:11,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:11,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:11,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:11,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:11,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:11,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:11,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:11,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:11,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:11,449 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:41 [2021-06-12 19:59:11,556 INFO L446 ElimStorePlain]: Different costs {0=[o_2, o_4], 1=[v_prenex_43, v_prenex_44]} [2021-06-12 19:59:11,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:11,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:11,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:11,572 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:11,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:11,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:11,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:11,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:11,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:11,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 19:59:11,588 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:11,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:11,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:11,600 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:51, output treesize:15 [2021-06-12 19:59:11,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:11,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956754471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:11,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:11,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:59:11,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832648792] [2021-06-12 19:59:11,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:59:11,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:11,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:59:11,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:59:11,626 INFO L87 Difference]: Start difference. First operand 415 states and 1280 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:11,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:11,810 INFO L93 Difference]: Finished difference Result 541 states and 1651 transitions. [2021-06-12 19:59:11,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:11,810 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:11,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:11,811 INFO L225 Difference]: With dead ends: 541 [2021-06-12 19:59:11,811 INFO L226 Difference]: Without dead ends: 512 [2021-06-12 19:59:11,811 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 166.7ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:59:11,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-12 19:59:11,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 415. [2021-06-12 19:59:11,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.0917874396135265) internal successors, (1280), 414 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:11,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1280 transitions. [2021-06-12 19:59:11,815 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1280 transitions. Word has length 21 [2021-06-12 19:59:11,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:11,815 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1280 transitions. [2021-06-12 19:59:11,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:11,815 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1280 transitions. [2021-06-12 19:59:11,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:11,816 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:11,816 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:12,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-06-12 19:59:12,016 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:12,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:12,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1460240711, now seen corresponding path program 287 times [2021-06-12 19:59:12,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:12,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039864265] [2021-06-12 19:59:12,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:12,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:12,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:12,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039864265] [2021-06-12 19:59:12,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039864265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:12,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22527412] [2021-06-12 19:59:12,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:12,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:12,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:12,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:12,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:12,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:12,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:12,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:12,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:12,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:34 [2021-06-12 19:59:12,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:59:12,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:12,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:12,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:12,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:12,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:12,315 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:12,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:12,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:12,330 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:61, output treesize:13 [2021-06-12 19:59:12,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:12,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22527412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:12,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:12,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:59:12,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516396422] [2021-06-12 19:59:12,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:59:12,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:12,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:59:12,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:12,348 INFO L87 Difference]: Start difference. First operand 415 states and 1280 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:12,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:12,520 INFO L93 Difference]: Finished difference Result 498 states and 1517 transitions. [2021-06-12 19:59:12,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:12,520 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:12,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:12,521 INFO L225 Difference]: With dead ends: 498 [2021-06-12 19:59:12,521 INFO L226 Difference]: Without dead ends: 471 [2021-06-12 19:59:12,521 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 161.5ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:59:12,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-12 19:59:12,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 412. [2021-06-12 19:59:12,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 3.0948905109489053) internal successors, (1272), 411 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:12,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1272 transitions. [2021-06-12 19:59:12,525 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1272 transitions. Word has length 21 [2021-06-12 19:59:12,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:12,525 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 1272 transitions. [2021-06-12 19:59:12,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:12,525 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1272 transitions. [2021-06-12 19:59:12,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:12,526 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:12,526 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:12,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1173,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:12,726 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:12,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:12,726 INFO L82 PathProgramCache]: Analyzing trace with hash 835954947, now seen corresponding path program 288 times [2021-06-12 19:59:12,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:12,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185738945] [2021-06-12 19:59:12,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:12,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:12,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185738945] [2021-06-12 19:59:12,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185738945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:12,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047994441] [2021-06-12 19:59:12,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:12,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:59:12,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:12,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:12,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:12,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:12,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:12,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:12,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:12,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:12,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:12,940 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:41 [2021-06-12 19:59:12,981 INFO L446 ElimStorePlain]: Different costs {0=[o_2, o_4], 1=[v_prenex_46, v_prenex_45]} [2021-06-12 19:59:12,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:12,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:12,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:12,999 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:13,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:13,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:13,002 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:13,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:13,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:13,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 19:59:13,017 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:13,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:13,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:13,030 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:59, output treesize:24 [2021-06-12 19:59:13,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:13,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047994441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:13,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:13,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:59:13,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663926345] [2021-06-12 19:59:13,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:59:13,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:13,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:59:13,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:13,064 INFO L87 Difference]: Start difference. First operand 412 states and 1272 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:13,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:13,240 INFO L93 Difference]: Finished difference Result 544 states and 1659 transitions. [2021-06-12 19:59:13,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:13,240 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:13,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:13,241 INFO L225 Difference]: With dead ends: 544 [2021-06-12 19:59:13,241 INFO L226 Difference]: Without dead ends: 515 [2021-06-12 19:59:13,241 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 150.4ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:13,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-06-12 19:59:13,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 413. [2021-06-12 19:59:13,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1019417475728157) internal successors, (1278), 412 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:13,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1278 transitions. [2021-06-12 19:59:13,245 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1278 transitions. Word has length 21 [2021-06-12 19:59:13,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:13,245 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1278 transitions. [2021-06-12 19:59:13,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:13,246 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1278 transitions. [2021-06-12 19:59:13,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:13,246 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:13,246 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:13,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1186,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:13,446 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:13,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:13,447 INFO L82 PathProgramCache]: Analyzing trace with hash 848958673, now seen corresponding path program 289 times [2021-06-12 19:59:13,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:13,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866280382] [2021-06-12 19:59:13,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:13,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:13,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:13,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866280382] [2021-06-12 19:59:13,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866280382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:13,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138937341] [2021-06-12 19:59:13,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:13,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:13,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:13,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:13,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:13,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:13,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:13,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:13,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:34 [2021-06-12 19:59:13,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:13,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:13,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:13,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:13,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:59:13,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:13,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:13,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:13,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:13,712 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:13,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:13,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:13,730 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:71, output treesize:19 [2021-06-12 19:59:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:13,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138937341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:13,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:13,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:13,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617752027] [2021-06-12 19:59:13,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:13,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:13,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:13,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:13,805 INFO L87 Difference]: Start difference. First operand 413 states and 1278 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:14,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:14,104 INFO L93 Difference]: Finished difference Result 565 states and 1709 transitions. [2021-06-12 19:59:14,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:59:14,105 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:14,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:14,105 INFO L225 Difference]: With dead ends: 565 [2021-06-12 19:59:14,105 INFO L226 Difference]: Without dead ends: 538 [2021-06-12 19:59:14,105 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 306.5ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:59:14,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-12 19:59:14,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 411. [2021-06-12 19:59:14,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.0902439024390245) internal successors, (1267), 410 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:14,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1267 transitions. [2021-06-12 19:59:14,110 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1267 transitions. Word has length 21 [2021-06-12 19:59:14,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:14,110 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 1267 transitions. [2021-06-12 19:59:14,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:14,110 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1267 transitions. [2021-06-12 19:59:14,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:14,110 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:14,110 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:14,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1194 [2021-06-12 19:59:14,311 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:14,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:14,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1990525963, now seen corresponding path program 290 times [2021-06-12 19:59:14,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:14,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916988963] [2021-06-12 19:59:14,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:14,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:14,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:14,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:14,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916988963] [2021-06-12 19:59:14,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916988963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:14,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044653704] [2021-06-12 19:59:14,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:14,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:14,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:14,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:14,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:14,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:14,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:14,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:14,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:14,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:14,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2021-06-12 19:59:14,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:14,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:14,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:14,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:14,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:14,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:14,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:14,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:14,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:14,587 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:10 [2021-06-12 19:59:14,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:14,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044653704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:14,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:14,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:59:14,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363597134] [2021-06-12 19:59:14,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:59:14,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:14,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:59:14,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:14,599 INFO L87 Difference]: Start difference. First operand 411 states and 1267 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:14,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:14,772 INFO L93 Difference]: Finished difference Result 483 states and 1473 transitions. [2021-06-12 19:59:14,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:14,772 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:14,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:14,772 INFO L225 Difference]: With dead ends: 483 [2021-06-12 19:59:14,773 INFO L226 Difference]: Without dead ends: 464 [2021-06-12 19:59:14,773 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 163.0ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:14,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-06-12 19:59:14,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 407. [2021-06-12 19:59:14,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.0911330049261085) internal successors, (1255), 406 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:14,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1255 transitions. [2021-06-12 19:59:14,777 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1255 transitions. Word has length 21 [2021-06-12 19:59:14,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:14,777 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 1255 transitions. [2021-06-12 19:59:14,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:14,777 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1255 transitions. [2021-06-12 19:59:14,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:14,777 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:14,777 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:14,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1204,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:14,978 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:14,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:14,978 INFO L82 PathProgramCache]: Analyzing trace with hash 246230357, now seen corresponding path program 291 times [2021-06-12 19:59:14,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:14,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399086112] [2021-06-12 19:59:14,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:15,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:15,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:15,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399086112] [2021-06-12 19:59:15,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399086112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:15,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440055790] [2021-06-12 19:59:15,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:15,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:59:15,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:15,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:15,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:15,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:15,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:15,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:15,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:28 [2021-06-12 19:59:15,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 19:59:15,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 19:59:15,238 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:15,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 19:59:15,254 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:15,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:15,269 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:15 [2021-06-12 19:59:15,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:15,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440055790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:15,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:15,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:59:15,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418702865] [2021-06-12 19:59:15,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:59:15,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:15,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:59:15,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:15,287 INFO L87 Difference]: Start difference. First operand 407 states and 1255 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:15,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:15,466 INFO L93 Difference]: Finished difference Result 504 states and 1535 transitions. [2021-06-12 19:59:15,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:15,466 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:15,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:15,467 INFO L225 Difference]: With dead ends: 504 [2021-06-12 19:59:15,467 INFO L226 Difference]: Without dead ends: 468 [2021-06-12 19:59:15,467 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 148.9ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:15,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-06-12 19:59:15,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 407. [2021-06-12 19:59:15,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.0911330049261085) internal successors, (1255), 406 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:15,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1255 transitions. [2021-06-12 19:59:15,471 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1255 transitions. Word has length 21 [2021-06-12 19:59:15,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:15,471 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 1255 transitions. [2021-06-12 19:59:15,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:15,471 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1255 transitions. [2021-06-12 19:59:15,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:15,472 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:15,472 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:15,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1207 [2021-06-12 19:59:15,672 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:15,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:15,672 INFO L82 PathProgramCache]: Analyzing trace with hash -848468561, now seen corresponding path program 292 times [2021-06-12 19:59:15,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:15,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640442814] [2021-06-12 19:59:15,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:15,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:15,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:15,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:15,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640442814] [2021-06-12 19:59:15,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640442814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:15,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885125939] [2021-06-12 19:59:15,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:15,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:15,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:15,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:15,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:15,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:15,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:15,894 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:15,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:15,907 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:28 [2021-06-12 19:59:15,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:15,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:15,948 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:15,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:15,963 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:15,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:15,975 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:13 [2021-06-12 19:59:16,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:16,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885125939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:16,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:16,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:59:16,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914020726] [2021-06-12 19:59:16,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:59:16,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:16,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:59:16,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:59:16,005 INFO L87 Difference]: Start difference. First operand 407 states and 1255 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:16,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:16,146 INFO L93 Difference]: Finished difference Result 545 states and 1654 transitions. [2021-06-12 19:59:16,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:16,147 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:16,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:16,147 INFO L225 Difference]: With dead ends: 545 [2021-06-12 19:59:16,147 INFO L226 Difference]: Without dead ends: 518 [2021-06-12 19:59:16,148 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 186.5ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:16,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-12 19:59:16,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 422. [2021-06-12 19:59:16,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.0902612826603324) internal successors, (1301), 421 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:16,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1301 transitions. [2021-06-12 19:59:16,152 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1301 transitions. Word has length 21 [2021-06-12 19:59:16,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:16,152 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 1301 transitions. [2021-06-12 19:59:16,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:16,152 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1301 transitions. [2021-06-12 19:59:16,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:16,153 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:16,153 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:16,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1217,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:16,353 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:16,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:16,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1032284377, now seen corresponding path program 293 times [2021-06-12 19:59:16,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:16,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143414458] [2021-06-12 19:59:16,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:16,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:16,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:16,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143414458] [2021-06-12 19:59:16,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143414458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:16,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673407928] [2021-06-12 19:59:16,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:16,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:59:16,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:16,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:59:16,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:16,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:16,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:16,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:16,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:16,599 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:16,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:16,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:16,617 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:28 [2021-06-12 19:59:16,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:16,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:16,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:16,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:16,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:16,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:16,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:16,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:16,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:16,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:16,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:16,724 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:16,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:16,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:16,727 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:16,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:16,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:16,760 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:77, output treesize:25 [2021-06-12 19:59:16,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:16,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673407928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:16,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:16,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:16,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840027483] [2021-06-12 19:59:16,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:16,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:16,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:16,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:16,822 INFO L87 Difference]: Start difference. First operand 422 states and 1301 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:17,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:17,090 INFO L93 Difference]: Finished difference Result 495 states and 1501 transitions. [2021-06-12 19:59:17,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:17,090 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:17,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:17,091 INFO L225 Difference]: With dead ends: 495 [2021-06-12 19:59:17,091 INFO L226 Difference]: Without dead ends: 474 [2021-06-12 19:59:17,091 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 251.6ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:17,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-06-12 19:59:17,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 404. [2021-06-12 19:59:17,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.094292803970223) internal successors, (1247), 403 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:17,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1247 transitions. [2021-06-12 19:59:17,095 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1247 transitions. Word has length 21 [2021-06-12 19:59:17,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:17,095 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1247 transitions. [2021-06-12 19:59:17,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:17,096 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1247 transitions. [2021-06-12 19:59:17,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:17,096 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:17,096 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:17,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1231 [2021-06-12 19:59:17,296 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:17,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:17,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1684577419, now seen corresponding path program 294 times [2021-06-12 19:59:17,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:17,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071958385] [2021-06-12 19:59:17,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:17,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:17,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:17,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071958385] [2021-06-12 19:59:17,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071958385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:17,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218221560] [2021-06-12 19:59:17,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:17,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:59:17,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:17,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:17,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:17,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:17,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:17,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:17,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:17,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:17,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:33 [2021-06-12 19:59:17,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 19:59:17,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:17,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:17,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 19:59:17,522 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:17,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:17,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:17,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 19:59:17,542 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:17,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:17,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:17,560 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:67, output treesize:24 [2021-06-12 19:59:17,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:17,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218221560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:17,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:17,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:59:17,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635598977] [2021-06-12 19:59:17,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:59:17,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:17,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:59:17,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:17,595 INFO L87 Difference]: Start difference. First operand 404 states and 1247 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:17,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:17,726 INFO L93 Difference]: Finished difference Result 519 states and 1575 transitions. [2021-06-12 19:59:17,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:17,726 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:17,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:17,727 INFO L225 Difference]: With dead ends: 519 [2021-06-12 19:59:17,727 INFO L226 Difference]: Without dead ends: 483 [2021-06-12 19:59:17,727 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 130.9ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:17,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-06-12 19:59:17,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 405. [2021-06-12 19:59:17,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.099009900990099) internal successors, (1252), 404 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:17,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1252 transitions. [2021-06-12 19:59:17,731 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1252 transitions. Word has length 21 [2021-06-12 19:59:17,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:17,731 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1252 transitions. [2021-06-12 19:59:17,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:17,731 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1252 transitions. [2021-06-12 19:59:17,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:17,732 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:17,732 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:17,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1241,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:17,932 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:17,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:17,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1981843829, now seen corresponding path program 295 times [2021-06-12 19:59:17,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:17,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106305500] [2021-06-12 19:59:17,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:18,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:18,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:18,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106305500] [2021-06-12 19:59:18,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106305500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:18,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134980780] [2021-06-12 19:59:18,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:18,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:18,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:18,115 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_47], 1=[o_2]} [2021-06-12 19:59:18,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:18,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:18,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:18,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:18,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:18,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:18,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:18,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:18,148 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:50, output treesize:34 [2021-06-12 19:59:18,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:18,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:18,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:18,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:18,193 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:18,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:18,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:18,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:18,212 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:18,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:18,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:18,227 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:62, output treesize:19 [2021-06-12 19:59:18,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:18,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134980780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:18,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:18,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:59:18,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317362024] [2021-06-12 19:59:18,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:59:18,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:18,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:59:18,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:59:18,251 INFO L87 Difference]: Start difference. First operand 405 states and 1252 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:18,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:18,386 INFO L93 Difference]: Finished difference Result 604 states and 1827 transitions. [2021-06-12 19:59:18,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:18,387 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:18,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:18,388 INFO L225 Difference]: With dead ends: 604 [2021-06-12 19:59:18,388 INFO L226 Difference]: Without dead ends: 581 [2021-06-12 19:59:18,388 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 153.1ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:18,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-06-12 19:59:18,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 420. [2021-06-12 19:59:18,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 3.119331742243437) internal successors, (1307), 419 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:18,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1307 transitions. [2021-06-12 19:59:18,392 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1307 transitions. Word has length 21 [2021-06-12 19:59:18,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:18,392 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 1307 transitions. [2021-06-12 19:59:18,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:18,393 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1307 transitions. [2021-06-12 19:59:18,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:18,393 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:18,393 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:18,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1247 [2021-06-12 19:59:18,593 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:18,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:18,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1697581145, now seen corresponding path program 296 times [2021-06-12 19:59:18,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:18,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664671322] [2021-06-12 19:59:18,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:18,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:18,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664671322] [2021-06-12 19:59:18,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664671322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:18,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835649864] [2021-06-12 19:59:18,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:18,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:18,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:18,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:18,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:18,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:18,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:18,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:18,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:18,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:18,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:18,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:18,820 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:38 [2021-06-12 19:59:18,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:18,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:18,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:18,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:18,869 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:18,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:18,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:18,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:18,887 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:18,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:18,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:18,902 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:66, output treesize:19 [2021-06-12 19:59:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:18,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835649864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:18,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:18,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:18,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804544617] [2021-06-12 19:59:18,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:18,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:18,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:18,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:18,984 INFO L87 Difference]: Start difference. First operand 420 states and 1307 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:19,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:19,274 INFO L93 Difference]: Finished difference Result 637 states and 1918 transitions. [2021-06-12 19:59:19,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:59:19,274 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:19,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:19,275 INFO L225 Difference]: With dead ends: 637 [2021-06-12 19:59:19,275 INFO L226 Difference]: Without dead ends: 610 [2021-06-12 19:59:19,275 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 312.4ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:59:19,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-06-12 19:59:19,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 438. [2021-06-12 19:59:19,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.128146453089245) internal successors, (1367), 437 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:19,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1367 transitions. [2021-06-12 19:59:19,280 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1367 transitions. Word has length 21 [2021-06-12 19:59:19,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:19,280 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1367 transitions. [2021-06-12 19:59:19,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:19,283 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1367 transitions. [2021-06-12 19:59:19,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:19,284 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:19,284 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:19,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1255 [2021-06-12 19:59:19,484 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:19,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:19,485 INFO L82 PathProgramCache]: Analyzing trace with hash -263165821, now seen corresponding path program 297 times [2021-06-12 19:59:19,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:19,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524454630] [2021-06-12 19:59:19,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:19,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:19,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524454630] [2021-06-12 19:59:19,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524454630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:19,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462836969] [2021-06-12 19:59:19,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:19,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:59:19,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:19,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:19,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:19,688 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[v_prenex_48]} [2021-06-12 19:59:19,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:19,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:19,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:19,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:19,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:19,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:19,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:19,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:19,720 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:50, output treesize:34 [2021-06-12 19:59:19,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:19,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:19,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:19,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:19,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:19,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:19,783 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:19,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:19,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:19,790 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:10 [2021-06-12 19:59:19,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:19,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462836969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:19,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:19,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:19,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133159676] [2021-06-12 19:59:19,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:19,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:19,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:19,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:19,836 INFO L87 Difference]: Start difference. First operand 438 states and 1367 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:20,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:20,114 INFO L93 Difference]: Finished difference Result 609 states and 1851 transitions. [2021-06-12 19:59:20,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:59:20,114 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:20,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:20,115 INFO L225 Difference]: With dead ends: 609 [2021-06-12 19:59:20,115 INFO L226 Difference]: Without dead ends: 590 [2021-06-12 19:59:20,115 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 236.4ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:20,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-06-12 19:59:20,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 424. [2021-06-12 19:59:20,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.115839243498818) internal successors, (1318), 423 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:20,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1318 transitions. [2021-06-12 19:59:20,120 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1318 transitions. Word has length 21 [2021-06-12 19:59:20,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:20,120 INFO L482 AbstractCegarLoop]: Abstraction has 424 states and 1318 transitions. [2021-06-12 19:59:20,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:20,120 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1318 transitions. [2021-06-12 19:59:20,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:20,120 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:20,120 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:20,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1267 [2021-06-12 19:59:20,321 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:20,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:20,321 INFO L82 PathProgramCache]: Analyzing trace with hash 282206833, now seen corresponding path program 298 times [2021-06-12 19:59:20,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:20,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114286388] [2021-06-12 19:59:20,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:20,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:20,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114286388] [2021-06-12 19:59:20,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114286388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:20,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662192182] [2021-06-12 19:59:20,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:20,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:20,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:20,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:20,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:20,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:20,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:20,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:20,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:20,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:20,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:20,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:20,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:20,523 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:38 [2021-06-12 19:59:20,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:20,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:20,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:20,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:20,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:20,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:20,641 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:20,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:20,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:20,647 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:33, output treesize:7 [2021-06-12 19:59:20,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:20,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662192182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:20,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:20,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:59:20,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322158475] [2021-06-12 19:59:20,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:59:20,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:20,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:59:20,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:59:20,658 INFO L87 Difference]: Start difference. First operand 424 states and 1318 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:20,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:20,834 INFO L93 Difference]: Finished difference Result 526 states and 1590 transitions. [2021-06-12 19:59:20,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:20,834 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:20,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:20,835 INFO L225 Difference]: With dead ends: 526 [2021-06-12 19:59:20,835 INFO L226 Difference]: Without dead ends: 505 [2021-06-12 19:59:20,835 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 197.2ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:20,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-12 19:59:20,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 420. [2021-06-12 19:59:20,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 3.116945107398568) internal successors, (1306), 419 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:20,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1306 transitions. [2021-06-12 19:59:20,839 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1306 transitions. Word has length 21 [2021-06-12 19:59:20,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:20,839 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 1306 transitions. [2021-06-12 19:59:20,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:20,839 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1306 transitions. [2021-06-12 19:59:20,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:20,840 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:20,840 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:21,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1272,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:21,041 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:21,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:21,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1436777849, now seen corresponding path program 299 times [2021-06-12 19:59:21,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:21,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317112811] [2021-06-12 19:59:21,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:21,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:21,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317112811] [2021-06-12 19:59:21,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317112811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:21,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097873099] [2021-06-12 19:59:21,173 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:21,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:59:21,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:21,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:59:21,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:21,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:21,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:21,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:21,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:21,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:21,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:21,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:21,304 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:38 [2021-06-12 19:59:21,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:21,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:21,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:21,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:21,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:21,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:21,371 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:21,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:21,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:21,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:21,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:21,401 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:21,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:21,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:21,404 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:21,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:21,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:21,429 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:87, output treesize:31 [2021-06-12 19:59:21,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:21,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097873099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:21,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:21,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:21,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4044440] [2021-06-12 19:59:21,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:21,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:21,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:21,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:21,506 INFO L87 Difference]: Start difference. First operand 420 states and 1306 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:21,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:21,796 INFO L93 Difference]: Finished difference Result 559 states and 1704 transitions. [2021-06-12 19:59:21,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:59:21,796 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:21,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:21,797 INFO L225 Difference]: With dead ends: 559 [2021-06-12 19:59:21,797 INFO L226 Difference]: Without dead ends: 538 [2021-06-12 19:59:21,797 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 324.5ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:59:21,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-12 19:59:21,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 403. [2021-06-12 19:59:21,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.0920398009950247) internal successors, (1243), 402 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:21,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1243 transitions. [2021-06-12 19:59:21,801 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1243 transitions. Word has length 21 [2021-06-12 19:59:21,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:21,801 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1243 transitions. [2021-06-12 19:59:21,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:21,801 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1243 transitions. [2021-06-12 19:59:21,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:21,802 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:21,802 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:22,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1287 [2021-06-12 19:59:22,002 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:22,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:22,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1694849269, now seen corresponding path program 300 times [2021-06-12 19:59:22,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:22,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586800295] [2021-06-12 19:59:22,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:22,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:22,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:22,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586800295] [2021-06-12 19:59:22,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586800295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:22,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436692224] [2021-06-12 19:59:22,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:22,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:59:22,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:22,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:22,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:22,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:22,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:22,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:22,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:22,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:22,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:22,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:22,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:22,196 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 19:59:22,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:22,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:22,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:22,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:22,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:22,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 19:59:22,269 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:22,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:22,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:22,278 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:12 [2021-06-12 19:59:22,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:22,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436692224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:22,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:22,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:59:22,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542939014] [2021-06-12 19:59:22,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:59:22,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:22,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:59:22,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:22,292 INFO L87 Difference]: Start difference. First operand 403 states and 1243 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:22,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:22,451 INFO L93 Difference]: Finished difference Result 483 states and 1474 transitions. [2021-06-12 19:59:22,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:22,452 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:22,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:22,452 INFO L225 Difference]: With dead ends: 483 [2021-06-12 19:59:22,452 INFO L226 Difference]: Without dead ends: 461 [2021-06-12 19:59:22,452 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 140.2ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:22,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-06-12 19:59:22,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 409. [2021-06-12 19:59:22,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 3.0980392156862746) internal successors, (1264), 408 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:22,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1264 transitions. [2021-06-12 19:59:22,456 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1264 transitions. Word has length 21 [2021-06-12 19:59:22,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:22,457 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1264 transitions. [2021-06-12 19:59:22,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:22,457 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1264 transitions. [2021-06-12 19:59:22,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:22,457 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:22,457 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:22,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1294,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:22,658 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:22,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:22,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1974793909, now seen corresponding path program 301 times [2021-06-12 19:59:22,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:22,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506183849] [2021-06-12 19:59:22,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:22,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:22,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:22,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:22,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506183849] [2021-06-12 19:59:22,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506183849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:22,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167665597] [2021-06-12 19:59:22,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:22,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:22,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:22,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:22,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:22,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:22,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:22,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:22,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:22,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 19:59:22,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:59:22,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:22,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:22,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:22,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:22,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:22,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:22,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:22,954 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:22,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:22,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:22,972 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:13 [2021-06-12 19:59:23,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:23,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167665597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:23,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:23,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:23,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443895340] [2021-06-12 19:59:23,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:23,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:23,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:23,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:23,029 INFO L87 Difference]: Start difference. First operand 409 states and 1264 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:23,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:23,282 INFO L93 Difference]: Finished difference Result 553 states and 1681 transitions. [2021-06-12 19:59:23,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:59:23,283 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:23,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:23,284 INFO L225 Difference]: With dead ends: 553 [2021-06-12 19:59:23,284 INFO L226 Difference]: Without dead ends: 526 [2021-06-12 19:59:23,284 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 203.2ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:23,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-12 19:59:23,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 409. [2021-06-12 19:59:23,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 3.093137254901961) internal successors, (1262), 408 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:23,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1262 transitions. [2021-06-12 19:59:23,289 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1262 transitions. Word has length 21 [2021-06-12 19:59:23,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:23,289 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1262 transitions. [2021-06-12 19:59:23,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:23,289 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1262 transitions. [2021-06-12 19:59:23,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:23,289 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:23,289 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:23,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1301 [2021-06-12 19:59:23,490 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:23,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:23,490 INFO L82 PathProgramCache]: Analyzing trace with hash 2035910703, now seen corresponding path program 302 times [2021-06-12 19:59:23,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:23,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241435170] [2021-06-12 19:59:23,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:23,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:23,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241435170] [2021-06-12 19:59:23,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241435170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:23,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821724283] [2021-06-12 19:59:23,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:23,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:23,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:23,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:23,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:23,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:23,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:23,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:23,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:23,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:23,666 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:23,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:23,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:23,685 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 19:59:23,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:23,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:23,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:23,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:23,783 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:23,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:23,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:23,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:23,799 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:23,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:23,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:23,814 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:13 [2021-06-12 19:59:23,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:23,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821724283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:23,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:23,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:23,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680495274] [2021-06-12 19:59:23,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:23,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:23,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:23,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:23,863 INFO L87 Difference]: Start difference. First operand 409 states and 1262 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:24,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:24,196 INFO L93 Difference]: Finished difference Result 643 states and 1940 transitions. [2021-06-12 19:59:24,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:59:24,196 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:24,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:24,197 INFO L225 Difference]: With dead ends: 643 [2021-06-12 19:59:24,197 INFO L226 Difference]: Without dead ends: 616 [2021-06-12 19:59:24,197 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 296.5ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:59:24,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-06-12 19:59:24,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 423. [2021-06-12 19:59:24,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 3.0924170616113744) internal successors, (1305), 422 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:24,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1305 transitions. [2021-06-12 19:59:24,202 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1305 transitions. Word has length 21 [2021-06-12 19:59:24,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:24,202 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 1305 transitions. [2021-06-12 19:59:24,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:24,202 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1305 transitions. [2021-06-12 19:59:24,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:24,202 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:24,202 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:24,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1311 [2021-06-12 19:59:24,403 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:24,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:24,403 INFO L82 PathProgramCache]: Analyzing trace with hash -572664753, now seen corresponding path program 303 times [2021-06-12 19:59:24,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:24,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124147823] [2021-06-12 19:59:24,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:24,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:24,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:24,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124147823] [2021-06-12 19:59:24,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124147823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:24,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480050040] [2021-06-12 19:59:24,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:24,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:59:24,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:24,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:24,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:24,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:24,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:24,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:24,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:24,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:24,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:24,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:24,599 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 19:59:24,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:24,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:24,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:24,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:24,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:24,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:24,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:24,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:24,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:24,721 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:7 [2021-06-12 19:59:24,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:24,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480050040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:24,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:24,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:24,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187935041] [2021-06-12 19:59:24,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:24,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:24,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:24,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:24,767 INFO L87 Difference]: Start difference. First operand 423 states and 1305 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:25,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:25,121 INFO L93 Difference]: Finished difference Result 577 states and 1741 transitions. [2021-06-12 19:59:25,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:59:25,121 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:25,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:25,122 INFO L225 Difference]: With dead ends: 577 [2021-06-12 19:59:25,122 INFO L226 Difference]: Without dead ends: 556 [2021-06-12 19:59:25,122 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 307.0ms TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:59:25,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-12 19:59:25,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 424. [2021-06-12 19:59:25,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.1016548463356974) internal successors, (1312), 423 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:25,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1312 transitions. [2021-06-12 19:59:25,126 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1312 transitions. Word has length 21 [2021-06-12 19:59:25,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:25,126 INFO L482 AbstractCegarLoop]: Abstraction has 424 states and 1312 transitions. [2021-06-12 19:59:25,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:25,126 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1312 transitions. [2021-06-12 19:59:25,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:25,127 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:25,127 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:25,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1328 [2021-06-12 19:59:25,328 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:25,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:25,328 INFO L82 PathProgramCache]: Analyzing trace with hash -550160381, now seen corresponding path program 304 times [2021-06-12 19:59:25,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:25,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601959598] [2021-06-12 19:59:25,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:25,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:25,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:25,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601959598] [2021-06-12 19:59:25,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601959598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:25,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679509334] [2021-06-12 19:59:25,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:25,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:25,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:25,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:25,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:25,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:25,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:25,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:25,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:25,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:25,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:25,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:25,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:25,522 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 19:59:25,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:25,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:25,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:25,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:25,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:25,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:25,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:25,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 19:59:25,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:25,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:25,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:25,604 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:65, output treesize:21 [2021-06-12 19:59:25,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:25,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679509334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:25,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:25,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:59:25,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551514088] [2021-06-12 19:59:25,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:59:25,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:25,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:59:25,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:25,638 INFO L87 Difference]: Start difference. First operand 424 states and 1312 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:25,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:25,820 INFO L93 Difference]: Finished difference Result 545 states and 1669 transitions. [2021-06-12 19:59:25,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:25,820 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:25,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:25,821 INFO L225 Difference]: With dead ends: 545 [2021-06-12 19:59:25,821 INFO L226 Difference]: Without dead ends: 516 [2021-06-12 19:59:25,821 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 138.4ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:25,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-06-12 19:59:25,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 424. [2021-06-12 19:59:25,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.1016548463356974) internal successors, (1312), 423 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:25,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1312 transitions. [2021-06-12 19:59:25,825 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1312 transitions. Word has length 21 [2021-06-12 19:59:25,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:25,825 INFO L482 AbstractCegarLoop]: Abstraction has 424 states and 1312 transitions. [2021-06-12 19:59:25,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:25,825 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1312 transitions. [2021-06-12 19:59:25,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:25,826 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:25,826 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:26,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1340,305 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:26,026 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:26,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:26,026 INFO L82 PathProgramCache]: Analyzing trace with hash -252893971, now seen corresponding path program 305 times [2021-06-12 19:59:26,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:26,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631719210] [2021-06-12 19:59:26,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:26,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:26,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631719210] [2021-06-12 19:59:26,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631719210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:26,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9811105] [2021-06-12 19:59:26,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:26,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:59:26,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:26,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:59:26,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:26,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:26,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:26,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:26,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:26,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:26,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:26,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:26,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:26,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:26,247 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-06-12 19:59:26,346 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-12 19:59:26,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:59:26,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:26,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:59:26,354 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:26,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:26,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:26,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:26,358 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:26,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:26,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:26,361 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:26,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:26,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:26,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:26,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:26,411 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:26,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:26,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:26,414 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:26,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:26,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:26,461 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:153, output treesize:57 [2021-06-12 19:59:26,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:26,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9811105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:26,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:26,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:26,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587850338] [2021-06-12 19:59:26,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:26,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:26,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:26,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:26,574 INFO L87 Difference]: Start difference. First operand 424 states and 1312 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:27,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:27,109 INFO L93 Difference]: Finished difference Result 613 states and 1863 transitions. [2021-06-12 19:59:27,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:59:27,109 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:27,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:27,110 INFO L225 Difference]: With dead ends: 613 [2021-06-12 19:59:27,110 INFO L226 Difference]: Without dead ends: 571 [2021-06-12 19:59:27,110 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 480.1ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:59:27,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-12 19:59:27,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 423. [2021-06-12 19:59:27,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 3.1113744075829386) internal successors, (1313), 422 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:27,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1313 transitions. [2021-06-12 19:59:27,115 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1313 transitions. Word has length 21 [2021-06-12 19:59:27,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:27,115 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 1313 transitions. [2021-06-12 19:59:27,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:27,115 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1313 transitions. [2021-06-12 19:59:27,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:27,115 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:27,115 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:27,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1349,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:27,316 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:27,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:27,316 INFO L82 PathProgramCache]: Analyzing trace with hash -537156655, now seen corresponding path program 306 times [2021-06-12 19:59:27,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:27,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453121350] [2021-06-12 19:59:27,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:27,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:27,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:27,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453121350] [2021-06-12 19:59:27,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453121350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:27,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928010902] [2021-06-12 19:59:27,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:27,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:59:27,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:27,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:27,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:27,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:27,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:27,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:27,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:27,497 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:27,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:27,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:27,515 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 19:59:27,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:27,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:27,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:27,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:27,564 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:27,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:27,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:27,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:27,583 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:27,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:27,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:27,599 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:67, output treesize:19 [2021-06-12 19:59:27,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:27,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928010902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:27,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:27,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:27,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001273625] [2021-06-12 19:59:27,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:27,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:27,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:27,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:27,673 INFO L87 Difference]: Start difference. First operand 423 states and 1313 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:28,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:28,001 INFO L93 Difference]: Finished difference Result 667 states and 2002 transitions. [2021-06-12 19:59:28,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:59:28,001 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:28,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:28,002 INFO L225 Difference]: With dead ends: 667 [2021-06-12 19:59:28,002 INFO L226 Difference]: Without dead ends: 640 [2021-06-12 19:59:28,002 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 303.9ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:59:28,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-12 19:59:28,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 426. [2021-06-12 19:59:28,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.1223529411764708) internal successors, (1327), 425 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:28,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1327 transitions. [2021-06-12 19:59:28,007 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1327 transitions. Word has length 21 [2021-06-12 19:59:28,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:28,007 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1327 transitions. [2021-06-12 19:59:28,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:28,007 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1327 transitions. [2021-06-12 19:59:28,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:28,008 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:28,008 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:28,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1361,307 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:28,208 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:28,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:28,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1538533135, now seen corresponding path program 307 times [2021-06-12 19:59:28,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:28,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409850615] [2021-06-12 19:59:28,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:28,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:28,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:28,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:28,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409850615] [2021-06-12 19:59:28,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409850615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:28,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100988232] [2021-06-12 19:59:28,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:28,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:28,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:28,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:28,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:28,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:28,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:28,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:28,371 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:28,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:28,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:28,389 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 19:59:28,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:28,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:28,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:28,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:28,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:28,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:28,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:28,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:28,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:28,469 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:10 [2021-06-12 19:59:28,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:28,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100988232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:28,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:28,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:59:28,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589546196] [2021-06-12 19:59:28,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:59:28,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:28,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:59:28,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:28,484 INFO L87 Difference]: Start difference. First operand 426 states and 1327 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:28,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:28,637 INFO L93 Difference]: Finished difference Result 522 states and 1590 transitions. [2021-06-12 19:59:28,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:28,638 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:28,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:28,638 INFO L225 Difference]: With dead ends: 522 [2021-06-12 19:59:28,638 INFO L226 Difference]: Without dead ends: 501 [2021-06-12 19:59:28,638 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:28,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-12 19:59:28,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 422. [2021-06-12 19:59:28,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.111638954869359) internal successors, (1310), 421 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:28,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1310 transitions. [2021-06-12 19:59:28,643 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1310 transitions. Word has length 21 [2021-06-12 19:59:28,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:28,643 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 1310 transitions. [2021-06-12 19:59:28,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:28,643 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1310 transitions. [2021-06-12 19:59:28,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:28,643 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:28,644 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:28,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1373,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:28,844 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:28,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:28,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1147084563, now seen corresponding path program 308 times [2021-06-12 19:59:28,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:28,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190164633] [2021-06-12 19:59:28,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:28,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:28,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190164633] [2021-06-12 19:59:28,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190164633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:28,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289421470] [2021-06-12 19:59:28,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:28,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:28,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:28,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:28,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:28,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:28,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:28,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:29,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:29,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:29,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:31 [2021-06-12 19:59:29,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:29,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:29,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 19:59:29,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:29,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 19:59:29,053 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:29,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:29,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:29,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 19:59:29,072 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:29,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:29,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:29,089 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:65, output treesize:21 [2021-06-12 19:59:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:29,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289421470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:29,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:29,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:59:29,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286964353] [2021-06-12 19:59:29,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:59:29,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:29,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:59:29,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:29,123 INFO L87 Difference]: Start difference. First operand 422 states and 1310 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:29,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:29,282 INFO L93 Difference]: Finished difference Result 519 states and 1590 transitions. [2021-06-12 19:59:29,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:29,282 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:29,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:29,283 INFO L225 Difference]: With dead ends: 519 [2021-06-12 19:59:29,283 INFO L226 Difference]: Without dead ends: 483 [2021-06-12 19:59:29,283 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:29,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-06-12 19:59:29,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 423. [2021-06-12 19:59:29,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 3.1161137440758293) internal successors, (1315), 422 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:29,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1315 transitions. [2021-06-12 19:59:29,287 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1315 transitions. Word has length 21 [2021-06-12 19:59:29,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:29,288 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 1315 transitions. [2021-06-12 19:59:29,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:29,288 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1315 transitions. [2021-06-12 19:59:29,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:29,288 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:29,288 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:29,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1377 [2021-06-12 19:59:29,489 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:29,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:29,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1444350973, now seen corresponding path program 309 times [2021-06-12 19:59:29,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:29,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591664520] [2021-06-12 19:59:29,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:29,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:29,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:29,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591664520] [2021-06-12 19:59:29,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591664520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:29,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385596081] [2021-06-12 19:59:29,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:29,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:59:29,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:29,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:29,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:29,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:29,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:29,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:29,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:29,673 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:29,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:29,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:29,687 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 19:59:29,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:29,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:29,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:29,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:29,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:29,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:29,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:29,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:29,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:29,752 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:29,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:29,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:29,769 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:65, output treesize:19 [2021-06-12 19:59:29,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:29,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385596081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:29,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:29,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:29,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350738763] [2021-06-12 19:59:29,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:29,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:29,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:29,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:29,839 INFO L87 Difference]: Start difference. First operand 423 states and 1315 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:30,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:30,109 INFO L93 Difference]: Finished difference Result 614 states and 1865 transitions. [2021-06-12 19:59:30,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:59:30,109 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:30,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:30,110 INFO L225 Difference]: With dead ends: 614 [2021-06-12 19:59:30,110 INFO L226 Difference]: Without dead ends: 591 [2021-06-12 19:59:30,110 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 242.7ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:59:30,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-12 19:59:30,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 438. [2021-06-12 19:59:30,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.135011441647597) internal successors, (1370), 437 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:30,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1370 transitions. [2021-06-12 19:59:30,115 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1370 transitions. Word has length 21 [2021-06-12 19:59:30,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:30,115 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1370 transitions. [2021-06-12 19:59:30,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:30,115 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1370 transitions. [2021-06-12 19:59:30,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:30,115 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:30,116 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:30,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1383,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:30,316 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:30,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:30,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1160088289, now seen corresponding path program 310 times [2021-06-12 19:59:30,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:30,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094311350] [2021-06-12 19:59:30,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:30,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:30,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:30,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094311350] [2021-06-12 19:59:30,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094311350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:30,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831334559] [2021-06-12 19:59:30,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:30,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:30,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:30,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:30,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:30,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:30,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:30,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:30,515 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:30,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:30,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:30,533 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 19:59:30,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:30,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:30,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:30,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:30,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:30,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:30,599 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:30,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:30,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:30,615 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:67, output treesize:19 [2021-06-12 19:59:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:30,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831334559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:30,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:30,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:30,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65076946] [2021-06-12 19:59:30,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:30,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:30,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:30,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:30,689 INFO L87 Difference]: Start difference. First operand 438 states and 1370 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:30,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:30,971 INFO L93 Difference]: Finished difference Result 612 states and 1866 transitions. [2021-06-12 19:59:30,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:30,972 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:30,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:30,973 INFO L225 Difference]: With dead ends: 612 [2021-06-12 19:59:30,973 INFO L226 Difference]: Without dead ends: 585 [2021-06-12 19:59:30,973 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 281.6ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:59:30,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-12 19:59:30,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 444. [2021-06-12 19:59:30,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 3.1331828442437923) internal successors, (1388), 443 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:30,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1388 transitions. [2021-06-12 19:59:30,978 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1388 transitions. Word has length 21 [2021-06-12 19:59:30,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:30,978 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 1388 transitions. [2021-06-12 19:59:30,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:30,978 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1388 transitions. [2021-06-12 19:59:30,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:30,978 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:30,978 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:31,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1394,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:31,179 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:31,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:31,179 INFO L82 PathProgramCache]: Analyzing trace with hash -800658677, now seen corresponding path program 311 times [2021-06-12 19:59:31,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:31,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598770219] [2021-06-12 19:59:31,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:31,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:31,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:31,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:31,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598770219] [2021-06-12 19:59:31,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598770219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:31,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218006844] [2021-06-12 19:59:31,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:31,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:59:31,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:31,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:59:31,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:31,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:31,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:31,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:31,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:31,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:31,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:31,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:31,371 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 19:59:31,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:31,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:31,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:31,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:31,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:31,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:31,429 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:31,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:31,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:31,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:31,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:31,462 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:31,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:31,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:31,464 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:31,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:31,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:31,493 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:89, output treesize:31 [2021-06-12 19:59:31,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:31,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218006844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:31,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:31,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:31,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336615675] [2021-06-12 19:59:31,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:31,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:31,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:31,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:31,570 INFO L87 Difference]: Start difference. First operand 444 states and 1388 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:31,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:31,755 INFO L93 Difference]: Finished difference Result 525 states and 1608 transitions. [2021-06-12 19:59:31,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:31,755 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:31,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:31,756 INFO L225 Difference]: With dead ends: 525 [2021-06-12 19:59:31,756 INFO L226 Difference]: Without dead ends: 506 [2021-06-12 19:59:31,756 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 233.0ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:31,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-12 19:59:31,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 430. [2021-06-12 19:59:31,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.121212121212121) internal successors, (1339), 429 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:31,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1339 transitions. [2021-06-12 19:59:31,760 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1339 transitions. Word has length 21 [2021-06-12 19:59:31,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:31,760 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1339 transitions. [2021-06-12 19:59:31,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:31,760 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1339 transitions. [2021-06-12 19:59:31,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:31,761 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:31,761 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:31,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1406 [2021-06-12 19:59:31,962 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:31,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:31,962 INFO L82 PathProgramCache]: Analyzing trace with hash -255286023, now seen corresponding path program 312 times [2021-06-12 19:59:31,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:31,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140623132] [2021-06-12 19:59:31,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:32,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:32,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:32,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140623132] [2021-06-12 19:59:32,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140623132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:32,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147604563] [2021-06-12 19:59:32,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:32,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:59:32,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:32,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:32,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:32,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:32,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:32,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:32,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:32,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:32,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:32,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:32,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:32,152 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 19:59:32,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:32,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:32,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:32,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:32,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:32,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:32,255 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:32,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:32,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:32,263 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:7 [2021-06-12 19:59:32,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:32,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147604563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:32,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:32,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:59:32,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497475084] [2021-06-12 19:59:32,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:59:32,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:32,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:59:32,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:59:32,273 INFO L87 Difference]: Start difference. First operand 430 states and 1339 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:32,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:32,424 INFO L93 Difference]: Finished difference Result 534 states and 1627 transitions. [2021-06-12 19:59:32,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:32,425 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:32,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:32,425 INFO L225 Difference]: With dead ends: 534 [2021-06-12 19:59:32,426 INFO L226 Difference]: Without dead ends: 513 [2021-06-12 19:59:32,426 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 181.2ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:32,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-12 19:59:32,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 430. [2021-06-12 19:59:32,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.1305361305361306) internal successors, (1343), 429 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:32,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1343 transitions. [2021-06-12 19:59:32,430 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1343 transitions. Word has length 21 [2021-06-12 19:59:32,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:32,430 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1343 transitions. [2021-06-12 19:59:32,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:32,430 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1343 transitions. [2021-06-12 19:59:32,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:32,431 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:32,431 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:32,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1415,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:32,631 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:32,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:32,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1974270705, now seen corresponding path program 313 times [2021-06-12 19:59:32,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:32,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396490485] [2021-06-12 19:59:32,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:32,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:32,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:32,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:32,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396490485] [2021-06-12 19:59:32,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396490485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:32,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813328251] [2021-06-12 19:59:32,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:32,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:32,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:32,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:32,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:32,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:32,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:32,793 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:32,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:32,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:32,811 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 19:59:32,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:32,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:32,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:32,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:32,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:32,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:32,881 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:32,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:32,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:32,889 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:10 [2021-06-12 19:59:32,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:32,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813328251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:32,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:32,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:59:32,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081798914] [2021-06-12 19:59:32,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:59:32,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:32,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:59:32,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:32,904 INFO L87 Difference]: Start difference. First operand 430 states and 1343 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:33,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:33,063 INFO L93 Difference]: Finished difference Result 534 states and 1627 transitions. [2021-06-12 19:59:33,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:33,063 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:33,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:33,064 INFO L225 Difference]: With dead ends: 534 [2021-06-12 19:59:33,064 INFO L226 Difference]: Without dead ends: 513 [2021-06-12 19:59:33,064 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 142.7ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:33,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-12 19:59:33,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 426. [2021-06-12 19:59:33,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.12) internal successors, (1326), 425 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:33,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1326 transitions. [2021-06-12 19:59:33,068 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1326 transitions. Word has length 21 [2021-06-12 19:59:33,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:33,069 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1326 transitions. [2021-06-12 19:59:33,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:33,069 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1326 transitions. [2021-06-12 19:59:33,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:33,069 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:33,069 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:33,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1422 [2021-06-12 19:59:33,269 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:33,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:33,270 INFO L82 PathProgramCache]: Analyzing trace with hash -577883527, now seen corresponding path program 314 times [2021-06-12 19:59:33,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:33,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632449634] [2021-06-12 19:59:33,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:33,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:33,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:33,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632449634] [2021-06-12 19:59:33,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632449634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:33,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612489991] [2021-06-12 19:59:33,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:33,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:33,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:33,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:33,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:33,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:33,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:33,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:33,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:33,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:33,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 19:59:33,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:33,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:33,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:33,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:33,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:33,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:33,532 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:33,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:33,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:33,539 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:7 [2021-06-12 19:59:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:33,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612489991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:33,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:33,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:33,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915819358] [2021-06-12 19:59:33,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:33,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:33,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:33,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:33,568 INFO L87 Difference]: Start difference. First operand 426 states and 1326 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:33,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:33,836 INFO L93 Difference]: Finished difference Result 593 states and 1803 transitions. [2021-06-12 19:59:33,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:59:33,836 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:33,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:33,837 INFO L225 Difference]: With dead ends: 593 [2021-06-12 19:59:33,837 INFO L226 Difference]: Without dead ends: 572 [2021-06-12 19:59:33,837 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 299.5ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:59:33,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-12 19:59:33,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 428. [2021-06-12 19:59:33,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.117096018735363) internal successors, (1331), 427 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1331 transitions. [2021-06-12 19:59:33,842 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1331 transitions. Word has length 21 [2021-06-12 19:59:33,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:33,842 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 1331 transitions. [2021-06-12 19:59:33,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:33,842 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1331 transitions. [2021-06-12 19:59:33,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:33,842 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:33,842 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:34,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1426,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:34,043 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:34,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:34,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1907811689, now seen corresponding path program 315 times [2021-06-12 19:59:34,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:34,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998599930] [2021-06-12 19:59:34,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:34,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:34,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:34,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998599930] [2021-06-12 19:59:34,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998599930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:34,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131394519] [2021-06-12 19:59:34,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:34,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:59:34,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:34,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:34,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:34,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:34,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:34,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:34,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:34,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:34,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 19:59:34,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:34,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:34,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:34,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:34,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:34,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:34,259 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:34,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:34,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:34,267 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:10 [2021-06-12 19:59:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:34,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131394519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:34,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:34,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:59:34,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201510406] [2021-06-12 19:59:34,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:59:34,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:34,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:59:34,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:34,282 INFO L87 Difference]: Start difference. First operand 428 states and 1331 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:34,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:34,407 INFO L93 Difference]: Finished difference Result 515 states and 1576 transitions. [2021-06-12 19:59:34,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:34,407 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:34,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:34,407 INFO L225 Difference]: With dead ends: 515 [2021-06-12 19:59:34,407 INFO L226 Difference]: Without dead ends: 494 [2021-06-12 19:59:34,408 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:34,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-12 19:59:34,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 425. [2021-06-12 19:59:34,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 3.1108490566037736) internal successors, (1319), 424 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:34,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1319 transitions. [2021-06-12 19:59:34,412 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1319 transitions. Word has length 21 [2021-06-12 19:59:34,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:34,412 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 1319 transitions. [2021-06-12 19:59:34,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:34,412 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1319 transitions. [2021-06-12 19:59:34,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:34,412 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:34,412 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:34,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1432,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:34,613 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:34,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:34,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1472074119, now seen corresponding path program 316 times [2021-06-12 19:59:34,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:34,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498654186] [2021-06-12 19:59:34,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:34,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:34,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498654186] [2021-06-12 19:59:34,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498654186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:34,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000008726] [2021-06-12 19:59:34,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:34,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:34,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:34,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:34,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:34,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:34,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:34,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:34,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:34,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:34,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 19:59:34,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:34,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:34,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:34,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:34,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:34,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:34,851 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:34,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:34,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:34,859 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:10 [2021-06-12 19:59:34,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:34,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000008726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:34,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:34,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:34,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570421337] [2021-06-12 19:59:34,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:34,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:34,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:34,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:34,904 INFO L87 Difference]: Start difference. First operand 425 states and 1319 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:35,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:35,151 INFO L93 Difference]: Finished difference Result 555 states and 1679 transitions. [2021-06-12 19:59:35,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:35,151 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:35,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:35,152 INFO L225 Difference]: With dead ends: 555 [2021-06-12 19:59:35,152 INFO L226 Difference]: Without dead ends: 534 [2021-06-12 19:59:35,152 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 250.7ms TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:59:35,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-12 19:59:35,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 407. [2021-06-12 19:59:35,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.0935960591133007) internal successors, (1256), 406 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:35,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1256 transitions. [2021-06-12 19:59:35,156 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1256 transitions. Word has length 21 [2021-06-12 19:59:35,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:35,156 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 1256 transitions. [2021-06-12 19:59:35,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:35,157 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1256 transitions. [2021-06-12 19:59:35,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:35,157 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:35,157 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:35,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1434 [2021-06-12 19:59:35,357 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:35,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:35,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1119238299, now seen corresponding path program 317 times [2021-06-12 19:59:35,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:35,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980850738] [2021-06-12 19:59:35,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:35,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:35,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:35,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:35,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980850738] [2021-06-12 19:59:35,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980850738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:35,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671554272] [2021-06-12 19:59:35,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:35,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:59:35,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:35,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:35,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:35,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:35,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:35,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:35,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:35,470 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 19:59:35,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:35,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:35,495 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:35,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 19:59:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:35,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671554272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:35,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:35,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:59:35,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195402967] [2021-06-12 19:59:35,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:59:35,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:35,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:59:35,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:59:35,504 INFO L87 Difference]: Start difference. First operand 407 states and 1256 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:35,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:35,655 INFO L93 Difference]: Finished difference Result 803 states and 2395 transitions. [2021-06-12 19:59:35,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:35,655 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:35,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:35,656 INFO L225 Difference]: With dead ends: 803 [2021-06-12 19:59:35,656 INFO L226 Difference]: Without dead ends: 781 [2021-06-12 19:59:35,657 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:35,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-06-12 19:59:35,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 415. [2021-06-12 19:59:35,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.101449275362319) internal successors, (1284), 414 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:35,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1284 transitions. [2021-06-12 19:59:35,662 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1284 transitions. Word has length 21 [2021-06-12 19:59:35,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:35,662 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1284 transitions. [2021-06-12 19:59:35,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:35,662 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1284 transitions. [2021-06-12 19:59:35,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:35,662 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:35,662 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:35,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1436,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:35,863 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:35,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:35,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1085940175, now seen corresponding path program 318 times [2021-06-12 19:59:35,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:35,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097810157] [2021-06-12 19:59:35,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:35,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:35,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:35,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097810157] [2021-06-12 19:59:35,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097810157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:35,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592911283] [2021-06-12 19:59:35,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:35,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:59:35,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:35,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:35,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:35,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:35,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:35,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:35,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:35,991 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 19:59:36,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:36,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:36,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:36,053 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:36,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:36,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 19:59:36,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:36,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592911283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:36,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:36,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:36,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736271211] [2021-06-12 19:59:36,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:36,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:36,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:36,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:36,079 INFO L87 Difference]: Start difference. First operand 415 states and 1284 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:36,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:36,958 INFO L93 Difference]: Finished difference Result 932 states and 2784 transitions. [2021-06-12 19:59:36,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 19:59:36,958 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:36,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:36,960 INFO L225 Difference]: With dead ends: 932 [2021-06-12 19:59:36,960 INFO L226 Difference]: Without dead ends: 913 [2021-06-12 19:59:36,960 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 632.4ms TimeCoverageRelationStatistics Valid=364, Invalid=1706, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 19:59:36,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-06-12 19:59:36,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 421. [2021-06-12 19:59:36,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.111904761904762) internal successors, (1307), 420 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:36,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1307 transitions. [2021-06-12 19:59:36,965 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1307 transitions. Word has length 21 [2021-06-12 19:59:36,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:36,966 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1307 transitions. [2021-06-12 19:59:36,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:36,966 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1307 transitions. [2021-06-12 19:59:36,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:36,966 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:36,966 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:37,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1439 [2021-06-12 19:59:37,167 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:37,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:37,167 INFO L82 PathProgramCache]: Analyzing trace with hash 2042705297, now seen corresponding path program 319 times [2021-06-12 19:59:37,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:37,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548854943] [2021-06-12 19:59:37,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:37,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:37,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:37,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548854943] [2021-06-12 19:59:37,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548854943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:37,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126345184] [2021-06-12 19:59:37,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:37,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:37,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:37,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:37,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:37,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:37,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:37,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 19:59:37,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:37,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:37,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:59:37,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:37,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:37,344 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:37,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:37,344 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:5 [2021-06-12 19:59:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:37,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126345184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:37,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:37,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:59:37,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98344507] [2021-06-12 19:59:37,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:59:37,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:37,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:59:37,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:37,370 INFO L87 Difference]: Start difference. First operand 421 states and 1307 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:37,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:37,752 INFO L93 Difference]: Finished difference Result 845 states and 2529 transitions. [2021-06-12 19:59:37,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:59:37,752 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:37,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:37,753 INFO L225 Difference]: With dead ends: 845 [2021-06-12 19:59:37,754 INFO L226 Difference]: Without dead ends: 806 [2021-06-12 19:59:37,754 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 295.7ms TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:59:37,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-06-12 19:59:37,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 422. [2021-06-12 19:59:37,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.1045130641330165) internal successors, (1307), 421 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:37,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1307 transitions. [2021-06-12 19:59:37,759 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1307 transitions. Word has length 21 [2021-06-12 19:59:37,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:37,759 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 1307 transitions. [2021-06-12 19:59:37,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:37,759 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1307 transitions. [2021-06-12 19:59:37,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:37,760 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:37,760 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:37,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1445 [2021-06-12 19:59:37,960 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:37,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:37,961 INFO L82 PathProgramCache]: Analyzing trace with hash -856760017, now seen corresponding path program 320 times [2021-06-12 19:59:37,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:37,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969493601] [2021-06-12 19:59:37,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:38,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:38,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969493601] [2021-06-12 19:59:38,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969493601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:38,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060140215] [2021-06-12 19:59:38,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:38,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:38,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:38,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:38,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:38,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:38,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:38,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:38,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:38,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:38,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:38,085 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 19:59:38,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:38,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:38,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:38,150 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:38,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:38,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 19:59:38,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:38,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060140215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:38,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:38,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:59:38,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676959226] [2021-06-12 19:59:38,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:59:38,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:38,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:59:38,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:38,180 INFO L87 Difference]: Start difference. First operand 422 states and 1307 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:38,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:38,874 INFO L93 Difference]: Finished difference Result 908 states and 2743 transitions. [2021-06-12 19:59:38,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:59:38,874 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:38,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:38,875 INFO L225 Difference]: With dead ends: 908 [2021-06-12 19:59:38,875 INFO L226 Difference]: Without dead ends: 889 [2021-06-12 19:59:38,876 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 524.2ms TimeCoverageRelationStatistics Valid=250, Invalid=1156, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:59:38,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2021-06-12 19:59:38,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 432. [2021-06-12 19:59:38,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.1183294663573085) internal successors, (1344), 431 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:38,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1344 transitions. [2021-06-12 19:59:38,886 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1344 transitions. Word has length 21 [2021-06-12 19:59:38,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:38,886 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 1344 transitions. [2021-06-12 19:59:38,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:38,886 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1344 transitions. [2021-06-12 19:59:38,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:38,887 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:38,887 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:39,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1448,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:39,087 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:39,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:39,088 INFO L82 PathProgramCache]: Analyzing trace with hash 829631823, now seen corresponding path program 321 times [2021-06-12 19:59:39,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:39,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356453149] [2021-06-12 19:59:39,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:39,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:39,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:39,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356453149] [2021-06-12 19:59:39,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356453149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:39,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547666903] [2021-06-12 19:59:39,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:39,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:59:39,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:39,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:39,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:39,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:39,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:39,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:39,205 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:39,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:39,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:39,211 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 19:59:39,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:39,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:39,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:39,262 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:39,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:39,267 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:39,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:39,268 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:13 [2021-06-12 19:59:39,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:39,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547666903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:39,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:39,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:59:39,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066994367] [2021-06-12 19:59:39,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:59:39,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:39,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:59:39,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:39,310 INFO L87 Difference]: Start difference. First operand 432 states and 1344 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:40,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:40,111 INFO L93 Difference]: Finished difference Result 986 states and 2968 transitions. [2021-06-12 19:59:40,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:59:40,111 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:40,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:40,112 INFO L225 Difference]: With dead ends: 986 [2021-06-12 19:59:40,112 INFO L226 Difference]: Without dead ends: 963 [2021-06-12 19:59:40,112 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 561.2ms TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 19:59:40,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-06-12 19:59:40,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 435. [2021-06-12 19:59:40,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.133640552995392) internal successors, (1360), 434 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:40,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1360 transitions. [2021-06-12 19:59:40,118 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1360 transitions. Word has length 21 [2021-06-12 19:59:40,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:40,118 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 1360 transitions. [2021-06-12 19:59:40,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:40,118 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1360 transitions. [2021-06-12 19:59:40,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:40,119 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:40,119 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:40,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1454 [2021-06-12 19:59:40,319 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:40,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:40,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1493592683, now seen corresponding path program 322 times [2021-06-12 19:59:40,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:40,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132747296] [2021-06-12 19:59:40,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:40,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:40,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:40,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132747296] [2021-06-12 19:59:40,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132747296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:40,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252022174] [2021-06-12 19:59:40,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:40,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:40,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:40,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:40,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:40,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:40,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:40,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:40,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:40,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:40,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:40,438 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 19:59:40,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:40,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:40,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:40,464 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:40,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:40,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 19:59:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:40,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252022174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:40,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:40,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:59:40,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156503524] [2021-06-12 19:59:40,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:59:40,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:40,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:59:40,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:59:40,473 INFO L87 Difference]: Start difference. First operand 435 states and 1360 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:40,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:40,636 INFO L93 Difference]: Finished difference Result 833 states and 2532 transitions. [2021-06-12 19:59:40,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:40,637 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:40,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:40,638 INFO L225 Difference]: With dead ends: 833 [2021-06-12 19:59:40,638 INFO L226 Difference]: Without dead ends: 811 [2021-06-12 19:59:40,638 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 112.9ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:40,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-06-12 19:59:40,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 438. [2021-06-12 19:59:40,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.130434782608696) internal successors, (1368), 437 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:40,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1368 transitions. [2021-06-12 19:59:40,643 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1368 transitions. Word has length 21 [2021-06-12 19:59:40,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:40,643 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1368 transitions. [2021-06-12 19:59:40,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:40,644 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1368 transitions. [2021-06-12 19:59:40,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:40,644 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:40,644 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:40,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1461,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:40,844 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:40,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:40,845 INFO L82 PathProgramCache]: Analyzing trace with hash -920621675, now seen corresponding path program 323 times [2021-06-12 19:59:40,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:40,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285612] [2021-06-12 19:59:40,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:40,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:40,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:40,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285612] [2021-06-12 19:59:40,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:40,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682304841] [2021-06-12 19:59:40,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:40,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:59:40,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:40,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:40,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:40,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:40,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:40,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:40,953 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:40,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:40,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:40,959 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 19:59:40,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:40,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:40,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:40,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:40,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:40,990 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:40,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:40,990 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-12 19:59:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:41,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682304841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:41,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:41,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:59:41,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262200773] [2021-06-12 19:59:41,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:59:41,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:41,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:59:41,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:59:41,007 INFO L87 Difference]: Start difference. First operand 438 states and 1368 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:41,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:41,173 INFO L93 Difference]: Finished difference Result 836 states and 2534 transitions. [2021-06-12 19:59:41,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:41,173 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:41,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:41,174 INFO L225 Difference]: With dead ends: 836 [2021-06-12 19:59:41,174 INFO L226 Difference]: Without dead ends: 807 [2021-06-12 19:59:41,174 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 115.7ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:41,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-06-12 19:59:41,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 429. [2021-06-12 19:59:41,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.121495327102804) internal successors, (1336), 428 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:41,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1336 transitions. [2021-06-12 19:59:41,179 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1336 transitions. Word has length 21 [2021-06-12 19:59:41,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:41,180 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1336 transitions. [2021-06-12 19:59:41,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:41,180 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1336 transitions. [2021-06-12 19:59:41,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:41,180 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:41,180 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:41,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1465 [2021-06-12 19:59:41,381 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:41,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:41,381 INFO L82 PathProgramCache]: Analyzing trace with hash -294750883, now seen corresponding path program 324 times [2021-06-12 19:59:41,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:41,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837147082] [2021-06-12 19:59:41,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:41,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:41,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:41,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837147082] [2021-06-12 19:59:41,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837147082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:41,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175491487] [2021-06-12 19:59:41,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:41,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:59:41,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:41,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:41,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:41,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:41,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:41,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:41,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:41,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 19:59:41,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:41,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:41,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:41,544 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:41,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:41,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 19:59:41,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:41,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175491487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:41,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:41,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:59:41,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856969755] [2021-06-12 19:59:41,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:59:41,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:41,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:59:41,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:41,568 INFO L87 Difference]: Start difference. First operand 429 states and 1336 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:42,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:42,244 INFO L93 Difference]: Finished difference Result 845 states and 2541 transitions. [2021-06-12 19:59:42,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:59:42,244 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:42,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:42,246 INFO L225 Difference]: With dead ends: 845 [2021-06-12 19:59:42,246 INFO L226 Difference]: Without dead ends: 826 [2021-06-12 19:59:42,246 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 483.1ms TimeCoverageRelationStatistics Valid=278, Invalid=1204, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 19:59:42,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-06-12 19:59:42,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 437. [2021-06-12 19:59:42,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 3.1192660550458715) internal successors, (1360), 436 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:42,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1360 transitions. [2021-06-12 19:59:42,251 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1360 transitions. Word has length 21 [2021-06-12 19:59:42,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:42,251 INFO L482 AbstractCegarLoop]: Abstraction has 437 states and 1360 transitions. [2021-06-12 19:59:42,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:42,251 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1360 transitions. [2021-06-12 19:59:42,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:42,252 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:42,252 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:42,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1470,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:42,452 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:42,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:42,453 INFO L82 PathProgramCache]: Analyzing trace with hash -96134259, now seen corresponding path program 325 times [2021-06-12 19:59:42,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:42,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587504590] [2021-06-12 19:59:42,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:42,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:42,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:42,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:42,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587504590] [2021-06-12 19:59:42,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587504590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:42,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564078127] [2021-06-12 19:59:42,534 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:42,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:42,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:42,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:42,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:42,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:42,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:42,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 19:59:42,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:42,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:42,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:42,630 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:42,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:42,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 19:59:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:42,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564078127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:42,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:42,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:59:42,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156007022] [2021-06-12 19:59:42,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:59:42,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:42,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:59:42,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:59:42,645 INFO L87 Difference]: Start difference. First operand 437 states and 1360 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:42,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:42,785 INFO L93 Difference]: Finished difference Result 560 states and 1715 transitions. [2021-06-12 19:59:42,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:42,785 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:42,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:42,786 INFO L225 Difference]: With dead ends: 560 [2021-06-12 19:59:42,786 INFO L226 Difference]: Without dead ends: 541 [2021-06-12 19:59:42,786 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:59:42,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-06-12 19:59:42,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 433. [2021-06-12 19:59:42,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.1203703703703702) internal successors, (1348), 432 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:42,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1348 transitions. [2021-06-12 19:59:42,790 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1348 transitions. Word has length 21 [2021-06-12 19:59:42,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:42,790 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1348 transitions. [2021-06-12 19:59:42,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:42,790 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1348 transitions. [2021-06-12 19:59:42,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:42,791 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:42,791 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:42,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1472,326 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:42,991 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:42,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:42,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1012015205, now seen corresponding path program 326 times [2021-06-12 19:59:42,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:42,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177982503] [2021-06-12 19:59:42,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:43,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:43,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:43,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177982503] [2021-06-12 19:59:43,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177982503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:43,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873569434] [2021-06-12 19:59:43,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:43,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:43,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:43,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:43,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:43,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:43,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:43,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:43,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:43,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:43,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:43,112 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 19:59:43,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:43,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:43,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:43,128 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:43,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:43,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 19:59:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:43,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873569434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:43,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:43,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:59:43,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402230696] [2021-06-12 19:59:43,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:59:43,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:43,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:59:43,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:59:43,136 INFO L87 Difference]: Start difference. First operand 433 states and 1348 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:43,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:43,283 INFO L93 Difference]: Finished difference Result 684 states and 2073 transitions. [2021-06-12 19:59:43,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:43,283 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:43,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:43,284 INFO L225 Difference]: With dead ends: 684 [2021-06-12 19:59:43,284 INFO L226 Difference]: Without dead ends: 662 [2021-06-12 19:59:43,284 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:43,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-06-12 19:59:43,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 440. [2021-06-12 19:59:43,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 3.1252847380410023) internal successors, (1372), 439 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:43,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1372 transitions. [2021-06-12 19:59:43,289 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1372 transitions. Word has length 21 [2021-06-12 19:59:43,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:43,289 INFO L482 AbstractCegarLoop]: Abstraction has 440 states and 1372 transitions. [2021-06-12 19:59:43,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:43,289 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1372 transitions. [2021-06-12 19:59:43,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:43,290 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:43,290 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:43,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1474 [2021-06-12 19:59:43,490 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:43,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:43,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1436087115, now seen corresponding path program 327 times [2021-06-12 19:59:43,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:43,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90980484] [2021-06-12 19:59:43,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:43,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:43,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:43,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90980484] [2021-06-12 19:59:43,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90980484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:43,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972226965] [2021-06-12 19:59:43,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:43,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:59:43,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:43,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:43,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:43,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:43,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:43,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:43,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:43,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 19:59:43,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:43,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:43,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:59:43,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:43,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:43,649 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:43,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:43,650 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:5 [2021-06-12 19:59:43,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:43,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972226965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:43,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:43,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:59:43,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303000855] [2021-06-12 19:59:43,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:59:43,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:43,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:59:43,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:59:43,658 INFO L87 Difference]: Start difference. First operand 440 states and 1372 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:43,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:43,835 INFO L93 Difference]: Finished difference Result 692 states and 2093 transitions. [2021-06-12 19:59:43,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:43,835 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:43,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:43,836 INFO L225 Difference]: With dead ends: 692 [2021-06-12 19:59:43,836 INFO L226 Difference]: Without dead ends: 659 [2021-06-12 19:59:43,836 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:43,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-06-12 19:59:43,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 440. [2021-06-12 19:59:43,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 3.1184510250569475) internal successors, (1369), 439 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:43,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1369 transitions. [2021-06-12 19:59:43,841 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1369 transitions. Word has length 21 [2021-06-12 19:59:43,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:43,841 INFO L482 AbstractCegarLoop]: Abstraction has 440 states and 1369 transitions. [2021-06-12 19:59:43,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:43,841 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1369 transitions. [2021-06-12 19:59:43,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:43,842 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:43,842 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:44,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1477,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:44,042 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:44,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:44,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1402199153, now seen corresponding path program 328 times [2021-06-12 19:59:44,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:44,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490505122] [2021-06-12 19:59:44,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:44,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:44,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:44,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:44,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490505122] [2021-06-12 19:59:44,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490505122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:44,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121486642] [2021-06-12 19:59:44,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:44,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:44,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:44,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:44,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:44,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:44,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:44,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:44,159 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:44,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:44,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:44,165 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 19:59:44,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:44,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:44,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:44,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:44,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:44,185 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:44,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:44,185 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-12 19:59:44,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:44,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121486642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:44,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:44,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:59:44,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889816084] [2021-06-12 19:59:44,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:59:44,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:44,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:59:44,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:59:44,202 INFO L87 Difference]: Start difference. First operand 440 states and 1369 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:44,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:44,371 INFO L93 Difference]: Finished difference Result 730 states and 2211 transitions. [2021-06-12 19:59:44,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:44,372 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:44,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:44,373 INFO L225 Difference]: With dead ends: 730 [2021-06-12 19:59:44,373 INFO L226 Difference]: Without dead ends: 701 [2021-06-12 19:59:44,373 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:44,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-06-12 19:59:44,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 441. [2021-06-12 19:59:44,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 3.125) internal successors, (1375), 440 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:44,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1375 transitions. [2021-06-12 19:59:44,378 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1375 transitions. Word has length 21 [2021-06-12 19:59:44,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:44,378 INFO L482 AbstractCegarLoop]: Abstraction has 441 states and 1375 transitions. [2021-06-12 19:59:44,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:44,378 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1375 transitions. [2021-06-12 19:59:44,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:44,378 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:44,378 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:44,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1480,329 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:44,579 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:44,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:44,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1798069225, now seen corresponding path program 329 times [2021-06-12 19:59:44,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:44,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492541332] [2021-06-12 19:59:44,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:44,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:44,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:44,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492541332] [2021-06-12 19:59:44,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492541332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:44,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998865099] [2021-06-12 19:59:44,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:44,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:44,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:44,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:44,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:44,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:44,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:44,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:44,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:44,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 19:59:44,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:44,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:44,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:59:44,725 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:44,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:44,731 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:44,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:44,732 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 19:59:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:44,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998865099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:44,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:44,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:59:44,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503194617] [2021-06-12 19:59:44,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:59:44,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:44,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:59:44,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:59:44,761 INFO L87 Difference]: Start difference. First operand 441 states and 1375 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:44,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:44,935 INFO L93 Difference]: Finished difference Result 687 states and 2075 transitions. [2021-06-12 19:59:44,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:44,935 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:44,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:44,936 INFO L225 Difference]: With dead ends: 687 [2021-06-12 19:59:44,936 INFO L226 Difference]: Without dead ends: 660 [2021-06-12 19:59:44,936 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 130.7ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:44,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-06-12 19:59:44,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 436. [2021-06-12 19:59:44,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 3.117241379310345) internal successors, (1356), 435 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:44,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1356 transitions. [2021-06-12 19:59:44,941 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1356 transitions. Word has length 21 [2021-06-12 19:59:44,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:44,941 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 1356 transitions. [2021-06-12 19:59:44,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:44,941 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1356 transitions. [2021-06-12 19:59:44,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:44,942 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:44,942 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:45,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1484 [2021-06-12 19:59:45,142 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:45,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:45,142 INFO L82 PathProgramCache]: Analyzing trace with hash 704584967, now seen corresponding path program 330 times [2021-06-12 19:59:45,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:45,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632495891] [2021-06-12 19:59:45,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:45,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:45,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632495891] [2021-06-12 19:59:45,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632495891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:45,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637391783] [2021-06-12 19:59:45,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:45,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:59:45,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:45,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:45,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:45,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:45,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:45,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-06-12 19:59:45,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 19:59:45,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 19:59:45,278 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:45,284 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:45,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:45,284 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-12 19:59:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:45,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637391783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:45,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:45,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:59:45,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661959332] [2021-06-12 19:59:45,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:59:45,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:45,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:59:45,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:59:45,307 INFO L87 Difference]: Start difference. First operand 436 states and 1356 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:45,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:45,501 INFO L93 Difference]: Finished difference Result 697 states and 2107 transitions. [2021-06-12 19:59:45,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:45,501 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:45,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:45,502 INFO L225 Difference]: With dead ends: 697 [2021-06-12 19:59:45,502 INFO L226 Difference]: Without dead ends: 661 [2021-06-12 19:59:45,502 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:59:45,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-06-12 19:59:45,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 437. [2021-06-12 19:59:45,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 3.121559633027523) internal successors, (1361), 436 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:45,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1361 transitions. [2021-06-12 19:59:45,507 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1361 transitions. Word has length 21 [2021-06-12 19:59:45,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:45,507 INFO L482 AbstractCegarLoop]: Abstraction has 437 states and 1361 transitions. [2021-06-12 19:59:45,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:45,507 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1361 transitions. [2021-06-12 19:59:45,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:45,507 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:45,508 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:45,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1490 [2021-06-12 19:59:45,708 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:45,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:45,708 INFO L82 PathProgramCache]: Analyzing trace with hash -390113951, now seen corresponding path program 331 times [2021-06-12 19:59:45,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:45,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713824319] [2021-06-12 19:59:45,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:45,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:45,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:45,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:45,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713824319] [2021-06-12 19:59:45,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713824319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:45,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211848877] [2021-06-12 19:59:45,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:45,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:45,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:45,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:45,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:45,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:45,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:45,836 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 19:59:45,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:45,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:45,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:45,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:45,873 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:45,873 INFO L518 ElimStorePlain]: Eliminatee v_prenex_51 vanished before elimination [2021-06-12 19:59:45,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:45,874 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:13 [2021-06-12 19:59:45,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:45,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211848877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:45,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:45,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:59:45,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823489838] [2021-06-12 19:59:45,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:59:45,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:45,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:59:45,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:59:45,902 INFO L87 Difference]: Start difference. First operand 437 states and 1361 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:46,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:46,111 INFO L93 Difference]: Finished difference Result 738 states and 2222 transitions. [2021-06-12 19:59:46,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:46,111 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:46,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:46,112 INFO L225 Difference]: With dead ends: 738 [2021-06-12 19:59:46,112 INFO L226 Difference]: Without dead ends: 711 [2021-06-12 19:59:46,112 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 162.7ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:46,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-06-12 19:59:46,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 457. [2021-06-12 19:59:46,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 3.142543859649123) internal successors, (1433), 456 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:46,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1433 transitions. [2021-06-12 19:59:46,118 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1433 transitions. Word has length 21 [2021-06-12 19:59:46,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:46,118 INFO L482 AbstractCegarLoop]: Abstraction has 457 states and 1433 transitions. [2021-06-12 19:59:46,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:46,118 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1433 transitions. [2021-06-12 19:59:46,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:46,118 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:46,118 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:46,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1493,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:46,319 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:46,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:46,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1490638987, now seen corresponding path program 332 times [2021-06-12 19:59:46,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:46,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182802032] [2021-06-12 19:59:46,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:46,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:46,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182802032] [2021-06-12 19:59:46,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182802032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:46,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213952848] [2021-06-12 19:59:46,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:46,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:46,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:46,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:46,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:46,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:46,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:46,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:46,451 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:46,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:46,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:46,457 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 19:59:46,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:46,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:46,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:46,489 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:46,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:46,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 19:59:46,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:46,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213952848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:46,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:46,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:59:46,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963529921] [2021-06-12 19:59:46,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:59:46,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:46,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:59:46,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:59:46,500 INFO L87 Difference]: Start difference. First operand 457 states and 1433 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:46,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:46,710 INFO L93 Difference]: Finished difference Result 698 states and 2107 transitions. [2021-06-12 19:59:46,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:46,710 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:46,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:46,711 INFO L225 Difference]: With dead ends: 698 [2021-06-12 19:59:46,711 INFO L226 Difference]: Without dead ends: 677 [2021-06-12 19:59:46,711 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:46,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-06-12 19:59:46,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 432. [2021-06-12 19:59:46,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.1345707656612527) internal successors, (1351), 431 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:46,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1351 transitions. [2021-06-12 19:59:46,716 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1351 transitions. Word has length 21 [2021-06-12 19:59:46,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:46,716 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 1351 transitions. [2021-06-12 19:59:46,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:46,717 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1351 transitions. [2021-06-12 19:59:46,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:46,717 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:46,717 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:46,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1501 [2021-06-12 19:59:46,917 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:46,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:46,918 INFO L82 PathProgramCache]: Analyzing trace with hash -393240531, now seen corresponding path program 333 times [2021-06-12 19:59:46,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:46,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649825778] [2021-06-12 19:59:46,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:46,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:46,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:46,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649825778] [2021-06-12 19:59:46,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649825778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:46,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996053799] [2021-06-12 19:59:46,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:47,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:59:47,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:47,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:47,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:47,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:47,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:47,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:47,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:47,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 19:59:47,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:47,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:47,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:47,096 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:47,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:47,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 19:59:47,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:47,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996053799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:47,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:47,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:59:47,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889837666] [2021-06-12 19:59:47,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:59:47,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:47,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:59:47,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:59:47,108 INFO L87 Difference]: Start difference. First operand 432 states and 1351 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:47,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:47,252 INFO L93 Difference]: Finished difference Result 601 states and 1845 transitions. [2021-06-12 19:59:47,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:47,252 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:47,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:47,253 INFO L225 Difference]: With dead ends: 601 [2021-06-12 19:59:47,253 INFO L226 Difference]: Without dead ends: 582 [2021-06-12 19:59:47,253 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:59:47,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-06-12 19:59:47,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 428. [2021-06-12 19:59:47,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.1358313817330212) internal successors, (1339), 427 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:47,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1339 transitions. [2021-06-12 19:59:47,258 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1339 transitions. Word has length 21 [2021-06-12 19:59:47,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:47,258 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 1339 transitions. [2021-06-12 19:59:47,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:47,258 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1339 transitions. [2021-06-12 19:59:47,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:47,258 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:47,258 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:47,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1504,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:47,459 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:47,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:47,459 INFO L82 PathProgramCache]: Analyzing trace with hash -715838035, now seen corresponding path program 334 times [2021-06-12 19:59:47,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:47,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567272528] [2021-06-12 19:59:47,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:47,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:47,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567272528] [2021-06-12 19:59:47,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567272528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:47,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499598877] [2021-06-12 19:59:47,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:47,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:47,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:47,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:47,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:47,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:47,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:47,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:47,610 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:47,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:47,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:47,619 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 19:59:47,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:47,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:47,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:47,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:47,658 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:47,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:47,666 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:47,666 INFO L518 ElimStorePlain]: Eliminatee v_prenex_52 vanished before elimination [2021-06-12 19:59:47,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:47,667 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:19 [2021-06-12 19:59:47,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:47,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499598877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:47,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:47,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:59:47,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096754279] [2021-06-12 19:59:47,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:59:47,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:47,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:59:47,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:59:47,690 INFO L87 Difference]: Start difference. First operand 428 states and 1339 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:47,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:47,873 INFO L93 Difference]: Finished difference Result 664 states and 2018 transitions. [2021-06-12 19:59:47,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:47,873 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:47,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:47,874 INFO L225 Difference]: With dead ends: 664 [2021-06-12 19:59:47,874 INFO L226 Difference]: Without dead ends: 641 [2021-06-12 19:59:47,874 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 168.1ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:47,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-06-12 19:59:47,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 432. [2021-06-12 19:59:47,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.1322505800464038) internal successors, (1350), 431 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:47,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1350 transitions. [2021-06-12 19:59:47,879 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1350 transitions. Word has length 21 [2021-06-12 19:59:47,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:47,879 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 1350 transitions. [2021-06-12 19:59:47,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:47,879 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1350 transitions. [2021-06-12 19:59:47,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:47,879 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:47,879 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:48,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1507,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:48,080 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:48,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:48,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1334119611, now seen corresponding path program 335 times [2021-06-12 19:59:48,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:48,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729124610] [2021-06-12 19:59:48,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:48,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:48,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:48,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:48,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729124610] [2021-06-12 19:59:48,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729124610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:48,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169298786] [2021-06-12 19:59:48,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:48,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:59:48,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:48,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:59:48,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:48,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:48,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:48,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:48,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:48,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:48,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:48,245 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 19:59:48,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:48,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:48,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:48,282 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:48,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:48,296 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:48,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:48,297 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:31 [2021-06-12 19:59:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:48,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169298786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:48,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:48,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:59:48,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552843219] [2021-06-12 19:59:48,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:59:48,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:48,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:59:48,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:48,370 INFO L87 Difference]: Start difference. First operand 432 states and 1350 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:48,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:48,785 INFO L93 Difference]: Finished difference Result 702 states and 2144 transitions. [2021-06-12 19:59:48,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:59:48,785 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:48,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:48,786 INFO L225 Difference]: With dead ends: 702 [2021-06-12 19:59:48,786 INFO L226 Difference]: Without dead ends: 683 [2021-06-12 19:59:48,786 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 326.7ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:59:48,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-06-12 19:59:48,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 427. [2021-06-12 19:59:48,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.1267605633802815) internal successors, (1332), 426 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:48,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1332 transitions. [2021-06-12 19:59:48,791 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1332 transitions. Word has length 21 [2021-06-12 19:59:48,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:48,792 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1332 transitions. [2021-06-12 19:59:48,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:48,792 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1332 transitions. [2021-06-12 19:59:48,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:48,792 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:48,792 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:48,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1514,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:48,993 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:48,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:48,993 INFO L82 PathProgramCache]: Analyzing trace with hash 946949131, now seen corresponding path program 336 times [2021-06-12 19:59:48,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:48,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048983477] [2021-06-12 19:59:48,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:49,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:49,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:49,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048983477] [2021-06-12 19:59:49,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048983477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:49,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934854820] [2021-06-12 19:59:49,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:49,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:59:49,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:49,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:49,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:49,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:49,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:49,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:49,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:49,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 19:59:49,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:49,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:49,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:49,143 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:49,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:49,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 19:59:49,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:49,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934854820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:49,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:49,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:59:49,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326424218] [2021-06-12 19:59:49,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:59:49,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:49,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:59:49,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:59:49,167 INFO L87 Difference]: Start difference. First operand 427 states and 1332 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:49,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:49,795 INFO L93 Difference]: Finished difference Result 929 states and 2770 transitions. [2021-06-12 19:59:49,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:59:49,795 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:49,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:49,796 INFO L225 Difference]: With dead ends: 929 [2021-06-12 19:59:49,796 INFO L226 Difference]: Without dead ends: 910 [2021-06-12 19:59:49,796 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 426.1ms TimeCoverageRelationStatistics Valid=274, Invalid=1132, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:59:49,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-06-12 19:59:49,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 427. [2021-06-12 19:59:49,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.107981220657277) internal successors, (1324), 426 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:49,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1324 transitions. [2021-06-12 19:59:49,806 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1324 transitions. Word has length 21 [2021-06-12 19:59:49,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:49,806 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1324 transitions. [2021-06-12 19:59:49,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:49,806 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1324 transitions. [2021-06-12 19:59:49,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:49,806 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:49,806 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:50,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1521 [2021-06-12 19:59:50,007 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:50,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:50,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1145565755, now seen corresponding path program 337 times [2021-06-12 19:59:50,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:50,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168046228] [2021-06-12 19:59:50,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:50,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:50,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:50,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168046228] [2021-06-12 19:59:50,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168046228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:50,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569055109] [2021-06-12 19:59:50,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:50,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:50,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:50,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:50,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:50,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:50,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:50,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 19:59:50,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:50,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:50,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:50,139 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:50,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:50,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 19:59:50,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:50,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569055109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:50,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:50,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:59:50,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119081664] [2021-06-12 19:59:50,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:59:50,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:50,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:59:50,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:59:50,152 INFO L87 Difference]: Start difference. First operand 427 states and 1324 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:50,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:50,278 INFO L93 Difference]: Finished difference Result 680 states and 2039 transitions. [2021-06-12 19:59:50,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:50,278 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:50,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:50,279 INFO L225 Difference]: With dead ends: 680 [2021-06-12 19:59:50,279 INFO L226 Difference]: Without dead ends: 661 [2021-06-12 19:59:50,279 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:59:50,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-06-12 19:59:50,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 407. [2021-06-12 19:59:50,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.0935960591133007) internal successors, (1256), 406 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:50,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1256 transitions. [2021-06-12 19:59:50,284 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1256 transitions. Word has length 21 [2021-06-12 19:59:50,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:50,284 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 1256 transitions. [2021-06-12 19:59:50,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:50,284 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1256 transitions. [2021-06-12 19:59:50,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:50,285 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:50,285 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:50,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1523 [2021-06-12 19:59:50,485 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:50,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:50,485 INFO L82 PathProgramCache]: Analyzing trace with hash 2087738507, now seen corresponding path program 338 times [2021-06-12 19:59:50,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:50,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420867631] [2021-06-12 19:59:50,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:50,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:50,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420867631] [2021-06-12 19:59:50,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420867631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:50,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832369151] [2021-06-12 19:59:50,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:50,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:50,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:50,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:50,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:50,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:50,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:50,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:50,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:50,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 19:59:50,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:50,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:50,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:50,611 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:50,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:50,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 19:59:50,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:50,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832369151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:50,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:50,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:59:50,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264586844] [2021-06-12 19:59:50,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:59:50,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:50,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:59:50,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:59:50,620 INFO L87 Difference]: Start difference. First operand 407 states and 1256 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:50,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:50,728 INFO L93 Difference]: Finished difference Result 655 states and 1972 transitions. [2021-06-12 19:59:50,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:50,729 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:50,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:50,729 INFO L225 Difference]: With dead ends: 655 [2021-06-12 19:59:50,729 INFO L226 Difference]: Without dead ends: 636 [2021-06-12 19:59:50,730 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:59:50,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-06-12 19:59:50,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 422. [2021-06-12 19:59:50,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.0997624703087885) internal successors, (1305), 421 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:50,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1305 transitions. [2021-06-12 19:59:50,734 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1305 transitions. Word has length 21 [2021-06-12 19:59:50,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:50,734 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 1305 transitions. [2021-06-12 19:59:50,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:50,734 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1305 transitions. [2021-06-12 19:59:50,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:50,735 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:50,735 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:50,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1525,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:50,935 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:50,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:50,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1822320685, now seen corresponding path program 339 times [2021-06-12 19:59:50,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:50,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922314] [2021-06-12 19:59:50,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:50,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:50,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922314] [2021-06-12 19:59:50,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:50,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44212988] [2021-06-12 19:59:50,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:51,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:59:51,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:51,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:51,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:51,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:51,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:51,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 19:59:51,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:51,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:51,059 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:51,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 19:59:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:51,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44212988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:51,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:51,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:59:51,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572360779] [2021-06-12 19:59:51,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:59:51,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:51,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:59:51,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:59:51,072 INFO L87 Difference]: Start difference. First operand 422 states and 1305 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:51,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:51,210 INFO L93 Difference]: Finished difference Result 663 states and 1992 transitions. [2021-06-12 19:59:51,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:51,210 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:51,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:51,211 INFO L225 Difference]: With dead ends: 663 [2021-06-12 19:59:51,211 INFO L226 Difference]: Without dead ends: 644 [2021-06-12 19:59:51,211 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:59:51,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-06-12 19:59:51,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 418. [2021-06-12 19:59:51,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 3.091127098321343) internal successors, (1289), 417 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:51,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1289 transitions. [2021-06-12 19:59:51,216 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1289 transitions. Word has length 21 [2021-06-12 19:59:51,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:51,216 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 1289 transitions. [2021-06-12 19:59:51,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:51,216 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1289 transitions. [2021-06-12 19:59:51,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:51,217 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:51,217 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:51,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1530 [2021-06-12 19:59:51,417 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:51,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:51,417 INFO L82 PathProgramCache]: Analyzing trace with hash -326475851, now seen corresponding path program 340 times [2021-06-12 19:59:51,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:51,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100705344] [2021-06-12 19:59:51,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:51,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:51,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:51,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100705344] [2021-06-12 19:59:51,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100705344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:51,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505513898] [2021-06-12 19:59:51,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:51,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:51,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:51,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:51,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:51,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:51,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:51,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 19:59:51,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:51,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:51,548 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:51,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 19:59:51,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:51,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505513898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:51,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:51,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:59:51,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915085953] [2021-06-12 19:59:51,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:59:51,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:51,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:59:51,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:59:51,565 INFO L87 Difference]: Start difference. First operand 418 states and 1289 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:51,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:51,691 INFO L93 Difference]: Finished difference Result 656 states and 1974 transitions. [2021-06-12 19:59:51,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:51,691 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:51,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:51,692 INFO L225 Difference]: With dead ends: 656 [2021-06-12 19:59:51,692 INFO L226 Difference]: Without dead ends: 637 [2021-06-12 19:59:51,692 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:59:51,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-06-12 19:59:51,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 414. [2021-06-12 19:59:51,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 3.0920096852300243) internal successors, (1277), 413 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:51,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1277 transitions. [2021-06-12 19:59:51,697 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1277 transitions. Word has length 21 [2021-06-12 19:59:51,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:51,697 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 1277 transitions. [2021-06-12 19:59:51,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:51,697 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1277 transitions. [2021-06-12 19:59:51,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:51,697 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:51,697 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:51,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1532 [2021-06-12 19:59:51,898 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:51,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:51,898 INFO L82 PathProgramCache]: Analyzing trace with hash 179870415, now seen corresponding path program 341 times [2021-06-12 19:59:51,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:51,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115690734] [2021-06-12 19:59:51,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:51,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:51,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:51,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115690734] [2021-06-12 19:59:51,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115690734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:51,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131247562] [2021-06-12 19:59:51,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:51,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:59:51,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:51,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:59:51,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:52,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:52,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:52,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:52,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:52,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 19:59:52,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:52,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:52,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:52,027 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:52,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:52,042 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:52,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:52,043 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:31 [2021-06-12 19:59:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:52,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131247562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:52,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:52,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:59:52,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896785321] [2021-06-12 19:59:52,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:59:52,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:52,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:59:52,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:59:52,110 INFO L87 Difference]: Start difference. First operand 414 states and 1277 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:52,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:52,347 INFO L93 Difference]: Finished difference Result 754 states and 2260 transitions. [2021-06-12 19:59:52,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:52,348 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:52,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:52,349 INFO L225 Difference]: With dead ends: 754 [2021-06-12 19:59:52,349 INFO L226 Difference]: Without dead ends: 735 [2021-06-12 19:59:52,349 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 202.6ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:52,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2021-06-12 19:59:52,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 415. [2021-06-12 19:59:52,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.111111111111111) internal successors, (1288), 414 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:52,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1288 transitions. [2021-06-12 19:59:52,354 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1288 transitions. Word has length 21 [2021-06-12 19:59:52,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:52,354 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1288 transitions. [2021-06-12 19:59:52,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:52,354 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1288 transitions. [2021-06-12 19:59:52,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:52,354 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:52,354 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:52,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1534,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:52,555 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:52,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:52,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1671601621, now seen corresponding path program 342 times [2021-06-12 19:59:52,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:52,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209074315] [2021-06-12 19:59:52,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:52,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:52,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:52,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209074315] [2021-06-12 19:59:52,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209074315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:52,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244093195] [2021-06-12 19:59:52,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:52,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:59:52,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:52,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:52,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:52,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:52,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:52,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:52,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:52,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:52,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:52,674 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 19:59:52,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:52,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:52,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:52,689 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:52,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:52,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 19:59:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:52,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244093195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:52,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:52,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:59:52,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259436574] [2021-06-12 19:59:52,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:59:52,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:52,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:59:52,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:59:52,698 INFO L87 Difference]: Start difference. First operand 415 states and 1288 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:52,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:52,879 INFO L93 Difference]: Finished difference Result 706 states and 2128 transitions. [2021-06-12 19:59:52,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:52,879 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:52,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:52,880 INFO L225 Difference]: With dead ends: 706 [2021-06-12 19:59:52,880 INFO L226 Difference]: Without dead ends: 684 [2021-06-12 19:59:52,880 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:59:52,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-06-12 19:59:52,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 430. [2021-06-12 19:59:52,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.1165501165501164) internal successors, (1337), 429 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:52,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1337 transitions. [2021-06-12 19:59:52,885 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1337 transitions. Word has length 21 [2021-06-12 19:59:52,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:52,885 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1337 transitions. [2021-06-12 19:59:52,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:52,885 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1337 transitions. [2021-06-12 19:59:52,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:52,885 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:52,885 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:53,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1539,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:53,086 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:53,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:53,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1247529711, now seen corresponding path program 343 times [2021-06-12 19:59:53,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:53,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110742724] [2021-06-12 19:59:53,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:53,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:53,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:53,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110742724] [2021-06-12 19:59:53,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110742724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:53,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688710024] [2021-06-12 19:59:53,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:53,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:53,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:53,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:53,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:53,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:53,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:53,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:53,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:20 [2021-06-12 19:59:53,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:53,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:53,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:59:53,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:53,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:53,242 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:53,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:53,242 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:5 [2021-06-12 19:59:53,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:53,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688710024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:53,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:53,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:59:53,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653119616] [2021-06-12 19:59:53,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:59:53,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:53,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:59:53,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:59:53,250 INFO L87 Difference]: Start difference. First operand 430 states and 1337 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:53,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:53,414 INFO L93 Difference]: Finished difference Result 719 states and 2166 transitions. [2021-06-12 19:59:53,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:53,414 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:53,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:53,415 INFO L225 Difference]: With dead ends: 719 [2021-06-12 19:59:53,415 INFO L226 Difference]: Without dead ends: 686 [2021-06-12 19:59:53,415 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:53,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-06-12 19:59:53,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 430. [2021-06-12 19:59:53,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.1095571095571097) internal successors, (1334), 429 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:53,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1334 transitions. [2021-06-12 19:59:53,420 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1334 transitions. Word has length 21 [2021-06-12 19:59:53,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:53,420 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1334 transitions. [2021-06-12 19:59:53,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:53,421 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1334 transitions. [2021-06-12 19:59:53,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:53,421 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:53,421 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:53,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1542,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:53,622 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:53,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:53,622 INFO L82 PathProgramCache]: Analyzing trace with hash 209151317, now seen corresponding path program 344 times [2021-06-12 19:59:53,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:53,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168862963] [2021-06-12 19:59:53,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:53,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:53,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:53,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:53,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168862963] [2021-06-12 19:59:53,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168862963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:53,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779582864] [2021-06-12 19:59:53,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:53,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:53,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:53,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:53,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:53,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:53,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:53,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:53,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:53,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:53,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:53,740 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 19:59:53,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:53,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:53,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:53,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:53,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:53,760 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:53,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:53,760 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-12 19:59:53,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:53,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779582864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:53,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:53,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:59:53,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460655803] [2021-06-12 19:59:53,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:59:53,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:53,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:59:53,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:59:53,784 INFO L87 Difference]: Start difference. First operand 430 states and 1334 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:53,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:53,968 INFO L93 Difference]: Finished difference Result 751 states and 2269 transitions. [2021-06-12 19:59:53,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:53,969 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:53,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:53,970 INFO L225 Difference]: With dead ends: 751 [2021-06-12 19:59:53,970 INFO L226 Difference]: Without dead ends: 722 [2021-06-12 19:59:53,976 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:53,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-06-12 19:59:53,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 430. [2021-06-12 19:59:53,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.1095571095571097) internal successors, (1334), 429 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:53,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1334 transitions. [2021-06-12 19:59:53,983 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1334 transitions. Word has length 21 [2021-06-12 19:59:53,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:53,983 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1334 transitions. [2021-06-12 19:59:53,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:53,983 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1334 transitions. [2021-06-12 19:59:53,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:53,984 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:53,984 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:54,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1548 [2021-06-12 19:59:54,197 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:54,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:54,197 INFO L82 PathProgramCache]: Analyzing trace with hash -885547601, now seen corresponding path program 345 times [2021-06-12 19:59:54,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:54,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866004434] [2021-06-12 19:59:54,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:54,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:54,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:54,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866004434] [2021-06-12 19:59:54,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866004434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:54,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069713290] [2021-06-12 19:59:54,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:54,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:59:54,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:54,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:54,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:54,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:54,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:54,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:54,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:54,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:20 [2021-06-12 19:59:54,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:54,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:54,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 19:59:54,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:54,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:54,325 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:54,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:54,325 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 19:59:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:54,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069713290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:54,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:54,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:59:54,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94504627] [2021-06-12 19:59:54,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:59:54,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:54,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:59:54,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:59:54,343 INFO L87 Difference]: Start difference. First operand 430 states and 1334 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:54,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:54,525 INFO L93 Difference]: Finished difference Result 714 states and 2150 transitions. [2021-06-12 19:59:54,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:54,525 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:54,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:54,526 INFO L225 Difference]: With dead ends: 714 [2021-06-12 19:59:54,526 INFO L226 Difference]: Without dead ends: 687 [2021-06-12 19:59:54,526 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:59:54,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-06-12 19:59:54,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 428. [2021-06-12 19:59:54,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.11943793911007) internal successors, (1332), 427 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:54,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1332 transitions. [2021-06-12 19:59:54,531 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1332 transitions. Word has length 21 [2021-06-12 19:59:54,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:54,531 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 1332 transitions. [2021-06-12 19:59:54,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:54,531 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1332 transitions. [2021-06-12 19:59:54,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:54,532 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:54,532 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:54,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1552 [2021-06-12 19:59:54,732 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:54,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:54,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1979031859, now seen corresponding path program 346 times [2021-06-12 19:59:54,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:54,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395605754] [2021-06-12 19:59:54,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:54,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:54,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395605754] [2021-06-12 19:59:54,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395605754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:54,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458674361] [2021-06-12 19:59:54,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:54,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:54,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:54,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:54,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:54,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:54,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:54,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:54,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:54,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-06-12 19:59:54,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 19:59:54,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:54,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 19:59:54,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:54,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:54,881 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:54,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:54,881 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-12 19:59:54,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:54,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458674361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:54,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:54,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 19:59:54,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998981510] [2021-06-12 19:59:54,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:59:54,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:54,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:59:54,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:59:54,905 INFO L87 Difference]: Start difference. First operand 428 states and 1332 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:55,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:55,094 INFO L93 Difference]: Finished difference Result 724 states and 2184 transitions. [2021-06-12 19:59:55,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:55,094 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:55,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:55,095 INFO L225 Difference]: With dead ends: 724 [2021-06-12 19:59:55,095 INFO L226 Difference]: Without dead ends: 688 [2021-06-12 19:59:55,095 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 129.7ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:55,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-06-12 19:59:55,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 429. [2021-06-12 19:59:55,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.1238317757009346) internal successors, (1337), 428 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:55,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1337 transitions. [2021-06-12 19:59:55,100 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1337 transitions. Word has length 21 [2021-06-12 19:59:55,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:55,100 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1337 transitions. [2021-06-12 19:59:55,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:55,100 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1337 transitions. [2021-06-12 19:59:55,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:55,101 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:55,101 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:55,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1556 [2021-06-12 19:59:55,301 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:55,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:55,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1221236519, now seen corresponding path program 347 times [2021-06-12 19:59:55,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:55,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700896222] [2021-06-12 19:59:55,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:55,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:55,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:55,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700896222] [2021-06-12 19:59:55,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700896222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:55,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162752446] [2021-06-12 19:59:55,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:55,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:59:55,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:55,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:55,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:55,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:55,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:55,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:55,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:55,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:55,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:55,421 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 19:59:55,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:55,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:55,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:55,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:55,452 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:55,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:55,458 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:55,458 INFO L518 ElimStorePlain]: Eliminatee v_prenex_55 vanished before elimination [2021-06-12 19:59:55,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:55,458 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:13 [2021-06-12 19:59:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:55,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162752446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:55,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:55,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:59:55,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621299263] [2021-06-12 19:59:55,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:59:55,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:55,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:59:55,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:59:55,481 INFO L87 Difference]: Start difference. First operand 429 states and 1337 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:55,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:55,663 INFO L93 Difference]: Finished difference Result 765 states and 2299 transitions. [2021-06-12 19:59:55,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:55,664 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:55,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:55,665 INFO L225 Difference]: With dead ends: 765 [2021-06-12 19:59:55,665 INFO L226 Difference]: Without dead ends: 738 [2021-06-12 19:59:55,665 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 126.7ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:55,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2021-06-12 19:59:55,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 448. [2021-06-12 19:59:55,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 3.1387024608501117) internal successors, (1403), 447 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:55,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1403 transitions. [2021-06-12 19:59:55,670 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1403 transitions. Word has length 21 [2021-06-12 19:59:55,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:55,670 INFO L482 AbstractCegarLoop]: Abstraction has 448 states and 1403 transitions. [2021-06-12 19:59:55,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:55,671 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1403 transitions. [2021-06-12 19:59:55,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:55,671 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:55,671 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:55,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1559,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:55,872 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:55,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:55,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1192977839, now seen corresponding path program 348 times [2021-06-12 19:59:55,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:55,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713239813] [2021-06-12 19:59:55,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:55,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:55,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:55,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713239813] [2021-06-12 19:59:55,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713239813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:55,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264839567] [2021-06-12 19:59:55,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:55,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:59:55,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:55,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:55,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:55,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:55,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:55,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:55,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:56,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:56,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:56,004 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 19:59:56,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:56,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:56,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:56,035 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:56,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:56,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 19:59:56,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:56,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264839567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:56,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:56,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 19:59:56,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655235713] [2021-06-12 19:59:56,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:59:56,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:56,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:59:56,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:59:56,045 INFO L87 Difference]: Start difference. First operand 448 states and 1403 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:56,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:56,229 INFO L93 Difference]: Finished difference Result 724 states and 2178 transitions. [2021-06-12 19:59:56,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:56,230 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:56,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:56,230 INFO L225 Difference]: With dead ends: 724 [2021-06-12 19:59:56,231 INFO L226 Difference]: Without dead ends: 703 [2021-06-12 19:59:56,231 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:56,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-06-12 19:59:56,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 426. [2021-06-12 19:59:56,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.1270588235294117) internal successors, (1329), 425 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:56,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1329 transitions. [2021-06-12 19:59:56,236 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1329 transitions. Word has length 21 [2021-06-12 19:59:56,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:56,236 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1329 transitions. [2021-06-12 19:59:56,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:56,236 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1329 transitions. [2021-06-12 19:59:56,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:56,237 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:56,237 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:56,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1565,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:56,437 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:56,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:56,437 INFO L82 PathProgramCache]: Analyzing trace with hash 832800499, now seen corresponding path program 349 times [2021-06-12 19:59:56,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:56,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790337239] [2021-06-12 19:59:56,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:56,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:56,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:56,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790337239] [2021-06-12 19:59:56,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790337239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:56,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792318562] [2021-06-12 19:59:56,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:56,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:56,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:56,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:56,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:56,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:56,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:56,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-06-12 19:59:56,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 19:59:56,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:56,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 19:59:56,564 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:56,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:56,569 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:56,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:56,570 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-12 19:59:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:56,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792318562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:56,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:56,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 19:59:56,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929521711] [2021-06-12 19:59:56,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:59:56,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:56,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:59:56,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:59:56,594 INFO L87 Difference]: Start difference. First operand 426 states and 1329 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:56,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:56,813 INFO L93 Difference]: Finished difference Result 846 states and 2548 transitions. [2021-06-12 19:59:56,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:56,813 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:56,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:56,814 INFO L225 Difference]: With dead ends: 846 [2021-06-12 19:59:56,814 INFO L226 Difference]: Without dead ends: 799 [2021-06-12 19:59:56,814 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:56,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-06-12 19:59:56,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 429. [2021-06-12 19:59:56,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.1401869158878504) internal successors, (1344), 428 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:56,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1344 transitions. [2021-06-12 19:59:56,820 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1344 transitions. Word has length 21 [2021-06-12 19:59:56,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:56,820 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1344 transitions. [2021-06-12 19:59:56,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:56,820 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1344 transitions. [2021-06-12 19:59:56,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:56,820 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:56,820 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:57,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1568 [2021-06-12 19:59:57,021 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:57,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:57,021 INFO L82 PathProgramCache]: Analyzing trace with hash -261898419, now seen corresponding path program 350 times [2021-06-12 19:59:57,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:57,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709058365] [2021-06-12 19:59:57,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:57,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:57,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709058365] [2021-06-12 19:59:57,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709058365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:57,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519658958] [2021-06-12 19:59:57,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:57,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:57,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:57,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:57,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:57,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:57,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:57,132 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:57,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:57,135 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-12 19:59:57,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:57,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:57,155 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:57,161 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:57,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:57,162 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:13 [2021-06-12 19:59:57,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:57,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519658958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:57,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:57,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 19:59:57,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154976027] [2021-06-12 19:59:57,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:59:57,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:57,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:59:57,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:59:57,190 INFO L87 Difference]: Start difference. First operand 429 states and 1344 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:57,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:57,422 INFO L93 Difference]: Finished difference Result 909 states and 2741 transitions. [2021-06-12 19:59:57,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:57,423 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:57,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:57,424 INFO L225 Difference]: With dead ends: 909 [2021-06-12 19:59:57,424 INFO L226 Difference]: Without dead ends: 882 [2021-06-12 19:59:57,424 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 158.5ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:57,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-06-12 19:59:57,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 460. [2021-06-12 19:59:57,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.161220043572985) internal successors, (1451), 459 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:57,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1451 transitions. [2021-06-12 19:59:57,430 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1451 transitions. Word has length 21 [2021-06-12 19:59:57,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:57,430 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1451 transitions. [2021-06-12 19:59:57,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:57,430 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1451 transitions. [2021-06-12 19:59:57,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:57,431 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:57,431 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:57,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1571,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:57,631 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:57,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:57,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1618854519, now seen corresponding path program 351 times [2021-06-12 19:59:57,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:57,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114357750] [2021-06-12 19:59:57,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:57,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:57,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114357750] [2021-06-12 19:59:57,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114357750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:57,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358669795] [2021-06-12 19:59:57,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:57,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:59:57,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:57,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:57,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:57,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:57,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:57,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:57,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:57,745 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-12 19:59:57,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:57,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:57,774 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:57,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 19:59:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:57,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358669795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:57,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:57,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 19:59:57,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753858450] [2021-06-12 19:59:57,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:59:57,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:57,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:59:57,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:59:57,785 INFO L87 Difference]: Start difference. First operand 460 states and 1451 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:57,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:57,965 INFO L93 Difference]: Finished difference Result 893 states and 2700 transitions. [2021-06-12 19:59:57,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:57,965 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:57,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:57,966 INFO L225 Difference]: With dead ends: 893 [2021-06-12 19:59:57,966 INFO L226 Difference]: Without dead ends: 872 [2021-06-12 19:59:57,966 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 118.9ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:57,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-06-12 19:59:57,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 456. [2021-06-12 19:59:57,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.1604395604395603) internal successors, (1438), 455 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:57,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1438 transitions. [2021-06-12 19:59:57,972 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1438 transitions. Word has length 21 [2021-06-12 19:59:57,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:57,972 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1438 transitions. [2021-06-12 19:59:57,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:57,972 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1438 transitions. [2021-06-12 19:59:57,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:57,973 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:57,973 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:58,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1578,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:58,173 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:58,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:58,173 INFO L82 PathProgramCache]: Analyzing trace with hash 2125200785, now seen corresponding path program 352 times [2021-06-12 19:59:58,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:58,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576444788] [2021-06-12 19:59:58,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:58,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:58,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576444788] [2021-06-12 19:59:58,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576444788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:58,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522044706] [2021-06-12 19:59:58,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:58,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:58,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:58,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:59:58,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:58,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:58,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:58,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:58,275 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:58,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:58,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:58,278 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-12 19:59:58,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:58,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:58,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:58,296 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:58,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:58,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 19:59:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:58,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522044706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:58,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:58,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:59:58,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604177050] [2021-06-12 19:59:58,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:59:58,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:58,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:59:58,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:59:58,306 INFO L87 Difference]: Start difference. First operand 456 states and 1438 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:58,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:58,466 INFO L93 Difference]: Finished difference Result 941 states and 2818 transitions. [2021-06-12 19:59:58,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:59:58,466 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:58,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:58,467 INFO L225 Difference]: With dead ends: 941 [2021-06-12 19:59:58,467 INFO L226 Difference]: Without dead ends: 920 [2021-06-12 19:59:58,467 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:58,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-12 19:59:58,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 440. [2021-06-12 19:59:58,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 3.143507972665148) internal successors, (1380), 439 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:58,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1380 transitions. [2021-06-12 19:59:58,473 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1380 transitions. Word has length 21 [2021-06-12 19:59:58,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:58,473 INFO L482 AbstractCegarLoop]: Abstraction has 440 states and 1380 transitions. [2021-06-12 19:59:58,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:58,473 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1380 transitions. [2021-06-12 19:59:58,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:58,473 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:58,474 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:58,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1581,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:58,674 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:58,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:58,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1380365547, now seen corresponding path program 353 times [2021-06-12 19:59:58,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:58,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949083676] [2021-06-12 19:59:58,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:58,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:58,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:58,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:58,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949083676] [2021-06-12 19:59:58,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949083676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:58,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121520100] [2021-06-12 19:59:58,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:58,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:59:58,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:58,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:59:58,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:58,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:58,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:58,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:58,838 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:58,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:59:58,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:58,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:58,843 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:58,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:58,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:58,869 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:101, output treesize:69 [2021-06-12 19:59:58,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 19:59:58,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:58,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:58,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:58,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:58,977 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:58,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:58,978 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:21 [2021-06-12 19:59:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:59,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121520100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:59,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:59,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:59,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635799960] [2021-06-12 19:59:59,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:59,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:59,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:59,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:59,022 INFO L87 Difference]: Start difference. First operand 440 states and 1380 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:59,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:59,695 INFO L93 Difference]: Finished difference Result 789 states and 2407 transitions. [2021-06-12 19:59:59,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:59:59,696 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:59:59,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:59,697 INFO L225 Difference]: With dead ends: 789 [2021-06-12 19:59:59,697 INFO L226 Difference]: Without dead ends: 751 [2021-06-12 19:59:59,697 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 641.6ms TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:59:59,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-06-12 19:59:59,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 452. [2021-06-12 19:59:59,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.1596452328159645) internal successors, (1425), 451 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:59,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1425 transitions. [2021-06-12 19:59:59,702 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1425 transitions. Word has length 21 [2021-06-12 19:59:59,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:59,702 INFO L482 AbstractCegarLoop]: Abstraction has 452 states and 1425 transitions. [2021-06-12 19:59:59,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:59,702 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1425 transitions. [2021-06-12 19:59:59,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:59:59,703 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:59,703 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:59,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 354 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1584 [2021-06-12 19:59:59,903 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:59,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:59,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1228209909, now seen corresponding path program 354 times [2021-06-12 19:59:59,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:59,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728786841] [2021-06-12 19:59:59,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:00,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:00,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:00,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728786841] [2021-06-12 20:00:00,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728786841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:00,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769162581] [2021-06-12 20:00:00,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:00,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:00:00,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:00,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:00,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:00,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:00,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:00,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:00,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:00,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:00,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:00,082 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:00:00,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:00,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:00,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:00,139 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:00:00,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:00,141 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:00,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:00,147 INFO L518 ElimStorePlain]: Eliminatee v_prenex_56 vanished before elimination [2021-06-12 20:00:00,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:00,148 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:13 [2021-06-12 20:00:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:00,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769162581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:00,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:00,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:00:00,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333837298] [2021-06-12 20:00:00,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:00:00,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:00,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:00:00,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:00,193 INFO L87 Difference]: Start difference. First operand 452 states and 1425 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:00,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:00,520 INFO L93 Difference]: Finished difference Result 816 states and 2492 transitions. [2021-06-12 20:00:00,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:00:00,520 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:00,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:00,521 INFO L225 Difference]: With dead ends: 816 [2021-06-12 20:00:00,521 INFO L226 Difference]: Without dead ends: 793 [2021-06-12 20:00:00,521 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 288.6ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:00:00,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-06-12 20:00:00,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 456. [2021-06-12 20:00:00,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.158241758241758) internal successors, (1437), 455 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:00,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1437 transitions. [2021-06-12 20:00:00,527 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1437 transitions. Word has length 21 [2021-06-12 20:00:00,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:00,527 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1437 transitions. [2021-06-12 20:00:00,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:00,527 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1437 transitions. [2021-06-12 20:00:00,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:00,528 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:00,528 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:00,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1593,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:00,737 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:00,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:00,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1068629005, now seen corresponding path program 355 times [2021-06-12 20:00:00,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:00,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146727404] [2021-06-12 20:00:00,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:00,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:00,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:00,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146727404] [2021-06-12 20:00:00,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146727404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:00,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798766182] [2021-06-12 20:00:00,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:00,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:00,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:00,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:00,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:00,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:00,903 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:00,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:00,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:00,912 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:00:00,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:00,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:00,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:00,955 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:00:00,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:00,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:00:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:00,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798766182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:00,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:00,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:00,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750161164] [2021-06-12 20:00:00,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:00,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:00,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:00,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:00,998 INFO L87 Difference]: Start difference. First operand 456 states and 1437 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:01,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:01,319 INFO L93 Difference]: Finished difference Result 733 states and 2254 transitions. [2021-06-12 20:00:01,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:00:01,320 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:01,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:01,321 INFO L225 Difference]: With dead ends: 733 [2021-06-12 20:00:01,321 INFO L226 Difference]: Without dead ends: 714 [2021-06-12 20:00:01,321 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 275.1ms TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:00:01,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-06-12 20:00:01,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 452. [2021-06-12 20:00:01,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.1507760532150777) internal successors, (1421), 451 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:01,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1421 transitions. [2021-06-12 20:00:01,326 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1421 transitions. Word has length 21 [2021-06-12 20:00:01,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:01,326 INFO L482 AbstractCegarLoop]: Abstraction has 452 states and 1421 transitions. [2021-06-12 20:00:01,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:01,326 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1421 transitions. [2021-06-12 20:00:01,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:01,327 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:01,327 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:01,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1602,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:01,529 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:01,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:01,530 INFO L82 PathProgramCache]: Analyzing trace with hash -2082051155, now seen corresponding path program 356 times [2021-06-12 20:00:01,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:01,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044837463] [2021-06-12 20:00:01,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:01,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:01,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044837463] [2021-06-12 20:00:01,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044837463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:01,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271132192] [2021-06-12 20:00:01,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:01,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:01,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:01,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:01,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:01,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:01,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:01,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:01,684 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:01,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:01,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:01,693 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:00:01,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:01,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:01,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:01,731 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:00:01,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:01,733 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:01,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:01,742 INFO L518 ElimStorePlain]: Eliminatee v_prenex_59 vanished before elimination [2021-06-12 20:00:01,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:01,742 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:19 [2021-06-12 20:00:01,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:01,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271132192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:01,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:01,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:00:01,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946816489] [2021-06-12 20:00:01,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:00:01,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:01,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:00:01,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:00:01,766 INFO L87 Difference]: Start difference. First operand 452 states and 1421 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:01,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:01,950 INFO L93 Difference]: Finished difference Result 702 states and 2145 transitions. [2021-06-12 20:00:01,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:01,950 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:01,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:01,951 INFO L225 Difference]: With dead ends: 702 [2021-06-12 20:00:01,951 INFO L226 Difference]: Without dead ends: 679 [2021-06-12 20:00:01,951 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 170.6ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:01,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-06-12 20:00:01,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 454. [2021-06-12 20:00:01,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 3.1589403973509933) internal successors, (1431), 453 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:01,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1431 transitions. [2021-06-12 20:00:01,957 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1431 transitions. Word has length 21 [2021-06-12 20:00:01,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:01,957 INFO L482 AbstractCegarLoop]: Abstraction has 454 states and 1431 transitions. [2021-06-12 20:00:01,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:01,957 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1431 transitions. [2021-06-12 20:00:01,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:01,957 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:01,957 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:02,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1606,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:02,158 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:02,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:02,158 INFO L82 PathProgramCache]: Analyzing trace with hash 504543133, now seen corresponding path program 357 times [2021-06-12 20:00:02,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:02,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413179663] [2021-06-12 20:00:02,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:02,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:02,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:02,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413179663] [2021-06-12 20:00:02,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413179663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:02,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805751343] [2021-06-12 20:00:02,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:02,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:00:02,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:02,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:02,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:02,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:02,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:02,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:02,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:02,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:00:02,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:02,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:02,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:02,462 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:00:02,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:02,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:00:02,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:02,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805751343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:02,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:02,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:02,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49600524] [2021-06-12 20:00:02,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:02,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:02,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:02,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:02,491 INFO L87 Difference]: Start difference. First operand 454 states and 1431 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:02,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:02,818 INFO L93 Difference]: Finished difference Result 725 states and 2231 transitions. [2021-06-12 20:00:02,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:00:02,818 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:02,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:02,819 INFO L225 Difference]: With dead ends: 725 [2021-06-12 20:00:02,819 INFO L226 Difference]: Without dead ends: 706 [2021-06-12 20:00:02,820 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 303.2ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:00:02,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-06-12 20:00:02,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 462. [2021-06-12 20:00:02,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.1648590021691976) internal successors, (1459), 461 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:02,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1459 transitions. [2021-06-12 20:00:02,825 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1459 transitions. Word has length 21 [2021-06-12 20:00:02,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:02,825 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1459 transitions. [2021-06-12 20:00:02,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:02,825 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1459 transitions. [2021-06-12 20:00:02,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:02,826 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:02,826 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:03,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1613,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:03,026 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:03,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:03,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1529093347, now seen corresponding path program 358 times [2021-06-12 20:00:03,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:03,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419389866] [2021-06-12 20:00:03,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:03,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:03,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:03,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419389866] [2021-06-12 20:00:03,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419389866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:03,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947687602] [2021-06-12 20:00:03,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:03,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:03,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:03,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:03,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:03,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:03,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:03,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:03,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:03,208 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:00:03,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:03,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:03,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:03,231 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:00:03,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:03,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:00:03,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:03,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947687602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:03,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:03,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:03,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312760055] [2021-06-12 20:00:03,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:03,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:03,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:03,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:03,275 INFO L87 Difference]: Start difference. First operand 462 states and 1459 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:03,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:03,571 INFO L93 Difference]: Finished difference Result 717 states and 2211 transitions. [2021-06-12 20:00:03,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:00:03,571 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:03,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:03,572 INFO L225 Difference]: With dead ends: 717 [2021-06-12 20:00:03,572 INFO L226 Difference]: Without dead ends: 698 [2021-06-12 20:00:03,573 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 271.6ms TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:00:03,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-06-12 20:00:03,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 458. [2021-06-12 20:00:03,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.1575492341356672) internal successors, (1443), 457 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:03,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1443 transitions. [2021-06-12 20:00:03,578 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1443 transitions. Word has length 21 [2021-06-12 20:00:03,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:03,578 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1443 transitions. [2021-06-12 20:00:03,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:03,578 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1443 transitions. [2021-06-12 20:00:03,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:03,578 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:03,578 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:03,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1616 [2021-06-12 20:00:03,779 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:03,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:03,779 INFO L82 PathProgramCache]: Analyzing trace with hash -910831179, now seen corresponding path program 359 times [2021-06-12 20:00:03,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:03,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528143224] [2021-06-12 20:00:03,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:03,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:03,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:03,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528143224] [2021-06-12 20:00:03,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528143224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:03,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607848748] [2021-06-12 20:00:03,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:03,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:00:03,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:03,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:00:03,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:03,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:03,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:03,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:03,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:03,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:00:03,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:03,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:03,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:03,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:03,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:03,972 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:00:03,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:03,972 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:31 [2021-06-12 20:00:04,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:04,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607848748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:04,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:04,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:00:04,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435476794] [2021-06-12 20:00:04,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:00:04,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:04,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:00:04,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:04,054 INFO L87 Difference]: Start difference. First operand 458 states and 1443 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:04,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:04,275 INFO L93 Difference]: Finished difference Result 635 states and 1962 transitions. [2021-06-12 20:00:04,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:00:04,275 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:04,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:04,276 INFO L225 Difference]: With dead ends: 635 [2021-06-12 20:00:04,276 INFO L226 Difference]: Without dead ends: 616 [2021-06-12 20:00:04,276 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 235.7ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:04,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-06-12 20:00:04,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 454. [2021-06-12 20:00:04,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 3.1589403973509933) internal successors, (1431), 453 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:04,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1431 transitions. [2021-06-12 20:00:04,282 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1431 transitions. Word has length 21 [2021-06-12 20:00:04,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:04,282 INFO L482 AbstractCegarLoop]: Abstraction has 454 states and 1431 transitions. [2021-06-12 20:00:04,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:04,282 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1431 transitions. [2021-06-12 20:00:04,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:04,282 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:04,282 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:04,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1619,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:04,483 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:04,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:04,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1233428683, now seen corresponding path program 360 times [2021-06-12 20:00:04,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:04,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761832890] [2021-06-12 20:00:04,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:04,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:04,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761832890] [2021-06-12 20:00:04,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761832890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:04,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320106178] [2021-06-12 20:00:04,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:04,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:00:04,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:04,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:04,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:04,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:04,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:04,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:04,638 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:04,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:04,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:04,647 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:00:04,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:04,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:04,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:04,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:04,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:04,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:04,695 INFO L518 ElimStorePlain]: Eliminatee v_prenex_60 vanished before elimination [2021-06-12 20:00:04,695 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:00:04,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:04,696 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:19 [2021-06-12 20:00:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:04,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320106178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:04,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:04,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:00:04,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772437104] [2021-06-12 20:00:04,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:00:04,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:04,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:00:04,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:00:04,719 INFO L87 Difference]: Start difference. First operand 454 states and 1431 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:04,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:04,910 INFO L93 Difference]: Finished difference Result 708 states and 2171 transitions. [2021-06-12 20:00:04,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:04,910 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:04,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:04,911 INFO L225 Difference]: With dead ends: 708 [2021-06-12 20:00:04,911 INFO L226 Difference]: Without dead ends: 685 [2021-06-12 20:00:04,911 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 159.0ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:04,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-06-12 20:00:04,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 460. [2021-06-12 20:00:04,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.1655773420479303) internal successors, (1453), 459 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:04,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1453 transitions. [2021-06-12 20:00:04,917 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1453 transitions. Word has length 21 [2021-06-12 20:00:04,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:04,917 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1453 transitions. [2021-06-12 20:00:04,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:04,917 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1453 transitions. [2021-06-12 20:00:04,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:04,917 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:04,917 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:05,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1625 [2021-06-12 20:00:05,118 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:05,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:05,118 INFO L82 PathProgramCache]: Analyzing trace with hash 816528963, now seen corresponding path program 361 times [2021-06-12 20:00:05,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:05,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998045877] [2021-06-12 20:00:05,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:05,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:05,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:05,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998045877] [2021-06-12 20:00:05,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998045877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:05,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491962477] [2021-06-12 20:00:05,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:05,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:05,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:05,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:05,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:05,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:05,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:05,269 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:05,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:05,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:05,278 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:00:05,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:05,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:05,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:05,317 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:00:05,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:05,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:00:05,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:05,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491962477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:05,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:05,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:00:05,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021452541] [2021-06-12 20:00:05,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:00:05,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:05,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:00:05,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:05,361 INFO L87 Difference]: Start difference. First operand 460 states and 1453 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:05,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:05,662 INFO L93 Difference]: Finished difference Result 719 states and 2211 transitions. [2021-06-12 20:00:05,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:00:05,662 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:05,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:05,663 INFO L225 Difference]: With dead ends: 719 [2021-06-12 20:00:05,663 INFO L226 Difference]: Without dead ends: 700 [2021-06-12 20:00:05,663 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 228.1ms TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:00:05,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-06-12 20:00:05,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 456. [2021-06-12 20:00:05,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.1626373626373625) internal successors, (1439), 455 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:05,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1439 transitions. [2021-06-12 20:00:05,669 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1439 transitions. Word has length 21 [2021-06-12 20:00:05,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:05,669 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1439 transitions. [2021-06-12 20:00:05,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:05,669 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1439 transitions. [2021-06-12 20:00:05,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:05,669 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:05,670 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:05,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1632,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:05,870 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:05,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:05,870 INFO L82 PathProgramCache]: Analyzing trace with hash -702328017, now seen corresponding path program 362 times [2021-06-12 20:00:05,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:05,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790520056] [2021-06-12 20:00:05,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:05,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:05,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:05,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790520056] [2021-06-12 20:00:05,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790520056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:05,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327801563] [2021-06-12 20:00:05,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:05,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:05,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:05,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:05,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:06,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:06,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:06,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:06,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:06,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:00:06,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:06,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:06,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:06,064 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:00:06,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:06,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:00:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:06,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327801563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:06,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:06,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:00:06,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808124942] [2021-06-12 20:00:06,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:00:06,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:06,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:00:06,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:00:06,090 INFO L87 Difference]: Start difference. First operand 456 states and 1439 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:06,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:06,395 INFO L93 Difference]: Finished difference Result 761 states and 2336 transitions. [2021-06-12 20:00:06,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:00:06,395 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:06,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:06,396 INFO L225 Difference]: With dead ends: 761 [2021-06-12 20:00:06,396 INFO L226 Difference]: Without dead ends: 742 [2021-06-12 20:00:06,396 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 244.5ms TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:00:06,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-06-12 20:00:06,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 465. [2021-06-12 20:00:06,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.1551724137931036) internal successors, (1464), 464 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:06,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1464 transitions. [2021-06-12 20:00:06,402 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1464 transitions. Word has length 21 [2021-06-12 20:00:06,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:06,402 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1464 transitions. [2021-06-12 20:00:06,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:06,402 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1464 transitions. [2021-06-12 20:00:06,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:06,403 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:06,403 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:06,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1636,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:06,603 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:06,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:06,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1559002799, now seen corresponding path program 363 times [2021-06-12 20:00:06,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:06,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660399214] [2021-06-12 20:00:06,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:06,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:06,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:06,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660399214] [2021-06-12 20:00:06,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660399214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:06,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306348309] [2021-06-12 20:00:06,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:06,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:00:06,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:06,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:06,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:06,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:06,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:06,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:06,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:06,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:00:06,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:06,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:06,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:06,780 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:00:06,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:06,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:00:06,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:06,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306348309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:06,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:06,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:00:06,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748877422] [2021-06-12 20:00:06,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:00:06,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:06,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:00:06,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:00:06,793 INFO L87 Difference]: Start difference. First operand 465 states and 1464 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:06,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:06,930 INFO L93 Difference]: Finished difference Result 652 states and 2015 transitions. [2021-06-12 20:00:06,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:06,930 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:06,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:06,931 INFO L225 Difference]: With dead ends: 652 [2021-06-12 20:00:06,931 INFO L226 Difference]: Without dead ends: 633 [2021-06-12 20:00:06,931 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 114.5ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:00:06,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-12 20:00:06,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 461. [2021-06-12 20:00:06,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.1478260869565218) internal successors, (1448), 460 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:06,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1448 transitions. [2021-06-12 20:00:06,936 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1448 transitions. Word has length 21 [2021-06-12 20:00:06,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:06,936 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1448 transitions. [2021-06-12 20:00:06,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:06,936 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1448 transitions. [2021-06-12 20:00:06,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:06,937 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:06,937 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:07,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1639 [2021-06-12 20:00:07,137 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:07,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:07,137 INFO L82 PathProgramCache]: Analyzing trace with hash -2117702329, now seen corresponding path program 364 times [2021-06-12 20:00:07,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:07,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446308829] [2021-06-12 20:00:07,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:07,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:07,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:07,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446308829] [2021-06-12 20:00:07,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446308829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:07,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456553870] [2021-06-12 20:00:07,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:07,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:07,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:07,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:07,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:07,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:07,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:07,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:07,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:07,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:00:07,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:07,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:07,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:07,294 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:00:07,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:07,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:00:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:07,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456553870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:07,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:07,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:00:07,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386484345] [2021-06-12 20:00:07,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:00:07,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:07,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:00:07,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:00:07,307 INFO L87 Difference]: Start difference. First operand 461 states and 1448 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:07,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:07,440 INFO L93 Difference]: Finished difference Result 650 states and 1995 transitions. [2021-06-12 20:00:07,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:07,440 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:07,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:07,441 INFO L225 Difference]: With dead ends: 650 [2021-06-12 20:00:07,441 INFO L226 Difference]: Without dead ends: 631 [2021-06-12 20:00:07,441 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:07,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-12 20:00:07,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 445. [2021-06-12 20:00:07,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 3.135135135135135) internal successors, (1392), 444 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:07,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1392 transitions. [2021-06-12 20:00:07,446 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1392 transitions. Word has length 21 [2021-06-12 20:00:07,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:07,446 INFO L482 AbstractCegarLoop]: Abstraction has 445 states and 1392 transitions. [2021-06-12 20:00:07,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:07,446 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1392 transitions. [2021-06-12 20:00:07,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:07,447 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:07,447 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:07,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1642,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:07,647 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:07,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:07,648 INFO L82 PathProgramCache]: Analyzing trace with hash -440489425, now seen corresponding path program 365 times [2021-06-12 20:00:07,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:07,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220963106] [2021-06-12 20:00:07,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:07,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:07,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:07,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220963106] [2021-06-12 20:00:07,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220963106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:07,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023029783] [2021-06-12 20:00:07,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:07,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:00:07,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:07,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:00:07,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:07,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:07,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:07,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:07,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:07,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 20:00:07,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:07,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:07,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:07,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:07,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:07,799 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:00:07,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:07,799 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:31 [2021-06-12 20:00:07,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:07,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023029783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:07,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:07,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:00:07,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520757260] [2021-06-12 20:00:07,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:00:07,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:07,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:00:07,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:00:07,864 INFO L87 Difference]: Start difference. First operand 445 states and 1392 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:08,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:08,119 INFO L93 Difference]: Finished difference Result 766 states and 2338 transitions. [2021-06-12 20:00:08,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:00:08,119 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:08,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:08,120 INFO L225 Difference]: With dead ends: 766 [2021-06-12 20:00:08,120 INFO L226 Difference]: Without dead ends: 747 [2021-06-12 20:00:08,120 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 218.9ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:08,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2021-06-12 20:00:08,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 438. [2021-06-12 20:00:08,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.137299771167048) internal successors, (1371), 437 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:08,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1371 transitions. [2021-06-12 20:00:08,126 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1371 transitions. Word has length 21 [2021-06-12 20:00:08,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:08,126 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1371 transitions. [2021-06-12 20:00:08,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:08,126 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1371 transitions. [2021-06-12 20:00:08,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:08,126 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:08,126 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:08,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1645 [2021-06-12 20:00:08,327 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:08,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:08,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1317174607, now seen corresponding path program 366 times [2021-06-12 20:00:08,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:08,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642119139] [2021-06-12 20:00:08,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:08,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:08,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:08,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:08,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642119139] [2021-06-12 20:00:08,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642119139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:08,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226598204] [2021-06-12 20:00:08,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:08,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:00:08,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:08,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:08,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:08,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:08,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:08,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:08,462 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:08,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:08,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:08,469 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:00:08,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:08,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:08,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:08,496 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:08,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:08,505 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:00:08,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:08,505 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:19 [2021-06-12 20:00:08,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:08,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226598204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:08,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:08,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:00:08,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24749795] [2021-06-12 20:00:08,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:00:08,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:08,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:00:08,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:00:08,529 INFO L87 Difference]: Start difference. First operand 438 states and 1371 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:08,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:08,731 INFO L93 Difference]: Finished difference Result 825 states and 2508 transitions. [2021-06-12 20:00:08,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:08,732 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:08,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:08,733 INFO L225 Difference]: With dead ends: 825 [2021-06-12 20:00:08,733 INFO L226 Difference]: Without dead ends: 802 [2021-06-12 20:00:08,733 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 156.9ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:08,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-06-12 20:00:08,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 461. [2021-06-12 20:00:08,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.1478260869565218) internal successors, (1448), 460 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:08,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1448 transitions. [2021-06-12 20:00:08,738 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1448 transitions. Word has length 21 [2021-06-12 20:00:08,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:08,738 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1448 transitions. [2021-06-12 20:00:08,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:08,738 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1448 transitions. [2021-06-12 20:00:08,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:08,739 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:08,739 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:08,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1650 [2021-06-12 20:00:08,939 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:08,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:08,940 INFO L82 PathProgramCache]: Analyzing trace with hash -927835043, now seen corresponding path program 367 times [2021-06-12 20:00:08,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:08,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598153830] [2021-06-12 20:00:08,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:09,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:09,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:09,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598153830] [2021-06-12 20:00:09,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598153830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:09,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320236384] [2021-06-12 20:00:09,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:09,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:09,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:09,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:09,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:09,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:09,100 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:09,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:09,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:09,107 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:00:09,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:09,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:09,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:09,155 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:00:09,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:09,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:00:09,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:09,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320236384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:09,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:09,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:00:09,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602134004] [2021-06-12 20:00:09,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:00:09,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:09,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:00:09,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:00:09,175 INFO L87 Difference]: Start difference. First operand 461 states and 1448 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:09,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:09,413 INFO L93 Difference]: Finished difference Result 785 states and 2397 transitions. [2021-06-12 20:00:09,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:09,414 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:09,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:09,414 INFO L225 Difference]: With dead ends: 785 [2021-06-12 20:00:09,415 INFO L226 Difference]: Without dead ends: 766 [2021-06-12 20:00:09,415 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 172.5ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:09,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-06-12 20:00:09,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 458. [2021-06-12 20:00:09,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.1466083150984683) internal successors, (1438), 457 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:09,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1438 transitions. [2021-06-12 20:00:09,420 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1438 transitions. Word has length 21 [2021-06-12 20:00:09,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:09,420 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1438 transitions. [2021-06-12 20:00:09,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:09,420 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1438 transitions. [2021-06-12 20:00:09,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:09,421 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:09,421 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:09,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1656 [2021-06-12 20:00:09,621 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:09,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:09,622 INFO L82 PathProgramCache]: Analyzing trace with hash 557254283, now seen corresponding path program 368 times [2021-06-12 20:00:09,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:09,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180792372] [2021-06-12 20:00:09,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:09,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:09,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:09,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180792372] [2021-06-12 20:00:09,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180792372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:09,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843820328] [2021-06-12 20:00:09,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:09,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:09,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:09,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:09,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:09,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:09,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:09,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:09,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:09,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:09,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:09,789 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:00:09,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:09,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:09,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:09,814 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:00:09,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:09,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:00:09,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:09,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843820328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:09,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:09,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:00:09,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343628781] [2021-06-12 20:00:09,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:00:09,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:09,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:00:09,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:09,856 INFO L87 Difference]: Start difference. First operand 458 states and 1438 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:10,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:10,235 INFO L93 Difference]: Finished difference Result 938 states and 2845 transitions. [2021-06-12 20:00:10,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:00:10,235 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:10,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:10,237 INFO L225 Difference]: With dead ends: 938 [2021-06-12 20:00:10,237 INFO L226 Difference]: Without dead ends: 919 [2021-06-12 20:00:10,237 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 277.6ms TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:00:10,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2021-06-12 20:00:10,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 440. [2021-06-12 20:00:10,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 3.120728929384966) internal successors, (1370), 439 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:10,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1370 transitions. [2021-06-12 20:00:10,243 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1370 transitions. Word has length 21 [2021-06-12 20:00:10,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:10,243 INFO L482 AbstractCegarLoop]: Abstraction has 440 states and 1370 transitions. [2021-06-12 20:00:10,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:10,243 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1370 transitions. [2021-06-12 20:00:10,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:10,244 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:10,244 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:10,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 369 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1660 [2021-06-12 20:00:10,445 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:10,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:10,445 INFO L82 PathProgramCache]: Analyzing trace with hash 610742443, now seen corresponding path program 369 times [2021-06-12 20:00:10,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:10,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636245425] [2021-06-12 20:00:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:10,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:10,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:10,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636245425] [2021-06-12 20:00:10,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636245425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:10,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338013843] [2021-06-12 20:00:10,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:10,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:00:10,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:10,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:10,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:10,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:10,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:10,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:10,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:10,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 20:00:10,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:10,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:10,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:10,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:00:10,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:10,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:10,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:10,726 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:9 [2021-06-12 20:00:10,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:10,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338013843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:10,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:10,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:00:10,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772121037] [2021-06-12 20:00:10,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:00:10,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:10,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:00:10,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:00:10,735 INFO L87 Difference]: Start difference. First operand 440 states and 1370 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:10,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:10,858 INFO L93 Difference]: Finished difference Result 520 states and 1601 transitions. [2021-06-12 20:00:10,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:10,858 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:10,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:10,859 INFO L225 Difference]: With dead ends: 520 [2021-06-12 20:00:10,859 INFO L226 Difference]: Without dead ends: 498 [2021-06-12 20:00:10,859 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 157.8ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:00:10,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-12 20:00:10,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 450. [2021-06-12 20:00:10,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 3.1269487750556793) internal successors, (1404), 449 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:10,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1404 transitions. [2021-06-12 20:00:10,864 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1404 transitions. Word has length 21 [2021-06-12 20:00:10,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:10,864 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 1404 transitions. [2021-06-12 20:00:10,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:10,864 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1404 transitions. [2021-06-12 20:00:10,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:10,865 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:10,865 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:11,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1664 [2021-06-12 20:00:11,065 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:11,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:11,066 INFO L82 PathProgramCache]: Analyzing trace with hash 108951107, now seen corresponding path program 370 times [2021-06-12 20:00:11,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:11,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003163111] [2021-06-12 20:00:11,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:11,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:11,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003163111] [2021-06-12 20:00:11,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003163111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:11,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218987328] [2021-06-12 20:00:11,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:11,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:11,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:11,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:11,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:11,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:11,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:11,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:11,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:11,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:11,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 20:00:11,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:11,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:11,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:11,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:11,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:11,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:00:11,297 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:11,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:11,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:11,306 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 20:00:11,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:11,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218987328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:11,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:11,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:00:11,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793835728] [2021-06-12 20:00:11,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:00:11,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:11,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:00:11,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:11,320 INFO L87 Difference]: Start difference. First operand 450 states and 1404 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:11,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:11,444 INFO L93 Difference]: Finished difference Result 529 states and 1625 transitions. [2021-06-12 20:00:11,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:11,445 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:11,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:11,445 INFO L225 Difference]: With dead ends: 529 [2021-06-12 20:00:11,445 INFO L226 Difference]: Without dead ends: 507 [2021-06-12 20:00:11,446 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 137.6ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:11,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-06-12 20:00:11,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 447. [2021-06-12 20:00:11,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 3.1210762331838566) internal successors, (1392), 446 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:11,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1392 transitions. [2021-06-12 20:00:11,450 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1392 transitions. Word has length 21 [2021-06-12 20:00:11,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:11,450 INFO L482 AbstractCegarLoop]: Abstraction has 447 states and 1392 transitions. [2021-06-12 20:00:11,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:11,450 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1392 transitions. [2021-06-12 20:00:11,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:11,451 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:11,451 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:11,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1670,371 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:11,651 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:11,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:11,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1997833013, now seen corresponding path program 371 times [2021-06-12 20:00:11,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:11,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677375202] [2021-06-12 20:00:11,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:11,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:11,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:11,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:11,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677375202] [2021-06-12 20:00:11,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677375202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:11,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124244967] [2021-06-12 20:00:11,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:11,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:00:11,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:11,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:11,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:11,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:11,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:11,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:11,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:11,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:11,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 20:00:11,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:11,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:11,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:11,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:11,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:11,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:00:11,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:11,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:11,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:11,893 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 20:00:11,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:11,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124244967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:11,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:11,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:00:11,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151260192] [2021-06-12 20:00:11,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:00:11,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:11,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:00:11,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:11,907 INFO L87 Difference]: Start difference. First operand 447 states and 1392 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:12,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:12,033 INFO L93 Difference]: Finished difference Result 517 states and 1592 transitions. [2021-06-12 20:00:12,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:12,033 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:12,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:12,034 INFO L225 Difference]: With dead ends: 517 [2021-06-12 20:00:12,034 INFO L226 Difference]: Without dead ends: 495 [2021-06-12 20:00:12,034 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 140.9ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:12,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-12 20:00:12,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 444. [2021-06-12 20:00:12,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 3.1218961625282167) internal successors, (1383), 443 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:12,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1383 transitions. [2021-06-12 20:00:12,039 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1383 transitions. Word has length 21 [2021-06-12 20:00:12,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:12,039 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 1383 transitions. [2021-06-12 20:00:12,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:12,039 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1383 transitions. [2021-06-12 20:00:12,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:12,040 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:12,040 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:12,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1672 [2021-06-12 20:00:12,242 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:12,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:12,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1479046379, now seen corresponding path program 372 times [2021-06-12 20:00:12,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:12,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356493648] [2021-06-12 20:00:12,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:12,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:12,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:12,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:12,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356493648] [2021-06-12 20:00:12,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356493648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:12,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118061293] [2021-06-12 20:00:12,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:12,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:00:12,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:12,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:12,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:12,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:12,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:12,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:12,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:12,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:12,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:12,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:12,492 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:31 [2021-06-12 20:00:12,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:12,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:12,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:12,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:12,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:12,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:12,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:12,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:12,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:12,580 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:7 [2021-06-12 20:00:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:12,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118061293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:12,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:12,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:12,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108661083] [2021-06-12 20:00:12,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:12,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:12,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:12,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:12,609 INFO L87 Difference]: Start difference. First operand 444 states and 1383 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:12,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:12,895 INFO L93 Difference]: Finished difference Result 632 states and 1941 transitions. [2021-06-12 20:00:12,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:00:12,896 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:12,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:12,898 INFO L225 Difference]: With dead ends: 632 [2021-06-12 20:00:12,898 INFO L226 Difference]: Without dead ends: 613 [2021-06-12 20:00:12,899 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 288.6ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:00:12,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-12 20:00:12,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 448. [2021-06-12 20:00:12,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 3.120805369127517) internal successors, (1395), 447 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:12,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1395 transitions. [2021-06-12 20:00:12,906 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1395 transitions. Word has length 21 [2021-06-12 20:00:12,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:12,906 INFO L482 AbstractCegarLoop]: Abstraction has 448 states and 1395 transitions. [2021-06-12 20:00:12,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:12,906 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1395 transitions. [2021-06-12 20:00:12,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:12,907 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:12,907 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:13,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1674 [2021-06-12 20:00:13,107 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:13,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:13,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1701254991, now seen corresponding path program 373 times [2021-06-12 20:00:13,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:13,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748464304] [2021-06-12 20:00:13,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:13,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:13,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:13,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748464304] [2021-06-12 20:00:13,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748464304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:13,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146759951] [2021-06-12 20:00:13,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:13,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:13,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:13,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:13,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:13,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:13,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:13,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:13,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:13,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 20:00:13,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:13,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:13,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:13,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:13,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:00:13,398 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:13,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:13,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:13,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:13,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:13,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:13,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:13,424 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:51, output treesize:5 [2021-06-12 20:00:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:13,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146759951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:13,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:13,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:13,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436432231] [2021-06-12 20:00:13,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:13,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:13,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:13,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:13,452 INFO L87 Difference]: Start difference. First operand 448 states and 1395 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:13,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:13,829 INFO L93 Difference]: Finished difference Result 784 states and 2382 transitions. [2021-06-12 20:00:13,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:00:13,830 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:13,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:13,831 INFO L225 Difference]: With dead ends: 784 [2021-06-12 20:00:13,831 INFO L226 Difference]: Without dead ends: 724 [2021-06-12 20:00:13,831 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 325.9ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:00:13,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-06-12 20:00:13,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 448. [2021-06-12 20:00:13,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 3.116331096196868) internal successors, (1393), 447 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:13,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1393 transitions. [2021-06-12 20:00:13,837 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1393 transitions. Word has length 21 [2021-06-12 20:00:13,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:13,837 INFO L482 AbstractCegarLoop]: Abstraction has 448 states and 1393 transitions. [2021-06-12 20:00:13,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:13,837 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1393 transitions. [2021-06-12 20:00:13,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:13,838 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:13,838 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:14,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1680,374 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:14,038 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:14,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:14,039 INFO L82 PathProgramCache]: Analyzing trace with hash 207345461, now seen corresponding path program 374 times [2021-06-12 20:00:14,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:14,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165088968] [2021-06-12 20:00:14,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:14,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:14,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:14,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165088968] [2021-06-12 20:00:14,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165088968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:14,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958111943] [2021-06-12 20:00:14,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:14,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:14,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:14,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:14,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:14,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:14,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:14,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:14,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:14,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:14,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:14,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:14,262 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:31 [2021-06-12 20:00:14,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:14,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:14,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:14,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:14,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:14,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:14,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:14,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:14,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:14,326 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:14,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:14,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:14,341 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:13 [2021-06-12 20:00:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:14,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958111943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:14,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:14,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:14,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850173037] [2021-06-12 20:00:14,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:14,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:14,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:14,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:14,389 INFO L87 Difference]: Start difference. First operand 448 states and 1393 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:14,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:14,717 INFO L93 Difference]: Finished difference Result 700 states and 2152 transitions. [2021-06-12 20:00:14,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:00:14,717 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:14,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:14,718 INFO L225 Difference]: With dead ends: 700 [2021-06-12 20:00:14,718 INFO L226 Difference]: Without dead ends: 677 [2021-06-12 20:00:14,718 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 268.9ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:00:14,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-06-12 20:00:14,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 446. [2021-06-12 20:00:14,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 3.1191011235955055) internal successors, (1388), 445 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:14,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1388 transitions. [2021-06-12 20:00:14,723 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1388 transitions. Word has length 21 [2021-06-12 20:00:14,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:14,724 INFO L482 AbstractCegarLoop]: Abstraction has 446 states and 1388 transitions. [2021-06-12 20:00:14,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:14,724 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1388 transitions. [2021-06-12 20:00:14,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:14,724 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:14,724 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:14,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1690,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:14,925 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:14,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:14,925 INFO L82 PathProgramCache]: Analyzing trace with hash -678452819, now seen corresponding path program 375 times [2021-06-12 20:00:14,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:14,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989873937] [2021-06-12 20:00:14,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:15,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:15,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:15,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989873937] [2021-06-12 20:00:15,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989873937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:15,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869099185] [2021-06-12 20:00:15,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:15,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:00:15,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:15,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:00:15,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:15,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:15,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:15,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 20:00:15,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:15,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:15,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:15,178 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:15,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:15,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:15,201 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:71 [2021-06-12 20:00:15,283 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-06-12 20:00:15,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:15,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:15,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-12 20:00:15,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:15,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:00:15,292 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:15,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 20:00:15,296 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:15,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:15,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:15,300 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:15,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:15,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:15,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:15,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:15,347 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:15,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:15,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-12 20:00:15,352 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:15,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:15,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:00:15,391 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:145, output treesize:34 [2021-06-12 20:00:15,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:15,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869099185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:15,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:15,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:15,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671375900] [2021-06-12 20:00:15,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:15,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:15,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:15,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:15,485 INFO L87 Difference]: Start difference. First operand 446 states and 1388 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:15,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:15,818 INFO L93 Difference]: Finished difference Result 652 states and 2010 transitions. [2021-06-12 20:00:15,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:00:15,818 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:15,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:15,819 INFO L225 Difference]: With dead ends: 652 [2021-06-12 20:00:15,819 INFO L226 Difference]: Without dead ends: 625 [2021-06-12 20:00:15,819 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 387.3ms TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:00:15,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-06-12 20:00:15,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 446. [2021-06-12 20:00:15,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 3.1191011235955055) internal successors, (1388), 445 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:15,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1388 transitions. [2021-06-12 20:00:15,824 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1388 transitions. Word has length 21 [2021-06-12 20:00:15,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:15,825 INFO L482 AbstractCegarLoop]: Abstraction has 446 states and 1388 transitions. [2021-06-12 20:00:15,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:15,825 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1388 transitions. [2021-06-12 20:00:15,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:15,825 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:15,825 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:16,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1698 [2021-06-12 20:00:16,026 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:16,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:16,026 INFO L82 PathProgramCache]: Analyzing trace with hash -962715503, now seen corresponding path program 376 times [2021-06-12 20:00:16,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:16,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090077468] [2021-06-12 20:00:16,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:16,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:16,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:16,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090077468] [2021-06-12 20:00:16,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090077468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:16,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643829514] [2021-06-12 20:00:16,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:16,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:16,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:16,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:16,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:16,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:16,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:16,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:16,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:16,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:16,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:16,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:16,281 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:31 [2021-06-12 20:00:16,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:16,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:16,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:16,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:16,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:16,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:16,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:16,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:16,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:16,360 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:16,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:16,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:16,379 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:13 [2021-06-12 20:00:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:16,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643829514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:16,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:16,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:16,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264537822] [2021-06-12 20:00:16,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:16,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:16,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:16,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:16,431 INFO L87 Difference]: Start difference. First operand 446 states and 1388 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:16,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:16,846 INFO L93 Difference]: Finished difference Result 725 states and 2220 transitions. [2021-06-12 20:00:16,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:00:16,846 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:16,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:16,847 INFO L225 Difference]: With dead ends: 725 [2021-06-12 20:00:16,847 INFO L226 Difference]: Without dead ends: 698 [2021-06-12 20:00:16,847 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 383.7ms TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:00:16,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-06-12 20:00:16,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 458. [2021-06-12 20:00:16,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.111597374179431) internal successors, (1422), 457 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:16,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1422 transitions. [2021-06-12 20:00:16,853 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1422 transitions. Word has length 21 [2021-06-12 20:00:16,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:16,853 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1422 transitions. [2021-06-12 20:00:16,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:16,853 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1422 transitions. [2021-06-12 20:00:16,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:16,854 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:16,854 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:17,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1712,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:17,054 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:17,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:17,054 INFO L82 PathProgramCache]: Analyzing trace with hash 723676337, now seen corresponding path program 377 times [2021-06-12 20:00:17,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:17,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321491576] [2021-06-12 20:00:17,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:17,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:17,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:17,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:17,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321491576] [2021-06-12 20:00:17,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321491576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:17,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338325176] [2021-06-12 20:00:17,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:17,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:00:17,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:17,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:17,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:17,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:17,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:17,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:17,257 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:17,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:17,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:17,269 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:31 [2021-06-12 20:00:17,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:17,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:17,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:17,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:17,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:17,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:17,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:17,345 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:7 [2021-06-12 20:00:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:17,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338325176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:17,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:17,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:17,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810734908] [2021-06-12 20:00:17,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:17,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:17,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:17,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:17,376 INFO L87 Difference]: Start difference. First operand 458 states and 1422 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:17,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:17,767 INFO L93 Difference]: Finished difference Result 628 states and 1922 transitions. [2021-06-12 20:00:17,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:00:17,767 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:17,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:17,768 INFO L225 Difference]: With dead ends: 628 [2021-06-12 20:00:17,768 INFO L226 Difference]: Without dead ends: 607 [2021-06-12 20:00:17,768 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 325.7ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:00:17,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-12 20:00:17,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 444. [2021-06-12 20:00:17,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 3.1218961625282167) internal successors, (1383), 443 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:17,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1383 transitions. [2021-06-12 20:00:17,773 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1383 transitions. Word has length 21 [2021-06-12 20:00:17,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:17,773 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 1383 transitions. [2021-06-12 20:00:17,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:17,773 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1383 transitions. [2021-06-12 20:00:17,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:17,774 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:17,774 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:17,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1724,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:17,974 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:17,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:17,975 INFO L82 PathProgramCache]: Analyzing trace with hash -265079971, now seen corresponding path program 378 times [2021-06-12 20:00:17,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:17,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768981409] [2021-06-12 20:00:17,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:18,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:18,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768981409] [2021-06-12 20:00:18,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768981409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:18,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882820594] [2021-06-12 20:00:18,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:18,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:00:18,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:18,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:18,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:18,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:18,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:18,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:18,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:18,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:18,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:18,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:18,202 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:00:18,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:18,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:18,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:18,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:18,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:18,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:00:18,307 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:18,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:18,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:18,314 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:9 [2021-06-12 20:00:18,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:18,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882820594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:18,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:18,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:00:18,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186325668] [2021-06-12 20:00:18,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:00:18,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:18,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:00:18,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:00:18,323 INFO L87 Difference]: Start difference. First operand 444 states and 1383 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:18,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:18,467 INFO L93 Difference]: Finished difference Result 568 states and 1748 transitions. [2021-06-12 20:00:18,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:18,467 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:18,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:18,468 INFO L225 Difference]: With dead ends: 568 [2021-06-12 20:00:18,468 INFO L226 Difference]: Without dead ends: 546 [2021-06-12 20:00:18,468 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 190.2ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:00:18,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-12 20:00:18,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 451. [2021-06-12 20:00:18,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 3.1355555555555554) internal successors, (1411), 450 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:18,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1411 transitions. [2021-06-12 20:00:18,473 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1411 transitions. Word has length 21 [2021-06-12 20:00:18,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:18,473 INFO L482 AbstractCegarLoop]: Abstraction has 451 states and 1411 transitions. [2021-06-12 20:00:18,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:18,473 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1411 transitions. [2021-06-12 20:00:18,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:18,474 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:18,474 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:18,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1731,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:18,674 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:18,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:18,674 INFO L82 PathProgramCache]: Analyzing trace with hash -766871307, now seen corresponding path program 379 times [2021-06-12 20:00:18,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:18,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742226756] [2021-06-12 20:00:18,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:18,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:18,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:18,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742226756] [2021-06-12 20:00:18,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742226756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:18,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220081568] [2021-06-12 20:00:18,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:18,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:18,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:18,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:18,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:18,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:18,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:18,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:18,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:18,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:18,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:18,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:18,879 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:00:18,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:18,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:18,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:18,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:18,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:18,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:00:18,960 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:18,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:18,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:18,969 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 20:00:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:18,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220081568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:18,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:18,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:00:18,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578104852] [2021-06-12 20:00:18,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:00:18,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:18,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:00:18,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:18,983 INFO L87 Difference]: Start difference. First operand 451 states and 1411 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:19,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:19,163 INFO L93 Difference]: Finished difference Result 559 states and 1724 transitions. [2021-06-12 20:00:19,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:19,163 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:19,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:19,164 INFO L225 Difference]: With dead ends: 559 [2021-06-12 20:00:19,164 INFO L226 Difference]: Without dead ends: 537 [2021-06-12 20:00:19,164 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 155.7ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:19,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-06-12 20:00:19,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 448. [2021-06-12 20:00:19,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 3.1297539149888145) internal successors, (1399), 447 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:19,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1399 transitions. [2021-06-12 20:00:19,169 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1399 transitions. Word has length 21 [2021-06-12 20:00:19,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:19,169 INFO L482 AbstractCegarLoop]: Abstraction has 448 states and 1399 transitions. [2021-06-12 20:00:19,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:19,169 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1399 transitions. [2021-06-12 20:00:19,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:19,170 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:19,170 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:19,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1739,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:19,370 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:19,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:19,370 INFO L82 PathProgramCache]: Analyzing trace with hash 360244147, now seen corresponding path program 380 times [2021-06-12 20:00:19,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:19,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134977176] [2021-06-12 20:00:19,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:19,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:19,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:19,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134977176] [2021-06-12 20:00:19,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134977176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:19,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101086678] [2021-06-12 20:00:19,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:19,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:19,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:19,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:19,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:19,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:19,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:19,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:19,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:19,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:19,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:19,570 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:00:19,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:19,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:19,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:19,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:19,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:19,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:19,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:19,695 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:7 [2021-06-12 20:00:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:19,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101086678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:19,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:19,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:00:19,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262659915] [2021-06-12 20:00:19,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:00:19,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:19,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:00:19,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:00:19,703 INFO L87 Difference]: Start difference. First operand 448 states and 1399 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:19,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:19,875 INFO L93 Difference]: Finished difference Result 547 states and 1673 transitions. [2021-06-12 20:00:19,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:19,875 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:19,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:19,876 INFO L225 Difference]: With dead ends: 547 [2021-06-12 20:00:19,876 INFO L226 Difference]: Without dead ends: 528 [2021-06-12 20:00:19,876 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 196.2ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:19,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-12 20:00:19,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 454. [2021-06-12 20:00:19,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 3.1390728476821192) internal successors, (1422), 453 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:19,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1422 transitions. [2021-06-12 20:00:19,881 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1422 transitions. Word has length 21 [2021-06-12 20:00:19,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:19,881 INFO L482 AbstractCegarLoop]: Abstraction has 454 states and 1422 transitions. [2021-06-12 20:00:19,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:19,881 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1422 transitions. [2021-06-12 20:00:19,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:19,881 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:19,881 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:20,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1743 [2021-06-12 20:00:20,082 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:20,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:20,082 INFO L82 PathProgramCache]: Analyzing trace with hash 138035535, now seen corresponding path program 381 times [2021-06-12 20:00:20,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:20,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843467452] [2021-06-12 20:00:20,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:20,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:20,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:20,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843467452] [2021-06-12 20:00:20,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843467452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:20,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639320862] [2021-06-12 20:00:20,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:20,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:00:20,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:20,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:20,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:20,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:20,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:20,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:20,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:20,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:20,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 20:00:20,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:00:20,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:20,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:20,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:20,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:20,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:20,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:20,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:20,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:20,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:20,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:20,424 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:51, output treesize:5 [2021-06-12 20:00:20,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:20,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639320862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:20,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:20,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:20,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77831170] [2021-06-12 20:00:20,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:20,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:20,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:20,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:20,453 INFO L87 Difference]: Start difference. First operand 454 states and 1422 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:20,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:20,843 INFO L93 Difference]: Finished difference Result 756 states and 2294 transitions. [2021-06-12 20:00:20,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:00:20,843 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:20,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:20,844 INFO L225 Difference]: With dead ends: 756 [2021-06-12 20:00:20,844 INFO L226 Difference]: Without dead ends: 696 [2021-06-12 20:00:20,844 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 280.5ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:00:20,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-06-12 20:00:20,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 454. [2021-06-12 20:00:20,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 3.1280353200883004) internal successors, (1417), 453 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:20,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1417 transitions. [2021-06-12 20:00:20,850 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1417 transitions. Word has length 21 [2021-06-12 20:00:20,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:20,850 INFO L482 AbstractCegarLoop]: Abstraction has 454 states and 1417 transitions. [2021-06-12 20:00:20,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:20,850 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1417 transitions. [2021-06-12 20:00:20,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:20,850 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:20,851 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:21,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 382 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1752 [2021-06-12 20:00:21,051 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:21,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:21,051 INFO L82 PathProgramCache]: Analyzing trace with hash 2046635987, now seen corresponding path program 382 times [2021-06-12 20:00:21,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:21,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851976689] [2021-06-12 20:00:21,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:21,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:21,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:21,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851976689] [2021-06-12 20:00:21,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851976689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:21,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939466368] [2021-06-12 20:00:21,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:21,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:21,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:21,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:21,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:21,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:21,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:21,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:21,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:21,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:21,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:21,271 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:00:21,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:21,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:21,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:21,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:21,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:21,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:21,379 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:21,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:21,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:21,394 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:13 [2021-06-12 20:00:21,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:21,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939466368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:21,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:21,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:21,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685598403] [2021-06-12 20:00:21,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:21,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:21,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:21,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:21,442 INFO L87 Difference]: Start difference. First operand 454 states and 1417 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:21,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:21,760 INFO L93 Difference]: Finished difference Result 704 states and 2159 transitions. [2021-06-12 20:00:21,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:00:21,760 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:21,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:21,761 INFO L225 Difference]: With dead ends: 704 [2021-06-12 20:00:21,761 INFO L226 Difference]: Without dead ends: 681 [2021-06-12 20:00:21,761 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 288.1ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:00:21,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-06-12 20:00:21,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 452. [2021-06-12 20:00:21,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.130820399113082) internal successors, (1412), 451 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:21,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1412 transitions. [2021-06-12 20:00:21,766 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1412 transitions. Word has length 21 [2021-06-12 20:00:21,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:21,766 INFO L482 AbstractCegarLoop]: Abstraction has 452 states and 1412 transitions. [2021-06-12 20:00:21,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:21,767 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1412 transitions. [2021-06-12 20:00:21,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:21,767 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:21,767 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:21,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1762 [2021-06-12 20:00:21,969 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:21,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:21,969 INFO L82 PathProgramCache]: Analyzing trace with hash 48507605, now seen corresponding path program 383 times [2021-06-12 20:00:21,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:21,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941692334] [2021-06-12 20:00:21,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:21,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:22,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:22,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:22,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941692334] [2021-06-12 20:00:22,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941692334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:22,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965766468] [2021-06-12 20:00:22,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:22,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:00:22,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:22,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:22,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:22,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:22,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:22,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:22,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:22,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:22,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:22,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:22,186 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:00:22,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:22,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:22,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:22,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:22,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:22,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:22,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:22,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:22,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:22,276 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:10 [2021-06-12 20:00:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:22,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965766468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:22,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:22,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:22,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53047324] [2021-06-12 20:00:22,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:22,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:22,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:22,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:22,320 INFO L87 Difference]: Start difference. First operand 452 states and 1412 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:22,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:22,616 INFO L93 Difference]: Finished difference Result 634 states and 1943 transitions. [2021-06-12 20:00:22,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:00:22,616 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:22,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:22,617 INFO L225 Difference]: With dead ends: 634 [2021-06-12 20:00:22,617 INFO L226 Difference]: Without dead ends: 615 [2021-06-12 20:00:22,618 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 275.9ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:00:22,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-06-12 20:00:22,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 448. [2021-06-12 20:00:22,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 3.1230425055928412) internal successors, (1396), 447 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:22,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1396 transitions. [2021-06-12 20:00:22,623 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1396 transitions. Word has length 21 [2021-06-12 20:00:22,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:22,623 INFO L482 AbstractCegarLoop]: Abstraction has 448 states and 1396 transitions. [2021-06-12 20:00:22,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:22,623 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1396 transitions. [2021-06-12 20:00:22,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:22,623 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:22,623 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:22,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1775 [2021-06-12 20:00:22,824 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:22,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:22,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1680454283, now seen corresponding path program 384 times [2021-06-12 20:00:22,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:22,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674939114] [2021-06-12 20:00:22,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:22,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:22,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:22,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674939114] [2021-06-12 20:00:22,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674939114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:22,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885342817] [2021-06-12 20:00:22,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:22,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:00:22,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:22,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:22,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:23,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:23,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:23,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:23,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:23,009 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:23,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:23,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:23,031 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:00:23,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:23,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:23,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:23,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:23,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:23,123 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:23,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:23,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:23,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:00:23,140 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:23,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:23,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:23,155 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:15 [2021-06-12 20:00:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:23,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885342817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:23,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:23,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:00:23,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581081124] [2021-06-12 20:00:23,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:00:23,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:23,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:00:23,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:00:23,182 INFO L87 Difference]: Start difference. First operand 448 states and 1396 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:23,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:23,366 INFO L93 Difference]: Finished difference Result 577 states and 1776 transitions. [2021-06-12 20:00:23,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:23,367 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:23,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:23,367 INFO L225 Difference]: With dead ends: 577 [2021-06-12 20:00:23,367 INFO L226 Difference]: Without dead ends: 548 [2021-06-12 20:00:23,368 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 168.1ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:00:23,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-06-12 20:00:23,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 448. [2021-06-12 20:00:23,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 3.1230425055928412) internal successors, (1396), 447 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:23,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1396 transitions. [2021-06-12 20:00:23,372 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1396 transitions. Word has length 21 [2021-06-12 20:00:23,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:23,373 INFO L482 AbstractCegarLoop]: Abstraction has 448 states and 1396 transitions. [2021-06-12 20:00:23,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:23,373 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1396 transitions. [2021-06-12 20:00:23,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:23,373 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:23,373 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:23,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 385 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1781 [2021-06-12 20:00:23,577 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:23,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:23,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1519814095, now seen corresponding path program 385 times [2021-06-12 20:00:23,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:23,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149947676] [2021-06-12 20:00:23,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:23,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:23,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149947676] [2021-06-12 20:00:23,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149947676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:23,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352618220] [2021-06-12 20:00:23,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:23,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:23,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:23,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:23,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:23,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:23,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:23,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:23,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 20:00:23,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:00:23,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:23,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:23,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:23,901 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:23,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:23,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:23,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:23,919 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:23,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:23,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:23,934 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:13 [2021-06-12 20:00:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:23,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352618220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:23,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:23,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:23,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381412187] [2021-06-12 20:00:23,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:23,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:23,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:23,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:23,990 INFO L87 Difference]: Start difference. First operand 448 states and 1396 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:24,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:24,537 INFO L93 Difference]: Finished difference Result 846 states and 2561 transitions. [2021-06-12 20:00:24,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:00:24,537 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:24,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:24,538 INFO L225 Difference]: With dead ends: 846 [2021-06-12 20:00:24,538 INFO L226 Difference]: Without dead ends: 792 [2021-06-12 20:00:24,539 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 476.7ms TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:00:24,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-06-12 20:00:24,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 449. [2021-06-12 20:00:24,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 3.1450892857142856) internal successors, (1409), 448 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:24,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1409 transitions. [2021-06-12 20:00:24,544 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1409 transitions. Word has length 21 [2021-06-12 20:00:24,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:24,544 INFO L482 AbstractCegarLoop]: Abstraction has 449 states and 1409 transitions. [2021-06-12 20:00:24,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:24,545 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1409 transitions. [2021-06-12 20:00:24,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:24,545 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:24,545 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:24,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1793 [2021-06-12 20:00:24,746 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:24,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:24,746 INFO L82 PathProgramCache]: Analyzing trace with hash 895528331, now seen corresponding path program 386 times [2021-06-12 20:00:24,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:24,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518937417] [2021-06-12 20:00:24,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:24,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:24,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:24,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518937417] [2021-06-12 20:00:24,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518937417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:24,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131737801] [2021-06-12 20:00:24,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:24,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:24,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:24,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:24,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:24,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:24,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:24,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:24,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:24,947 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:00:24,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:24,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:24,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:25,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:25,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:25,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:00:25,015 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:25,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:25,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:25,033 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:67, output treesize:21 [2021-06-12 20:00:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:25,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131737801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:25,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:25,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:00:25,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348677857] [2021-06-12 20:00:25,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:00:25,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:25,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:00:25,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:25,069 INFO L87 Difference]: Start difference. First operand 449 states and 1409 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:25,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:25,254 INFO L93 Difference]: Finished difference Result 585 states and 1806 transitions. [2021-06-12 20:00:25,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:25,255 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:25,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:25,256 INFO L225 Difference]: With dead ends: 585 [2021-06-12 20:00:25,256 INFO L226 Difference]: Without dead ends: 556 [2021-06-12 20:00:25,256 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:25,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-12 20:00:25,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 449. [2021-06-12 20:00:25,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 3.1450892857142856) internal successors, (1409), 448 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:25,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1409 transitions. [2021-06-12 20:00:25,261 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1409 transitions. Word has length 21 [2021-06-12 20:00:25,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:25,261 INFO L482 AbstractCegarLoop]: Abstraction has 449 states and 1409 transitions. [2021-06-12 20:00:25,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:25,261 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1409 transitions. [2021-06-12 20:00:25,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:25,261 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:25,261 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:25,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1806,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:25,462 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:25,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:25,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1192794741, now seen corresponding path program 387 times [2021-06-12 20:00:25,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:25,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096396753] [2021-06-12 20:00:25,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:25,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:25,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:25,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096396753] [2021-06-12 20:00:25,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096396753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:25,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007781084] [2021-06-12 20:00:25,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:25,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:00:25,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:25,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:25,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:25,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:25,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:25,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:25,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:25,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:25,670 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:25,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:25,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:25,685 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:00:25,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:25,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:25,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:25,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:25,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:25,733 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:25,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:25,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:25,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:25,753 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:25,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:25,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:25,771 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:65, output treesize:19 [2021-06-12 20:00:25,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:25,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007781084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:25,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:25,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:25,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666993215] [2021-06-12 20:00:25,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:25,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:25,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:25,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:25,844 INFO L87 Difference]: Start difference. First operand 449 states and 1409 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:26,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:26,230 INFO L93 Difference]: Finished difference Result 714 states and 2190 transitions. [2021-06-12 20:00:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:00:26,230 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:26,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:26,231 INFO L225 Difference]: With dead ends: 714 [2021-06-12 20:00:26,231 INFO L226 Difference]: Without dead ends: 691 [2021-06-12 20:00:26,231 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 368.8ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:00:26,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-06-12 20:00:26,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 449. [2021-06-12 20:00:26,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 3.1450892857142856) internal successors, (1409), 448 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:26,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1409 transitions. [2021-06-12 20:00:26,237 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1409 transitions. Word has length 21 [2021-06-12 20:00:26,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:26,237 INFO L482 AbstractCegarLoop]: Abstraction has 449 states and 1409 transitions. [2021-06-12 20:00:26,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:26,237 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1409 transitions. [2021-06-12 20:00:26,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:26,237 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:26,237 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:26,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1812 [2021-06-12 20:00:26,438 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:26,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:26,438 INFO L82 PathProgramCache]: Analyzing trace with hash -95799881, now seen corresponding path program 388 times [2021-06-12 20:00:26,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:26,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797026583] [2021-06-12 20:00:26,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:26,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:26,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:26,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797026583] [2021-06-12 20:00:26,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797026583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:26,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013075706] [2021-06-12 20:00:26,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:26,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:26,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:26,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:26,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:26,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:26,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:26,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:26,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:26,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 20:00:26,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:26,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:26,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:00:26,676 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:26,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:26,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:26,696 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:26,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:26,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:26,714 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:67, output treesize:19 [2021-06-12 20:00:26,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:26,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013075706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:26,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:26,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:26,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395702500] [2021-06-12 20:00:26,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:26,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:26,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:26,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:26,791 INFO L87 Difference]: Start difference. First operand 449 states and 1409 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:27,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:27,299 INFO L93 Difference]: Finished difference Result 765 states and 2323 transitions. [2021-06-12 20:00:27,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:00:27,299 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:27,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:27,300 INFO L225 Difference]: With dead ends: 765 [2021-06-12 20:00:27,300 INFO L226 Difference]: Without dead ends: 738 [2021-06-12 20:00:27,301 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 405.5ms TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:00:27,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2021-06-12 20:00:27,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 444. [2021-06-12 20:00:27,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 3.1218961625282167) internal successors, (1383), 443 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:27,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1383 transitions. [2021-06-12 20:00:27,306 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1383 transitions. Word has length 21 [2021-06-12 20:00:27,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:27,306 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 1383 transitions. [2021-06-12 20:00:27,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:27,306 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1383 transitions. [2021-06-12 20:00:27,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:27,307 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:27,307 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:27,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1823,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:27,507 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:27,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:27,507 INFO L82 PathProgramCache]: Analyzing trace with hash -2003051787, now seen corresponding path program 389 times [2021-06-12 20:00:27,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:27,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340472930] [2021-06-12 20:00:27,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:27,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:27,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:27,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:27,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340472930] [2021-06-12 20:00:27,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340472930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:27,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533299289] [2021-06-12 20:00:27,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:27,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:27,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:27,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:27,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:27,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:27,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:27,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:27,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:27,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:27,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:27,737 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:00:27,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:27,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:27,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:27,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:00:27,812 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:27,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:27,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:27,821 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 20:00:27,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:27,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533299289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:27,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:27,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:00:27,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075034044] [2021-06-12 20:00:27,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:00:27,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:27,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:00:27,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:27,835 INFO L87 Difference]: Start difference. First operand 444 states and 1383 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:27,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:27,993 INFO L93 Difference]: Finished difference Result 558 states and 1717 transitions. [2021-06-12 20:00:27,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:27,994 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:27,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:27,994 INFO L225 Difference]: With dead ends: 558 [2021-06-12 20:00:27,995 INFO L226 Difference]: Without dead ends: 536 [2021-06-12 20:00:27,995 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 151.4ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:27,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-12 20:00:27,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 447. [2021-06-12 20:00:27,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 3.1278026905829597) internal successors, (1395), 446 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:27,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1395 transitions. [2021-06-12 20:00:27,999 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1395 transitions. Word has length 21 [2021-06-12 20:00:27,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:27,999 INFO L482 AbstractCegarLoop]: Abstraction has 447 states and 1395 transitions. [2021-06-12 20:00:27,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:27,999 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1395 transitions. [2021-06-12 20:00:28,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:28,000 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:28,000 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:28,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1835 [2021-06-12 20:00:28,200 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:28,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:28,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1377727669, now seen corresponding path program 390 times [2021-06-12 20:00:28,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:28,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756504160] [2021-06-12 20:00:28,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:28,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:28,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:28,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:28,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756504160] [2021-06-12 20:00:28,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756504160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:28,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981237175] [2021-06-12 20:00:28,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:28,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:00:28,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:28,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:28,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:28,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:28,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:28,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:28,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:28,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 20:00:28,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:00:28,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:28,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:28,458 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:28,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:28,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:28,475 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:28,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:28,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:28,490 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:61, output treesize:13 [2021-06-12 20:00:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:28,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981237175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:28,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:28,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:28,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061146035] [2021-06-12 20:00:28,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:28,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:28,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:28,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:28,537 INFO L87 Difference]: Start difference. First operand 447 states and 1395 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:28,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:28,881 INFO L93 Difference]: Finished difference Result 654 states and 2000 transitions. [2021-06-12 20:00:28,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:00:28,881 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:28,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:28,882 INFO L225 Difference]: With dead ends: 654 [2021-06-12 20:00:28,882 INFO L226 Difference]: Without dead ends: 627 [2021-06-12 20:00:28,882 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 243.6ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:00:28,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-06-12 20:00:28,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 447. [2021-06-12 20:00:28,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 3.123318385650224) internal successors, (1393), 446 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:28,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1393 transitions. [2021-06-12 20:00:28,887 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1393 transitions. Word has length 21 [2021-06-12 20:00:28,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:28,887 INFO L482 AbstractCegarLoop]: Abstraction has 447 states and 1393 transitions. [2021-06-12 20:00:28,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:28,887 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1393 transitions. [2021-06-12 20:00:28,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:28,888 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:28,888 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:29,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1839,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:29,088 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:29,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:29,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1661990353, now seen corresponding path program 391 times [2021-06-12 20:00:29,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:29,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217850870] [2021-06-12 20:00:29,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:29,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:29,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:29,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217850870] [2021-06-12 20:00:29,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217850870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:29,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739388514] [2021-06-12 20:00:29,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:29,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:29,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:29,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:29,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:29,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:29,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:29,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:29,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:29,278 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:00:29,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:29,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:29,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:29,376 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:29,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:29,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:29,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:29,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:29,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:29,408 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:13 [2021-06-12 20:00:29,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:29,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739388514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:29,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:29,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:00:29,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906194220] [2021-06-12 20:00:29,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:00:29,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:29,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:00:29,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:00:29,438 INFO L87 Difference]: Start difference. First operand 447 states and 1393 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:29,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:29,679 INFO L93 Difference]: Finished difference Result 604 states and 1834 transitions. [2021-06-12 20:00:29,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:00:29,679 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:29,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:29,680 INFO L225 Difference]: With dead ends: 604 [2021-06-12 20:00:29,680 INFO L226 Difference]: Without dead ends: 577 [2021-06-12 20:00:29,680 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:29,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-12 20:00:29,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 460. [2021-06-12 20:00:29,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.1198257080610023) internal successors, (1432), 459 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:29,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1432 transitions. [2021-06-12 20:00:29,685 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1432 transitions. Word has length 21 [2021-06-12 20:00:29,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:29,685 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1432 transitions. [2021-06-12 20:00:29,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:29,685 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1432 transitions. [2021-06-12 20:00:29,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:29,686 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:29,686 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:29,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1845 [2021-06-12 20:00:29,886 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:29,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:29,887 INFO L82 PathProgramCache]: Analyzing trace with hash 24401487, now seen corresponding path program 392 times [2021-06-12 20:00:29,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:29,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414526311] [2021-06-12 20:00:29,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:29,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:29,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:29,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:29,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414526311] [2021-06-12 20:00:29,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414526311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:29,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953212206] [2021-06-12 20:00:29,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:30,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:30,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:30,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:30,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:30,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:30,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:30,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:30,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:30,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:30,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:30,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:30,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:30,098 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:00:30,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:30,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:30,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:30,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:30,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:30,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:30,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:30,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:30,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:30,215 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:7 [2021-06-12 20:00:30,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:30,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953212206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:30,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:30,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:30,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349254311] [2021-06-12 20:00:30,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:30,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:30,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:30,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:30,246 INFO L87 Difference]: Start difference. First operand 460 states and 1432 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:30,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:30,723 INFO L93 Difference]: Finished difference Result 636 states and 1940 transitions. [2021-06-12 20:00:30,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:00:30,723 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:30,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:30,724 INFO L225 Difference]: With dead ends: 636 [2021-06-12 20:00:30,724 INFO L226 Difference]: Without dead ends: 615 [2021-06-12 20:00:30,724 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 423.8ms TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:00:30,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-06-12 20:00:30,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 450. [2021-06-12 20:00:30,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 3.129175946547884) internal successors, (1405), 449 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:30,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1405 transitions. [2021-06-12 20:00:30,731 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1405 transitions. Word has length 21 [2021-06-12 20:00:30,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:30,731 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 1405 transitions. [2021-06-12 20:00:30,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:30,732 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1405 transitions. [2021-06-12 20:00:30,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:30,732 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:30,732 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:30,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 393 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1860 [2021-06-12 20:00:30,937 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:30,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:30,937 INFO L82 PathProgramCache]: Analyzing trace with hash 46905859, now seen corresponding path program 393 times [2021-06-12 20:00:30,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:30,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926574369] [2021-06-12 20:00:30,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:31,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:31,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:31,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926574369] [2021-06-12 20:00:31,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926574369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:31,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69032680] [2021-06-12 20:00:31,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:31,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:00:31,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:31,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:31,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:31,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:31,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:31,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:31,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:31,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:31,113 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:31,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:31,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:31,132 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:00:31,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:31,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:31,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:31,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:31,178 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:31,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:31,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:31,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:00:31,197 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:31,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:31,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:31,214 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:67, output treesize:21 [2021-06-12 20:00:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:31,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69032680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:31,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:31,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:00:31,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314496640] [2021-06-12 20:00:31,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:00:31,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:31,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:00:31,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:31,248 INFO L87 Difference]: Start difference. First operand 450 states and 1405 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:31,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:31,418 INFO L93 Difference]: Finished difference Result 576 states and 1776 transitions. [2021-06-12 20:00:31,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:31,418 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:31,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:31,419 INFO L225 Difference]: With dead ends: 576 [2021-06-12 20:00:31,419 INFO L226 Difference]: Without dead ends: 547 [2021-06-12 20:00:31,419 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:31,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-12 20:00:31,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 450. [2021-06-12 20:00:31,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 3.129175946547884) internal successors, (1405), 449 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:31,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1405 transitions. [2021-06-12 20:00:31,424 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1405 transitions. Word has length 21 [2021-06-12 20:00:31,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:31,424 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 1405 transitions. [2021-06-12 20:00:31,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:31,424 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1405 transitions. [2021-06-12 20:00:31,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:31,424 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:31,424 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:31,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1870 [2021-06-12 20:00:31,625 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:31,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:31,625 INFO L82 PathProgramCache]: Analyzing trace with hash 344172269, now seen corresponding path program 394 times [2021-06-12 20:00:31,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:31,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538413281] [2021-06-12 20:00:31,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:31,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:31,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:31,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:31,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538413281] [2021-06-12 20:00:31,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538413281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:31,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830206398] [2021-06-12 20:00:31,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:31,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:31,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:31,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:31,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:31,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:31,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:31,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:31,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:31,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:31,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 20:00:31,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:31,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:31,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:31,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:31,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:00:31,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:31,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:31,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:31,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:31,886 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:31,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:31,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:31,903 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:67, output treesize:19 [2021-06-12 20:00:31,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:31,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830206398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:31,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:31,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:31,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484083926] [2021-06-12 20:00:31,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:31,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:31,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:31,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:31,977 INFO L87 Difference]: Start difference. First operand 450 states and 1405 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:32,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:32,342 INFO L93 Difference]: Finished difference Result 644 states and 1975 transitions. [2021-06-12 20:00:32,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:00:32,342 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:32,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:32,343 INFO L225 Difference]: With dead ends: 644 [2021-06-12 20:00:32,343 INFO L226 Difference]: Without dead ends: 621 [2021-06-12 20:00:32,343 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 292.0ms TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:00:32,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-12 20:00:32,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 449. [2021-06-12 20:00:32,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 3.138392857142857) internal successors, (1406), 448 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:32,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1406 transitions. [2021-06-12 20:00:32,348 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1406 transitions. Word has length 21 [2021-06-12 20:00:32,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:32,348 INFO L482 AbstractCegarLoop]: Abstraction has 449 states and 1406 transitions. [2021-06-12 20:00:32,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:32,348 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1406 transitions. [2021-06-12 20:00:32,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:32,349 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:32,349 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:32,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1876,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:32,549 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:32,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:32,549 INFO L82 PathProgramCache]: Analyzing trace with hash 59909585, now seen corresponding path program 395 times [2021-06-12 20:00:32,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:32,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137183520] [2021-06-12 20:00:32,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:32,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:32,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:32,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137183520] [2021-06-12 20:00:32,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137183520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:32,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702405747] [2021-06-12 20:00:32,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:32,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:32,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:32,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:32,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:32,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:32,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:32,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:32,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:32,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:32,748 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:32,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:32,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:32,762 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:00:32,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:32,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:32,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:32,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:32,811 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:32,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:32,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:32,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:32,832 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:32,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:32,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:32,849 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:65, output treesize:19 [2021-06-12 20:00:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:32,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702405747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:32,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:32,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:32,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405736286] [2021-06-12 20:00:32,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:32,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:32,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:32,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:32,927 INFO L87 Difference]: Start difference. First operand 449 states and 1406 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:33,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:33,465 INFO L93 Difference]: Finished difference Result 734 states and 2236 transitions. [2021-06-12 20:00:33,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:00:33,465 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:33,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:33,466 INFO L225 Difference]: With dead ends: 734 [2021-06-12 20:00:33,466 INFO L226 Difference]: Without dead ends: 707 [2021-06-12 20:00:33,466 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 486.0ms TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:00:33,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-06-12 20:00:33,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 460. [2021-06-12 20:00:33,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.1416122004357296) internal successors, (1442), 459 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:33,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1442 transitions. [2021-06-12 20:00:33,472 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1442 transitions. Word has length 21 [2021-06-12 20:00:33,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:33,472 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1442 transitions. [2021-06-12 20:00:33,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:33,472 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1442 transitions. [2021-06-12 20:00:33,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:33,473 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:33,473 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:33,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1885 [2021-06-12 20:00:33,673 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:33,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:33,673 INFO L82 PathProgramCache]: Analyzing trace with hash 2135599375, now seen corresponding path program 396 times [2021-06-12 20:00:33,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:33,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353185284] [2021-06-12 20:00:33,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:33,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:33,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:33,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353185284] [2021-06-12 20:00:33,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353185284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:33,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135859442] [2021-06-12 20:00:33,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:33,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:00:33,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:33,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:33,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:33,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:33,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:33,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:33,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:33,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:33,872 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:33,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:33,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:33,887 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:00:33,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:33,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:33,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:33,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:33,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:33,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:33,956 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:33,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:33,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:33,964 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:10 [2021-06-12 20:00:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:34,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135859442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:34,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:34,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:34,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757523191] [2021-06-12 20:00:34,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:34,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:34,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:34,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:34,011 INFO L87 Difference]: Start difference. First operand 460 states and 1442 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:34,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:34,378 INFO L93 Difference]: Finished difference Result 641 states and 1961 transitions. [2021-06-12 20:00:34,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:00:34,379 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:34,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:34,379 INFO L225 Difference]: With dead ends: 641 [2021-06-12 20:00:34,380 INFO L226 Difference]: Without dead ends: 620 [2021-06-12 20:00:34,380 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 331.8ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:00:34,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-06-12 20:00:34,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 443. [2021-06-12 20:00:34,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.1199095022624435) internal successors, (1379), 442 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:34,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1379 transitions. [2021-06-12 20:00:34,385 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1379 transitions. Word has length 21 [2021-06-12 20:00:34,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:34,385 INFO L482 AbstractCegarLoop]: Abstraction has 443 states and 1379 transitions. [2021-06-12 20:00:34,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:34,385 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1379 transitions. [2021-06-12 20:00:34,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:34,385 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:34,385 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:34,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1900 [2021-06-12 20:00:34,586 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:34,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:34,586 INFO L82 PathProgramCache]: Analyzing trace with hash 809905741, now seen corresponding path program 397 times [2021-06-12 20:00:34,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:34,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787838728] [2021-06-12 20:00:34,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:34,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:34,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:34,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787838728] [2021-06-12 20:00:34,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787838728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:34,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199876429] [2021-06-12 20:00:34,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:34,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:34,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:34,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:34,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:34,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:34,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:34,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:34,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:34,783 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:38 [2021-06-12 20:00:34,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:34,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:34,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:34,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:00:34,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:34,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:34,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:34,902 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:33, output treesize:9 [2021-06-12 20:00:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:34,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199876429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:34,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:34,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:00:34,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477838328] [2021-06-12 20:00:34,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:00:34,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:34,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:00:34,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:00:34,911 INFO L87 Difference]: Start difference. First operand 443 states and 1379 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:35,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:35,082 INFO L93 Difference]: Finished difference Result 530 states and 1631 transitions. [2021-06-12 20:00:35,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:35,082 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:35,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:35,083 INFO L225 Difference]: With dead ends: 530 [2021-06-12 20:00:35,083 INFO L226 Difference]: Without dead ends: 508 [2021-06-12 20:00:35,083 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 170.9ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:00:35,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-12 20:00:35,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 454. [2021-06-12 20:00:35,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 3.1324503311258276) internal successors, (1419), 453 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:35,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1419 transitions. [2021-06-12 20:00:35,088 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1419 transitions. Word has length 21 [2021-06-12 20:00:35,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:35,088 INFO L482 AbstractCegarLoop]: Abstraction has 454 states and 1419 transitions. [2021-06-12 20:00:35,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:35,088 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1419 transitions. [2021-06-12 20:00:35,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:35,089 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:35,089 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:35,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1907 [2021-06-12 20:00:35,289 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:35,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:35,289 INFO L82 PathProgramCache]: Analyzing trace with hash 308114405, now seen corresponding path program 398 times [2021-06-12 20:00:35,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:35,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849944684] [2021-06-12 20:00:35,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:35,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:35,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:35,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849944684] [2021-06-12 20:00:35,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849944684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:35,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777814862] [2021-06-12 20:00:35,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:35,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:35,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:35,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:35,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:35,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:35,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:35,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:35,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:35,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:35,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:35,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:35,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:35,481 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:38 [2021-06-12 20:00:35,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:35,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:35,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:35,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:35,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:35,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:00:35,565 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:35,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:35,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:35,573 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:12 [2021-06-12 20:00:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:35,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777814862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:35,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:35,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:00:35,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945052832] [2021-06-12 20:00:35,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:00:35,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:35,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:00:35,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:35,587 INFO L87 Difference]: Start difference. First operand 454 states and 1419 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:35,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:35,739 INFO L93 Difference]: Finished difference Result 539 states and 1655 transitions. [2021-06-12 20:00:35,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:35,740 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:35,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:35,741 INFO L225 Difference]: With dead ends: 539 [2021-06-12 20:00:35,741 INFO L226 Difference]: Without dead ends: 517 [2021-06-12 20:00:35,741 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 148.5ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:35,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-12 20:00:35,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 451. [2021-06-12 20:00:35,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 3.1266666666666665) internal successors, (1407), 450 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:35,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1407 transitions. [2021-06-12 20:00:35,745 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1407 transitions. Word has length 21 [2021-06-12 20:00:35,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:35,746 INFO L482 AbstractCegarLoop]: Abstraction has 451 states and 1407 transitions. [2021-06-12 20:00:35,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:35,746 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1407 transitions. [2021-06-12 20:00:35,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:35,746 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:35,746 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:35,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1915,399 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:35,947 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:35,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:35,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1435229859, now seen corresponding path program 399 times [2021-06-12 20:00:35,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:35,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959138059] [2021-06-12 20:00:35,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:35,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:36,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:36,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:36,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959138059] [2021-06-12 20:00:36,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959138059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:36,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111475705] [2021-06-12 20:00:36,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:36,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:00:36,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:36,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:36,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:36,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:36,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:36,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:36,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:36,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:36,135 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:36,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:36,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:36,148 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:47, output treesize:31 [2021-06-12 20:00:36,217 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_4]} [2021-06-12 20:00:36,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:36,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:36,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:36,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:36,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:36,227 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:36,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:36,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:36,233 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:7 [2021-06-12 20:00:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:36,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111475705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:36,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:36,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:36,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106120143] [2021-06-12 20:00:36,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:36,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:36,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:36,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:36,261 INFO L87 Difference]: Start difference. First operand 451 states and 1407 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:36,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:36,641 INFO L93 Difference]: Finished difference Result 641 states and 1968 transitions. [2021-06-12 20:00:36,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:00:36,642 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:36,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:36,643 INFO L225 Difference]: With dead ends: 641 [2021-06-12 20:00:36,643 INFO L226 Difference]: Without dead ends: 622 [2021-06-12 20:00:36,643 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 312.5ms TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:00:36,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-06-12 20:00:36,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 461. [2021-06-12 20:00:36,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.143478260869565) internal successors, (1446), 460 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:36,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1446 transitions. [2021-06-12 20:00:36,648 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1446 transitions. Word has length 21 [2021-06-12 20:00:36,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:36,648 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1446 transitions. [2021-06-12 20:00:36,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:36,648 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1446 transitions. [2021-06-12 20:00:36,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:36,649 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:36,649 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:36,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1919 [2021-06-12 20:00:36,849 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:36,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:36,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1213021247, now seen corresponding path program 400 times [2021-06-12 20:00:36,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:36,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225646920] [2021-06-12 20:00:36,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:36,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:36,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:36,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225646920] [2021-06-12 20:00:36,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225646920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:36,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269682176] [2021-06-12 20:00:36,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:36,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:36,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:36,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:36,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:37,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:37,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:37,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:37,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:37,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-06-12 20:00:37,097 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_4]} [2021-06-12 20:00:37,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:00:37,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:37,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:37,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:37,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:37,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:37,113 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:37,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:37,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:37,123 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:45, output treesize:5 [2021-06-12 20:00:37,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:37,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269682176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:37,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:37,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:37,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673487861] [2021-06-12 20:00:37,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:37,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:37,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:37,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:37,150 INFO L87 Difference]: Start difference. First operand 461 states and 1446 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:37,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:37,465 INFO L93 Difference]: Finished difference Result 734 states and 2238 transitions. [2021-06-12 20:00:37,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:00:37,466 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:37,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:37,467 INFO L225 Difference]: With dead ends: 734 [2021-06-12 20:00:37,467 INFO L226 Difference]: Without dead ends: 674 [2021-06-12 20:00:37,467 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 259.8ms TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:00:37,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-06-12 20:00:37,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 461. [2021-06-12 20:00:37,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.132608695652174) internal successors, (1441), 460 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:37,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1441 transitions. [2021-06-12 20:00:37,472 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1441 transitions. Word has length 21 [2021-06-12 20:00:37,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:37,472 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1441 transitions. [2021-06-12 20:00:37,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:37,472 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1441 transitions. [2021-06-12 20:00:37,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:37,473 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:37,473 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:37,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1925,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:37,673 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:37,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:37,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1173345597, now seen corresponding path program 401 times [2021-06-12 20:00:37,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:37,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344424045] [2021-06-12 20:00:37,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:37,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:37,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344424045] [2021-06-12 20:00:37,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344424045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:37,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757740555] [2021-06-12 20:00:37,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:37,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:00:37,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:37,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:00:37,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:37,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:37,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:37,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:37,863 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:37,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:37,867 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:37,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:37,870 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:37,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:37,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:00:37,901 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:113, output treesize:81 [2021-06-12 20:00:37,997 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_4]} [2021-06-12 20:00:37,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 20:00:38,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:38,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:38,003 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:38,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:38,007 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:38,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:38,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:38,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:38,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-12 20:00:38,030 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:38,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:38,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:38,033 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:38,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:38,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:00:38,052 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:93, output treesize:26 [2021-06-12 20:00:38,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:38,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757740555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:38,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:38,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:38,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953161456] [2021-06-12 20:00:38,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:38,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:38,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:38,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:38,133 INFO L87 Difference]: Start difference. First operand 461 states and 1441 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:38,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:38,538 INFO L93 Difference]: Finished difference Result 745 states and 2283 transitions. [2021-06-12 20:00:38,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:00:38,538 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:38,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:38,539 INFO L225 Difference]: With dead ends: 745 [2021-06-12 20:00:38,539 INFO L226 Difference]: Without dead ends: 722 [2021-06-12 20:00:38,539 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 385.3ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:00:38,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-06-12 20:00:38,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 465. [2021-06-12 20:00:38,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.1314655172413794) internal successors, (1453), 464 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:38,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1453 transitions. [2021-06-12 20:00:38,545 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1453 transitions. Word has length 21 [2021-06-12 20:00:38,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:38,545 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1453 transitions. [2021-06-12 20:00:38,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:38,545 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1453 transitions. [2021-06-12 20:00:38,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:38,546 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:38,546 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:38,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1932 [2021-06-12 20:00:38,746 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:38,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:38,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1123493317, now seen corresponding path program 402 times [2021-06-12 20:00:38,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:38,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253989517] [2021-06-12 20:00:38,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:38,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:38,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:38,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253989517] [2021-06-12 20:00:38,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253989517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:38,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602600878] [2021-06-12 20:00:38,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:38,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:00:38,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:38,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:38,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:38,949 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[v_prenex_63]} [2021-06-12 20:00:38,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:38,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:38,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:38,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:38,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:38,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:38,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:38,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:38,982 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:50, output treesize:34 [2021-06-12 20:00:39,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:39,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:39,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:39,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:39,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:39,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:39,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:39,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:39,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:39,073 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:10 [2021-06-12 20:00:39,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:39,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602600878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:39,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:39,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:39,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956393723] [2021-06-12 20:00:39,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:39,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:39,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:39,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:39,117 INFO L87 Difference]: Start difference. First operand 465 states and 1453 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:39,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:39,411 INFO L93 Difference]: Finished difference Result 649 states and 1987 transitions. [2021-06-12 20:00:39,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:00:39,411 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:39,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:39,412 INFO L225 Difference]: With dead ends: 649 [2021-06-12 20:00:39,412 INFO L226 Difference]: Without dead ends: 630 [2021-06-12 20:00:39,412 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 311.9ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:00:39,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-06-12 20:00:39,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 461. [2021-06-12 20:00:39,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.123913043478261) internal successors, (1437), 460 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:39,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1437 transitions. [2021-06-12 20:00:39,418 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1437 transitions. Word has length 21 [2021-06-12 20:00:39,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:39,418 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1437 transitions. [2021-06-12 20:00:39,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:39,418 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1437 transitions. [2021-06-12 20:00:39,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:39,418 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:39,418 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:39,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1946,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:39,619 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:39,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:39,619 INFO L82 PathProgramCache]: Analyzing trace with hash -605468571, now seen corresponding path program 403 times [2021-06-12 20:00:39,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:39,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446443198] [2021-06-12 20:00:39,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:39,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:39,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:39,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446443198] [2021-06-12 20:00:39,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446443198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:39,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625504868] [2021-06-12 20:00:39,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:39,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:39,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:39,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:39,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:39,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:39,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:39,797 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:39,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:39,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:39,812 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-12 20:00:39,877 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_4]} [2021-06-12 20:00:39,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:39,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:39,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:39,883 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:39,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:39,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:39,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:00:39,898 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:39,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:39,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:39,910 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:15 [2021-06-12 20:00:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:39,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625504868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:39,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:39,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:00:39,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331496993] [2021-06-12 20:00:39,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:00:39,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:39,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:00:39,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:00:39,937 INFO L87 Difference]: Start difference. First operand 461 states and 1437 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:40,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:40,126 INFO L93 Difference]: Finished difference Result 585 states and 1803 transitions. [2021-06-12 20:00:40,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:40,127 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:40,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:40,128 INFO L225 Difference]: With dead ends: 585 [2021-06-12 20:00:40,128 INFO L226 Difference]: Without dead ends: 556 [2021-06-12 20:00:40,128 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:00:40,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-12 20:00:40,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 461. [2021-06-12 20:00:40,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.123913043478261) internal successors, (1437), 460 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:40,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1437 transitions. [2021-06-12 20:00:40,133 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1437 transitions. Word has length 21 [2021-06-12 20:00:40,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:40,133 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1437 transitions. [2021-06-12 20:00:40,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:40,133 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1437 transitions. [2021-06-12 20:00:40,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:40,133 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:40,133 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:40,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1951,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:40,334 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:40,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:40,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1700167489, now seen corresponding path program 404 times [2021-06-12 20:00:40,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:40,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250595502] [2021-06-12 20:00:40,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:40,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:40,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:40,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:40,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250595502] [2021-06-12 20:00:40,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250595502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:40,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090371314] [2021-06-12 20:00:40,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:40,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:40,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:40,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:40,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:40,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:40,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:40,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:40,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 20:00:40,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:00:40,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:40,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:40,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:40,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:40,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:40,622 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:13 [2021-06-12 20:00:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:40,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090371314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:40,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:40,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:00:40,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692238939] [2021-06-12 20:00:40,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:00:40,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:40,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:00:40,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:40,641 INFO L87 Difference]: Start difference. First operand 461 states and 1437 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:40,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:40,829 INFO L93 Difference]: Finished difference Result 548 states and 1686 transitions. [2021-06-12 20:00:40,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:40,829 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:40,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:40,830 INFO L225 Difference]: With dead ends: 548 [2021-06-12 20:00:40,830 INFO L226 Difference]: Without dead ends: 521 [2021-06-12 20:00:40,830 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 148.6ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:00:40,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-12 20:00:40,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 458. [2021-06-12 20:00:40,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.1269146608315097) internal successors, (1429), 457 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:40,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1429 transitions. [2021-06-12 20:00:40,835 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1429 transitions. Word has length 21 [2021-06-12 20:00:40,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:40,835 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1429 transitions. [2021-06-12 20:00:40,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:40,835 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1429 transitions. [2021-06-12 20:00:40,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:40,835 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:40,835 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:41,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1960 [2021-06-12 20:00:41,036 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:41,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:41,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1970514043, now seen corresponding path program 405 times [2021-06-12 20:00:41,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:41,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30711564] [2021-06-12 20:00:41,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:41,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:41,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:41,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30711564] [2021-06-12 20:00:41,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30711564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:41,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746765725] [2021-06-12 20:00:41,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:41,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:00:41,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:41,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:41,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:41,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:41,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:41,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:41,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:41,212 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:41,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:41,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:41,228 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:38 [2021-06-12 20:00:41,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:41,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:41,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:41,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:41,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:41,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:41,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:41,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:41,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:00:41,298 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:41,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:41,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:41,314 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:66, output treesize:21 [2021-06-12 20:00:41,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:41,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746765725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:41,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:41,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:00:41,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609453338] [2021-06-12 20:00:41,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:00:41,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:41,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:00:41,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:41,349 INFO L87 Difference]: Start difference. First operand 458 states and 1429 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:41,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:41,528 INFO L93 Difference]: Finished difference Result 588 states and 1811 transitions. [2021-06-12 20:00:41,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:41,528 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:41,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:41,529 INFO L225 Difference]: With dead ends: 588 [2021-06-12 20:00:41,529 INFO L226 Difference]: Without dead ends: 559 [2021-06-12 20:00:41,529 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 149.7ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:41,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-12 20:00:41,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 458. [2021-06-12 20:00:41,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.1269146608315097) internal successors, (1429), 457 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:41,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1429 transitions. [2021-06-12 20:00:41,538 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1429 transitions. Word has length 21 [2021-06-12 20:00:41,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:41,538 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1429 transitions. [2021-06-12 20:00:41,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:41,539 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1429 transitions. [2021-06-12 20:00:41,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:41,539 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:41,539 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:41,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1971 [2021-06-12 20:00:41,740 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:41,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:41,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2027186843, now seen corresponding path program 406 times [2021-06-12 20:00:41,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:41,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863943996] [2021-06-12 20:00:41,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:41,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:41,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:41,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863943996] [2021-06-12 20:00:41,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863943996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:41,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730469014] [2021-06-12 20:00:41,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:41,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:41,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:41,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:41,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:41,929 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_64], 1=[o_0]} [2021-06-12 20:00:41,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:41,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:41,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:41,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:41,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:41,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:41,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:41,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:41,962 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:50, output treesize:34 [2021-06-12 20:00:42,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:42,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:42,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:42,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:42,009 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:42,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:42,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:42,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:42,028 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:42,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:42,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:42,044 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:62, output treesize:19 [2021-06-12 20:00:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:42,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730469014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:42,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:42,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:00:42,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681402544] [2021-06-12 20:00:42,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:00:42,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:42,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:00:42,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:00:42,067 INFO L87 Difference]: Start difference. First operand 458 states and 1429 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:42,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:42,277 INFO L93 Difference]: Finished difference Result 647 states and 1973 transitions. [2021-06-12 20:00:42,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:42,278 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:42,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:42,279 INFO L225 Difference]: With dead ends: 647 [2021-06-12 20:00:42,279 INFO L226 Difference]: Without dead ends: 624 [2021-06-12 20:00:42,279 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 159.9ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:42,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-06-12 20:00:42,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 462. [2021-06-12 20:00:42,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.1453362255965294) internal successors, (1450), 461 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:42,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1450 transitions. [2021-06-12 20:00:42,284 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1450 transitions. Word has length 21 [2021-06-12 20:00:42,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:42,284 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1450 transitions. [2021-06-12 20:00:42,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:42,284 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1450 transitions. [2021-06-12 20:00:42,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:42,285 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:42,285 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:42,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1977 [2021-06-12 20:00:42,485 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:42,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:42,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1983517769, now seen corresponding path program 407 times [2021-06-12 20:00:42,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:42,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770668221] [2021-06-12 20:00:42,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:42,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:42,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:42,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:42,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770668221] [2021-06-12 20:00:42,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770668221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:42,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917534192] [2021-06-12 20:00:42,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:42,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:00:42,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:42,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:42,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:42,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:42,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:42,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:42,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:42,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:42,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 20:00:42,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:00:42,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:42,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:42,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:42,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:42,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:42,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:42,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:42,766 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:42,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:42,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:42,783 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:22 [2021-06-12 20:00:42,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:42,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917534192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:42,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:42,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:42,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105355391] [2021-06-12 20:00:42,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:42,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:42,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:42,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:42,860 INFO L87 Difference]: Start difference. First operand 462 states and 1450 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:43,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:43,281 INFO L93 Difference]: Finished difference Result 635 states and 1951 transitions. [2021-06-12 20:00:43,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:00:43,281 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:43,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:43,282 INFO L225 Difference]: With dead ends: 635 [2021-06-12 20:00:43,282 INFO L226 Difference]: Without dead ends: 608 [2021-06-12 20:00:43,282 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 355.2ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:00:43,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-06-12 20:00:43,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 460. [2021-06-12 20:00:43,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.1350762527233114) internal successors, (1439), 459 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:43,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1439 transitions. [2021-06-12 20:00:43,287 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1439 transitions. Word has length 21 [2021-06-12 20:00:43,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:43,287 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1439 transitions. [2021-06-12 20:00:43,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:43,288 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1439 transitions. [2021-06-12 20:00:43,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:43,288 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:43,288 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:43,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1985,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:43,489 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:43,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:43,489 INFO L82 PathProgramCache]: Analyzing trace with hash 559407445, now seen corresponding path program 408 times [2021-06-12 20:00:43,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:43,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425441428] [2021-06-12 20:00:43,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:43,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:43,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425441428] [2021-06-12 20:00:43,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425441428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:43,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226949126] [2021-06-12 20:00:43,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:43,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:00:43,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:43,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:43,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:43,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:43,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:43,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:43,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:43,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:43,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:19 [2021-06-12 20:00:43,727 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_4]} [2021-06-12 20:00:43,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:43,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:43,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:43,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:43,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:43,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:43,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:43,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:43,742 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:7 [2021-06-12 20:00:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:43,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226949126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:43,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:43,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:43,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781496485] [2021-06-12 20:00:43,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:43,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:43,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:43,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:43,770 INFO L87 Difference]: Start difference. First operand 460 states and 1439 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:44,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:44,047 INFO L93 Difference]: Finished difference Result 656 states and 2007 transitions. [2021-06-12 20:00:44,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:00:44,048 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:44,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:44,049 INFO L225 Difference]: With dead ends: 656 [2021-06-12 20:00:44,049 INFO L226 Difference]: Without dead ends: 637 [2021-06-12 20:00:44,049 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 278.8ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:00:44,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-06-12 20:00:44,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 464. [2021-06-12 20:00:44,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.1339092872570196) internal successors, (1451), 463 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:44,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1451 transitions. [2021-06-12 20:00:44,054 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1451 transitions. Word has length 21 [2021-06-12 20:00:44,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:44,054 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1451 transitions. [2021-06-12 20:00:44,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:44,054 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1451 transitions. [2021-06-12 20:00:44,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:44,055 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:44,055 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:44,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1997 [2021-06-12 20:00:44,255 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:44,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:44,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1474229035, now seen corresponding path program 409 times [2021-06-12 20:00:44,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:44,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068466030] [2021-06-12 20:00:44,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:44,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:44,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:44,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:44,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068466030] [2021-06-12 20:00:44,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068466030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:44,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664213643] [2021-06-12 20:00:44,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:44,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:44,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:44,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:44,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:44,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:44,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:44,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:44,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:44,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2021-06-12 20:00:44,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:44,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:44,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:44,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:44,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:44,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:44,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:44,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:44,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:44,535 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:10 [2021-06-12 20:00:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:44,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664213643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:44,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:44,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:44,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756791367] [2021-06-12 20:00:44,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:44,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:44,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:44,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:44,578 INFO L87 Difference]: Start difference. First operand 464 states and 1451 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:44,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:44,949 INFO L93 Difference]: Finished difference Result 642 states and 1970 transitions. [2021-06-12 20:00:44,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:00:44,950 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:44,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:44,950 INFO L225 Difference]: With dead ends: 642 [2021-06-12 20:00:44,951 INFO L226 Difference]: Without dead ends: 623 [2021-06-12 20:00:44,951 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 325.3ms TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:00:44,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-06-12 20:00:44,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 451. [2021-06-12 20:00:44,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 3.117777777777778) internal successors, (1403), 450 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:44,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1403 transitions. [2021-06-12 20:00:44,956 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1403 transitions. Word has length 21 [2021-06-12 20:00:44,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:44,956 INFO L482 AbstractCegarLoop]: Abstraction has 451 states and 1403 transitions. [2021-06-12 20:00:44,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:44,956 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1403 transitions. [2021-06-12 20:00:44,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:44,956 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:44,957 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:45,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1999 [2021-06-12 20:00:45,157 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:45,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:45,157 INFO L82 PathProgramCache]: Analyzing trace with hash -855966867, now seen corresponding path program 410 times [2021-06-12 20:00:45,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:45,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028408577] [2021-06-12 20:00:45,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:45,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:45,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028408577] [2021-06-12 20:00:45,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028408577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:45,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398147537] [2021-06-12 20:00:45,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:45,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:45,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:45,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:45,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:45,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:45,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:45,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:45,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-06-12 20:00:45,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:45,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:45,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:45,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:45,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:45,390 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:45,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,396 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:10 [2021-06-12 20:00:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:45,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398147537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:45,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:45,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:00:45,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003311676] [2021-06-12 20:00:45,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:00:45,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:45,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:00:45,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:45,409 INFO L87 Difference]: Start difference. First operand 451 states and 1403 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:45,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:45,587 INFO L93 Difference]: Finished difference Result 523 states and 1609 transitions. [2021-06-12 20:00:45,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:45,587 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:45,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:45,588 INFO L225 Difference]: With dead ends: 523 [2021-06-12 20:00:45,588 INFO L226 Difference]: Without dead ends: 504 [2021-06-12 20:00:45,588 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:45,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-12 20:00:45,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 447. [2021-06-12 20:00:45,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 3.118834080717489) internal successors, (1391), 446 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:45,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1391 transitions. [2021-06-12 20:00:45,593 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1391 transitions. Word has length 21 [2021-06-12 20:00:45,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:45,593 INFO L482 AbstractCegarLoop]: Abstraction has 447 states and 1391 transitions. [2021-06-12 20:00:45,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:45,593 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1391 transitions. [2021-06-12 20:00:45,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:45,593 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:45,593 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:45,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2002 [2021-06-12 20:00:45,794 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:45,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:45,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1380789453, now seen corresponding path program 411 times [2021-06-12 20:00:45,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:45,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596495482] [2021-06-12 20:00:45,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:45,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:45,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:45,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596495482] [2021-06-12 20:00:45,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596495482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:45,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690279816] [2021-06-12 20:00:45,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:45,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:00:45,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:45,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:45,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:45,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:45,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:45,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:45,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:25 [2021-06-12 20:00:46,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:00:46,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:46,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:46,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:00:46,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:46,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:46,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:46,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:00:46,039 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:46,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:46,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:46,051 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:15 [2021-06-12 20:00:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:46,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690279816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:46,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:46,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:00:46,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791968919] [2021-06-12 20:00:46,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:00:46,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:46,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:00:46,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:46,069 INFO L87 Difference]: Start difference. First operand 447 states and 1391 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:46,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:46,218 INFO L93 Difference]: Finished difference Result 544 states and 1671 transitions. [2021-06-12 20:00:46,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:46,218 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:46,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:46,219 INFO L225 Difference]: With dead ends: 544 [2021-06-12 20:00:46,219 INFO L226 Difference]: Without dead ends: 508 [2021-06-12 20:00:46,219 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:46,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-12 20:00:46,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 447. [2021-06-12 20:00:46,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 3.118834080717489) internal successors, (1391), 446 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:46,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1391 transitions. [2021-06-12 20:00:46,224 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1391 transitions. Word has length 21 [2021-06-12 20:00:46,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:46,224 INFO L482 AbstractCegarLoop]: Abstraction has 447 states and 1391 transitions. [2021-06-12 20:00:46,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:46,224 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1391 transitions. [2021-06-12 20:00:46,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:46,224 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:46,224 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:46,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2004 [2021-06-12 20:00:46,425 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:46,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:46,425 INFO L82 PathProgramCache]: Analyzing trace with hash 286090535, now seen corresponding path program 412 times [2021-06-12 20:00:46,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:46,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795310674] [2021-06-12 20:00:46,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:46,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:46,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:46,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795310674] [2021-06-12 20:00:46,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795310674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:46,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953827459] [2021-06-12 20:00:46,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:46,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:46,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:46,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:46,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:46,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:46,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:46,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:46,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:46,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:46,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:46,630 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-12 20:00:46,660 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_65, v_prenex_66], 1=[o_0, o_4]} [2021-06-12 20:00:46,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:46,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:46,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:46,684 INFO L518 ElimStorePlain]: Eliminatee v_prenex_66 vanished before elimination [2021-06-12 20:00:46,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:46,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:46,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:46,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:46,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:46,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:46,699 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:46,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:46,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:46,707 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:43, output treesize:13 [2021-06-12 20:00:46,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:46,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953827459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:46,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:46,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:00:46,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118814461] [2021-06-12 20:00:46,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:00:46,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:46,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:00:46,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:00:46,737 INFO L87 Difference]: Start difference. First operand 447 states and 1391 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:46,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:46,976 INFO L93 Difference]: Finished difference Result 585 states and 1790 transitions. [2021-06-12 20:00:46,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:00:46,976 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:46,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:46,977 INFO L225 Difference]: With dead ends: 585 [2021-06-12 20:00:46,977 INFO L226 Difference]: Without dead ends: 558 [2021-06-12 20:00:46,977 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 174.3ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:46,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-12 20:00:46,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 462. [2021-06-12 20:00:46,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.117136659436009) internal successors, (1437), 461 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:46,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1437 transitions. [2021-06-12 20:00:46,982 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1437 transitions. Word has length 21 [2021-06-12 20:00:46,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:46,982 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1437 transitions. [2021-06-12 20:00:46,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:46,982 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1437 transitions. [2021-06-12 20:00:46,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:46,983 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:46,983 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:47,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2011,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:47,183 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:47,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:47,184 INFO L82 PathProgramCache]: Analyzing trace with hash -2128123823, now seen corresponding path program 413 times [2021-06-12 20:00:47,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:47,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490913843] [2021-06-12 20:00:47,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:47,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:47,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490913843] [2021-06-12 20:00:47,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490913843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:47,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079250303] [2021-06-12 20:00:47,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:47,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:00:47,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:47,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:00:47,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:47,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:47,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:47,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:47,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:47,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:47,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:47,385 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-12 20:00:47,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:47,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:47,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:47,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:47,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:47,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:47,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:47,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:47,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:47,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:47,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:47,455 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:47,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:47,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:47,457 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:47,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:47,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:47,476 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:25 [2021-06-12 20:00:47,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:47,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079250303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:47,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:47,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:47,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321665463] [2021-06-12 20:00:47,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:47,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:47,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:47,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:47,526 INFO L87 Difference]: Start difference. First operand 462 states and 1437 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:47,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:47,720 INFO L93 Difference]: Finished difference Result 535 states and 1637 transitions. [2021-06-12 20:00:47,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:00:47,720 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:47,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:47,721 INFO L225 Difference]: With dead ends: 535 [2021-06-12 20:00:47,721 INFO L226 Difference]: Without dead ends: 514 [2021-06-12 20:00:47,721 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 215.6ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:47,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-06-12 20:00:47,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 444. [2021-06-12 20:00:47,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 3.1218961625282167) internal successors, (1383), 443 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:47,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1383 transitions. [2021-06-12 20:00:47,731 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1383 transitions. Word has length 21 [2021-06-12 20:00:47,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:47,731 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 1383 transitions. [2021-06-12 20:00:47,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:47,732 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1383 transitions. [2021-06-12 20:00:47,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:47,732 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:47,732 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:47,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2023 [2021-06-12 20:00:47,933 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:47,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:47,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1475830781, now seen corresponding path program 414 times [2021-06-12 20:00:47,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:47,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393234968] [2021-06-12 20:00:47,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:47,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:48,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:48,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393234968] [2021-06-12 20:00:48,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393234968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:48,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731020396] [2021-06-12 20:00:48,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:48,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:00:48,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:48,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:48,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:48,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:48,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:48,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:48,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:48,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:30 [2021-06-12 20:00:48,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:48,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:48,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:00:48,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:48,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:00:48,139 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:48,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:48,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:48,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:00:48,157 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:48,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:48,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:48,172 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:21 [2021-06-12 20:00:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:48,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731020396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:48,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:48,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:00:48,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176488370] [2021-06-12 20:00:48,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:00:48,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:48,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:00:48,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:48,206 INFO L87 Difference]: Start difference. First operand 444 states and 1383 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:48,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:48,373 INFO L93 Difference]: Finished difference Result 559 states and 1711 transitions. [2021-06-12 20:00:48,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:48,373 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:48,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:48,374 INFO L225 Difference]: With dead ends: 559 [2021-06-12 20:00:48,374 INFO L226 Difference]: Without dead ends: 523 [2021-06-12 20:00:48,374 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:48,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-06-12 20:00:48,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 445. [2021-06-12 20:00:48,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 3.126126126126126) internal successors, (1388), 444 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:48,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1388 transitions. [2021-06-12 20:00:48,379 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1388 transitions. Word has length 21 [2021-06-12 20:00:48,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:48,379 INFO L482 AbstractCegarLoop]: Abstraction has 445 states and 1388 transitions. [2021-06-12 20:00:48,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:48,379 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1388 transitions. [2021-06-12 20:00:48,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:48,379 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:48,379 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:48,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2032,415 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:48,580 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:48,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:48,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1178564371, now seen corresponding path program 415 times [2021-06-12 20:00:48,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:48,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426976612] [2021-06-12 20:00:48,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:48,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:48,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:48,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:48,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426976612] [2021-06-12 20:00:48,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426976612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:48,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727541463] [2021-06-12 20:00:48,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:48,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:48,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:48,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:48,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:48,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:48,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:48,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:48,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:48,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:48,785 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:00:48,818 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_68, v_prenex_67], 1=[o_0, o_4]} [2021-06-12 20:00:48,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:48,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:48,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:48,834 INFO L518 ElimStorePlain]: Eliminatee v_prenex_67 vanished before elimination [2021-06-12 20:00:48,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:48,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:48,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:48,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:48,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:48,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:48,850 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:48,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:48,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:48,861 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:51, output treesize:19 [2021-06-12 20:00:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:48,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727541463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:48,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:48,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:48,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129982218] [2021-06-12 20:00:48,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:48,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:48,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:48,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:48,941 INFO L87 Difference]: Start difference. First operand 445 states and 1388 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:49,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:49,294 INFO L93 Difference]: Finished difference Result 710 states and 2167 transitions. [2021-06-12 20:00:49,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:00:49,295 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:49,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:49,296 INFO L225 Difference]: With dead ends: 710 [2021-06-12 20:00:49,296 INFO L226 Difference]: Without dead ends: 687 [2021-06-12 20:00:49,296 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 274.7ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:00:49,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-06-12 20:00:49,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 460. [2021-06-12 20:00:49,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.1437908496732025) internal successors, (1443), 459 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:49,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1443 transitions. [2021-06-12 20:00:49,301 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1443 transitions. Word has length 21 [2021-06-12 20:00:49,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:49,301 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1443 transitions. [2021-06-12 20:00:49,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:49,301 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1443 transitions. [2021-06-12 20:00:49,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:49,302 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:49,302 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:49,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 416 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2036 [2021-06-12 20:00:49,502 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:49,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:49,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1462827055, now seen corresponding path program 416 times [2021-06-12 20:00:49,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:49,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280122416] [2021-06-12 20:00:49,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:49,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:49,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:49,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280122416] [2021-06-12 20:00:49,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280122416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:49,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109242837] [2021-06-12 20:00:49,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:49,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:49,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:49,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:49,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:49,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:49,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:49,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:49,683 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:49,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:49,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:49,699 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:00:49,733 INFO L446 ElimStorePlain]: Different costs {0=[o_0, o_4], 1=[v_prenex_70, v_prenex_69]} [2021-06-12 20:00:49,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:49,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:49,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:49,748 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:00:49,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:49,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:49,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:49,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:49,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:49,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:49,764 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:49,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:49,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:49,774 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:51, output treesize:19 [2021-06-12 20:00:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:49,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109242837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:49,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:49,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:49,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744931997] [2021-06-12 20:00:49,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:49,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:49,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:49,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:49,850 INFO L87 Difference]: Start difference. First operand 460 states and 1443 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:50,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:50,274 INFO L93 Difference]: Finished difference Result 698 states and 2124 transitions. [2021-06-12 20:00:50,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:00:50,274 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:50,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:50,275 INFO L225 Difference]: With dead ends: 698 [2021-06-12 20:00:50,276 INFO L226 Difference]: Without dead ends: 671 [2021-06-12 20:00:50,276 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 313.8ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:00:50,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-06-12 20:00:50,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 478. [2021-06-12 20:00:50,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.150943396226415) internal successors, (1503), 477 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:50,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1503 transitions. [2021-06-12 20:00:50,283 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1503 transitions. Word has length 21 [2021-06-12 20:00:50,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:50,283 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1503 transitions. [2021-06-12 20:00:50,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:50,283 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1503 transitions. [2021-06-12 20:00:50,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:50,295 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:50,295 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:50,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2045 [2021-06-12 20:00:50,507 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:50,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:50,508 INFO L82 PathProgramCache]: Analyzing trace with hash 871393275, now seen corresponding path program 417 times [2021-06-12 20:00:50,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:50,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142015610] [2021-06-12 20:00:50,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:50,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:50,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:50,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:50,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142015610] [2021-06-12 20:00:50,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142015610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:50,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654657897] [2021-06-12 20:00:50,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:50,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:00:50,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:50,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:50,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:50,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:50,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:50,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:50,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:50,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:50,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:50,710 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:00:50,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:50,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:50,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:50,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:50,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:50,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:50,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:50,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:50,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:50,773 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:10 [2021-06-12 20:00:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:50,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654657897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:50,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:50,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:50,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625312829] [2021-06-12 20:00:50,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:50,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:50,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:50,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:50,820 INFO L87 Difference]: Start difference. First operand 478 states and 1503 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:51,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:51,100 INFO L93 Difference]: Finished difference Result 661 states and 2031 transitions. [2021-06-12 20:00:51,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:00:51,100 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:51,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:51,101 INFO L225 Difference]: With dead ends: 661 [2021-06-12 20:00:51,101 INFO L226 Difference]: Without dead ends: 642 [2021-06-12 20:00:51,101 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 240.6ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:00:51,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-06-12 20:00:51,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 464. [2021-06-12 20:00:51,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.140388768898488) internal successors, (1454), 463 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:51,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1454 transitions. [2021-06-12 20:00:51,107 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1454 transitions. Word has length 21 [2021-06-12 20:00:51,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:51,107 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1454 transitions. [2021-06-12 20:00:51,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:51,107 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1454 transitions. [2021-06-12 20:00:51,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:51,107 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:51,107 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:51,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2057,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:51,308 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:51,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:51,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1416765929, now seen corresponding path program 418 times [2021-06-12 20:00:51,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:51,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955418883] [2021-06-12 20:00:51,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:51,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:51,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:51,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955418883] [2021-06-12 20:00:51,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955418883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:51,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205528547] [2021-06-12 20:00:51,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:51,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:51,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:51,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:51,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:51,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:51,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:51,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:51,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:51,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:51,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:51,498 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:00:51,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:51,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:51,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:51,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:51,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:51,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:51,591 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:51,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:51,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:51,596 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:28, output treesize:7 [2021-06-12 20:00:51,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:51,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205528547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:51,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:51,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:00:51,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265648510] [2021-06-12 20:00:51,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:00:51,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:51,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:00:51,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:00:51,607 INFO L87 Difference]: Start difference. First operand 464 states and 1454 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:51,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:51,782 INFO L93 Difference]: Finished difference Result 566 states and 1726 transitions. [2021-06-12 20:00:51,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:51,782 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:51,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:51,783 INFO L225 Difference]: With dead ends: 566 [2021-06-12 20:00:51,783 INFO L226 Difference]: Without dead ends: 545 [2021-06-12 20:00:51,783 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 181.0ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:51,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-06-12 20:00:51,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 460. [2021-06-12 20:00:51,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.1416122004357296) internal successors, (1442), 459 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:51,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1442 transitions. [2021-06-12 20:00:51,788 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1442 transitions. Word has length 21 [2021-06-12 20:00:51,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:51,788 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1442 transitions. [2021-06-12 20:00:51,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:51,788 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1442 transitions. [2021-06-12 20:00:51,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:51,789 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:51,789 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:51,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2061 [2021-06-12 20:00:51,989 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:51,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:51,990 INFO L82 PathProgramCache]: Analyzing trace with hash -302218753, now seen corresponding path program 419 times [2021-06-12 20:00:51,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:51,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186554159] [2021-06-12 20:00:51,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:51,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:52,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:52,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186554159] [2021-06-12 20:00:52,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186554159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:52,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610822035] [2021-06-12 20:00:52,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:52,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:00:52,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:52,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:00:52,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:52,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:52,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:52,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:52,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:52,191 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:00:52,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:52,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:52,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:52,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:52,275 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:52,278 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:52,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:52,300 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:31 [2021-06-12 20:00:52,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:52,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610822035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:52,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:52,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:52,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285328582] [2021-06-12 20:00:52,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:52,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:52,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:52,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:52,377 INFO L87 Difference]: Start difference. First operand 460 states and 1442 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:52,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:52,730 INFO L93 Difference]: Finished difference Result 624 states and 1923 transitions. [2021-06-12 20:00:52,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:00:52,730 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:52,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:52,731 INFO L225 Difference]: With dead ends: 624 [2021-06-12 20:00:52,731 INFO L226 Difference]: Without dead ends: 603 [2021-06-12 20:00:52,732 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 309.5ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:00:52,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-06-12 20:00:52,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 443. [2021-06-12 20:00:52,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.1199095022624435) internal successors, (1379), 442 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:52,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1379 transitions. [2021-06-12 20:00:52,737 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1379 transitions. Word has length 21 [2021-06-12 20:00:52,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:52,737 INFO L482 AbstractCegarLoop]: Abstraction has 443 states and 1379 transitions. [2021-06-12 20:00:52,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:52,737 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1379 transitions. [2021-06-12 20:00:52,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:52,737 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:52,737 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:52,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2068 [2021-06-12 20:00:52,938 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:52,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:52,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1465558931, now seen corresponding path program 420 times [2021-06-12 20:00:52,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:52,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277082169] [2021-06-12 20:00:52,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:53,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:53,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277082169] [2021-06-12 20:00:53,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277082169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:53,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189731452] [2021-06-12 20:00:53,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:53,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:00:53,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:53,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:53,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:53,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:53,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:53,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:53,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:53,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:53,110 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:53,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:53,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:53,122 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-12 20:00:53,166 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_0]} [2021-06-12 20:00:53,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:53,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:53,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:53,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:53,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:00:53,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:53,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:53,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:53,183 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:35, output treesize:12 [2021-06-12 20:00:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:53,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189731452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:53,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:53,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:00:53,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155909559] [2021-06-12 20:00:53,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:00:53,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:53,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:00:53,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:53,197 INFO L87 Difference]: Start difference. First operand 443 states and 1379 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:53,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:53,332 INFO L93 Difference]: Finished difference Result 523 states and 1610 transitions. [2021-06-12 20:00:53,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:53,332 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:53,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:53,333 INFO L225 Difference]: With dead ends: 523 [2021-06-12 20:00:53,333 INFO L226 Difference]: Without dead ends: 501 [2021-06-12 20:00:53,333 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 147.7ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:53,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-12 20:00:53,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 449. [2021-06-12 20:00:53,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 3.125) internal successors, (1400), 448 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:53,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1400 transitions. [2021-06-12 20:00:53,338 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1400 transitions. Word has length 21 [2021-06-12 20:00:53,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:53,338 INFO L482 AbstractCegarLoop]: Abstraction has 449 states and 1400 transitions. [2021-06-12 20:00:53,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:53,338 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1400 transitions. [2021-06-12 20:00:53,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:53,339 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:53,339 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:53,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2075,421 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:53,539 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:53,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:53,539 INFO L82 PathProgramCache]: Analyzing trace with hash -840234813, now seen corresponding path program 421 times [2021-06-12 20:00:53,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:53,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944710871] [2021-06-12 20:00:53,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:53,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:53,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944710871] [2021-06-12 20:00:53,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944710871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:53,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819999454] [2021-06-12 20:00:53,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:53,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:53,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:53,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:53,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:53,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:53,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:53,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:53,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-06-12 20:00:53,757 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_0]} [2021-06-12 20:00:53,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:53,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:53,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:00:53,763 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:53,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:53,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:53,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:53,777 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:53,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:53,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:53,789 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:13 [2021-06-12 20:00:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:53,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819999454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:53,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:53,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:53,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527630471] [2021-06-12 20:00:53,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:53,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:53,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:53,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:53,837 INFO L87 Difference]: Start difference. First operand 449 states and 1400 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:54,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:54,098 INFO L93 Difference]: Finished difference Result 613 states and 1885 transitions. [2021-06-12 20:00:54,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:00:54,098 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:54,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:54,099 INFO L225 Difference]: With dead ends: 613 [2021-06-12 20:00:54,099 INFO L226 Difference]: Without dead ends: 586 [2021-06-12 20:00:54,099 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 209.1ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:54,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-06-12 20:00:54,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 449. [2021-06-12 20:00:54,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 3.1205357142857144) internal successors, (1398), 448 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:54,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1398 transitions. [2021-06-12 20:00:54,104 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1398 transitions. Word has length 21 [2021-06-12 20:00:54,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:54,104 INFO L482 AbstractCegarLoop]: Abstraction has 449 states and 1398 transitions. [2021-06-12 20:00:54,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:54,104 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1398 transitions. [2021-06-12 20:00:54,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:54,105 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:54,105 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:54,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 422 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2078 [2021-06-12 20:00:54,305 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:54,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:54,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1124497497, now seen corresponding path program 422 times [2021-06-12 20:00:54,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:54,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625725541] [2021-06-12 20:00:54,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:54,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:54,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:54,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625725541] [2021-06-12 20:00:54,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625725541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:54,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976393562] [2021-06-12 20:00:54,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:54,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:54,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:54,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:54,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:54,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:54,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:54,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:54,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:54,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:54,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:54,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:54,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:54,499 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:47, output treesize:31 [2021-06-12 20:00:54,556 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_0]} [2021-06-12 20:00:54,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:54,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:54,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:54,561 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:54,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:54,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:54,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:54,576 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:54,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:54,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:54,589 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:13 [2021-06-12 20:00:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:54,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976393562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:54,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:54,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:54,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377910764] [2021-06-12 20:00:54,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:54,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:54,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:54,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:54,639 INFO L87 Difference]: Start difference. First operand 449 states and 1398 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:55,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:55,041 INFO L93 Difference]: Finished difference Result 724 states and 2210 transitions. [2021-06-12 20:00:55,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:00:55,041 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:55,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:55,043 INFO L225 Difference]: With dead ends: 724 [2021-06-12 20:00:55,043 INFO L226 Difference]: Without dead ends: 697 [2021-06-12 20:00:55,043 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 351.5ms TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:00:55,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2021-06-12 20:00:55,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 463. [2021-06-12 20:00:55,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.119047619047619) internal successors, (1441), 462 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:55,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1441 transitions. [2021-06-12 20:00:55,049 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1441 transitions. Word has length 21 [2021-06-12 20:00:55,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:55,049 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1441 transitions. [2021-06-12 20:00:55,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:55,049 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1441 transitions. [2021-06-12 20:00:55,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:55,049 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:55,050 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:55,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2082 [2021-06-12 20:00:55,250 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:55,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:55,250 INFO L82 PathProgramCache]: Analyzing trace with hash 561894343, now seen corresponding path program 423 times [2021-06-12 20:00:55,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:55,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729936915] [2021-06-12 20:00:55,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:55,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:55,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:55,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:55,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729936915] [2021-06-12 20:00:55,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729936915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:55,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334281778] [2021-06-12 20:00:55,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:55,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:00:55,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:55,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:55,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:55,455 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[v_prenex_71]} [2021-06-12 20:00:55,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:55,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:55,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:55,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:55,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:55,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:55,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:55,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:55,488 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:36 [2021-06-12 20:00:55,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:55,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:55,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:55,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:55,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:55,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:55,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:55,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:55,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:55,603 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:35, output treesize:7 [2021-06-12 20:00:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:55,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334281778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:55,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:55,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:55,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672420052] [2021-06-12 20:00:55,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:55,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:55,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:55,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:55,640 INFO L87 Difference]: Start difference. First operand 463 states and 1441 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:56,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:56,083 INFO L93 Difference]: Finished difference Result 644 states and 1965 transitions. [2021-06-12 20:00:56,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:00:56,084 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:56,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:56,085 INFO L225 Difference]: With dead ends: 644 [2021-06-12 20:00:56,085 INFO L226 Difference]: Without dead ends: 623 [2021-06-12 20:00:56,085 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 426.5ms TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:00:56,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-06-12 20:00:56,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 464. [2021-06-12 20:00:56,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.127429805615551) internal successors, (1448), 463 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:56,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1448 transitions. [2021-06-12 20:00:56,090 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1448 transitions. Word has length 21 [2021-06-12 20:00:56,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:56,090 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1448 transitions. [2021-06-12 20:00:56,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:56,090 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1448 transitions. [2021-06-12 20:00:56,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:56,091 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:56,091 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:56,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2093,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:56,291 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:56,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:56,292 INFO L82 PathProgramCache]: Analyzing trace with hash 584398715, now seen corresponding path program 424 times [2021-06-12 20:00:56,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:56,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74161630] [2021-06-12 20:00:56,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:56,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:56,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:56,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74161630] [2021-06-12 20:00:56,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74161630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:56,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271949128] [2021-06-12 20:00:56,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:56,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:56,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:56,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:56,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:56,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:56,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:56,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:56,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:56,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:56,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:56,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:56,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:56,485 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:42 [2021-06-12 20:00:56,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:56,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:56,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:56,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:56,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:56,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:56,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:56,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:56,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:00:56,564 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:56,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:56,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:56,579 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:70, output treesize:21 [2021-06-12 20:00:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:56,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271949128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:56,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:56,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:00:56,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308517580] [2021-06-12 20:00:56,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:00:56,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:56,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:00:56,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:56,620 INFO L87 Difference]: Start difference. First operand 464 states and 1448 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:56,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:56,763 INFO L93 Difference]: Finished difference Result 585 states and 1805 transitions. [2021-06-12 20:00:56,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:56,763 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:56,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:56,764 INFO L225 Difference]: With dead ends: 585 [2021-06-12 20:00:56,764 INFO L226 Difference]: Without dead ends: 556 [2021-06-12 20:00:56,764 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 154.7ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:56,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-12 20:00:56,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 464. [2021-06-12 20:00:56,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.127429805615551) internal successors, (1448), 463 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:56,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1448 transitions. [2021-06-12 20:00:56,769 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1448 transitions. Word has length 21 [2021-06-12 20:00:56,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:56,769 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1448 transitions. [2021-06-12 20:00:56,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:56,769 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1448 transitions. [2021-06-12 20:00:56,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:56,770 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:56,770 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:56,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2101 [2021-06-12 20:00:56,970 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:56,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:56,971 INFO L82 PathProgramCache]: Analyzing trace with hash 881665125, now seen corresponding path program 425 times [2021-06-12 20:00:56,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:56,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425259322] [2021-06-12 20:00:56,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:57,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:57,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425259322] [2021-06-12 20:00:57,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425259322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:57,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813591247] [2021-06-12 20:00:57,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:57,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:00:57,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:57,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:00:57,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:57,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:57,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:57,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:57,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:57,171 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:77, output treesize:63 [2021-06-12 20:00:57,216 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_0]} [2021-06-12 20:00:57,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:57,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:00:57,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:00:57,227 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:57,229 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:57,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:57,271 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:57,274 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:57,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:00:57,311 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:141, output treesize:57 [2021-06-12 20:00:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:57,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813591247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:57,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:57,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:57,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161823797] [2021-06-12 20:00:57,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:57,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:57,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:57,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:57,434 INFO L87 Difference]: Start difference. First operand 464 states and 1448 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:57,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:57,984 INFO L93 Difference]: Finished difference Result 673 states and 2067 transitions. [2021-06-12 20:00:57,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:00:57,984 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:57,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:57,985 INFO L225 Difference]: With dead ends: 673 [2021-06-12 20:00:57,985 INFO L226 Difference]: Without dead ends: 631 [2021-06-12 20:00:57,985 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 527.6ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:00:57,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-12 20:00:57,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 463. [2021-06-12 20:00:57,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.1363636363636362) internal successors, (1449), 462 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:57,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1449 transitions. [2021-06-12 20:00:57,990 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1449 transitions. Word has length 21 [2021-06-12 20:00:57,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:57,991 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1449 transitions. [2021-06-12 20:00:57,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:57,991 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1449 transitions. [2021-06-12 20:00:57,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:57,991 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:57,991 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:58,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2108,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:58,192 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:58,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:58,192 INFO L82 PathProgramCache]: Analyzing trace with hash 597402441, now seen corresponding path program 426 times [2021-06-12 20:00:58,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:58,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994148173] [2021-06-12 20:00:58,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:58,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:58,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:58,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994148173] [2021-06-12 20:00:58,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994148173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:58,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247185672] [2021-06-12 20:00:58,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:58,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:00:58,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:58,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:58,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:58,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:58,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:58,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:58,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:58,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:58,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:58,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:58,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:58,395 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:47, output treesize:31 [2021-06-12 20:00:58,426 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_0]} [2021-06-12 20:00:58,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:58,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:58,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:58,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:58,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:58,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:58,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:58,450 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:58,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:58,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:58,465 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:59, output treesize:19 [2021-06-12 20:00:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:58,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247185672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:58,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:58,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:58,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153801054] [2021-06-12 20:00:58,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:58,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:58,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:58,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:58,543 INFO L87 Difference]: Start difference. First operand 463 states and 1449 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:58,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:58,962 INFO L93 Difference]: Finished difference Result 748 states and 2272 transitions. [2021-06-12 20:00:58,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:00:58,963 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:58,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:58,964 INFO L225 Difference]: With dead ends: 748 [2021-06-12 20:00:58,964 INFO L226 Difference]: Without dead ends: 721 [2021-06-12 20:00:58,964 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 382.4ms TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:00:58,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-06-12 20:00:58,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 466. [2021-06-12 20:00:58,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.1462365591397847) internal successors, (1463), 465 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:58,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1463 transitions. [2021-06-12 20:00:58,969 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1463 transitions. Word has length 21 [2021-06-12 20:00:58,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:58,969 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1463 transitions. [2021-06-12 20:00:58,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:58,969 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1463 transitions. [2021-06-12 20:00:58,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:58,970 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:58,970 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:59,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2115 [2021-06-12 20:00:59,170 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:59,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:59,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1621875065, now seen corresponding path program 427 times [2021-06-12 20:00:59,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:59,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391378455] [2021-06-12 20:00:59,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:59,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:59,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391378455] [2021-06-12 20:00:59,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391378455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:59,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177465025] [2021-06-12 20:00:59,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:59,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:59,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:59,355 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[v_prenex_72]} [2021-06-12 20:00:59,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:00:59,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:59,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:59,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:59,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:59,388 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:36 [2021-06-12 20:00:59,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:59,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:59,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:59,457 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:59,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,464 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:10 [2021-06-12 20:00:59,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:59,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177465025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:59,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:59,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:00:59,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683715487] [2021-06-12 20:00:59,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:00:59,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:59,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:00:59,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:59,480 INFO L87 Difference]: Start difference. First operand 466 states and 1463 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:59,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:59,638 INFO L93 Difference]: Finished difference Result 562 states and 1726 transitions. [2021-06-12 20:00:59,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:00:59,638 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:00:59,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:59,639 INFO L225 Difference]: With dead ends: 562 [2021-06-12 20:00:59,639 INFO L226 Difference]: Without dead ends: 541 [2021-06-12 20:00:59,639 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 159.2ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:59,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-06-12 20:00:59,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 462. [2021-06-12 20:00:59,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.1366594360086766) internal successors, (1446), 461 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:59,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1446 transitions. [2021-06-12 20:00:59,645 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1446 transitions. Word has length 21 [2021-06-12 20:00:59,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:59,645 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1446 transitions. [2021-06-12 20:00:59,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:59,645 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1446 transitions. [2021-06-12 20:00:59,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:00:59,646 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:59,646 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:59,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2126,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:59,846 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:59,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:59,846 INFO L82 PathProgramCache]: Analyzing trace with hash -2013323637, now seen corresponding path program 428 times [2021-06-12 20:00:59,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:59,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189153138] [2021-06-12 20:00:59,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:59,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:59,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:59,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189153138] [2021-06-12 20:00:59,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189153138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:59,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88007477] [2021-06-12 20:00:59,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:59,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:59,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:59,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:00:59,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:00,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:00,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:00,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:00,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:00,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:30 [2021-06-12 20:01:00,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:00,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:00,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:01:00,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:00,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:01:00,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:00,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:00,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:00,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:01:00,077 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:00,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:00,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:00,092 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:21 [2021-06-12 20:01:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:00,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88007477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:00,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:00,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:01:00,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5922422] [2021-06-12 20:01:00,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:01:00,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:00,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:01:00,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:00,127 INFO L87 Difference]: Start difference. First operand 462 states and 1446 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:00,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:00,276 INFO L93 Difference]: Finished difference Result 559 states and 1726 transitions. [2021-06-12 20:01:00,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:00,276 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:00,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:00,277 INFO L225 Difference]: With dead ends: 559 [2021-06-12 20:01:00,277 INFO L226 Difference]: Without dead ends: 523 [2021-06-12 20:01:00,277 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 137.6ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:00,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-06-12 20:01:00,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 463. [2021-06-12 20:01:00,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.1406926406926408) internal successors, (1451), 462 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:00,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1451 transitions. [2021-06-12 20:01:00,282 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1451 transitions. Word has length 21 [2021-06-12 20:01:00,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:00,282 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1451 transitions. [2021-06-12 20:01:00,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:00,283 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1451 transitions. [2021-06-12 20:01:00,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:00,283 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:00,283 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:00,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2131,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:00,484 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:00,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:00,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1716057227, now seen corresponding path program 429 times [2021-06-12 20:01:00,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:00,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786743940] [2021-06-12 20:01:00,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:00,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:00,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:00,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786743940] [2021-06-12 20:01:00,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786743940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:00,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748279362] [2021-06-12 20:01:00,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:00,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:01:00,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:00,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:00,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:00,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:00,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:00,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:00,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:00,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:00,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:01:00,723 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:01:00,756 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_74, v_prenex_73], 1=[o_0, o_4]} [2021-06-12 20:01:00,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:00,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:00,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:00,772 INFO L518 ElimStorePlain]: Eliminatee v_prenex_73 vanished before elimination [2021-06-12 20:01:00,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:00,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:00,775 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:00,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:00,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:00,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:01:00,789 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:00,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:00,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:00,800 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:51, output treesize:19 [2021-06-12 20:01:00,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:00,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748279362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:00,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:00,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:00,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378499548] [2021-06-12 20:01:00,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:00,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:00,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:00,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:00,878 INFO L87 Difference]: Start difference. First operand 463 states and 1451 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:01,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:01,158 INFO L93 Difference]: Finished difference Result 674 states and 2069 transitions. [2021-06-12 20:01:01,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:01:01,158 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:01,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:01,159 INFO L225 Difference]: With dead ends: 674 [2021-06-12 20:01:01,159 INFO L226 Difference]: Without dead ends: 651 [2021-06-12 20:01:01,159 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 323.4ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:01:01,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-06-12 20:01:01,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 478. [2021-06-12 20:01:01,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.157232704402516) internal successors, (1506), 477 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:01,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1506 transitions. [2021-06-12 20:01:01,165 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1506 transitions. Word has length 21 [2021-06-12 20:01:01,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:01,165 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1506 transitions. [2021-06-12 20:01:01,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:01,165 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1506 transitions. [2021-06-12 20:01:01,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:01,166 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:01,166 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:01,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2135 [2021-06-12 20:01:01,366 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:01,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:01,366 INFO L82 PathProgramCache]: Analyzing trace with hash -2000319911, now seen corresponding path program 430 times [2021-06-12 20:01:01,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:01,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575994082] [2021-06-12 20:01:01,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:01,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:01,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:01,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:01,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575994082] [2021-06-12 20:01:01,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575994082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:01,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243088154] [2021-06-12 20:01:01,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:01,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:01,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:01,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:01,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:01,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:01,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:01,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:01,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:01,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:01,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:01:01,565 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:01:01,599 INFO L446 ElimStorePlain]: Different costs {0=[o_0, o_4], 1=[v_prenex_76, v_prenex_75]} [2021-06-12 20:01:01,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:01,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:01,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:01,614 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:01,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:01,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:01,617 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:01,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:01,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:01,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:01:01,631 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:01,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:01,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:01,647 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:51, output treesize:19 [2021-06-12 20:01:01,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:01,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243088154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:01,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:01,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:01,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299955030] [2021-06-12 20:01:01,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:01,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:01,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:01,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:01,724 INFO L87 Difference]: Start difference. First operand 478 states and 1506 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:02,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:02,063 INFO L93 Difference]: Finished difference Result 679 states and 2090 transitions. [2021-06-12 20:01:02,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:01:02,063 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:02,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:02,064 INFO L225 Difference]: With dead ends: 679 [2021-06-12 20:01:02,064 INFO L226 Difference]: Without dead ends: 652 [2021-06-12 20:01:02,064 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 319.0ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:01:02,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-12 20:01:02,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 484. [2021-06-12 20:01:02,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.1552795031055902) internal successors, (1524), 483 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:02,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1524 transitions. [2021-06-12 20:01:02,073 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1524 transitions. Word has length 21 [2021-06-12 20:01:02,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:02,073 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1524 transitions. [2021-06-12 20:01:02,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:02,073 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1524 transitions. [2021-06-12 20:01:02,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:02,074 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:02,074 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:02,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2144 [2021-06-12 20:01:02,299 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:02,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:02,299 INFO L82 PathProgramCache]: Analyzing trace with hash 333900419, now seen corresponding path program 431 times [2021-06-12 20:01:02,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:02,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306016894] [2021-06-12 20:01:02,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:02,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:02,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306016894] [2021-06-12 20:01:02,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306016894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:02,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555837211] [2021-06-12 20:01:02,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:02,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:01:02,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:02,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:01:02,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:02,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:02,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:02,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:02,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:02,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:02,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:01:02,485 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:01:02,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:02,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:02,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:02,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:02,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:02,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:02,543 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:02,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:02,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:02,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:02,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:01:02,569 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:02,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:02,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:01:02,572 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:02,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:02,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:02,594 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:31 [2021-06-12 20:01:02,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:02,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555837211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:02,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:02,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:02,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614474925] [2021-06-12 20:01:02,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:02,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:02,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:02,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:02,672 INFO L87 Difference]: Start difference. First operand 484 states and 1524 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:02,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:02,886 INFO L93 Difference]: Finished difference Result 565 states and 1744 transitions. [2021-06-12 20:01:02,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:02,886 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:02,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:02,887 INFO L225 Difference]: With dead ends: 565 [2021-06-12 20:01:02,887 INFO L226 Difference]: Without dead ends: 546 [2021-06-12 20:01:02,887 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 230.8ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:01:02,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-12 20:01:02,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 468. [2021-06-12 20:01:02,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.147751605995717) internal successors, (1470), 467 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:02,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1470 transitions. [2021-06-12 20:01:02,893 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1470 transitions. Word has length 21 [2021-06-12 20:01:02,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:02,893 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1470 transitions. [2021-06-12 20:01:02,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:02,893 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1470 transitions. [2021-06-12 20:01:02,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:02,893 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:02,893 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:03,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2156 [2021-06-12 20:01:03,094 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:03,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:03,094 INFO L82 PathProgramCache]: Analyzing trace with hash 879273073, now seen corresponding path program 432 times [2021-06-12 20:01:03,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:03,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635893104] [2021-06-12 20:01:03,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:03,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:03,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:03,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635893104] [2021-06-12 20:01:03,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635893104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:03,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465508296] [2021-06-12 20:01:03,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:03,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:01:03,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:03,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:03,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:03,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:03,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:03,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:03,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:03,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:03,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:01:03,314 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:01:03,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:03,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:03,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:03,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:03,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:03,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:01:03,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:03,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:03,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:03,423 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:28, output treesize:7 [2021-06-12 20:01:03,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:03,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465508296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:03,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:03,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:01:03,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809830158] [2021-06-12 20:01:03,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:01:03,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:03,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:01:03,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:03,434 INFO L87 Difference]: Start difference. First operand 468 states and 1470 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:03,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:03,609 INFO L93 Difference]: Finished difference Result 574 states and 1763 transitions. [2021-06-12 20:01:03,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:03,609 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:03,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:03,610 INFO L225 Difference]: With dead ends: 574 [2021-06-12 20:01:03,610 INFO L226 Difference]: Without dead ends: 553 [2021-06-12 20:01:03,610 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 200.6ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:03,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-12 20:01:03,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 468. [2021-06-12 20:01:03,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.1563169164882225) internal successors, (1474), 467 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:03,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1474 transitions. [2021-06-12 20:01:03,615 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1474 transitions. Word has length 21 [2021-06-12 20:01:03,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:03,616 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1474 transitions. [2021-06-12 20:01:03,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:03,616 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1474 transitions. [2021-06-12 20:01:03,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:03,616 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:03,616 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:03,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2163,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:03,817 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:03,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:03,817 INFO L82 PathProgramCache]: Analyzing trace with hash -839711609, now seen corresponding path program 433 times [2021-06-12 20:01:03,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:03,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125852412] [2021-06-12 20:01:03,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:03,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:03,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:03,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125852412] [2021-06-12 20:01:03,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125852412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:03,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865794742] [2021-06-12 20:01:03,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:03,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:03,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:03,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:04,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:04,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:04,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:04,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:01:04,032 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:01:04,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:04,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:04,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:01:04,105 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:04,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,111 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:10 [2021-06-12 20:01:04,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:04,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865794742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:04,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:04,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:01:04,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557905726] [2021-06-12 20:01:04,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:01:04,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:04,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:01:04,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:04,126 INFO L87 Difference]: Start difference. First operand 468 states and 1474 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:04,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:04,246 INFO L93 Difference]: Finished difference Result 574 states and 1763 transitions. [2021-06-12 20:01:04,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:04,246 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:04,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:04,247 INFO L225 Difference]: With dead ends: 574 [2021-06-12 20:01:04,247 INFO L226 Difference]: Without dead ends: 553 [2021-06-12 20:01:04,247 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 166.4ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:04,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-12 20:01:04,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 464. [2021-06-12 20:01:04,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.146868250539957) internal successors, (1457), 463 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:04,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1457 transitions. [2021-06-12 20:01:04,256 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1457 transitions. Word has length 21 [2021-06-12 20:01:04,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:04,256 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1457 transitions. [2021-06-12 20:01:04,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:04,256 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1457 transitions. [2021-06-12 20:01:04,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:04,257 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:04,257 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:04,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2173,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:04,457 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:04,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:04,458 INFO L82 PathProgramCache]: Analyzing trace with hash 556675569, now seen corresponding path program 434 times [2021-06-12 20:01:04,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:04,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215165299] [2021-06-12 20:01:04,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:04,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:04,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:04,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215165299] [2021-06-12 20:01:04,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215165299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:04,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849762055] [2021-06-12 20:01:04,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:04,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:04,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:04,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:04,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:04,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:04,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:04,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:19 [2021-06-12 20:01:04,707 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_0]} [2021-06-12 20:01:04,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:04,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:04,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:01:04,717 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:04,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,722 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:7 [2021-06-12 20:01:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:04,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849762055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:04,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:04,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:04,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584969189] [2021-06-12 20:01:04,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:04,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:04,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:04,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:04,753 INFO L87 Difference]: Start difference. First operand 464 states and 1457 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:05,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:05,104 INFO L93 Difference]: Finished difference Result 658 states and 2022 transitions. [2021-06-12 20:01:05,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:01:05,104 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:05,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:05,105 INFO L225 Difference]: With dead ends: 658 [2021-06-12 20:01:05,105 INFO L226 Difference]: Without dead ends: 637 [2021-06-12 20:01:05,106 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 333.6ms TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:01:05,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-06-12 20:01:05,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 466. [2021-06-12 20:01:05,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.1440860215053763) internal successors, (1462), 465 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:05,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1462 transitions. [2021-06-12 20:01:05,111 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1462 transitions. Word has length 21 [2021-06-12 20:01:05,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:05,111 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1462 transitions. [2021-06-12 20:01:05,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:05,111 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1462 transitions. [2021-06-12 20:01:05,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:05,111 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:05,111 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:05,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2177 [2021-06-12 20:01:05,312 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:05,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:05,312 INFO L82 PathProgramCache]: Analyzing trace with hash -773252593, now seen corresponding path program 435 times [2021-06-12 20:01:05,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:05,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338221262] [2021-06-12 20:01:05,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:05,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:05,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:05,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:05,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338221262] [2021-06-12 20:01:05,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338221262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:05,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777085605] [2021-06-12 20:01:05,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:05,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:01:05,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:05,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:05,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:05,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:05,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:05,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:05,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:05,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:05,531 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-06-12 20:01:05,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:05,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:05,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:05,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:05,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:05,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:01:05,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:05,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:05,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:05,576 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:10 [2021-06-12 20:01:05,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:05,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777085605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:05,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:05,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:01:05,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236779789] [2021-06-12 20:01:05,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:01:05,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:05,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:01:05,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:05,591 INFO L87 Difference]: Start difference. First operand 466 states and 1462 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:05,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:05,708 INFO L93 Difference]: Finished difference Result 555 states and 1712 transitions. [2021-06-12 20:01:05,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:05,709 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:05,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:05,709 INFO L225 Difference]: With dead ends: 555 [2021-06-12 20:01:05,709 INFO L226 Difference]: Without dead ends: 534 [2021-06-12 20:01:05,710 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 158.8ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:05,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-12 20:01:05,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 463. [2021-06-12 20:01:05,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.1385281385281387) internal successors, (1450), 462 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:05,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1450 transitions. [2021-06-12 20:01:05,714 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1450 transitions. Word has length 21 [2021-06-12 20:01:05,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:05,714 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1450 transitions. [2021-06-12 20:01:05,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:05,715 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1450 transitions. [2021-06-12 20:01:05,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:05,715 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:05,715 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:05,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2179,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:05,916 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:05,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:05,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1688334081, now seen corresponding path program 436 times [2021-06-12 20:01:05,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:05,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836756898] [2021-06-12 20:01:05,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:05,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:06,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:06,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:06,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836756898] [2021-06-12 20:01:06,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836756898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:06,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994370831] [2021-06-12 20:01:06,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:06,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:06,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:06,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:06,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:06,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:06,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:06,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:06,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-06-12 20:01:06,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:06,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:06,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:01:06,143 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:06,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,151 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:10 [2021-06-12 20:01:06,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:06,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994370831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:06,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:06,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:06,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137446307] [2021-06-12 20:01:06,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:06,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:06,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:06,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:06,208 INFO L87 Difference]: Start difference. First operand 463 states and 1450 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:06,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:06,524 INFO L93 Difference]: Finished difference Result 620 states and 1898 transitions. [2021-06-12 20:01:06,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:01:06,524 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:06,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:06,525 INFO L225 Difference]: With dead ends: 620 [2021-06-12 20:01:06,525 INFO L226 Difference]: Without dead ends: 599 [2021-06-12 20:01:06,525 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 276.5ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:01:06,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-06-12 20:01:06,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 442. [2021-06-12 20:01:06,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.120181405895692) internal successors, (1376), 441 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:06,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1376 transitions. [2021-06-12 20:01:06,531 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1376 transitions. Word has length 21 [2021-06-12 20:01:06,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:06,531 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1376 transitions. [2021-06-12 20:01:06,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:06,531 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1376 transitions. [2021-06-12 20:01:06,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:06,531 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:06,532 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:06,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2182,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:06,745 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:06,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:06,745 INFO L82 PathProgramCache]: Analyzing trace with hash 2051605755, now seen corresponding path program 437 times [2021-06-12 20:01:06,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:06,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087385795] [2021-06-12 20:01:06,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:06,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:06,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087385795] [2021-06-12 20:01:06,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087385795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:06,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257790777] [2021-06-12 20:01:06,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:06,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:01:06,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:06,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:06,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:06,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:06,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:06,905 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:06,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:06,914 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:01:06,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:06,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:06,970 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:06,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:01:06,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:06,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257790777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:06,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:06,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:01:06,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509936585] [2021-06-12 20:01:06,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:01:06,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:06,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:01:06,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:06,979 INFO L87 Difference]: Start difference. First operand 442 states and 1376 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:07,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:07,198 INFO L93 Difference]: Finished difference Result 578 states and 1779 transitions. [2021-06-12 20:01:07,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:07,198 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:07,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:07,199 INFO L225 Difference]: With dead ends: 578 [2021-06-12 20:01:07,199 INFO L226 Difference]: Without dead ends: 556 [2021-06-12 20:01:07,199 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:07,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-12 20:01:07,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 460. [2021-06-12 20:01:07,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.130718954248366) internal successors, (1437), 459 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:07,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1437 transitions. [2021-06-12 20:01:07,204 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1437 transitions. Word has length 21 [2021-06-12 20:01:07,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:07,204 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1437 transitions. [2021-06-12 20:01:07,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:07,204 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1437 transitions. [2021-06-12 20:01:07,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:07,205 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:07,205 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:07,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2184,438 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:07,405 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:07,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:07,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1549814419, now seen corresponding path program 438 times [2021-06-12 20:01:07,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:07,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299921690] [2021-06-12 20:01:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:07,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:07,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299921690] [2021-06-12 20:01:07,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299921690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:07,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229033791] [2021-06-12 20:01:07,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:07,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:01:07,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:07,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:07,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:07,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:07,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:07,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:07,547 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:07,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:07,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:07,556 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:01:07,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:07,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:07,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:07,597 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:07,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:07,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:01:07,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:07,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229033791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:07,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:07,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:01:07,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921749104] [2021-06-12 20:01:07,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:01:07,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:07,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:01:07,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:01:07,611 INFO L87 Difference]: Start difference. First operand 460 states and 1437 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:07,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:07,806 INFO L93 Difference]: Finished difference Result 587 states and 1803 transitions. [2021-06-12 20:01:07,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:07,806 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:07,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:07,807 INFO L225 Difference]: With dead ends: 587 [2021-06-12 20:01:07,807 INFO L226 Difference]: Without dead ends: 565 [2021-06-12 20:01:07,807 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 141.5ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:07,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-12 20:01:07,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 457. [2021-06-12 20:01:07,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 3.125) internal successors, (1425), 456 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:07,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1425 transitions. [2021-06-12 20:01:07,812 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1425 transitions. Word has length 21 [2021-06-12 20:01:07,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:07,812 INFO L482 AbstractCegarLoop]: Abstraction has 457 states and 1425 transitions. [2021-06-12 20:01:07,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:07,813 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1425 transitions. [2021-06-12 20:01:07,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:07,813 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:07,813 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:08,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2187,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:08,014 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:08,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:08,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1618037423, now seen corresponding path program 439 times [2021-06-12 20:01:08,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:08,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170007809] [2021-06-12 20:01:08,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:08,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:08,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:08,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170007809] [2021-06-12 20:01:08,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170007809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:08,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222842103] [2021-06-12 20:01:08,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:08,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:08,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:08,227 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_77], 1=[o_0]} [2021-06-12 20:01:08,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:08,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:08,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:08,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:08,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:08,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:08,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:08,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:01:08,261 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:50, output treesize:34 [2021-06-12 20:01:08,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:08,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:08,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:08,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:08,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:08,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:01:08,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:08,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:08,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:08,380 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:33, output treesize:7 [2021-06-12 20:01:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:08,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222842103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:08,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:08,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:08,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950610558] [2021-06-12 20:01:08,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:08,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:08,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:08,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:08,408 INFO L87 Difference]: Start difference. First operand 457 states and 1425 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:08,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:08,954 INFO L93 Difference]: Finished difference Result 722 states and 2222 transitions. [2021-06-12 20:01:08,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:01:08,954 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:08,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:08,955 INFO L225 Difference]: With dead ends: 722 [2021-06-12 20:01:08,955 INFO L226 Difference]: Without dead ends: 703 [2021-06-12 20:01:08,955 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 496.9ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:01:08,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-06-12 20:01:08,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 469. [2021-06-12 20:01:08,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.1452991452991452) internal successors, (1472), 468 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:08,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1472 transitions. [2021-06-12 20:01:08,961 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1472 transitions. Word has length 21 [2021-06-12 20:01:08,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:08,961 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1472 transitions. [2021-06-12 20:01:08,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:08,961 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1472 transitions. [2021-06-12 20:01:08,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:08,961 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:08,961 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:09,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2190,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:09,162 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:09,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:09,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1840246035, now seen corresponding path program 440 times [2021-06-12 20:01:09,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:09,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970018055] [2021-06-12 20:01:09,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:09,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:09,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970018055] [2021-06-12 20:01:09,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970018055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:09,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881735215] [2021-06-12 20:01:09,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:09,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:09,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:09,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:09,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:09,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:09,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:09,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:09,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:09,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 20:01:09,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:09,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:09,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:01:09,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:09,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:09,349 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:09,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:09,350 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:5 [2021-06-12 20:01:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:09,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881735215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:09,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:09,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:01:09,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294576903] [2021-06-12 20:01:09,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:01:09,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:09,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:01:09,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:09,358 INFO L87 Difference]: Start difference. First operand 469 states and 1472 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:09,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:09,516 INFO L93 Difference]: Finished difference Result 601 states and 1857 transitions. [2021-06-12 20:01:09,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:09,516 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:09,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:09,517 INFO L225 Difference]: With dead ends: 601 [2021-06-12 20:01:09,517 INFO L226 Difference]: Without dead ends: 568 [2021-06-12 20:01:09,517 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:09,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-06-12 20:01:09,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 469. [2021-06-12 20:01:09,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.1346153846153846) internal successors, (1467), 468 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:09,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1467 transitions. [2021-06-12 20:01:09,522 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1467 transitions. Word has length 21 [2021-06-12 20:01:09,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:09,522 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1467 transitions. [2021-06-12 20:01:09,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:09,522 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1467 transitions. [2021-06-12 20:01:09,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:09,523 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:09,523 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:09,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2198,441 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:09,724 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:09,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:09,724 INFO L82 PathProgramCache]: Analyzing trace with hash 68354417, now seen corresponding path program 441 times [2021-06-12 20:01:09,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:09,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516655421] [2021-06-12 20:01:09,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:09,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:09,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516655421] [2021-06-12 20:01:09,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516655421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:09,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663411960] [2021-06-12 20:01:09,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:09,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:01:09,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:09,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:09,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:09,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:09,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:09,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:09,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:09,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:09,944 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:09,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:09,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:09,956 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:47, output treesize:31 [2021-06-12 20:01:10,018 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_4]} [2021-06-12 20:01:10,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:10,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:10,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:10,024 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:10,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:10,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:10,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:01:10,039 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:10,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:10,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:10,051 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:13 [2021-06-12 20:01:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:10,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663411960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:10,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:10,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:10,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278322297] [2021-06-12 20:01:10,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:10,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:10,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:10,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:10,098 INFO L87 Difference]: Start difference. First operand 469 states and 1467 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:10,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:10,497 INFO L93 Difference]: Finished difference Result 825 states and 2516 transitions. [2021-06-12 20:01:10,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:01:10,498 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:10,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:10,499 INFO L225 Difference]: With dead ends: 825 [2021-06-12 20:01:10,499 INFO L226 Difference]: Without dead ends: 802 [2021-06-12 20:01:10,499 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 349.1ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:01:10,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-06-12 20:01:10,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 475. [2021-06-12 20:01:10,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.130801687763713) internal successors, (1484), 474 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:10,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1484 transitions. [2021-06-12 20:01:10,505 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1484 transitions. Word has length 21 [2021-06-12 20:01:10,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:10,505 INFO L482 AbstractCegarLoop]: Abstraction has 475 states and 1484 transitions. [2021-06-12 20:01:10,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:10,505 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1484 transitions. [2021-06-12 20:01:10,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:10,506 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:10,506 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:10,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2201,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:10,706 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:10,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:10,707 INFO L82 PathProgramCache]: Analyzing trace with hash -215908267, now seen corresponding path program 442 times [2021-06-12 20:01:10,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:10,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526658070] [2021-06-12 20:01:10,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:10,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:10,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:10,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526658070] [2021-06-12 20:01:10,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526658070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:10,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806613976] [2021-06-12 20:01:10,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:10,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:10,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:10,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:10,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:10,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:10,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:10,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:10,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:10,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 20:01:10,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:10,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:10,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:01:10,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:10,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:10,905 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:10,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:10,906 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:01:10,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:10,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806613976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:10,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:10,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:01:10,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739368951] [2021-06-12 20:01:10,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:10,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:10,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:10,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:10,955 INFO L87 Difference]: Start difference. First operand 475 states and 1484 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:11,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:11,419 INFO L93 Difference]: Finished difference Result 698 states and 2154 transitions. [2021-06-12 20:01:11,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:01:11,419 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:11,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:11,421 INFO L225 Difference]: With dead ends: 698 [2021-06-12 20:01:11,421 INFO L226 Difference]: Without dead ends: 671 [2021-06-12 20:01:11,421 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 311.2ms TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:01:11,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-06-12 20:01:11,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 473. [2021-06-12 20:01:11,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.1334745762711864) internal successors, (1479), 472 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:11,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1479 transitions. [2021-06-12 20:01:11,426 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1479 transitions. Word has length 21 [2021-06-12 20:01:11,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:11,426 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1479 transitions. [2021-06-12 20:01:11,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:11,427 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1479 transitions. [2021-06-12 20:01:11,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:11,427 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:11,427 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:11,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2209,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:11,628 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:11,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:11,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1929773965, now seen corresponding path program 443 times [2021-06-12 20:01:11,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:11,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840169276] [2021-06-12 20:01:11,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:11,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:11,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:11,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:11,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840169276] [2021-06-12 20:01:11,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840169276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:11,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666460014] [2021-06-12 20:01:11,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:11,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:11,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:11,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:01:11,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:11,875 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_78], 1=[o_0]} [2021-06-12 20:01:11,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:11,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:11,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:11,884 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:11,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:11,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:11,939 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:11,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:11,943 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:11,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:11,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-06-12 20:01:11,994 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:119, output treesize:87 [2021-06-12 20:01:12,152 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-06-12 20:01:12,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:12,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:12,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:12,159 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:12,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:12,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:01:12,187 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:12,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:01:12,192 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:12,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:12,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:12,216 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:83, output treesize:31 [2021-06-12 20:01:12,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:12,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666460014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:12,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:12,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:12,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078406303] [2021-06-12 20:01:12,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:12,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:12,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:12,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:12,291 INFO L87 Difference]: Start difference. First operand 473 states and 1479 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:12,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:12,940 INFO L93 Difference]: Finished difference Result 743 states and 2292 transitions. [2021-06-12 20:01:12,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:01:12,940 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:12,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:12,941 INFO L225 Difference]: With dead ends: 743 [2021-06-12 20:01:12,941 INFO L226 Difference]: Without dead ends: 724 [2021-06-12 20:01:12,941 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 669.7ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:01:12,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-06-12 20:01:12,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 469. [2021-06-12 20:01:12,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.126068376068376) internal successors, (1463), 468 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:12,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1463 transitions. [2021-06-12 20:01:12,947 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1463 transitions. Word has length 21 [2021-06-12 20:01:12,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:12,947 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1463 transitions. [2021-06-12 20:01:12,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:12,947 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1463 transitions. [2021-06-12 20:01:12,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:12,948 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:12,948 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:13,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2215 [2021-06-12 20:01:13,148 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:13,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:13,149 INFO L82 PathProgramCache]: Analyzing trace with hash 636231443, now seen corresponding path program 444 times [2021-06-12 20:01:13,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:13,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837422771] [2021-06-12 20:01:13,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:13,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:13,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837422771] [2021-06-12 20:01:13,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837422771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:13,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950542084] [2021-06-12 20:01:13,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:13,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:01:13,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:13,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:13,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:13,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:13,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:13,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:13,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:13,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:13,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:13,304 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:01:13,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:13,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:13,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:13,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:13,366 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:13,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:13,372 INFO L518 ElimStorePlain]: Eliminatee v_prenex_80 vanished before elimination [2021-06-12 20:01:13,372 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:13,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:13,372 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:15 [2021-06-12 20:01:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:13,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950542084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:13,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:13,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:01:13,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445383062] [2021-06-12 20:01:13,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:01:13,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:13,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:01:13,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:13,398 INFO L87 Difference]: Start difference. First operand 469 states and 1463 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:13,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:13,600 INFO L93 Difference]: Finished difference Result 635 states and 1959 transitions. [2021-06-12 20:01:13,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:13,600 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:13,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:13,601 INFO L225 Difference]: With dead ends: 635 [2021-06-12 20:01:13,601 INFO L226 Difference]: Without dead ends: 606 [2021-06-12 20:01:13,601 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 149.7ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:13,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-06-12 20:01:13,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 469. [2021-06-12 20:01:13,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.126068376068376) internal successors, (1463), 468 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:13,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1463 transitions. [2021-06-12 20:01:13,606 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1463 transitions. Word has length 21 [2021-06-12 20:01:13,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:13,607 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1463 transitions. [2021-06-12 20:01:13,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:13,607 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1463 transitions. [2021-06-12 20:01:13,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:13,607 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:13,607 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:13,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2225 [2021-06-12 20:01:13,808 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:13,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:13,808 INFO L82 PathProgramCache]: Analyzing trace with hash -458467475, now seen corresponding path program 445 times [2021-06-12 20:01:13,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:13,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915505613] [2021-06-12 20:01:13,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:13,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:13,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:13,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:13,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915505613] [2021-06-12 20:01:13,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915505613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:13,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137595173] [2021-06-12 20:01:13,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:13,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:13,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:13,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:13,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:13,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:13,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:13,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 20:01:13,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:13,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:13,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:01:13,987 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:13,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:13,993 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:13,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:13,993 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:01:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:14,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137595173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:14,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:14,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:01:14,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501328974] [2021-06-12 20:01:14,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:01:14,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:14,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:01:14,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:01:14,012 INFO L87 Difference]: Start difference. First operand 469 states and 1463 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:14,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:14,212 INFO L93 Difference]: Finished difference Result 598 states and 1842 transitions. [2021-06-12 20:01:14,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:14,213 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:14,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:14,214 INFO L225 Difference]: With dead ends: 598 [2021-06-12 20:01:14,214 INFO L226 Difference]: Without dead ends: 571 [2021-06-12 20:01:14,214 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 122.5ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:14,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-12 20:01:14,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 466. [2021-06-12 20:01:14,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.129032258064516) internal successors, (1455), 465 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:14,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1455 transitions. [2021-06-12 20:01:14,220 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1455 transitions. Word has length 21 [2021-06-12 20:01:14,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:14,220 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1455 transitions. [2021-06-12 20:01:14,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:14,220 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1455 transitions. [2021-06-12 20:01:14,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:14,221 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:14,221 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:14,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 446 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2233 [2021-06-12 20:01:14,421 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:14,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:14,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1082753239, now seen corresponding path program 446 times [2021-06-12 20:01:14,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:14,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688251234] [2021-06-12 20:01:14,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:14,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:14,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:14,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688251234] [2021-06-12 20:01:14,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688251234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:14,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258909420] [2021-06-12 20:01:14,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:14,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:14,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:14,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:14,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:14,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:14,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:14,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:14,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:14,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:14,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:14,581 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:01:14,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:14,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:14,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:14,619 INFO L518 ElimStorePlain]: Eliminatee v_prenex_82 vanished before elimination [2021-06-12 20:01:14,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:14,622 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:14,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:14,630 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:14,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:14,631 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:21 [2021-06-12 20:01:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:14,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258909420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:14,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:14,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:01:14,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761803964] [2021-06-12 20:01:14,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:01:14,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:14,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:01:14,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:01:14,665 INFO L87 Difference]: Start difference. First operand 466 states and 1455 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:14,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:14,852 INFO L93 Difference]: Finished difference Result 638 states and 1967 transitions. [2021-06-12 20:01:14,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:14,853 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:14,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:14,854 INFO L225 Difference]: With dead ends: 638 [2021-06-12 20:01:14,854 INFO L226 Difference]: Without dead ends: 609 [2021-06-12 20:01:14,854 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 145.1ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:14,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-06-12 20:01:14,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 466. [2021-06-12 20:01:14,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.129032258064516) internal successors, (1455), 465 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:14,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1455 transitions. [2021-06-12 20:01:14,859 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1455 transitions. Word has length 21 [2021-06-12 20:01:14,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:14,859 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1455 transitions. [2021-06-12 20:01:14,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:14,859 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1455 transitions. [2021-06-12 20:01:14,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:14,860 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:14,860 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:15,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2237 [2021-06-12 20:01:15,060 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:15,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:15,060 INFO L82 PathProgramCache]: Analyzing trace with hash -785486829, now seen corresponding path program 447 times [2021-06-12 20:01:15,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:15,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383252779] [2021-06-12 20:01:15,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:15,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:15,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383252779] [2021-06-12 20:01:15,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383252779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:15,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069445316] [2021-06-12 20:01:15,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:15,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:01:15,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:15,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:15,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:15,267 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_84], 1=[o_0]} [2021-06-12 20:01:15,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:15,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:15,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:15,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:15,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:15,287 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:15,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:15,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:01:15,300 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:50, output treesize:34 [2021-06-12 20:01:15,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:15,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:15,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:15,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:15,353 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:15,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:15,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:15,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:01:15,371 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:15,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:15,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:15,387 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:62, output treesize:19 [2021-06-12 20:01:15,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:15,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069445316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:15,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:15,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:01:15,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652135053] [2021-06-12 20:01:15,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:01:15,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:15,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:01:15,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:15,432 INFO L87 Difference]: Start difference. First operand 466 states and 1455 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:15,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:15,650 INFO L93 Difference]: Finished difference Result 710 states and 2170 transitions. [2021-06-12 20:01:15,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:15,651 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:15,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:15,652 INFO L225 Difference]: With dead ends: 710 [2021-06-12 20:01:15,652 INFO L226 Difference]: Without dead ends: 687 [2021-06-12 20:01:15,652 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 241.0ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:15,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-06-12 20:01:15,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 470. [2021-06-12 20:01:15,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.1471215351812365) internal successors, (1476), 469 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:15,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1476 transitions. [2021-06-12 20:01:15,658 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1476 transitions. Word has length 21 [2021-06-12 20:01:15,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:15,658 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1476 transitions. [2021-06-12 20:01:15,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:15,658 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1476 transitions. [2021-06-12 20:01:15,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:15,659 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:15,659 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:15,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2242,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:15,859 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:15,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:15,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1069749513, now seen corresponding path program 448 times [2021-06-12 20:01:15,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:15,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3729959] [2021-06-12 20:01:15,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:15,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:15,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3729959] [2021-06-12 20:01:15,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3729959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:15,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871480620] [2021-06-12 20:01:15,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:15,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:15,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:15,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:15,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:16,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:16,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:16,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:16,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:16,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 20:01:16,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:01:16,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:16,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:16,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:16,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:16,045 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:16,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:16,046 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:45, output treesize:19 [2021-06-12 20:01:16,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:16,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871480620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:16,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:16,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:01:16,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4258321] [2021-06-12 20:01:16,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:16,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:16,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:16,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:16,120 INFO L87 Difference]: Start difference. First operand 470 states and 1476 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:16,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:16,622 INFO L93 Difference]: Finished difference Result 717 states and 2203 transitions. [2021-06-12 20:01:16,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:01:16,623 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:16,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:16,624 INFO L225 Difference]: With dead ends: 717 [2021-06-12 20:01:16,624 INFO L226 Difference]: Without dead ends: 690 [2021-06-12 20:01:16,624 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 375.9ms TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:01:16,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-06-12 20:01:16,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 468. [2021-06-12 20:01:16,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.137044967880086) internal successors, (1465), 467 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:16,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1465 transitions. [2021-06-12 20:01:16,629 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1465 transitions. Word has length 21 [2021-06-12 20:01:16,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:16,629 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1465 transitions. [2021-06-12 20:01:16,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:16,629 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1465 transitions. [2021-06-12 20:01:16,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:16,630 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:16,630 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:16,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2252,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:16,830 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:16,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:16,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1801107459, now seen corresponding path program 449 times [2021-06-12 20:01:16,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:16,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690100150] [2021-06-12 20:01:16,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:16,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:16,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:16,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690100150] [2021-06-12 20:01:16,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690100150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:16,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640248407] [2021-06-12 20:01:16,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:16,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:01:16,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:16,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:01:16,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:17,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:17,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:17,040 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:17,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:01:17,068 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-06-12 20:01:17,264 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-06-12 20:01:17,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:17,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 20:01:17,272 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:17,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-12 20:01:17,294 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:01:17,296 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:17,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:17,314 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:77, output treesize:21 [2021-06-12 20:01:17,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:17,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640248407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:17,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:17,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:17,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21454147] [2021-06-12 20:01:17,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:17,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:17,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:17,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:17,361 INFO L87 Difference]: Start difference. First operand 468 states and 1465 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:17,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:17,720 INFO L93 Difference]: Finished difference Result 634 states and 1954 transitions. [2021-06-12 20:01:17,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:01:17,720 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:17,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:17,721 INFO L225 Difference]: With dead ends: 634 [2021-06-12 20:01:17,721 INFO L226 Difference]: Without dead ends: 615 [2021-06-12 20:01:17,722 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 431.1ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:01:17,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-06-12 20:01:17,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 476. [2021-06-12 20:01:17,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.143157894736842) internal successors, (1493), 475 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:17,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1493 transitions. [2021-06-12 20:01:17,727 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1493 transitions. Word has length 21 [2021-06-12 20:01:17,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:17,727 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1493 transitions. [2021-06-12 20:01:17,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:17,727 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1493 transitions. [2021-06-12 20:01:17,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:17,728 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:17,728 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:17,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2261,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:17,928 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:17,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:17,929 INFO L82 PathProgramCache]: Analyzing trace with hash -232529021, now seen corresponding path program 450 times [2021-06-12 20:01:17,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:17,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008133599] [2021-06-12 20:01:17,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:18,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:18,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:18,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008133599] [2021-06-12 20:01:18,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008133599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:18,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122047708] [2021-06-12 20:01:18,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:18,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:01:18,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:18,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:18,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:18,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:18,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:18,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:18,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:18,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:18,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2021-06-12 20:01:18,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:18,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:18,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:18,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:18,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:18,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:01:18,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:18,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:18,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:18,216 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:10 [2021-06-12 20:01:18,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:18,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122047708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:18,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:18,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:18,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173506384] [2021-06-12 20:01:18,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:18,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:18,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:18,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:18,259 INFO L87 Difference]: Start difference. First operand 476 states and 1493 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:18,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:18,681 INFO L93 Difference]: Finished difference Result 739 states and 2280 transitions. [2021-06-12 20:01:18,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:01:18,682 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:18,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:18,683 INFO L225 Difference]: With dead ends: 739 [2021-06-12 20:01:18,683 INFO L226 Difference]: Without dead ends: 720 [2021-06-12 20:01:18,683 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 404.8ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:01:18,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-06-12 20:01:18,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 472. [2021-06-12 20:01:18,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.1358811040339702) internal successors, (1477), 471 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:18,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1477 transitions. [2021-06-12 20:01:18,689 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1477 transitions. Word has length 21 [2021-06-12 20:01:18,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:18,689 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1477 transitions. [2021-06-12 20:01:18,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:18,689 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1477 transitions. [2021-06-12 20:01:18,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:18,689 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:18,689 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:18,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2275,451 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:18,890 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:18,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:18,890 INFO L82 PathProgramCache]: Analyzing trace with hash 385733147, now seen corresponding path program 451 times [2021-06-12 20:01:18,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:18,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404002190] [2021-06-12 20:01:18,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:18,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:18,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:18,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404002190] [2021-06-12 20:01:18,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404002190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:18,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755383680] [2021-06-12 20:01:18,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:19,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:19,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:19,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:19,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:19,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:19,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:19,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:01:19,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:19,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:19,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:19,072 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:19,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:19,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:01:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:19,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755383680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:19,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:19,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:01:19,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370954913] [2021-06-12 20:01:19,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:01:19,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:19,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:01:19,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:01:19,086 INFO L87 Difference]: Start difference. First operand 472 states and 1477 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:19,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:19,221 INFO L93 Difference]: Finished difference Result 602 states and 1862 transitions. [2021-06-12 20:01:19,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:19,221 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:19,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:19,222 INFO L225 Difference]: With dead ends: 602 [2021-06-12 20:01:19,222 INFO L226 Difference]: Without dead ends: 583 [2021-06-12 20:01:19,222 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:01:19,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-06-12 20:01:19,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 468. [2021-06-12 20:01:19,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.137044967880086) internal successors, (1465), 467 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:19,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1465 transitions. [2021-06-12 20:01:19,229 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1465 transitions. Word has length 21 [2021-06-12 20:01:19,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:19,229 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1465 transitions. [2021-06-12 20:01:19,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:19,229 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1465 transitions. [2021-06-12 20:01:19,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:19,230 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:19,230 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:19,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2278 [2021-06-12 20:01:19,445 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:19,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:19,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1672477829, now seen corresponding path program 452 times [2021-06-12 20:01:19,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:19,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102648382] [2021-06-12 20:01:19,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:19,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:19,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:19,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102648382] [2021-06-12 20:01:19,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102648382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:19,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948866726] [2021-06-12 20:01:19,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:19,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:19,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:19,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:19,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:19,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:19,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:19,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:19,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:19,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-06-12 20:01:19,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:01:19,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:19,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:01:19,622 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:19,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:19,628 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:19,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:19,628 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-12 20:01:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:19,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948866726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:19,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:19,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:01:19,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160810768] [2021-06-12 20:01:19,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:01:19,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:19,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:01:19,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:01:19,646 INFO L87 Difference]: Start difference. First operand 468 states and 1465 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:19,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:19,800 INFO L93 Difference]: Finished difference Result 607 states and 1875 transitions. [2021-06-12 20:01:19,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:19,800 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:19,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:19,801 INFO L225 Difference]: With dead ends: 607 [2021-06-12 20:01:19,801 INFO L226 Difference]: Without dead ends: 571 [2021-06-12 20:01:19,801 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:01:19,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-12 20:01:19,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 468. [2021-06-12 20:01:19,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.137044967880086) internal successors, (1465), 467 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:19,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1465 transitions. [2021-06-12 20:01:19,806 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1465 transitions. Word has length 21 [2021-06-12 20:01:19,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:19,806 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1465 transitions. [2021-06-12 20:01:19,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:19,806 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1465 transitions. [2021-06-12 20:01:19,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:19,807 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:19,807 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:20,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2280,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:20,007 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:20,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:20,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1527790549, now seen corresponding path program 453 times [2021-06-12 20:01:20,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:20,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069568201] [2021-06-12 20:01:20,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:20,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:20,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:20,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069568201] [2021-06-12 20:01:20,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069568201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:20,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216158332] [2021-06-12 20:01:20,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:20,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:01:20,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:20,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:20,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:20,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:20,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:20,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:20,161 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:20,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:20,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:20,168 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:01:20,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:20,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:20,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:20,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:20,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:20,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:20,207 INFO L518 ElimStorePlain]: Eliminatee v_prenex_91 vanished before elimination [2021-06-12 20:01:20,207 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:20,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:20,208 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:13 [2021-06-12 20:01:20,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:20,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216158332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:20,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:20,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:01:20,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293238204] [2021-06-12 20:01:20,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:01:20,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:20,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:01:20,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:20,237 INFO L87 Difference]: Start difference. First operand 468 states and 1465 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:20,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:20,415 INFO L93 Difference]: Finished difference Result 648 states and 1994 transitions. [2021-06-12 20:01:20,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:20,416 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:20,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:20,417 INFO L225 Difference]: With dead ends: 648 [2021-06-12 20:01:20,417 INFO L226 Difference]: Without dead ends: 621 [2021-06-12 20:01:20,417 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:20,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-12 20:01:20,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 483. [2021-06-12 20:01:20,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 3.1348547717842323) internal successors, (1511), 482 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:20,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1511 transitions. [2021-06-12 20:01:20,422 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1511 transitions. Word has length 21 [2021-06-12 20:01:20,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:20,422 INFO L482 AbstractCegarLoop]: Abstraction has 483 states and 1511 transitions. [2021-06-12 20:01:20,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:20,422 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1511 transitions. [2021-06-12 20:01:20,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:20,423 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:20,423 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:20,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2283,454 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:20,623 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:20,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:20,624 INFO L82 PathProgramCache]: Analyzing trace with hash -886423809, now seen corresponding path program 454 times [2021-06-12 20:01:20,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:20,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336242963] [2021-06-12 20:01:20,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:20,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:20,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:20,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336242963] [2021-06-12 20:01:20,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336242963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:20,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068455481] [2021-06-12 20:01:20,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:20,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:20,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:20,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:20,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:20,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:20,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:20,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:20,781 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:20,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:20,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:20,787 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:01:20,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:20,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:20,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:20,821 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:20,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:20,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:01:20,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:20,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068455481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:20,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:20,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:01:20,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845495220] [2021-06-12 20:01:20,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:01:20,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:20,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:01:20,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:20,832 INFO L87 Difference]: Start difference. First operand 483 states and 1511 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:21,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:21,012 INFO L93 Difference]: Finished difference Result 598 states and 1841 transitions. [2021-06-12 20:01:21,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:21,012 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:21,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:21,013 INFO L225 Difference]: With dead ends: 598 [2021-06-12 20:01:21,013 INFO L226 Difference]: Without dead ends: 577 [2021-06-12 20:01:21,013 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:21,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-12 20:01:21,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 465. [2021-06-12 20:01:21,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.1400862068965516) internal successors, (1457), 464 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:21,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1457 transitions. [2021-06-12 20:01:21,018 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1457 transitions. Word has length 21 [2021-06-12 20:01:21,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:21,018 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1457 transitions. [2021-06-12 20:01:21,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:21,018 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1457 transitions. [2021-06-12 20:01:21,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:21,019 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:21,019 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:21,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2291 [2021-06-12 20:01:21,219 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:21,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:21,219 INFO L82 PathProgramCache]: Analyzing trace with hash -234130767, now seen corresponding path program 455 times [2021-06-12 20:01:21,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:21,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845095105] [2021-06-12 20:01:21,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:21,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:21,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:21,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845095105] [2021-06-12 20:01:21,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845095105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:21,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311599133] [2021-06-12 20:01:21,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:21,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:01:21,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:21,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:21,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:21,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:21,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:21,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:21,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:21,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-06-12 20:01:21,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:01:21,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:21,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:01:21,384 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:21,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:21,392 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:21,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:21,393 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-06-12 20:01:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:21,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311599133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:21,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:21,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:01:21,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498232976] [2021-06-12 20:01:21,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:01:21,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:21,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:01:21,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:01:21,427 INFO L87 Difference]: Start difference. First operand 465 states and 1457 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:21,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:21,585 INFO L93 Difference]: Finished difference Result 622 states and 1915 transitions. [2021-06-12 20:01:21,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:21,586 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:21,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:21,587 INFO L225 Difference]: With dead ends: 622 [2021-06-12 20:01:21,587 INFO L226 Difference]: Without dead ends: 586 [2021-06-12 20:01:21,587 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:01:21,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-06-12 20:01:21,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 466. [2021-06-12 20:01:21,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.1440860215053763) internal successors, (1462), 465 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:21,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1462 transitions. [2021-06-12 20:01:21,596 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1462 transitions. Word has length 21 [2021-06-12 20:01:21,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:21,596 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1462 transitions. [2021-06-12 20:01:21,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:21,596 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1462 transitions. [2021-06-12 20:01:21,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:21,597 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:21,597 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:21,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2294,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:21,798 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:21,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:21,798 INFO L82 PathProgramCache]: Analyzing trace with hash 63135643, now seen corresponding path program 456 times [2021-06-12 20:01:21,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:21,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151734686] [2021-06-12 20:01:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:21,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:21,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151734686] [2021-06-12 20:01:21,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151734686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:21,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246725058] [2021-06-12 20:01:21,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:21,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:01:21,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:21,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:21,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:21,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:21,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:21,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:21,971 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:21,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:21,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:01:21,987 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:01:22,020 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_94, v_prenex_93], 1=[o_0, o_4]} [2021-06-12 20:01:22,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:22,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:22,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:22,036 INFO L518 ElimStorePlain]: Eliminatee v_prenex_93 vanished before elimination [2021-06-12 20:01:22,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:22,038 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:22,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:22,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:01:22,052 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:22,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:22,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:22,063 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:51, output treesize:19 [2021-06-12 20:01:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:22,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246725058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:22,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:22,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:22,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851993819] [2021-06-12 20:01:22,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:22,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:22,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:22,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:22,135 INFO L87 Difference]: Start difference. First operand 466 states and 1462 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:22,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:22,635 INFO L93 Difference]: Finished difference Result 798 states and 2447 transitions. [2021-06-12 20:01:22,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:01:22,635 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:22,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:22,636 INFO L225 Difference]: With dead ends: 798 [2021-06-12 20:01:22,636 INFO L226 Difference]: Without dead ends: 775 [2021-06-12 20:01:22,637 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 351.8ms TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:01:22,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-06-12 20:01:22,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 472. [2021-06-12 20:01:22,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.1528662420382165) internal successors, (1485), 471 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:22,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1485 transitions. [2021-06-12 20:01:22,642 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1485 transitions. Word has length 21 [2021-06-12 20:01:22,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:22,642 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1485 transitions. [2021-06-12 20:01:22,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:22,643 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1485 transitions. [2021-06-12 20:01:22,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:22,643 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:22,643 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:22,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2297,457 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:22,844 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:22,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:22,844 INFO L82 PathProgramCache]: Analyzing trace with hash -221127041, now seen corresponding path program 457 times [2021-06-12 20:01:22,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:22,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805227489] [2021-06-12 20:01:22,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:22,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:22,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805227489] [2021-06-12 20:01:22,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805227489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:22,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459718127] [2021-06-12 20:01:22,928 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:22,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:22,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:22,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:22,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:22,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:22,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:23,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:23,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:23,002 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:01:23,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:23,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:23,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:23,038 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:23,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:23,040 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:23,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:23,049 INFO L518 ElimStorePlain]: Eliminatee v_prenex_95 vanished before elimination [2021-06-12 20:01:23,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:23,049 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:19 [2021-06-12 20:01:23,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:23,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459718127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:23,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:23,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:01:23,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679347656] [2021-06-12 20:01:23,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:23,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:23,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:23,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:23,123 INFO L87 Difference]: Start difference. First operand 472 states and 1485 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:23,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:23,587 INFO L93 Difference]: Finished difference Result 760 states and 2324 transitions. [2021-06-12 20:01:23,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:01:23,587 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:23,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:23,588 INFO L225 Difference]: With dead ends: 760 [2021-06-12 20:01:23,588 INFO L226 Difference]: Without dead ends: 733 [2021-06-12 20:01:23,588 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 378.8ms TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:01:23,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-06-12 20:01:23,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 490. [2021-06-12 20:01:23,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.1595092024539877) internal successors, (1545), 489 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:23,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1545 transitions. [2021-06-12 20:01:23,594 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1545 transitions. Word has length 21 [2021-06-12 20:01:23,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:23,594 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1545 transitions. [2021-06-12 20:01:23,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:23,595 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1545 transitions. [2021-06-12 20:01:23,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:23,595 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:23,595 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:23,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2306,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:23,795 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:23,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:23,796 INFO L82 PathProgramCache]: Analyzing trace with hash 2113093289, now seen corresponding path program 458 times [2021-06-12 20:01:23,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:23,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956645252] [2021-06-12 20:01:23,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:23,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:23,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:23,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:23,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956645252] [2021-06-12 20:01:23,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956645252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:23,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344126972] [2021-06-12 20:01:23,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:23,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:23,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:23,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:23,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:23,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:23,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:23,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:23,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:23,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:23,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:01:23,984 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:01:24,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:24,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:24,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:24,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:01:24,040 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:24,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:24,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:24,046 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:10 [2021-06-12 20:01:24,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:24,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344126972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:24,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:24,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:24,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997269584] [2021-06-12 20:01:24,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:24,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:24,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:24,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:24,092 INFO L87 Difference]: Start difference. First operand 490 states and 1545 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:24,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:24,410 INFO L93 Difference]: Finished difference Result 762 states and 2349 transitions. [2021-06-12 20:01:24,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:01:24,410 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:24,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:24,411 INFO L225 Difference]: With dead ends: 762 [2021-06-12 20:01:24,411 INFO L226 Difference]: Without dead ends: 743 [2021-06-12 20:01:24,412 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 258.4ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:24,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-06-12 20:01:24,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 488. [2021-06-12 20:01:24,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.162217659137577) internal successors, (1540), 487 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:24,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1540 transitions. [2021-06-12 20:01:24,418 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1540 transitions. Word has length 21 [2021-06-12 20:01:24,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:24,418 INFO L482 AbstractCegarLoop]: Abstraction has 488 states and 1540 transitions. [2021-06-12 20:01:24,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:24,418 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1540 transitions. [2021-06-12 20:01:24,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:24,418 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:24,418 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:24,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2317,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:24,619 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:24,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:24,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1636501353, now seen corresponding path program 459 times [2021-06-12 20:01:24,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:24,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121037569] [2021-06-12 20:01:24,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:24,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:24,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:24,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:24,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121037569] [2021-06-12 20:01:24,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121037569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:24,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357732448] [2021-06-12 20:01:24,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:24,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:01:24,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:24,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:24,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:24,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:24,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:24,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:24,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:24,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:24,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:24,767 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:01:24,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:24,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:24,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:24,828 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:24,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:24,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:01:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:24,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357732448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:24,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:24,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:01:24,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381281454] [2021-06-12 20:01:24,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:01:24,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:24,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:01:24,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:24,839 INFO L87 Difference]: Start difference. First operand 488 states and 1540 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:25,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:25,013 INFO L93 Difference]: Finished difference Result 632 states and 1942 transitions. [2021-06-12 20:01:25,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:25,014 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:25,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:25,015 INFO L225 Difference]: With dead ends: 632 [2021-06-12 20:01:25,015 INFO L226 Difference]: Without dead ends: 611 [2021-06-12 20:01:25,015 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:25,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-06-12 20:01:25,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 484. [2021-06-12 20:01:25,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.1635610766045548) internal successors, (1528), 483 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:25,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1528 transitions. [2021-06-12 20:01:25,020 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1528 transitions. Word has length 21 [2021-06-12 20:01:25,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:25,020 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1528 transitions. [2021-06-12 20:01:25,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:25,020 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1528 transitions. [2021-06-12 20:01:25,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:25,021 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:25,021 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:25,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 460 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2321 [2021-06-12 20:01:25,221 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:25,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:25,222 INFO L82 PathProgramCache]: Analyzing trace with hash 939481261, now seen corresponding path program 460 times [2021-06-12 20:01:25,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:25,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893469429] [2021-06-12 20:01:25,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:25,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:25,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893469429] [2021-06-12 20:01:25,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893469429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:25,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514242190] [2021-06-12 20:01:25,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:25,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:25,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:25,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:25,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:25,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:25,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:25,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:25,366 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:25,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:25,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:25,375 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:01:25,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:25,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:25,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:25,413 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:25,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:25,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:01:25,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:25,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514242190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:25,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:25,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:01:25,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706109866] [2021-06-12 20:01:25,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:01:25,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:25,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:01:25,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:01:25,429 INFO L87 Difference]: Start difference. First operand 484 states and 1528 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:25,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:25,549 INFO L93 Difference]: Finished difference Result 610 states and 1881 transitions. [2021-06-12 20:01:25,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:25,549 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:25,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:25,550 INFO L225 Difference]: With dead ends: 610 [2021-06-12 20:01:25,550 INFO L226 Difference]: Without dead ends: 589 [2021-06-12 20:01:25,550 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 110.9ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:01:25,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-06-12 20:01:25,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 467. [2021-06-12 20:01:25,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.143776824034335) internal successors, (1465), 466 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:25,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1465 transitions. [2021-06-12 20:01:25,556 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1465 transitions. Word has length 21 [2021-06-12 20:01:25,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:25,556 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1465 transitions. [2021-06-12 20:01:25,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:25,556 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1465 transitions. [2021-06-12 20:01:25,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:25,556 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:25,557 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:25,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2327 [2021-06-12 20:01:25,757 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:25,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:25,757 INFO L82 PathProgramCache]: Analyzing trace with hash 594236309, now seen corresponding path program 461 times [2021-06-12 20:01:25,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:25,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082770098] [2021-06-12 20:01:25,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:25,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:25,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:25,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082770098] [2021-06-12 20:01:25,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082770098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:25,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435591802] [2021-06-12 20:01:25,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:25,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:01:25,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:25,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:01:25,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:25,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:25,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:25,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:25,919 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:25,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:25,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:25,935 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:57, output treesize:43 [2021-06-12 20:01:25,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 20:01:25,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:25,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:25,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:26,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:26,007 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:26,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:26,007 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:21 [2021-06-12 20:01:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:26,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435591802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:26,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:26,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:01:26,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957899355] [2021-06-12 20:01:26,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:26,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:26,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:26,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:26,051 INFO L87 Difference]: Start difference. First operand 467 states and 1465 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:26,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:26,487 INFO L93 Difference]: Finished difference Result 761 states and 2348 transitions. [2021-06-12 20:01:26,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:01:26,487 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:26,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:26,488 INFO L225 Difference]: With dead ends: 761 [2021-06-12 20:01:26,488 INFO L226 Difference]: Without dead ends: 742 [2021-06-12 20:01:26,489 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 408.2ms TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:01:26,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-06-12 20:01:26,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 476. [2021-06-12 20:01:26,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.136842105263158) internal successors, (1490), 475 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:26,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1490 transitions. [2021-06-12 20:01:26,494 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1490 transitions. Word has length 21 [2021-06-12 20:01:26,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:26,494 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1490 transitions. [2021-06-12 20:01:26,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:26,494 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1490 transitions. [2021-06-12 20:01:26,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:26,495 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:26,495 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:26,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2330,462 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:26,695 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:26,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:26,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1439400171, now seen corresponding path program 462 times [2021-06-12 20:01:26,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:26,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656121429] [2021-06-12 20:01:26,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:26,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:26,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:26,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656121429] [2021-06-12 20:01:26,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656121429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:26,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756844445] [2021-06-12 20:01:26,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:26,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:01:26,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:26,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:26,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:26,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:26,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:26,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:26,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:26,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:01:26,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:26,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:26,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:26,904 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:26,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:26,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:01:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:26,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756844445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:26,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:26,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:01:26,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242927265] [2021-06-12 20:01:26,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:01:26,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:26,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:01:26,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:01:26,917 INFO L87 Difference]: Start difference. First operand 476 states and 1490 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:27,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:27,060 INFO L93 Difference]: Finished difference Result 646 states and 1990 transitions. [2021-06-12 20:01:27,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:27,060 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:27,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:27,061 INFO L225 Difference]: With dead ends: 646 [2021-06-12 20:01:27,061 INFO L226 Difference]: Without dead ends: 627 [2021-06-12 20:01:27,061 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 131.9ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:27,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-06-12 20:01:27,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 472. [2021-06-12 20:01:27,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.129511677282378) internal successors, (1474), 471 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:27,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1474 transitions. [2021-06-12 20:01:27,066 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1474 transitions. Word has length 21 [2021-06-12 20:01:27,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:27,066 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1474 transitions. [2021-06-12 20:01:27,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:27,066 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1474 transitions. [2021-06-12 20:01:27,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:27,067 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:27,067 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:27,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2337,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:27,267 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:27,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:27,267 INFO L82 PathProgramCache]: Analyzing trace with hash -821138003, now seen corresponding path program 463 times [2021-06-12 20:01:27,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:27,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982693189] [2021-06-12 20:01:27,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:27,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:27,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982693189] [2021-06-12 20:01:27,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982693189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:27,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75017080] [2021-06-12 20:01:27,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:27,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:27,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:27,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:27,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:27,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:27,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:27,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:27,446 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:01:27,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:27,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:27,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:27,470 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:27,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:27,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:01:27,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:27,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75017080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:27,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:27,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:01:27,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772198151] [2021-06-12 20:01:27,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:01:27,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:27,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:01:27,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:01:27,485 INFO L87 Difference]: Start difference. First operand 472 states and 1474 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:27,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:27,607 INFO L93 Difference]: Finished difference Result 644 states and 1970 transitions. [2021-06-12 20:01:27,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:27,607 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:27,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:27,608 INFO L225 Difference]: With dead ends: 644 [2021-06-12 20:01:27,608 INFO L226 Difference]: Without dead ends: 625 [2021-06-12 20:01:27,608 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:01:27,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-06-12 20:01:27,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 456. [2021-06-12 20:01:27,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.1164835164835165) internal successors, (1418), 455 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:27,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1418 transitions. [2021-06-12 20:01:27,613 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1418 transitions. Word has length 21 [2021-06-12 20:01:27,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:27,613 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1418 transitions. [2021-06-12 20:01:27,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:27,613 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1418 transitions. [2021-06-12 20:01:27,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:27,614 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:27,614 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:27,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2340 [2021-06-12 20:01:27,814 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:27,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:27,815 INFO L82 PathProgramCache]: Analyzing trace with hash 856074901, now seen corresponding path program 464 times [2021-06-12 20:01:27,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:27,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241115427] [2021-06-12 20:01:27,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:27,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:27,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:27,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241115427] [2021-06-12 20:01:27,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241115427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:27,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389927525] [2021-06-12 20:01:27,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:27,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:27,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:27,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:27,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:27,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:27,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:27,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:27,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:27,931 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 20:01:27,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:27,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:27,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:27,946 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:27,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:27,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:01:27,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:27,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389927525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:27,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:27,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:01:27,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352546868] [2021-06-12 20:01:27,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:01:27,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:27,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:01:27,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:01:27,958 INFO L87 Difference]: Start difference. First operand 456 states and 1418 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:28,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:28,072 INFO L93 Difference]: Finished difference Result 704 states and 2148 transitions. [2021-06-12 20:01:28,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:28,072 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:28,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:28,073 INFO L225 Difference]: With dead ends: 704 [2021-06-12 20:01:28,073 INFO L226 Difference]: Without dead ends: 685 [2021-06-12 20:01:28,074 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:01:28,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-06-12 20:01:28,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 449. [2021-06-12 20:01:28,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 3.1183035714285716) internal successors, (1397), 448 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:28,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1397 transitions. [2021-06-12 20:01:28,079 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1397 transitions. Word has length 21 [2021-06-12 20:01:28,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:28,079 INFO L482 AbstractCegarLoop]: Abstraction has 449 states and 1397 transitions. [2021-06-12 20:01:28,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:28,079 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1397 transitions. [2021-06-12 20:01:28,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:28,079 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:28,079 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:28,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 465 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2342 [2021-06-12 20:01:28,280 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:28,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:28,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1218485357, now seen corresponding path program 465 times [2021-06-12 20:01:28,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:28,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732060424] [2021-06-12 20:01:28,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:28,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:28,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:28,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732060424] [2021-06-12 20:01:28,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732060424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:28,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295185145] [2021-06-12 20:01:28,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:28,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:01:28,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:28,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:28,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:28,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:28,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:28,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:28,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:28,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-06-12 20:01:28,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:01:28,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:28,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:01:28,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:28,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:28,448 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:28,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:28,449 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-12 20:01:28,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:28,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295185145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:28,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:28,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:01:28,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002251593] [2021-06-12 20:01:28,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:01:28,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:28,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:01:28,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:01:28,466 INFO L87 Difference]: Start difference. First operand 449 states and 1397 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:28,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:28,615 INFO L93 Difference]: Finished difference Result 710 states and 2167 transitions. [2021-06-12 20:01:28,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:28,615 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:28,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:28,616 INFO L225 Difference]: With dead ends: 710 [2021-06-12 20:01:28,616 INFO L226 Difference]: Without dead ends: 663 [2021-06-12 20:01:28,616 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 104.2ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:01:28,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-12 20:01:28,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 449. [2021-06-12 20:01:28,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 3.1183035714285716) internal successors, (1397), 448 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:28,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1397 transitions. [2021-06-12 20:01:28,621 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1397 transitions. Word has length 21 [2021-06-12 20:01:28,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:28,621 INFO L482 AbstractCegarLoop]: Abstraction has 449 states and 1397 transitions. [2021-06-12 20:01:28,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:28,622 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1397 transitions. [2021-06-12 20:01:28,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:28,622 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:28,622 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:28,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2344 [2021-06-12 20:01:28,823 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:28,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:28,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1981783021, now seen corresponding path program 466 times [2021-06-12 20:01:28,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:28,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575891059] [2021-06-12 20:01:28,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:28,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:28,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:28,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575891059] [2021-06-12 20:01:28,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575891059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:28,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901596306] [2021-06-12 20:01:28,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:28,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:28,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:28,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:28,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:28,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:28,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:28,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:28,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:28,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:28,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:28,976 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-12 20:01:28,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:28,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:28,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:28,996 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:29,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:29,002 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:29,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:29,003 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:13 [2021-06-12 20:01:29,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:29,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901596306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:29,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:29,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:01:29,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984238822] [2021-06-12 20:01:29,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:01:29,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:29,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:01:29,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:01:29,030 INFO L87 Difference]: Start difference. First operand 449 states and 1397 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:29,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:29,253 INFO L93 Difference]: Finished difference Result 775 states and 2375 transitions. [2021-06-12 20:01:29,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:29,253 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:29,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:29,254 INFO L225 Difference]: With dead ends: 775 [2021-06-12 20:01:29,254 INFO L226 Difference]: Without dead ends: 748 [2021-06-12 20:01:29,255 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:29,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-06-12 20:01:29,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 474. [2021-06-12 20:01:29,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.116279069767442) internal successors, (1474), 473 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:29,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1474 transitions. [2021-06-12 20:01:29,260 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1474 transitions. Word has length 21 [2021-06-12 20:01:29,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:29,260 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1474 transitions. [2021-06-12 20:01:29,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:29,260 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1474 transitions. [2021-06-12 20:01:29,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:29,261 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:29,261 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:29,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2347,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:29,461 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:29,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:29,461 INFO L82 PathProgramCache]: Analyzing trace with hash -432431337, now seen corresponding path program 467 times [2021-06-12 20:01:29,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:29,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819112340] [2021-06-12 20:01:29,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:29,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:29,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:29,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:29,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819112340] [2021-06-12 20:01:29,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819112340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:29,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587198479] [2021-06-12 20:01:29,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:29,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:01:29,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:29,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:01:29,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:29,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:29,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:29,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:29,578 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:29,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:29,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:29,581 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-12 20:01:29,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:29,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:29,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:29,608 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:29,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:29,619 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:29,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:29,620 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:25 [2021-06-12 20:01:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:29,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587198479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:29,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:29,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:01:29,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415841756] [2021-06-12 20:01:29,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:01:29,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:29,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:01:29,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:01:29,664 INFO L87 Difference]: Start difference. First operand 474 states and 1474 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:29,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:29,895 INFO L93 Difference]: Finished difference Result 747 states and 2287 transitions. [2021-06-12 20:01:29,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:29,895 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:29,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:29,896 INFO L225 Difference]: With dead ends: 747 [2021-06-12 20:01:29,896 INFO L226 Difference]: Without dead ends: 726 [2021-06-12 20:01:29,896 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 159.9ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:29,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2021-06-12 20:01:29,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 471. [2021-06-12 20:01:29,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.119148936170213) internal successors, (1466), 470 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:29,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1466 transitions. [2021-06-12 20:01:29,902 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1466 transitions. Word has length 21 [2021-06-12 20:01:29,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:29,902 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1466 transitions. [2021-06-12 20:01:29,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:29,902 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1466 transitions. [2021-06-12 20:01:29,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:29,902 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:29,902 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:30,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2354 [2021-06-12 20:01:30,103 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:30,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:30,103 INFO L82 PathProgramCache]: Analyzing trace with hash 73914929, now seen corresponding path program 468 times [2021-06-12 20:01:30,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:30,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778385022] [2021-06-12 20:01:30,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:30,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:30,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778385022] [2021-06-12 20:01:30,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778385022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:30,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861203965] [2021-06-12 20:01:30,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:30,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:01:30,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:30,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:30,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:30,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:30,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:30,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:30,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:30,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:30,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:30,224 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-12 20:01:30,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:30,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:30,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:30,242 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:30,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:30,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:01:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:30,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861203965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:30,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:30,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:01:30,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952267395] [2021-06-12 20:01:30,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:01:30,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:30,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:01:30,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:01:30,253 INFO L87 Difference]: Start difference. First operand 471 states and 1466 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:30,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:30,360 INFO L93 Difference]: Finished difference Result 793 states and 2399 transitions. [2021-06-12 20:01:30,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:30,360 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:30,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:30,361 INFO L225 Difference]: With dead ends: 793 [2021-06-12 20:01:30,361 INFO L226 Difference]: Without dead ends: 772 [2021-06-12 20:01:30,361 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:01:30,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-06-12 20:01:30,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 444. [2021-06-12 20:01:30,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 3.124153498871332) internal successors, (1384), 443 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:30,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1384 transitions. [2021-06-12 20:01:30,367 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1384 transitions. Word has length 21 [2021-06-12 20:01:30,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:30,367 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 1384 transitions. [2021-06-12 20:01:30,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:30,367 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1384 transitions. [2021-06-12 20:01:30,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:30,368 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:30,368 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:30,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2359,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:30,568 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:30,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:30,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1978494773, now seen corresponding path program 469 times [2021-06-12 20:01:30,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:30,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7334098] [2021-06-12 20:01:30,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:30,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:30,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7334098] [2021-06-12 20:01:30,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7334098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:30,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470800274] [2021-06-12 20:01:30,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:30,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:30,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:30,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:30,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:30,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:30,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:30,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-06-12 20:01:30,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:01:30,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:30,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:01:30,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:30,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:30,726 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:30,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:30,727 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-06-12 20:01:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:30,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470800274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:30,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:30,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:01:30,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301833635] [2021-06-12 20:01:30,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:01:30,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:30,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:01:30,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:01:30,760 INFO L87 Difference]: Start difference. First operand 444 states and 1384 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:30,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:30,944 INFO L93 Difference]: Finished difference Result 730 states and 2220 transitions. [2021-06-12 20:01:30,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:30,944 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:30,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:30,945 INFO L225 Difference]: With dead ends: 730 [2021-06-12 20:01:30,945 INFO L226 Difference]: Without dead ends: 683 [2021-06-12 20:01:30,945 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:30,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-06-12 20:01:30,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 447. [2021-06-12 20:01:30,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 3.1367713004484306) internal successors, (1399), 446 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:30,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1399 transitions. [2021-06-12 20:01:30,951 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1399 transitions. Word has length 21 [2021-06-12 20:01:30,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:30,951 INFO L482 AbstractCegarLoop]: Abstraction has 447 states and 1399 transitions. [2021-06-12 20:01:30,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:30,951 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1399 transitions. [2021-06-12 20:01:30,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:30,951 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:30,951 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:31,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2362,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:31,152 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:31,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:31,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1681228363, now seen corresponding path program 470 times [2021-06-12 20:01:31,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:31,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820549750] [2021-06-12 20:01:31,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:31,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:31,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:31,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820549750] [2021-06-12 20:01:31,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820549750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:31,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090566051] [2021-06-12 20:01:31,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:31,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:31,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:31,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:31,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:31,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:31,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:31,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:31,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:31,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:31,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:01:31,322 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:51, output treesize:27 [2021-06-12 20:01:31,377 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_98, v_prenex_97], 1=[o_0, o_4]} [2021-06-12 20:01:31,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:31,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:31,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:31,392 INFO L518 ElimStorePlain]: Eliminatee v_prenex_97 vanished before elimination [2021-06-12 20:01:31,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:31,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:31,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:31,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:31,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:31,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:01:31,408 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:31,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:31,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:31,419 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:51, output treesize:19 [2021-06-12 20:01:31,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:31,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090566051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:31,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:31,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:31,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134471985] [2021-06-12 20:01:31,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:31,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:31,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:31,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:31,491 INFO L87 Difference]: Start difference. First operand 447 states and 1399 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:31,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:31,957 INFO L93 Difference]: Finished difference Result 946 states and 2886 transitions. [2021-06-12 20:01:31,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:01:31,957 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:31,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:31,958 INFO L225 Difference]: With dead ends: 946 [2021-06-12 20:01:31,958 INFO L226 Difference]: Without dead ends: 923 [2021-06-12 20:01:31,958 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 427.9ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:01:31,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-06-12 20:01:31,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 472. [2021-06-12 20:01:31,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.159235668789809) internal successors, (1488), 471 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:31,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1488 transitions. [2021-06-12 20:01:31,965 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1488 transitions. Word has length 21 [2021-06-12 20:01:31,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:31,965 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1488 transitions. [2021-06-12 20:01:31,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:31,965 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1488 transitions. [2021-06-12 20:01:31,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:31,965 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:31,965 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:32,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2365 [2021-06-12 20:01:32,166 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:32,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:32,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1965491047, now seen corresponding path program 471 times [2021-06-12 20:01:32,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:32,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963433889] [2021-06-12 20:01:32,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:32,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:32,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:32,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963433889] [2021-06-12 20:01:32,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963433889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:32,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074859882] [2021-06-12 20:01:32,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:32,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:01:32,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:32,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:32,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:32,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:32,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:32,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:32,306 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:32,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:32,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:32,312 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:01:32,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:32,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:32,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:32,351 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:32,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:32,359 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:32,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:32,360 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:19 [2021-06-12 20:01:32,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:32,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074859882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:32,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:32,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:01:32,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296451844] [2021-06-12 20:01:32,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:32,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:32,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:32,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:32,433 INFO L87 Difference]: Start difference. First operand 472 states and 1488 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:32,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:32,948 INFO L93 Difference]: Finished difference Result 946 states and 2879 transitions. [2021-06-12 20:01:32,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:01:32,948 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:32,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:32,949 INFO L225 Difference]: With dead ends: 946 [2021-06-12 20:01:32,950 INFO L226 Difference]: Without dead ends: 919 [2021-06-12 20:01:32,950 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 444.5ms TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:01:32,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2021-06-12 20:01:32,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 502. [2021-06-12 20:01:32,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.1716566866267466) internal successors, (1589), 501 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:32,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1589 transitions. [2021-06-12 20:01:32,956 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1589 transitions. Word has length 21 [2021-06-12 20:01:32,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:32,956 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 1589 transitions. [2021-06-12 20:01:32,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:32,956 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1589 transitions. [2021-06-12 20:01:32,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:32,957 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:32,957 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:33,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2374,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:33,157 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:33,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:33,157 INFO L82 PathProgramCache]: Analyzing trace with hash 368729283, now seen corresponding path program 472 times [2021-06-12 20:01:33,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:33,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810004691] [2021-06-12 20:01:33,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:33,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:33,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:33,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810004691] [2021-06-12 20:01:33,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810004691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:33,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843716131] [2021-06-12 20:01:33,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:33,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:33,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:33,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:33,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:33,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:33,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:33,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:33,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:33,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:33,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:01:33,322 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:51, output treesize:27 [2021-06-12 20:01:33,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:33,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:33,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:33,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:33,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:33,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:01:33,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:33,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:33,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:33,426 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:10 [2021-06-12 20:01:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:33,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843716131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:33,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:33,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:01:33,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684892116] [2021-06-12 20:01:33,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:01:33,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:33,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:01:33,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:33,444 INFO L87 Difference]: Start difference. First operand 502 states and 1589 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:33,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:33,669 INFO L93 Difference]: Finished difference Result 851 states and 2617 transitions. [2021-06-12 20:01:33,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:33,669 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:33,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:33,670 INFO L225 Difference]: With dead ends: 851 [2021-06-12 20:01:33,670 INFO L226 Difference]: Without dead ends: 832 [2021-06-12 20:01:33,670 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 178.1ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:33,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-06-12 20:01:33,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 500. [2021-06-12 20:01:33,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 3.1743486973947896) internal successors, (1584), 499 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:33,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1584 transitions. [2021-06-12 20:01:33,676 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1584 transitions. Word has length 21 [2021-06-12 20:01:33,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:33,676 INFO L482 AbstractCegarLoop]: Abstraction has 500 states and 1584 transitions. [2021-06-12 20:01:33,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:33,676 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1584 transitions. [2021-06-12 20:01:33,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:33,677 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:33,677 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:33,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2384,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:33,877 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:33,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:33,878 INFO L82 PathProgramCache]: Analyzing trace with hash 914101937, now seen corresponding path program 473 times [2021-06-12 20:01:33,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:33,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408945457] [2021-06-12 20:01:33,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:33,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:33,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:33,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408945457] [2021-06-12 20:01:33,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408945457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:33,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314178329] [2021-06-12 20:01:33,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:33,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:01:33,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:33,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:01:33,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:33,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:33,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:33,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:33,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:34,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:34,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:34,006 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:01:34,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:34,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:34,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:34,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:34,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:34,088 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:34,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:34,088 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:25 [2021-06-12 20:01:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:34,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314178329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:34,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:34,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:01:34,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366980175] [2021-06-12 20:01:34,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:34,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:34,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:34,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:34,136 INFO L87 Difference]: Start difference. First operand 500 states and 1584 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:34,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:34,362 INFO L93 Difference]: Finished difference Result 821 states and 2508 transitions. [2021-06-12 20:01:34,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:34,362 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:34,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:34,363 INFO L225 Difference]: With dead ends: 821 [2021-06-12 20:01:34,363 INFO L226 Difference]: Without dead ends: 800 [2021-06-12 20:01:34,363 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 234.5ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:01:34,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-06-12 20:01:34,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 496. [2021-06-12 20:01:34,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 3.1737373737373735) internal successors, (1571), 495 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:34,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1571 transitions. [2021-06-12 20:01:34,372 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1571 transitions. Word has length 21 [2021-06-12 20:01:34,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:34,372 INFO L482 AbstractCegarLoop]: Abstraction has 496 states and 1571 transitions. [2021-06-12 20:01:34,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:34,372 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1571 transitions. [2021-06-12 20:01:34,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:34,373 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:34,373 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:34,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2388 [2021-06-12 20:01:34,596 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:34,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:34,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1853818609, now seen corresponding path program 474 times [2021-06-12 20:01:34,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:34,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095483131] [2021-06-12 20:01:34,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:34,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:34,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:34,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:34,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095483131] [2021-06-12 20:01:34,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095483131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:34,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582010649] [2021-06-12 20:01:34,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:34,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:01:34,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:34,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:34,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:34,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:34,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:34,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:34,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:34,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:34,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:01:34,781 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:51, output treesize:27 [2021-06-12 20:01:34,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:34,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:34,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:34,829 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:34,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:34,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:01:34,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:34,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582010649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:34,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:34,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:01:34,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039881541] [2021-06-12 20:01:34,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:34,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:34,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:34,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:34,872 INFO L87 Difference]: Start difference. First operand 496 states and 1571 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:35,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:35,243 INFO L93 Difference]: Finished difference Result 1016 states and 3106 transitions. [2021-06-12 20:01:35,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:01:35,243 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:35,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:35,245 INFO L225 Difference]: With dead ends: 1016 [2021-06-12 20:01:35,245 INFO L226 Difference]: Without dead ends: 997 [2021-06-12 20:01:35,245 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 296.9ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:01:35,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-06-12 20:01:35,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 474. [2021-06-12 20:01:35,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.156448202959831) internal successors, (1493), 473 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:35,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1493 transitions. [2021-06-12 20:01:35,251 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1493 transitions. Word has length 21 [2021-06-12 20:01:35,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:35,251 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1493 transitions. [2021-06-12 20:01:35,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:35,251 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1493 transitions. [2021-06-12 20:01:35,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:35,252 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:35,252 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:35,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2396,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:35,452 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:35,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:35,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1703652455, now seen corresponding path program 475 times [2021-06-12 20:01:35,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:35,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968370027] [2021-06-12 20:01:35,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:35,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:35,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:35,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:35,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968370027] [2021-06-12 20:01:35,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968370027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:35,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85038804] [2021-06-12 20:01:35,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:35,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:35,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:35,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:35,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:35,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:35,562 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:35,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:35,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:35,569 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:01:35,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:35,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:35,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:35,609 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:35,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:35,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:01:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:35,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85038804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:35,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:35,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:01:35,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595115434] [2021-06-12 20:01:35,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:01:35,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:35,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:01:35,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:01:35,620 INFO L87 Difference]: Start difference. First operand 474 states and 1493 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:35,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:35,769 INFO L93 Difference]: Finished difference Result 826 states and 2491 transitions. [2021-06-12 20:01:35,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:35,769 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:35,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:35,771 INFO L225 Difference]: With dead ends: 826 [2021-06-12 20:01:35,771 INFO L226 Difference]: Without dead ends: 805 [2021-06-12 20:01:35,771 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:35,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-06-12 20:01:35,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 442. [2021-06-12 20:01:35,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.120181405895692) internal successors, (1376), 441 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:35,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1376 transitions. [2021-06-12 20:01:35,776 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1376 transitions. Word has length 21 [2021-06-12 20:01:35,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:35,776 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1376 transitions. [2021-06-12 20:01:35,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:35,776 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1376 transitions. [2021-06-12 20:01:35,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:35,777 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:35,777 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:35,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2400 [2021-06-12 20:01:35,977 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:35,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:35,978 INFO L82 PathProgramCache]: Analyzing trace with hash 293731731, now seen corresponding path program 476 times [2021-06-12 20:01:35,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:35,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485352368] [2021-06-12 20:01:35,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:36,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:36,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:36,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485352368] [2021-06-12 20:01:36,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485352368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:36,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070312360] [2021-06-12 20:01:36,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:36,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:36,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:36,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:36,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:36,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:36,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:36,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:36,118 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:36,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:36,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:36,128 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:01:36,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:36,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:36,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:36,170 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:01:36,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:36,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:01:36,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:36,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070312360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:36,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:36,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:01:36,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298877594] [2021-06-12 20:01:36,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:01:36,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:36,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:01:36,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:01:36,184 INFO L87 Difference]: Start difference. First operand 442 states and 1376 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:36,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:36,320 INFO L93 Difference]: Finished difference Result 549 states and 1688 transitions. [2021-06-12 20:01:36,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:36,320 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:36,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:36,321 INFO L225 Difference]: With dead ends: 549 [2021-06-12 20:01:36,321 INFO L226 Difference]: Without dead ends: 527 [2021-06-12 20:01:36,321 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:36,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-06-12 20:01:36,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 454. [2021-06-12 20:01:36,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 3.123620309050773) internal successors, (1415), 453 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:36,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1415 transitions. [2021-06-12 20:01:36,326 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1415 transitions. Word has length 21 [2021-06-12 20:01:36,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:36,326 INFO L482 AbstractCegarLoop]: Abstraction has 454 states and 1415 transitions. [2021-06-12 20:01:36,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:36,326 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1415 transitions. [2021-06-12 20:01:36,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:36,327 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:36,327 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:36,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2406,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:36,527 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:36,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:36,527 INFO L82 PathProgramCache]: Analyzing trace with hash 919055849, now seen corresponding path program 477 times [2021-06-12 20:01:36,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:36,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743987330] [2021-06-12 20:01:36,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:36,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:36,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:36,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:36,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743987330] [2021-06-12 20:01:36,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743987330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:36,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395254680] [2021-06-12 20:01:36,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:36,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:01:36,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:36,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:36,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:36,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:36,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:36,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:36,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:36,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 20:01:36,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:01:36,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:36,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:36,717 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:36,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:36,723 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:01:36,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:36,724 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:01:36,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:36,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395254680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:36,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:36,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:01:36,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343550982] [2021-06-12 20:01:36,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:36,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:36,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:36,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:36,767 INFO L87 Difference]: Start difference. First operand 454 states and 1415 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:37,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:37,076 INFO L93 Difference]: Finished difference Result 666 states and 2042 transitions. [2021-06-12 20:01:37,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:01:37,077 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:37,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:37,078 INFO L225 Difference]: With dead ends: 666 [2021-06-12 20:01:37,078 INFO L226 Difference]: Without dead ends: 639 [2021-06-12 20:01:37,078 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 217.9ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:01:37,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-06-12 20:01:37,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 454. [2021-06-12 20:01:37,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 3.119205298013245) internal successors, (1413), 453 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:37,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1413 transitions. [2021-06-12 20:01:37,083 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1413 transitions. Word has length 21 [2021-06-12 20:01:37,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:37,083 INFO L482 AbstractCegarLoop]: Abstraction has 454 states and 1413 transitions. [2021-06-12 20:01:37,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:37,083 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1413 transitions. [2021-06-12 20:01:37,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:37,083 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:37,083 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:37,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2409 [2021-06-12 20:01:37,284 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:37,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:37,284 INFO L82 PathProgramCache]: Analyzing trace with hash 634793165, now seen corresponding path program 478 times [2021-06-12 20:01:37,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:37,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289528024] [2021-06-12 20:01:37,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:37,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:37,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:37,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289528024] [2021-06-12 20:01:37,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289528024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:37,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457436544] [2021-06-12 20:01:37,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:37,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:37,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:37,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:37,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:37,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:37,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:37,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:37,444 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:37,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:37,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:37,453 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:01:37,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:37,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:37,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:37,509 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:01:37,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:37,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:37,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:37,517 INFO L518 ElimStorePlain]: Eliminatee v_prenex_99 vanished before elimination [2021-06-12 20:01:37,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:37,518 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:13 [2021-06-12 20:01:37,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:37,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457436544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:37,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:37,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:01:37,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919434112] [2021-06-12 20:01:37,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:37,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:37,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:37,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:37,565 INFO L87 Difference]: Start difference. First operand 454 states and 1413 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:38,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:38,053 INFO L93 Difference]: Finished difference Result 776 states and 2370 transitions. [2021-06-12 20:01:38,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:01:38,054 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:38,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:38,055 INFO L225 Difference]: With dead ends: 776 [2021-06-12 20:01:38,055 INFO L226 Difference]: Without dead ends: 749 [2021-06-12 20:01:38,055 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 396.2ms TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:01:38,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-06-12 20:01:38,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 470. [2021-06-12 20:01:38,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.121535181236674) internal successors, (1464), 469 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:38,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1464 transitions. [2021-06-12 20:01:38,060 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1464 transitions. Word has length 21 [2021-06-12 20:01:38,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:38,060 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1464 transitions. [2021-06-12 20:01:38,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:38,061 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1464 transitions. [2021-06-12 20:01:38,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:38,061 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:38,061 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:38,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2412 [2021-06-12 20:01:38,265 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:38,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:38,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1973782291, now seen corresponding path program 479 times [2021-06-12 20:01:38,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:38,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732583559] [2021-06-12 20:01:38,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:38,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:38,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:38,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:38,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732583559] [2021-06-12 20:01:38,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732583559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:38,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058294760] [2021-06-12 20:01:38,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:38,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:01:38,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:38,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:01:38,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:38,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:38,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:38,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:38,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:38,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:38,427 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:38,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:38,429 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:38,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:38,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:38,456 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:101, output treesize:69 [2021-06-12 20:01:38,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:38,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:38,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 20:01:38,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:38,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:38,560 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:01:38,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:38,561 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:21 [2021-06-12 20:01:38,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:38,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058294760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:38,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:38,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:01:38,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783285951] [2021-06-12 20:01:38,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:38,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:38,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:38,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:38,610 INFO L87 Difference]: Start difference. First operand 470 states and 1464 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:39,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:39,435 INFO L93 Difference]: Finished difference Result 734 states and 2215 transitions. [2021-06-12 20:01:39,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:01:39,435 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:39,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:39,436 INFO L225 Difference]: With dead ends: 734 [2021-06-12 20:01:39,436 INFO L226 Difference]: Without dead ends: 692 [2021-06-12 20:01:39,436 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 773.9ms TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:01:39,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-06-12 20:01:39,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 471. [2021-06-12 20:01:39,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.129787234042553) internal successors, (1471), 470 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:39,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1471 transitions. [2021-06-12 20:01:39,441 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1471 transitions. Word has length 21 [2021-06-12 20:01:39,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:39,441 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1471 transitions. [2021-06-12 20:01:39,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:39,441 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1471 transitions. [2021-06-12 20:01:39,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:39,442 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:39,442 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:39,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2423 [2021-06-12 20:01:39,642 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:39,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:39,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1951277919, now seen corresponding path program 480 times [2021-06-12 20:01:39,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:39,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568460028] [2021-06-12 20:01:39,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:39,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:39,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568460028] [2021-06-12 20:01:39,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568460028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:39,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807568827] [2021-06-12 20:01:39,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:39,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:01:39,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:39,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:39,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:39,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:39,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:39,783 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:39,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:39,792 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:01:39,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:39,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:39,829 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:01:39,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:39,831 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:39,840 INFO L518 ElimStorePlain]: Eliminatee v_prenex_102 vanished before elimination [2021-06-12 20:01:39,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:39,840 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:21 [2021-06-12 20:01:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:39,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807568827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:39,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:39,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:01:39,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024117581] [2021-06-12 20:01:39,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:01:39,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:39,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:01:39,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:01:39,879 INFO L87 Difference]: Start difference. First operand 471 states and 1471 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:40,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:40,018 INFO L93 Difference]: Finished difference Result 613 states and 1891 transitions. [2021-06-12 20:01:40,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:40,018 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:40,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:40,019 INFO L225 Difference]: With dead ends: 613 [2021-06-12 20:01:40,019 INFO L226 Difference]: Without dead ends: 584 [2021-06-12 20:01:40,019 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 140.5ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:40,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-06-12 20:01:40,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 471. [2021-06-12 20:01:40,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.129787234042553) internal successors, (1471), 470 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:40,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1471 transitions. [2021-06-12 20:01:40,024 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1471 transitions. Word has length 21 [2021-06-12 20:01:40,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:40,024 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1471 transitions. [2021-06-12 20:01:40,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:40,025 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1471 transitions. [2021-06-12 20:01:40,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:40,025 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:40,025 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:40,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2433,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:40,226 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:40,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:40,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1654011509, now seen corresponding path program 481 times [2021-06-12 20:01:40,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:40,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987351134] [2021-06-12 20:01:40,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:40,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:40,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:40,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:40,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987351134] [2021-06-12 20:01:40,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987351134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:40,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392890091] [2021-06-12 20:01:40,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:40,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:40,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:40,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:40,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:40,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:40,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:40,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 20:01:40,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:40,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:40,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:01:40,398 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:40,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:40,406 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:01:40,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:40,407 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:45, output treesize:19 [2021-06-12 20:01:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:40,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392890091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:40,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:40,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:01:40,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332916059] [2021-06-12 20:01:40,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:40,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:40,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:40,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:40,475 INFO L87 Difference]: Start difference. First operand 471 states and 1471 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:40,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:40,866 INFO L93 Difference]: Finished difference Result 683 states and 2097 transitions. [2021-06-12 20:01:40,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:01:40,866 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:40,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:40,867 INFO L225 Difference]: With dead ends: 683 [2021-06-12 20:01:40,867 INFO L226 Difference]: Without dead ends: 660 [2021-06-12 20:01:40,867 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 293.8ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:01:40,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-06-12 20:01:40,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 470. [2021-06-12 20:01:40,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.138592750533049) internal successors, (1472), 469 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:40,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1472 transitions. [2021-06-12 20:01:40,872 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1472 transitions. Word has length 21 [2021-06-12 20:01:40,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:40,872 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1472 transitions. [2021-06-12 20:01:40,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:40,872 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1472 transitions. [2021-06-12 20:01:40,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:40,873 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:40,873 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:41,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2438 [2021-06-12 20:01:41,073 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:41,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:41,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1938274193, now seen corresponding path program 482 times [2021-06-12 20:01:41,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:41,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558736346] [2021-06-12 20:01:41,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:41,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:41,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:41,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558736346] [2021-06-12 20:01:41,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558736346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:41,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043456668] [2021-06-12 20:01:41,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:41,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:41,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:41,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:41,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:41,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:41,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:41,241 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:41,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:41,250 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:01:41,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:41,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:41,287 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:01:41,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:41,290 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:41,298 INFO L518 ElimStorePlain]: Eliminatee v_prenex_104 vanished before elimination [2021-06-12 20:01:41,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:41,299 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:19 [2021-06-12 20:01:41,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:41,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043456668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:41,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:41,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:01:41,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320433877] [2021-06-12 20:01:41,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:41,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:41,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:41,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:41,371 INFO L87 Difference]: Start difference. First operand 470 states and 1472 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:41,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:41,893 INFO L93 Difference]: Finished difference Result 800 states and 2432 transitions. [2021-06-12 20:01:41,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:01:41,893 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:41,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:41,894 INFO L225 Difference]: With dead ends: 800 [2021-06-12 20:01:41,894 INFO L226 Difference]: Without dead ends: 773 [2021-06-12 20:01:41,894 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 445.3ms TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:01:41,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2021-06-12 20:01:41,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 473. [2021-06-12 20:01:41,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.1483050847457625) internal successors, (1486), 472 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:41,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1486 transitions. [2021-06-12 20:01:41,900 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1486 transitions. Word has length 21 [2021-06-12 20:01:41,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:41,900 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1486 transitions. [2021-06-12 20:01:41,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:41,900 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1486 transitions. [2021-06-12 20:01:41,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:41,900 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:41,900 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:42,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2444,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:42,101 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:42,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:42,101 INFO L82 PathProgramCache]: Analyzing trace with hash 137415597, now seen corresponding path program 483 times [2021-06-12 20:01:42,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:42,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598328142] [2021-06-12 20:01:42,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:42,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:42,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:42,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:42,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598328142] [2021-06-12 20:01:42,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598328142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:42,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566848833] [2021-06-12 20:01:42,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:42,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:01:42,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:42,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:42,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:42,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:42,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:42,269 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:42,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:42,278 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:01:42,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:42,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:42,317 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:01:42,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:01:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:42,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566848833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:42,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:42,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:01:42,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766636363] [2021-06-12 20:01:42,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:42,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:42,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:42,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:42,360 INFO L87 Difference]: Start difference. First operand 473 states and 1486 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:42,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:42,675 INFO L93 Difference]: Finished difference Result 696 states and 2131 transitions. [2021-06-12 20:01:42,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:01:42,675 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:42,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:42,676 INFO L225 Difference]: With dead ends: 696 [2021-06-12 20:01:42,676 INFO L226 Difference]: Without dead ends: 675 [2021-06-12 20:01:42,676 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 320.1ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:01:42,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-06-12 20:01:42,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 469. [2021-06-12 20:01:42,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.138888888888889) internal successors, (1469), 468 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:42,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1469 transitions. [2021-06-12 20:01:42,681 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1469 transitions. Word has length 21 [2021-06-12 20:01:42,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:42,681 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1469 transitions. [2021-06-12 20:01:42,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:42,681 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1469 transitions. [2021-06-12 20:01:42,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:42,682 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:42,682 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:42,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2455 [2021-06-12 20:01:42,883 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:42,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:42,883 INFO L82 PathProgramCache]: Analyzing trace with hash -254032975, now seen corresponding path program 484 times [2021-06-12 20:01:42,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:42,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323816134] [2021-06-12 20:01:42,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:42,957 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:42,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:42,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323816134] [2021-06-12 20:01:42,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323816134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:42,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728666727] [2021-06-12 20:01:42,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:42,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:42,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:42,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:42,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:43,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:43,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:43,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:43,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:43,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-06-12 20:01:43,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:01:43,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:43,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:01:43,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:43,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:43,053 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:43,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:43,053 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-06-12 20:01:43,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:43,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728666727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:43,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:43,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:01:43,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328429360] [2021-06-12 20:01:43,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:01:43,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:43,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:01:43,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:01:43,087 INFO L87 Difference]: Start difference. First operand 469 states and 1469 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:43,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:43,243 INFO L93 Difference]: Finished difference Result 587 states and 1812 transitions. [2021-06-12 20:01:43,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:43,243 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:43,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:43,244 INFO L225 Difference]: With dead ends: 587 [2021-06-12 20:01:43,244 INFO L226 Difference]: Without dead ends: 551 [2021-06-12 20:01:43,244 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:01:43,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-06-12 20:01:43,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 470. [2021-06-12 20:01:43,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.142857142857143) internal successors, (1474), 469 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:43,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1474 transitions. [2021-06-12 20:01:43,249 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1474 transitions. Word has length 21 [2021-06-12 20:01:43,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:43,249 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1474 transitions. [2021-06-12 20:01:43,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:43,249 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1474 transitions. [2021-06-12 20:01:43,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:43,250 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:43,250 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:43,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2458,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:43,450 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:43,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:43,450 INFO L82 PathProgramCache]: Analyzing trace with hash 43233435, now seen corresponding path program 485 times [2021-06-12 20:01:43,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:43,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282220779] [2021-06-12 20:01:43,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:43,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:43,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:43,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282220779] [2021-06-12 20:01:43,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282220779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:43,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561919033] [2021-06-12 20:01:43,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:43,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:01:43,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:43,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:01:43,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:43,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:43,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:43,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:43,609 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:43,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:43,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:43,618 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:01:43,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:43,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:43,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:43,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:43,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:43,679 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:43,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:43,682 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:43,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:43,685 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:43,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:43,716 INFO L518 ElimStorePlain]: Eliminatee v_prenex_106 vanished before elimination [2021-06-12 20:01:43,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:43,717 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:105, output treesize:57 [2021-06-12 20:01:43,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:43,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561919033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:43,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:43,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:01:43,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028687267] [2021-06-12 20:01:43,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:43,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:43,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:43,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:43,830 INFO L87 Difference]: Start difference. First operand 470 states and 1474 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:44,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:44,486 INFO L93 Difference]: Finished difference Result 763 states and 2352 transitions. [2021-06-12 20:01:44,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:01:44,486 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:44,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:44,487 INFO L225 Difference]: With dead ends: 763 [2021-06-12 20:01:44,487 INFO L226 Difference]: Without dead ends: 721 [2021-06-12 20:01:44,487 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 617.5ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:01:44,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-06-12 20:01:44,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 485. [2021-06-12 20:01:44,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.159090909090909) internal successors, (1529), 484 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:44,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1529 transitions. [2021-06-12 20:01:44,493 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1529 transitions. Word has length 21 [2021-06-12 20:01:44,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:44,493 INFO L482 AbstractCegarLoop]: Abstraction has 485 states and 1529 transitions. [2021-06-12 20:01:44,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:44,494 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1529 transitions. [2021-06-12 20:01:44,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:44,494 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:44,494 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:44,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2461,486 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:44,695 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:44,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:44,695 INFO L82 PathProgramCache]: Analyzing trace with hash -241029249, now seen corresponding path program 486 times [2021-06-12 20:01:44,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:44,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116602824] [2021-06-12 20:01:44,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:44,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:44,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:44,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:44,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116602824] [2021-06-12 20:01:44,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116602824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:44,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657050351] [2021-06-12 20:01:44,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:44,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:01:44,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:44,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:44,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:44,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:44,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:44,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:44,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:44,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:44,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:44,862 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:01:44,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:44,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:44,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:44,898 INFO L518 ElimStorePlain]: Eliminatee v_prenex_108 vanished before elimination [2021-06-12 20:01:44,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:44,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:44,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:44,909 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:44,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:44,910 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:19 [2021-06-12 20:01:44,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:44,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657050351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:44,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:44,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:01:44,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027193376] [2021-06-12 20:01:44,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:44,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:44,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:44,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:44,991 INFO L87 Difference]: Start difference. First operand 485 states and 1529 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:45,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:45,463 INFO L93 Difference]: Finished difference Result 721 states and 2216 transitions. [2021-06-12 20:01:45,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:01:45,463 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:45,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:45,465 INFO L225 Difference]: With dead ends: 721 [2021-06-12 20:01:45,465 INFO L226 Difference]: Without dead ends: 694 [2021-06-12 20:01:45,465 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 362.8ms TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:01:45,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-06-12 20:01:45,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 491. [2021-06-12 20:01:45,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.157142857142857) internal successors, (1547), 490 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:45,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1547 transitions. [2021-06-12 20:01:45,471 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1547 transitions. Word has length 21 [2021-06-12 20:01:45,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:45,471 INFO L482 AbstractCegarLoop]: Abstraction has 491 states and 1547 transitions. [2021-06-12 20:01:45,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:45,471 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1547 transitions. [2021-06-12 20:01:45,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:45,471 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:45,471 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:45,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2470,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:45,672 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:45,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:45,672 INFO L82 PathProgramCache]: Analyzing trace with hash 2093191081, now seen corresponding path program 487 times [2021-06-12 20:01:45,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:45,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451205643] [2021-06-12 20:01:45,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:45,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:45,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:45,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451205643] [2021-06-12 20:01:45,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451205643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:45,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073783096] [2021-06-12 20:01:45,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:45,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:45,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:45,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:45,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:45,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:45,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:45,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:45,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:45,825 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:01:45,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:45,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:45,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:45,863 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:45,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:45,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:01:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:45,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073783096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:45,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:45,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:01:45,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85224779] [2021-06-12 20:01:45,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:01:45,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:45,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:01:45,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:01:45,885 INFO L87 Difference]: Start difference. First operand 491 states and 1547 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:46,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:46,048 INFO L93 Difference]: Finished difference Result 593 states and 1830 transitions. [2021-06-12 20:01:46,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:46,048 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:46,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:46,049 INFO L225 Difference]: With dead ends: 593 [2021-06-12 20:01:46,049 INFO L226 Difference]: Without dead ends: 574 [2021-06-12 20:01:46,049 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 110.9ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:01:46,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-06-12 20:01:46,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 475. [2021-06-12 20:01:46,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.149789029535865) internal successors, (1493), 474 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:46,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1493 transitions. [2021-06-12 20:01:46,055 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1493 transitions. Word has length 21 [2021-06-12 20:01:46,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:46,055 INFO L482 AbstractCegarLoop]: Abstraction has 475 states and 1493 transitions. [2021-06-12 20:01:46,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:46,055 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1493 transitions. [2021-06-12 20:01:46,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:46,055 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:46,056 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:46,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2481,488 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:46,256 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:46,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:46,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1656403561, now seen corresponding path program 488 times [2021-06-12 20:01:46,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:46,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925693695] [2021-06-12 20:01:46,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:46,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:46,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:46,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925693695] [2021-06-12 20:01:46,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925693695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:46,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859846976] [2021-06-12 20:01:46,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:46,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:46,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:46,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:46,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:46,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:46,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:46,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:46,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:46,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:46,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:46,411 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:01:46,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:46,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:46,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:46,471 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:46,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:46,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:01:46,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:46,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859846976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:46,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:46,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:01:46,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59504332] [2021-06-12 20:01:46,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:01:46,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:46,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:01:46,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:46,482 INFO L87 Difference]: Start difference. First operand 475 states and 1493 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:46,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:46,620 INFO L93 Difference]: Finished difference Result 609 states and 1868 transitions. [2021-06-12 20:01:46,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:46,620 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:46,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:46,621 INFO L225 Difference]: With dead ends: 609 [2021-06-12 20:01:46,621 INFO L226 Difference]: Without dead ends: 588 [2021-06-12 20:01:46,621 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 143.0ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:46,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-12 20:01:46,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 475. [2021-06-12 20:01:46,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.1582278481012658) internal successors, (1497), 474 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:46,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1497 transitions. [2021-06-12 20:01:46,627 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1497 transitions. Word has length 21 [2021-06-12 20:01:46,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:46,627 INFO L482 AbstractCegarLoop]: Abstraction has 475 states and 1497 transitions. [2021-06-12 20:01:46,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:46,627 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1497 transitions. [2021-06-12 20:01:46,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:46,627 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:46,628 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:46,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2484,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:46,828 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:46,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:46,828 INFO L82 PathProgramCache]: Analyzing trace with hash 919579053, now seen corresponding path program 489 times [2021-06-12 20:01:46,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:46,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387577174] [2021-06-12 20:01:46,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:46,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:46,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:46,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387577174] [2021-06-12 20:01:46,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387577174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:46,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434062497] [2021-06-12 20:01:46,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:46,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:01:46,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:46,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:46,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:47,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:47,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:47,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:47,011 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:47,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:47,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:01:47,027 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:01:47,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:47,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:47,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:47,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:01:47,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:47,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:47,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:47,089 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:10 [2021-06-12 20:01:47,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:47,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434062497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:47,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:47,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:47,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816006086] [2021-06-12 20:01:47,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:47,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:47,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:47,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:47,134 INFO L87 Difference]: Start difference. First operand 475 states and 1497 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:47,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:47,474 INFO L93 Difference]: Finished difference Result 678 states and 2080 transitions. [2021-06-12 20:01:47,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:01:47,475 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:47,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:47,476 INFO L225 Difference]: With dead ends: 678 [2021-06-12 20:01:47,476 INFO L226 Difference]: Without dead ends: 657 [2021-06-12 20:01:47,476 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 271.1ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:47,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-06-12 20:01:47,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 471. [2021-06-12 20:01:47,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.148936170212766) internal successors, (1480), 470 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:47,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1480 transitions. [2021-06-12 20:01:47,481 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1480 transitions. Word has length 21 [2021-06-12 20:01:47,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:47,482 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1480 transitions. [2021-06-12 20:01:47,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:47,482 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1480 transitions. [2021-06-12 20:01:47,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:47,482 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:47,482 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:47,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2490 [2021-06-12 20:01:47,683 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:47,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:47,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1979001065, now seen corresponding path program 490 times [2021-06-12 20:01:47,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:47,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329631040] [2021-06-12 20:01:47,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:47,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:47,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:47,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329631040] [2021-06-12 20:01:47,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329631040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:47,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141783874] [2021-06-12 20:01:47,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:47,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:47,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:47,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:47,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:47,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:47,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:47,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:47,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:47,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-06-12 20:01:47,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:47,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:47,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:47,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:01:47,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:47,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:47,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:47,981 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:35, output treesize:7 [2021-06-12 20:01:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:48,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141783874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:48,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:48,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:48,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844107329] [2021-06-12 20:01:48,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:48,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:48,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:48,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:48,012 INFO L87 Difference]: Start difference. First operand 471 states and 1480 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:48,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:48,484 INFO L93 Difference]: Finished difference Result 701 states and 2153 transitions. [2021-06-12 20:01:48,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:01:48,484 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:48,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:48,485 INFO L225 Difference]: With dead ends: 701 [2021-06-12 20:01:48,485 INFO L226 Difference]: Without dead ends: 680 [2021-06-12 20:01:48,486 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 427.8ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:01:48,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-06-12 20:01:48,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 477. [2021-06-12 20:01:48,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.153361344537815) internal successors, (1501), 476 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:48,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1501 transitions. [2021-06-12 20:01:48,491 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1501 transitions. Word has length 21 [2021-06-12 20:01:48,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:48,491 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1501 transitions. [2021-06-12 20:01:48,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:48,492 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1501 transitions. [2021-06-12 20:01:48,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:48,492 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:48,492 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:48,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2494,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:48,693 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:48,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:48,693 INFO L82 PathProgramCache]: Analyzing trace with hash 986038069, now seen corresponding path program 491 times [2021-06-12 20:01:48,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:48,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461725193] [2021-06-12 20:01:48,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:48,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:48,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461725193] [2021-06-12 20:01:48,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461725193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:48,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015511543] [2021-06-12 20:01:48,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:48,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:01:48,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:48,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:01:48,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:48,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:48,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:48,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:48,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:48,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:48,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:48,912 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:48,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:48,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:01:48,935 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-06-12 20:01:48,992 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-06-12 20:01:48,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:48,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:48,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:48,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:48,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:48,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:49,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:49,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:49,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:49,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:49,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:01:49,028 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:49,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:49,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:01:49,031 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:49,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:49,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:49,055 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:87, output treesize:31 [2021-06-12 20:01:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:49,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015511543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:49,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:49,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:49,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862052195] [2021-06-12 20:01:49,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:49,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:49,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:49,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:49,133 INFO L87 Difference]: Start difference. First operand 477 states and 1501 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:49,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:49,450 INFO L93 Difference]: Finished difference Result 602 states and 1853 transitions. [2021-06-12 20:01:49,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:49,451 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:49,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:49,452 INFO L225 Difference]: With dead ends: 602 [2021-06-12 20:01:49,452 INFO L226 Difference]: Without dead ends: 581 [2021-06-12 20:01:49,452 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 337.9ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:01:49,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-06-12 20:01:49,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 474. [2021-06-12 20:01:49,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.1479915433403804) internal successors, (1489), 473 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:49,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1489 transitions. [2021-06-12 20:01:49,457 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1489 transitions. Word has length 21 [2021-06-12 20:01:49,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:49,457 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1489 transitions. [2021-06-12 20:01:49,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:49,457 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1489 transitions. [2021-06-12 20:01:49,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:49,458 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:49,458 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:49,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2497 [2021-06-12 20:01:49,658 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:49,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:49,658 INFO L82 PathProgramCache]: Analyzing trace with hash 70956581, now seen corresponding path program 492 times [2021-06-12 20:01:49,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:49,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315615562] [2021-06-12 20:01:49,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:49,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:49,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315615562] [2021-06-12 20:01:49,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315615562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:49,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118125876] [2021-06-12 20:01:49,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:49,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:01:49,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:49,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:49,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:49,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:49,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:49,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:49,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:49,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-06-12 20:01:49,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:49,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:49,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:49,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:49,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:49,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:01:49,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:49,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:49,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:49,881 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:10 [2021-06-12 20:01:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:49,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118125876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:49,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:49,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:49,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343870338] [2021-06-12 20:01:49,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:49,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:49,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:49,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:49,927 INFO L87 Difference]: Start difference. First operand 474 states and 1489 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:50,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:50,258 INFO L93 Difference]: Finished difference Result 679 states and 2087 transitions. [2021-06-12 20:01:50,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:01:50,258 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:50,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:50,259 INFO L225 Difference]: With dead ends: 679 [2021-06-12 20:01:50,259 INFO L226 Difference]: Without dead ends: 658 [2021-06-12 20:01:50,259 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 272.1ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:01:50,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-06-12 20:01:50,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 470. [2021-06-12 20:01:50,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.1471215351812365) internal successors, (1476), 469 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:50,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1476 transitions. [2021-06-12 20:01:50,265 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1476 transitions. Word has length 21 [2021-06-12 20:01:50,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:50,265 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1476 transitions. [2021-06-12 20:01:50,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:50,265 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1476 transitions. [2021-06-12 20:01:50,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:50,266 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:50,266 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:50,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2505,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:50,466 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:50,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:50,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1460904125, now seen corresponding path program 493 times [2021-06-12 20:01:50,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:50,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885071343] [2021-06-12 20:01:50,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:50,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:50,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:50,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:50,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885071343] [2021-06-12 20:01:50,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885071343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:50,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594790656] [2021-06-12 20:01:50,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:50,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:50,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:50,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:50,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:50,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:50,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:50,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-06-12 20:01:50,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:01:50,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:50,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:01:50,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:50,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:50,635 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:50,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:50,636 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-06-12 20:01:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:50,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594790656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:50,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:50,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:01:50,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676137082] [2021-06-12 20:01:50,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:01:50,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:50,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:01:50,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:01:50,670 INFO L87 Difference]: Start difference. First operand 470 states and 1476 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:50,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:50,842 INFO L93 Difference]: Finished difference Result 710 states and 2179 transitions. [2021-06-12 20:01:50,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:50,842 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:50,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:50,843 INFO L225 Difference]: With dead ends: 710 [2021-06-12 20:01:50,843 INFO L226 Difference]: Without dead ends: 663 [2021-06-12 20:01:50,843 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:50,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-12 20:01:50,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 473. [2021-06-12 20:01:50,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.1588983050847457) internal successors, (1491), 472 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:50,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1491 transitions. [2021-06-12 20:01:50,849 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1491 transitions. Word has length 21 [2021-06-12 20:01:50,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:50,849 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1491 transitions. [2021-06-12 20:01:50,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:50,849 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1491 transitions. [2021-06-12 20:01:50,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:50,850 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:50,850 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:51,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2507,494 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:51,050 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:51,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:51,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1163637715, now seen corresponding path program 494 times [2021-06-12 20:01:51,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:51,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137067191] [2021-06-12 20:01:51,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:51,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:51,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:51,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137067191] [2021-06-12 20:01:51,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137067191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:51,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460120471] [2021-06-12 20:01:51,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:51,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:51,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:51,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:51,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:51,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:51,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:51,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:51,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:51,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:51,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:51,192 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:01:51,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:51,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:51,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:51,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:51,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:51,240 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:51,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:51,241 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:19 [2021-06-12 20:01:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:51,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460120471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:51,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:51,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:01:51,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624246235] [2021-06-12 20:01:51,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:01:51,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:51,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:01:51,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:51,292 INFO L87 Difference]: Start difference. First operand 473 states and 1491 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:51,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:51,519 INFO L93 Difference]: Finished difference Result 774 states and 2375 transitions. [2021-06-12 20:01:51,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:51,519 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:51,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:51,520 INFO L225 Difference]: With dead ends: 774 [2021-06-12 20:01:51,520 INFO L226 Difference]: Without dead ends: 751 [2021-06-12 20:01:51,520 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 219.5ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:51,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-06-12 20:01:51,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 498. [2021-06-12 20:01:51,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 3.1790744466800804) internal successors, (1580), 497 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:51,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1580 transitions. [2021-06-12 20:01:51,526 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1580 transitions. Word has length 21 [2021-06-12 20:01:51,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:51,526 INFO L482 AbstractCegarLoop]: Abstraction has 498 states and 1580 transitions. [2021-06-12 20:01:51,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:51,526 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1580 transitions. [2021-06-12 20:01:51,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:51,527 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:51,527 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:51,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2510 [2021-06-12 20:01:51,727 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:51,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:51,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1447900399, now seen corresponding path program 495 times [2021-06-12 20:01:51,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:51,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372241439] [2021-06-12 20:01:51,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:51,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:51,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:51,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372241439] [2021-06-12 20:01:51,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372241439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:51,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411352392] [2021-06-12 20:01:51,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:51,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:01:51,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:51,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:51,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:51,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:51,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:51,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:51,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:51,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:51,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:51,872 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:01:51,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:51,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:51,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:51,919 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:51,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:51,931 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:51,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:51,931 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:19 [2021-06-12 20:01:52,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:52,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411352392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:52,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:52,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:01:52,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043755169] [2021-06-12 20:01:52,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:52,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:52,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:52,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:52,005 INFO L87 Difference]: Start difference. First operand 498 states and 1580 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:52,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:52,466 INFO L93 Difference]: Finished difference Result 877 states and 2704 transitions. [2021-06-12 20:01:52,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:01:52,466 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:52,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:52,467 INFO L225 Difference]: With dead ends: 877 [2021-06-12 20:01:52,467 INFO L226 Difference]: Without dead ends: 850 [2021-06-12 20:01:52,468 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 410.7ms TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:01:52,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-06-12 20:01:52,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 516. [2021-06-12 20:01:52,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 3.18252427184466) internal successors, (1639), 515 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:52,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1639 transitions. [2021-06-12 20:01:52,474 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1639 transitions. Word has length 21 [2021-06-12 20:01:52,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:52,474 INFO L482 AbstractCegarLoop]: Abstraction has 516 states and 1639 transitions. [2021-06-12 20:01:52,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:52,474 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1639 transitions. [2021-06-12 20:01:52,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:52,475 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:52,475 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:52,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2517,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:52,676 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:52,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:52,676 INFO L82 PathProgramCache]: Analyzing trace with hash 886319931, now seen corresponding path program 496 times [2021-06-12 20:01:52,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:52,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956680064] [2021-06-12 20:01:52,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:52,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:52,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:52,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:52,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956680064] [2021-06-12 20:01:52,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956680064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:52,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492169207] [2021-06-12 20:01:52,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:52,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:52,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:52,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:52,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:52,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:52,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:52,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:52,811 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:52,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:52,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:52,817 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:01:52,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:52,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:52,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:52,868 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:52,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:52,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:01:52,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:52,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492169207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:52,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:52,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:01:52,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93617744] [2021-06-12 20:01:52,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:01:52,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:52,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:01:52,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:01:52,886 INFO L87 Difference]: Start difference. First operand 516 states and 1639 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:53,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:53,032 INFO L93 Difference]: Finished difference Result 768 states and 2376 transitions. [2021-06-12 20:01:53,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:53,032 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:53,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:53,033 INFO L225 Difference]: With dead ends: 768 [2021-06-12 20:01:53,033 INFO L226 Difference]: Without dead ends: 749 [2021-06-12 20:01:53,034 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:53,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-06-12 20:01:53,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 514. [2021-06-12 20:01:53,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 3.185185185185185) internal successors, (1634), 513 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:53,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1634 transitions. [2021-06-12 20:01:53,039 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1634 transitions. Word has length 21 [2021-06-12 20:01:53,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:53,040 INFO L482 AbstractCegarLoop]: Abstraction has 514 states and 1634 transitions. [2021-06-12 20:01:53,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:53,040 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1634 transitions. [2021-06-12 20:01:53,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:53,040 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:53,040 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:53,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2527 [2021-06-12 20:01:53,241 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:53,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:53,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1431692585, now seen corresponding path program 497 times [2021-06-12 20:01:53,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:53,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088870661] [2021-06-12 20:01:53,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:53,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:53,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088870661] [2021-06-12 20:01:53,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088870661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:53,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894083908] [2021-06-12 20:01:53,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:53,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:01:53,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:53,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:53,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:53,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:53,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:53,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:53,376 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:53,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:53,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:53,383 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:01:53,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:53,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:53,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:53,458 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:53,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:53,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:01:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:53,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894083908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:53,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:53,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:01:53,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203783002] [2021-06-12 20:01:53,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:01:53,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:53,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:01:53,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:01:53,474 INFO L87 Difference]: Start difference. First operand 514 states and 1634 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:53,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:53,611 INFO L93 Difference]: Finished difference Result 772 states and 2383 transitions. [2021-06-12 20:01:53,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:53,612 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:53,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:53,613 INFO L225 Difference]: With dead ends: 772 [2021-06-12 20:01:53,613 INFO L226 Difference]: Without dead ends: 751 [2021-06-12 20:01:53,613 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 138.3ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:53,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-06-12 20:01:53,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 506. [2021-06-12 20:01:53,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.1782178217821784) internal successors, (1605), 505 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:53,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1605 transitions. [2021-06-12 20:01:53,619 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1605 transitions. Word has length 21 [2021-06-12 20:01:53,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:53,619 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1605 transitions. [2021-06-12 20:01:53,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:53,619 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1605 transitions. [2021-06-12 20:01:53,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:53,620 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:53,620 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:53,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 498 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2530 [2021-06-12 20:01:53,820 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:53,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:53,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1923558039, now seen corresponding path program 498 times [2021-06-12 20:01:53,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:53,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575360176] [2021-06-12 20:01:53,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:53,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:53,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:53,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:53,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575360176] [2021-06-12 20:01:53,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575360176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:53,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724432378] [2021-06-12 20:01:53,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:53,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:01:53,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:53,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:53,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:53,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:53,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:53,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:53,947 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:53,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:53,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:53,954 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:01:53,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:53,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:53,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:53,987 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:53,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:53,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:01:54,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:54,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724432378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:54,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:54,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:01:54,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666227712] [2021-06-12 20:01:54,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:01:54,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:54,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:01:54,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:54,029 INFO L87 Difference]: Start difference. First operand 506 states and 1605 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:54,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:54,389 INFO L93 Difference]: Finished difference Result 906 states and 2767 transitions. [2021-06-12 20:01:54,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:01:54,390 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:54,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:54,391 INFO L225 Difference]: With dead ends: 906 [2021-06-12 20:01:54,391 INFO L226 Difference]: Without dead ends: 887 [2021-06-12 20:01:54,391 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 251.3ms TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:01:54,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2021-06-12 20:01:54,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 484. [2021-06-12 20:01:54,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.1614906832298137) internal successors, (1527), 483 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:54,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1527 transitions. [2021-06-12 20:01:54,397 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1527 transitions. Word has length 21 [2021-06-12 20:01:54,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:54,397 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1527 transitions. [2021-06-12 20:01:54,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:54,397 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1527 transitions. [2021-06-12 20:01:54,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:54,398 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:54,398 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:54,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2534 [2021-06-12 20:01:54,599 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:54,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:54,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1186061807, now seen corresponding path program 499 times [2021-06-12 20:01:54,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:54,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106964334] [2021-06-12 20:01:54,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:54,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:54,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106964334] [2021-06-12 20:01:54,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106964334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:54,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074969132] [2021-06-12 20:01:54,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:54,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:54,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:54,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:54,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:54,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:01:54,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:54,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:54,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:54,733 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:01:54,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:54,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:54,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:54,758 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:54,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:54,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:01:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:54,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074969132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:54,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:54,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:01:54,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413008280] [2021-06-12 20:01:54,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:01:54,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:54,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:01:54,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:01:54,769 INFO L87 Difference]: Start difference. First operand 484 states and 1527 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:54,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:54,930 INFO L93 Difference]: Finished difference Result 847 states and 2585 transitions. [2021-06-12 20:01:54,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:54,930 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:54,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:54,931 INFO L225 Difference]: With dead ends: 847 [2021-06-12 20:01:54,931 INFO L226 Difference]: Without dead ends: 826 [2021-06-12 20:01:54,931 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:54,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-06-12 20:01:54,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 477. [2021-06-12 20:01:54,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.1596638655462184) internal successors, (1504), 476 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:54,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1504 transitions. [2021-06-12 20:01:54,937 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1504 transitions. Word has length 21 [2021-06-12 20:01:54,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:54,938 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1504 transitions. [2021-06-12 20:01:54,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:54,938 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1504 transitions. [2021-06-12 20:01:54,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:54,938 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:54,938 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:55,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2537 [2021-06-12 20:01:55,139 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:55,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:55,139 INFO L82 PathProgramCache]: Analyzing trace with hash 571602225, now seen corresponding path program 500 times [2021-06-12 20:01:55,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:55,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708084720] [2021-06-12 20:01:55,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:55,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:55,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:55,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708084720] [2021-06-12 20:01:55,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708084720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:55,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377072093] [2021-06-12 20:01:55,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:55,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:55,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:55,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:55,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:55,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:55,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:55,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:55,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:55,300 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:01:55,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:55,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:55,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:55,333 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:01:55,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:55,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:01:55,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:55,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377072093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:55,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:55,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:01:55,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450521777] [2021-06-12 20:01:55,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:01:55,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:55,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:01:55,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:55,361 INFO L87 Difference]: Start difference. First operand 477 states and 1504 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:55,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:55,691 INFO L93 Difference]: Finished difference Result 721 states and 2218 transitions. [2021-06-12 20:01:55,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:01:55,691 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:55,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:55,692 INFO L225 Difference]: With dead ends: 721 [2021-06-12 20:01:55,692 INFO L226 Difference]: Without dead ends: 700 [2021-06-12 20:01:55,693 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 281.2ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:55,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-06-12 20:01:55,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 483. [2021-06-12 20:01:55,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 3.1514522821576763) internal successors, (1519), 482 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:55,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1519 transitions. [2021-06-12 20:01:55,700 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1519 transitions. Word has length 21 [2021-06-12 20:01:55,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:55,700 INFO L482 AbstractCegarLoop]: Abstraction has 483 states and 1519 transitions. [2021-06-12 20:01:55,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:55,700 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1519 transitions. [2021-06-12 20:01:55,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:55,701 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:55,701 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:55,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2541 [2021-06-12 20:01:55,901 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:55,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:55,902 INFO L82 PathProgramCache]: Analyzing trace with hash -758325937, now seen corresponding path program 501 times [2021-06-12 20:01:55,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:55,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25585995] [2021-06-12 20:01:55,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:55,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:55,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:55,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25585995] [2021-06-12 20:01:55,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25585995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:55,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516546306] [2021-06-12 20:01:55,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:56,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:01:56,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:56,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:56,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:56,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:56,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:56,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:56,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:56,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:01:56,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:56,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:56,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:56,072 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:01:56,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:56,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:01:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:56,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516546306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:56,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:56,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:01:56,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666507452] [2021-06-12 20:01:56,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:01:56,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:56,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:01:56,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:56,125 INFO L87 Difference]: Start difference. First operand 483 states and 1519 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:56,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:56,429 INFO L93 Difference]: Finished difference Result 715 states and 2203 transitions. [2021-06-12 20:01:56,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:01:56,430 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:56,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:56,431 INFO L225 Difference]: With dead ends: 715 [2021-06-12 20:01:56,431 INFO L226 Difference]: Without dead ends: 694 [2021-06-12 20:01:56,431 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 288.7ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:56,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-06-12 20:01:56,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 480. [2021-06-12 20:01:56,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.1461377870563676) internal successors, (1507), 479 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:56,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1507 transitions. [2021-06-12 20:01:56,436 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1507 transitions. Word has length 21 [2021-06-12 20:01:56,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:56,437 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1507 transitions. [2021-06-12 20:01:56,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:56,437 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1507 transitions. [2021-06-12 20:01:56,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:56,437 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:56,437 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:56,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2543 [2021-06-12 20:01:56,638 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:56,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:56,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1673407425, now seen corresponding path program 502 times [2021-06-12 20:01:56,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:56,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343686268] [2021-06-12 20:01:56,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:56,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:56,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343686268] [2021-06-12 20:01:56,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343686268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:56,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38645218] [2021-06-12 20:01:56,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:56,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:56,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:56,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:56,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:56,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:56,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:56,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:56,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:56,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:01:56,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:56,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:56,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:56,820 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:56,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:56,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:01:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:56,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38645218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:56,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:56,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:01:56,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107524212] [2021-06-12 20:01:56,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:56,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:56,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:56,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:56,863 INFO L87 Difference]: Start difference. First operand 480 states and 1507 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:57,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:57,141 INFO L93 Difference]: Finished difference Result 695 states and 2136 transitions. [2021-06-12 20:01:57,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:01:57,141 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:57,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:57,142 INFO L225 Difference]: With dead ends: 695 [2021-06-12 20:01:57,142 INFO L226 Difference]: Without dead ends: 674 [2021-06-12 20:01:57,142 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 242.2ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:57,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-06-12 20:01:57,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 477. [2021-06-12 20:01:57,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.1470588235294117) internal successors, (1498), 476 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:57,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1498 transitions. [2021-06-12 20:01:57,148 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1498 transitions. Word has length 21 [2021-06-12 20:01:57,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:57,148 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1498 transitions. [2021-06-12 20:01:57,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:57,148 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1498 transitions. [2021-06-12 20:01:57,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:57,149 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:57,149 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:57,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 503 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2545 [2021-06-12 20:01:57,349 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:57,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:57,349 INFO L82 PathProgramCache]: Analyzing trace with hash -188318099, now seen corresponding path program 503 times [2021-06-12 20:01:57,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:57,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420396631] [2021-06-12 20:01:57,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:57,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:57,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:57,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420396631] [2021-06-12 20:01:57,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420396631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:57,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545959147] [2021-06-12 20:01:57,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:57,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:01:57,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:57,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:01:57,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:57,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:57,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:57,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:57,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:57,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 20:01:57,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:57,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:57,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:57,514 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:57,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:57,528 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:57,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:57,528 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:31 [2021-06-12 20:01:57,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:57,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545959147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:57,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:57,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:01:57,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865108736] [2021-06-12 20:01:57,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:01:57,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:57,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:01:57,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:57,600 INFO L87 Difference]: Start difference. First operand 477 states and 1498 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:57,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:57,843 INFO L93 Difference]: Finished difference Result 720 states and 2178 transitions. [2021-06-12 20:01:57,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:57,843 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:57,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:57,844 INFO L225 Difference]: With dead ends: 720 [2021-06-12 20:01:57,844 INFO L226 Difference]: Without dead ends: 699 [2021-06-12 20:01:57,844 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 224.8ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:57,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-06-12 20:01:57,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 450. [2021-06-12 20:01:57,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 3.1224944320712695) internal successors, (1402), 449 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:57,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1402 transitions. [2021-06-12 20:01:57,849 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1402 transitions. Word has length 21 [2021-06-12 20:01:57,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:57,849 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 1402 transitions. [2021-06-12 20:01:57,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:57,849 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1402 transitions. [2021-06-12 20:01:57,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:57,850 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:57,850 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:58,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2547,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:58,050 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:58,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:58,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1659004613, now seen corresponding path program 504 times [2021-06-12 20:01:58,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:58,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385521512] [2021-06-12 20:01:58,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:58,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:58,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385521512] [2021-06-12 20:01:58,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385521512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:58,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268841629] [2021-06-12 20:01:58,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:58,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:01:58,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:58,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:58,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:58,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:58,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:58,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:58,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:58,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 20:01:58,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:58,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:58,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:58,179 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:58,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:58,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:01:58,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:58,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268841629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:58,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:58,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:01:58,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076166829] [2021-06-12 20:01:58,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:01:58,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:58,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:01:58,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:01:58,188 INFO L87 Difference]: Start difference. First operand 450 states and 1402 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:58,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:58,315 INFO L93 Difference]: Finished difference Result 714 states and 2155 transitions. [2021-06-12 20:01:58,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:58,316 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:58,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:58,317 INFO L225 Difference]: With dead ends: 714 [2021-06-12 20:01:58,317 INFO L226 Difference]: Without dead ends: 692 [2021-06-12 20:01:58,317 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:58,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-06-12 20:01:58,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 453. [2021-06-12 20:01:58,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 3.1216814159292037) internal successors, (1411), 452 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:58,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1411 transitions. [2021-06-12 20:01:58,322 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1411 transitions. Word has length 21 [2021-06-12 20:01:58,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:58,322 INFO L482 AbstractCegarLoop]: Abstraction has 453 states and 1411 transitions. [2021-06-12 20:01:58,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:58,322 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1411 transitions. [2021-06-12 20:01:58,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:58,322 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:58,322 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:58,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2552 [2021-06-12 20:01:58,523 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:58,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:58,523 INFO L82 PathProgramCache]: Analyzing trace with hash -283695579, now seen corresponding path program 505 times [2021-06-12 20:01:58,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:58,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379904758] [2021-06-12 20:01:58,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:58,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:58,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:58,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379904758] [2021-06-12 20:01:58,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379904758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:58,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131071242] [2021-06-12 20:01:58,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:58,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:58,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:58,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:58,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:58,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:58,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:58,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 20:01:58,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:58,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:58,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:58,667 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:58,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:58,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:01:58,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:58,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131071242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:58,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:58,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:01:58,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616993018] [2021-06-12 20:01:58,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:01:58,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:58,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:01:58,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:01:58,677 INFO L87 Difference]: Start difference. First operand 453 states and 1411 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:58,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:58,811 INFO L93 Difference]: Finished difference Result 651 states and 1975 transitions. [2021-06-12 20:01:58,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:58,812 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:58,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:58,813 INFO L225 Difference]: With dead ends: 651 [2021-06-12 20:01:58,813 INFO L226 Difference]: Without dead ends: 629 [2021-06-12 20:01:58,813 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:58,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-12 20:01:58,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 459. [2021-06-12 20:01:58,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 3.126637554585153) internal successors, (1432), 458 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:58,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1432 transitions. [2021-06-12 20:01:58,818 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1432 transitions. Word has length 21 [2021-06-12 20:01:58,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:58,818 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 1432 transitions. [2021-06-12 20:01:58,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:58,818 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1432 transitions. [2021-06-12 20:01:58,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:58,819 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:58,819 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:59,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2554 [2021-06-12 20:01:59,019 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:59,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:59,020 INFO L82 PathProgramCache]: Analyzing trace with hash -785486915, now seen corresponding path program 506 times [2021-06-12 20:01:59,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:59,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904704692] [2021-06-12 20:01:59,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:59,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:59,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:59,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904704692] [2021-06-12 20:01:59,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904704692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:59,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840675441] [2021-06-12 20:01:59,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:59,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:59,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:59,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:59,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:59,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:59,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:59,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:59,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:59,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 20:01:59,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:59,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:59,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:59,152 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:59,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:59,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:01:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:59,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840675441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:59,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:59,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:01:59,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020022041] [2021-06-12 20:01:59,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:01:59,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:59,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:01:59,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:01:59,184 INFO L87 Difference]: Start difference. First operand 459 states and 1432 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:59,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:59,322 INFO L93 Difference]: Finished difference Result 660 states and 1999 transitions. [2021-06-12 20:01:59,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:59,322 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:59,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:59,323 INFO L225 Difference]: With dead ends: 660 [2021-06-12 20:01:59,323 INFO L226 Difference]: Without dead ends: 638 [2021-06-12 20:01:59,323 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 98.1ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:59,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-06-12 20:01:59,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 456. [2021-06-12 20:01:59,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.120879120879121) internal successors, (1420), 455 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:59,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1420 transitions. [2021-06-12 20:01:59,328 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1420 transitions. Word has length 21 [2021-06-12 20:01:59,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:59,328 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1420 transitions. [2021-06-12 20:01:59,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:59,328 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1420 transitions. [2021-06-12 20:01:59,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:59,329 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:59,329 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:59,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2559,507 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:59,529 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:59,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:59,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1402696261, now seen corresponding path program 507 times [2021-06-12 20:01:59,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:59,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301242840] [2021-06-12 20:01:59,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:59,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:59,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:59,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301242840] [2021-06-12 20:01:59,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301242840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:59,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113028668] [2021-06-12 20:01:59,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:59,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:01:59,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:59,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:01:59,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:59,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:59,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:59,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:59,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:59,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 20:01:59,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:59,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:59,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:59,660 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:01:59,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:59,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:01:59,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:59,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113028668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:59,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:59,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:01:59,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102455832] [2021-06-12 20:01:59,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:01:59,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:59,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:01:59,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:01:59,691 INFO L87 Difference]: Start difference. First operand 456 states and 1420 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:59,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:59,836 INFO L93 Difference]: Finished difference Result 648 states and 1966 transitions. [2021-06-12 20:01:59,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:01:59,837 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:01:59,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:59,838 INFO L225 Difference]: With dead ends: 648 [2021-06-12 20:01:59,838 INFO L226 Difference]: Without dead ends: 626 [2021-06-12 20:01:59,838 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 94.3ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:59,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-06-12 20:01:59,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 450. [2021-06-12 20:01:59,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 3.1224944320712695) internal successors, (1402), 449 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:59,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1402 transitions. [2021-06-12 20:01:59,843 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1402 transitions. Word has length 21 [2021-06-12 20:01:59,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:59,843 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 1402 transitions. [2021-06-12 20:01:59,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:59,843 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1402 transitions. [2021-06-12 20:01:59,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:01:59,844 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:59,844 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:00,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2561,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:00,044 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:00,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:00,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1973638483, now seen corresponding path program 508 times [2021-06-12 20:02:00,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:00,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412133307] [2021-06-12 20:02:00,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:00,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:00,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:00,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412133307] [2021-06-12 20:02:00,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412133307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:00,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927624828] [2021-06-12 20:02:00,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:00,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:00,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:00,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:00,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:00,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:00,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:00,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:00,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:00,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 20:02:00,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:00,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:00,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:00,203 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:00,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:00,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:02:00,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:00,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927624828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:00,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:00,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:02:00,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544701942] [2021-06-12 20:02:00,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:02:00,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:00,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:02:00,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:02:00,214 INFO L87 Difference]: Start difference. First operand 450 states and 1402 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:00,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:00,358 INFO L93 Difference]: Finished difference Result 669 states and 2029 transitions. [2021-06-12 20:02:00,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:00,358 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:00,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:00,359 INFO L225 Difference]: With dead ends: 669 [2021-06-12 20:02:00,359 INFO L226 Difference]: Without dead ends: 647 [2021-06-12 20:02:00,359 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:02:00,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-06-12 20:02:00,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 459. [2021-06-12 20:02:00,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 3.126637554585153) internal successors, (1432), 458 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:00,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1432 transitions. [2021-06-12 20:02:00,364 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1432 transitions. Word has length 21 [2021-06-12 20:02:00,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:00,364 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 1432 transitions. [2021-06-12 20:02:00,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:00,364 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1432 transitions. [2021-06-12 20:02:00,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:00,365 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:00,365 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:00,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2563 [2021-06-12 20:02:00,565 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:00,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:00,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1819537477, now seen corresponding path program 509 times [2021-06-12 20:02:00,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:00,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461753317] [2021-06-12 20:02:00,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:00,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:00,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:00,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461753317] [2021-06-12 20:02:00,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461753317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:00,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011120189] [2021-06-12 20:02:00,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:00,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:00,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:00,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:00,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:00,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:00,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:00,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:00,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:00,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 20:02:00,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:00,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:00,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:00,725 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:00,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:00,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:02:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:00,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011120189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:00,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:00,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:02:00,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502667956] [2021-06-12 20:02:00,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:02:00,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:00,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:02:00,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:02:00,740 INFO L87 Difference]: Start difference. First operand 459 states and 1432 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:00,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:00,900 INFO L93 Difference]: Finished difference Result 678 states and 2053 transitions. [2021-06-12 20:02:00,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:00,901 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:00,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:00,902 INFO L225 Difference]: With dead ends: 678 [2021-06-12 20:02:00,902 INFO L226 Difference]: Without dead ends: 656 [2021-06-12 20:02:00,902 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:02:00,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-06-12 20:02:00,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 456. [2021-06-12 20:02:00,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.120879120879121) internal successors, (1420), 455 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:00,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1420 transitions. [2021-06-12 20:02:00,909 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1420 transitions. Word has length 21 [2021-06-12 20:02:00,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:00,909 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1420 transitions. [2021-06-12 20:02:00,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:00,909 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1420 transitions. [2021-06-12 20:02:00,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:00,910 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:00,910 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:01,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2568 [2021-06-12 20:02:01,125 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:01,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:01,125 INFO L82 PathProgramCache]: Analyzing trace with hash -287246643, now seen corresponding path program 510 times [2021-06-12 20:02:01,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:01,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172544242] [2021-06-12 20:02:01,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:01,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:01,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:01,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172544242] [2021-06-12 20:02:01,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172544242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:01,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372787308] [2021-06-12 20:02:01,182 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:01,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:02:01,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:01,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:01,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:01,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:01,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:01,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:01,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:01,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:02:01,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:01,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:01,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:01,268 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:01,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:01,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:02:01,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:01,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372787308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:01,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:01,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:02:01,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380032758] [2021-06-12 20:02:01,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:02:01,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:01,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:02:01,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:02:01,282 INFO L87 Difference]: Start difference. First operand 456 states and 1420 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:01,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:01,417 INFO L93 Difference]: Finished difference Result 666 states and 2020 transitions. [2021-06-12 20:02:01,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:01,417 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:01,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:01,418 INFO L225 Difference]: With dead ends: 666 [2021-06-12 20:02:01,418 INFO L226 Difference]: Without dead ends: 644 [2021-06-12 20:02:01,418 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:02:01,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-06-12 20:02:01,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 453. [2021-06-12 20:02:01,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 3.1216814159292037) internal successors, (1411), 452 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:01,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1411 transitions. [2021-06-12 20:02:01,423 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1411 transitions. Word has length 21 [2021-06-12 20:02:01,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:01,423 INFO L482 AbstractCegarLoop]: Abstraction has 453 states and 1411 transitions. [2021-06-12 20:02:01,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:01,423 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1411 transitions. [2021-06-12 20:02:01,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:01,424 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:01,424 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:01,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2570,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:01,624 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:01,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:01,624 INFO L82 PathProgramCache]: Analyzing trace with hash 752989155, now seen corresponding path program 511 times [2021-06-12 20:02:01,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:01,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731182113] [2021-06-12 20:02:01,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:01,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:01,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731182113] [2021-06-12 20:02:01,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731182113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:01,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954671580] [2021-06-12 20:02:01,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:01,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:01,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:01,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:01,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:01,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:01,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:01,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 20:02:01,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:01,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:01,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:01,750 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:01,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:01,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:02:01,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:01,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954671580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:01,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:01,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:02:01,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242430552] [2021-06-12 20:02:01,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:02:01,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:01,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:02:01,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:02:01,765 INFO L87 Difference]: Start difference. First operand 453 states and 1411 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:01,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:01,911 INFO L93 Difference]: Finished difference Result 744 states and 2248 transitions. [2021-06-12 20:02:01,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:01,911 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:01,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:01,912 INFO L225 Difference]: With dead ends: 744 [2021-06-12 20:02:01,912 INFO L226 Difference]: Without dead ends: 722 [2021-06-12 20:02:01,912 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:01,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-06-12 20:02:01,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 452. [2021-06-12 20:02:01,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.1330376940133036) internal successors, (1413), 451 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:01,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1413 transitions. [2021-06-12 20:02:01,918 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1413 transitions. Word has length 21 [2021-06-12 20:02:01,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:01,918 INFO L482 AbstractCegarLoop]: Abstraction has 452 states and 1413 transitions. [2021-06-12 20:02:01,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:01,918 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1413 transitions. [2021-06-12 20:02:01,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:01,918 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:01,918 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:02,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2572,512 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:02,119 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:02,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:02,119 INFO L82 PathProgramCache]: Analyzing trace with hash -666170479, now seen corresponding path program 512 times [2021-06-12 20:02:02,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:02,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403027677] [2021-06-12 20:02:02,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:02,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:02,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:02,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403027677] [2021-06-12 20:02:02,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403027677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:02,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019415561] [2021-06-12 20:02:02,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:02,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:02,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:02,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:02,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:02,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:02,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:02,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:02,314 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:02,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:02,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:02,318 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-12 20:02:02,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:02,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:02,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:02,367 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:02,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:02,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:02:02,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:02,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019415561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:02,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:02,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:02:02,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908443577] [2021-06-12 20:02:02,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:02:02,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:02,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:02:02,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:02:02,395 INFO L87 Difference]: Start difference. First operand 452 states and 1413 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:02,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:02,851 INFO L93 Difference]: Finished difference Result 951 states and 2864 transitions. [2021-06-12 20:02:02,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:02:02,852 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:02,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:02,853 INFO L225 Difference]: With dead ends: 951 [2021-06-12 20:02:02,853 INFO L226 Difference]: Without dead ends: 932 [2021-06-12 20:02:02,853 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 405.3ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:02:02,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-06-12 20:02:02,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 459. [2021-06-12 20:02:02,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 3.1331877729257642) internal successors, (1435), 458 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:02,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1435 transitions. [2021-06-12 20:02:02,860 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1435 transitions. Word has length 21 [2021-06-12 20:02:02,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:02,860 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 1435 transitions. [2021-06-12 20:02:02,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:02,860 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1435 transitions. [2021-06-12 20:02:02,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:02,860 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:02,860 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:03,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 513 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2574 [2021-06-12 20:02:03,061 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:03,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:03,061 INFO L82 PathProgramCache]: Analyzing trace with hash 290594643, now seen corresponding path program 513 times [2021-06-12 20:02:03,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:03,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770114365] [2021-06-12 20:02:03,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:03,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:03,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770114365] [2021-06-12 20:02:03,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770114365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:03,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730007253] [2021-06-12 20:02:03,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:03,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:02:03,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:03,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:03,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:03,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:03,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:03,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:03,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:03,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:15 [2021-06-12 20:02:03,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:03,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:03,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:02:03,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:03,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:03,236 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:03,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:03,236 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:5 [2021-06-12 20:02:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:03,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730007253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:03,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:03,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:02:03,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031879299] [2021-06-12 20:02:03,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:03,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:03,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:03,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:03,264 INFO L87 Difference]: Start difference. First operand 459 states and 1435 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:03,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:03,530 INFO L93 Difference]: Finished difference Result 951 states and 2867 transitions. [2021-06-12 20:02:03,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:02:03,530 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:03,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:03,531 INFO L225 Difference]: With dead ends: 951 [2021-06-12 20:02:03,531 INFO L226 Difference]: Without dead ends: 912 [2021-06-12 20:02:03,532 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 186.4ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:03,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2021-06-12 20:02:03,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 466. [2021-06-12 20:02:03,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.1376344086021506) internal successors, (1459), 465 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:03,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1459 transitions. [2021-06-12 20:02:03,538 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1459 transitions. Word has length 21 [2021-06-12 20:02:03,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:03,538 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1459 transitions. [2021-06-12 20:02:03,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:03,538 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1459 transitions. [2021-06-12 20:02:03,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:03,538 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:03,538 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:03,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2577,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:03,739 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:03,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:03,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1686096625, now seen corresponding path program 514 times [2021-06-12 20:02:03,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:03,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530145888] [2021-06-12 20:02:03,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:03,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:03,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:03,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530145888] [2021-06-12 20:02:03,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530145888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:03,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119474199] [2021-06-12 20:02:03,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:03,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:03,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:03,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:03,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:03,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:03,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:03,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:03,884 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:03,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:03,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:03,887 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-12 20:02:03,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:03,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:03,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:03,934 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:03,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:03,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:02:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:03,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119474199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:03,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:03,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:02:03,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760260015] [2021-06-12 20:02:03,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:02:03,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:03,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:02:03,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:02:03,962 INFO L87 Difference]: Start difference. First operand 466 states and 1459 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:04,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:04,716 INFO L93 Difference]: Finished difference Result 1196 states and 3629 transitions. [2021-06-12 20:02:04,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:02:04,717 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:04,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:04,718 INFO L225 Difference]: With dead ends: 1196 [2021-06-12 20:02:04,718 INFO L226 Difference]: Without dead ends: 1177 [2021-06-12 20:02:04,719 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 642.6ms TimeCoverageRelationStatistics Valid=263, Invalid=1069, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:02:04,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-06-12 20:02:04,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 468. [2021-06-12 20:02:04,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.1349036402569594) internal successors, (1464), 467 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:04,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1464 transitions. [2021-06-12 20:02:04,726 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1464 transitions. Word has length 21 [2021-06-12 20:02:04,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:04,726 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1464 transitions. [2021-06-12 20:02:04,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:04,726 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1464 transitions. [2021-06-12 20:02:04,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:04,727 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:04,727 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:04,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2580,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:04,927 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:04,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:04,928 INFO L82 PathProgramCache]: Analyzing trace with hash -922478831, now seen corresponding path program 515 times [2021-06-12 20:02:04,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:04,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031582689] [2021-06-12 20:02:04,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:05,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:05,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031582689] [2021-06-12 20:02:05,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031582689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:05,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046727954] [2021-06-12 20:02:05,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:05,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:05,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:05,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:05,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:05,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:05,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:05,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:05,101 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:05,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:05,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:05,104 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-12 20:02:05,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:05,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:05,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:05,137 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:05,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:05,143 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:05,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:05,143 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:13 [2021-06-12 20:02:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:05,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046727954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:05,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:05,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:02:05,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198372257] [2021-06-12 20:02:05,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:02:05,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:05,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:02:05,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:02:05,191 INFO L87 Difference]: Start difference. First operand 468 states and 1464 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:05,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:05,742 INFO L93 Difference]: Finished difference Result 1066 states and 3233 transitions. [2021-06-12 20:02:05,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:02:05,742 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:05,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:05,744 INFO L225 Difference]: With dead ends: 1066 [2021-06-12 20:02:05,744 INFO L226 Difference]: Without dead ends: 1043 [2021-06-12 20:02:05,744 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 387.0ms TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:02:05,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2021-06-12 20:02:05,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 480. [2021-06-12 20:02:05,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.164926931106472) internal successors, (1516), 479 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:05,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1516 transitions. [2021-06-12 20:02:05,751 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1516 transitions. Word has length 21 [2021-06-12 20:02:05,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:05,751 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1516 transitions. [2021-06-12 20:02:05,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:05,751 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1516 transitions. [2021-06-12 20:02:05,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:05,751 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:05,752 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:05,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2583,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:05,952 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:05,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:05,952 INFO L82 PathProgramCache]: Analyzing trace with hash 418639447, now seen corresponding path program 516 times [2021-06-12 20:02:05,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:05,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627119620] [2021-06-12 20:02:05,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:05,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:06,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:06,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:06,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627119620] [2021-06-12 20:02:06,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627119620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:06,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314176394] [2021-06-12 20:02:06,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:06,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:02:06,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:06,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:06,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:06,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:06,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:06,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:06,111 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:06,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:06,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:06,118 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:02:06,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:06,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:06,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:06,155 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:06,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:06,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:02:06,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:06,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314176394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:06,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:06,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:02:06,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466513510] [2021-06-12 20:02:06,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:02:06,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:06,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:02:06,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:02:06,183 INFO L87 Difference]: Start difference. First operand 480 states and 1516 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:06,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:06,602 INFO L93 Difference]: Finished difference Result 814 states and 2490 transitions. [2021-06-12 20:02:06,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:02:06,602 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:06,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:06,604 INFO L225 Difference]: With dead ends: 814 [2021-06-12 20:02:06,604 INFO L226 Difference]: Without dead ends: 795 [2021-06-12 20:02:06,604 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 331.3ms TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:02:06,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2021-06-12 20:02:06,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 487. [2021-06-12 20:02:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.168724279835391) internal successors, (1540), 486 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:06,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1540 transitions. [2021-06-12 20:02:06,610 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1540 transitions. Word has length 21 [2021-06-12 20:02:06,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:06,610 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1540 transitions. [2021-06-12 20:02:06,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:06,610 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1540 transitions. [2021-06-12 20:02:06,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:06,610 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:06,610 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:06,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2587 [2021-06-12 20:02:06,811 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:06,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:06,811 INFO L82 PathProgramCache]: Analyzing trace with hash 196430835, now seen corresponding path program 517 times [2021-06-12 20:02:06,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:06,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424544412] [2021-06-12 20:02:06,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:06,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:06,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:06,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424544412] [2021-06-12 20:02:06,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424544412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:06,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278733333] [2021-06-12 20:02:06,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:06,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:06,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:06,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:06,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:06,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:06,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:06,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:06,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 20:02:07,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:07,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:07,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:02:07,004 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:07,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:07,006 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:07,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:07,007 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:5 [2021-06-12 20:02:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:07,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278733333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:07,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:07,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:02:07,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832059930] [2021-06-12 20:02:07,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:02:07,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:07,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:02:07,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:02:07,034 INFO L87 Difference]: Start difference. First operand 487 states and 1540 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:07,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:07,573 INFO L93 Difference]: Finished difference Result 1028 states and 3127 transitions. [2021-06-12 20:02:07,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:02:07,574 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:07,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:07,575 INFO L225 Difference]: With dead ends: 1028 [2021-06-12 20:02:07,575 INFO L226 Difference]: Without dead ends: 968 [2021-06-12 20:02:07,575 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 405.6ms TimeCoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:02:07,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-06-12 20:02:07,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 493. [2021-06-12 20:02:07,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.1686991869918697) internal successors, (1559), 492 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:07,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1559 transitions. [2021-06-12 20:02:07,582 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1559 transitions. Word has length 21 [2021-06-12 20:02:07,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:07,582 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1559 transitions. [2021-06-12 20:02:07,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:07,582 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1559 transitions. [2021-06-12 20:02:07,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:07,582 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:07,583 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:07,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2590,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:07,783 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:07,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:07,783 INFO L82 PathProgramCache]: Analyzing trace with hash 2105031287, now seen corresponding path program 518 times [2021-06-12 20:02:07,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:07,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837876315] [2021-06-12 20:02:07,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:07,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:07,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837876315] [2021-06-12 20:02:07,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837876315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:07,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872074046] [2021-06-12 20:02:07,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:07,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:07,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:07,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:07,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:07,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:07,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:07,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:07,944 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:07,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:07,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:07,951 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:02:07,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:07,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:07,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:07,983 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:07,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:07,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:07,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:07,991 INFO L518 ElimStorePlain]: Eliminatee v_prenex_111 vanished before elimination [2021-06-12 20:02:07,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:07,992 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:13 [2021-06-12 20:02:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:08,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872074046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:08,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:08,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:02:08,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75919972] [2021-06-12 20:02:08,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:02:08,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:08,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:02:08,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:02:08,039 INFO L87 Difference]: Start difference. First operand 493 states and 1559 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:08,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:08,512 INFO L93 Difference]: Finished difference Result 897 states and 2749 transitions. [2021-06-12 20:02:08,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:02:08,513 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:08,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:08,514 INFO L225 Difference]: With dead ends: 897 [2021-06-12 20:02:08,514 INFO L226 Difference]: Without dead ends: 874 [2021-06-12 20:02:08,514 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 340.4ms TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:02:08,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-06-12 20:02:08,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 487. [2021-06-12 20:02:08,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.162551440329218) internal successors, (1537), 486 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:08,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1537 transitions. [2021-06-12 20:02:08,521 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1537 transitions. Word has length 21 [2021-06-12 20:02:08,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:08,521 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1537 transitions. [2021-06-12 20:02:08,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:08,521 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1537 transitions. [2021-06-12 20:02:08,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:08,521 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:08,521 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:08,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2593 [2021-06-12 20:02:08,722 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:08,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:08,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1219233007, now seen corresponding path program 519 times [2021-06-12 20:02:08,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:08,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552171893] [2021-06-12 20:02:08,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:08,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:08,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:08,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552171893] [2021-06-12 20:02:08,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552171893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:08,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840074740] [2021-06-12 20:02:08,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:08,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:02:08,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:08,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:08,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:08,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:08,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:08,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:08,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:08,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 20:02:08,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:02:08,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:08,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:08,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:08,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:08,895 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:08,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:08,896 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:02:08,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:08,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840074740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:08,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:08,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 20:02:08,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919409356] [2021-06-12 20:02:08,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:08,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:08,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:08,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:08,942 INFO L87 Difference]: Start difference. First operand 487 states and 1537 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:09,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:09,454 INFO L93 Difference]: Finished difference Result 988 states and 3034 transitions. [2021-06-12 20:02:09,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:02:09,454 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:09,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:09,456 INFO L225 Difference]: With dead ends: 988 [2021-06-12 20:02:09,456 INFO L226 Difference]: Without dead ends: 961 [2021-06-12 20:02:09,456 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 426.5ms TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:02:09,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2021-06-12 20:02:09,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 488. [2021-06-12 20:02:09,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.166324435318275) internal successors, (1542), 487 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:09,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1542 transitions. [2021-06-12 20:02:09,463 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1542 transitions. Word has length 21 [2021-06-12 20:02:09,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:09,463 INFO L482 AbstractCegarLoop]: Abstraction has 488 states and 1542 transitions. [2021-06-12 20:02:09,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:09,463 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1542 transitions. [2021-06-12 20:02:09,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:09,463 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:09,463 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:09,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2598 [2021-06-12 20:02:09,664 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:09,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:09,664 INFO L82 PathProgramCache]: Analyzing trace with hash 934970323, now seen corresponding path program 520 times [2021-06-12 20:02:09,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:09,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733562807] [2021-06-12 20:02:09,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:09,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:09,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:09,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733562807] [2021-06-12 20:02:09,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733562807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:09,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247695833] [2021-06-12 20:02:09,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:09,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:09,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:09,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:09,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:09,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:09,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:09,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:09,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:09,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:09,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:09,830 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:02:09,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:09,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:09,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:09,861 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:09,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:09,863 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:09,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:09,869 INFO L518 ElimStorePlain]: Eliminatee v_prenex_113 vanished before elimination [2021-06-12 20:02:09,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:09,870 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:13 [2021-06-12 20:02:09,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:09,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247695833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:09,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:09,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:02:09,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512406431] [2021-06-12 20:02:09,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:02:09,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:09,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:02:09,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:02:09,919 INFO L87 Difference]: Start difference. First operand 488 states and 1542 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:10,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:10,557 INFO L93 Difference]: Finished difference Result 1003 states and 3062 transitions. [2021-06-12 20:02:10,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:02:10,557 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:10,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:10,559 INFO L225 Difference]: With dead ends: 1003 [2021-06-12 20:02:10,559 INFO L226 Difference]: Without dead ends: 976 [2021-06-12 20:02:10,559 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 539.3ms TimeCoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:02:10,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-06-12 20:02:10,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 505. [2021-06-12 20:02:10,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.1765873015873014) internal successors, (1601), 504 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:10,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1601 transitions. [2021-06-12 20:02:10,566 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1601 transitions. Word has length 21 [2021-06-12 20:02:10,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:10,566 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1601 transitions. [2021-06-12 20:02:10,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:10,567 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1601 transitions. [2021-06-12 20:02:10,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:10,567 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:10,567 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:10,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2601 [2021-06-12 20:02:10,768 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:10,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:10,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1673605133, now seen corresponding path program 521 times [2021-06-12 20:02:10,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:10,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094073253] [2021-06-12 20:02:10,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:10,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:10,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:10,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094073253] [2021-06-12 20:02:10,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094073253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:10,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162745635] [2021-06-12 20:02:10,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:10,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:02:10,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:10,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:10,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:10,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:10,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:10,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:10,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:10,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:10,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:10,937 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:02:10,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:10,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:10,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:10,979 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:10,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:10,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:02:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:11,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162745635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:11,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:11,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:02:11,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312511403] [2021-06-12 20:02:11,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:02:11,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:11,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:02:11,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:02:11,010 INFO L87 Difference]: Start difference. First operand 505 states and 1601 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:11,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:11,429 INFO L93 Difference]: Finished difference Result 887 states and 2706 transitions. [2021-06-12 20:02:11,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:02:11,429 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:11,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:11,431 INFO L225 Difference]: With dead ends: 887 [2021-06-12 20:02:11,431 INFO L226 Difference]: Without dead ends: 866 [2021-06-12 20:02:11,431 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 371.4ms TimeCoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:02:11,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2021-06-12 20:02:11,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 484. [2021-06-12 20:02:11,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.1718426501035197) internal successors, (1532), 483 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:11,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1532 transitions. [2021-06-12 20:02:11,437 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1532 transitions. Word has length 21 [2021-06-12 20:02:11,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:11,437 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1532 transitions. [2021-06-12 20:02:11,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:11,437 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1532 transitions. [2021-06-12 20:02:11,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:11,438 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:11,438 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:11,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2609,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:11,638 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:11,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:11,639 INFO L82 PathProgramCache]: Analyzing trace with hash -429983025, now seen corresponding path program 522 times [2021-06-12 20:02:11,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:11,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717286108] [2021-06-12 20:02:11,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:11,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:11,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717286108] [2021-06-12 20:02:11,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717286108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:11,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604266871] [2021-06-12 20:02:11,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:11,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:02:11,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:11,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:11,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:11,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:11,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:11,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:11,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:11,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:11,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:11,805 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:02:11,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:11,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:11,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:11,849 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:11,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:11,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:02:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:11,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604266871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:11,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:11,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:02:11,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20763539] [2021-06-12 20:02:11,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:02:11,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:11,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:02:11,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:02:11,876 INFO L87 Difference]: Start difference. First operand 484 states and 1532 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:12,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:12,293 INFO L93 Difference]: Finished difference Result 910 states and 2789 transitions. [2021-06-12 20:02:12,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:02:12,294 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:12,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:12,295 INFO L225 Difference]: With dead ends: 910 [2021-06-12 20:02:12,295 INFO L226 Difference]: Without dead ends: 891 [2021-06-12 20:02:12,295 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 363.0ms TimeCoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:02:12,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-06-12 20:02:12,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 493. [2021-06-12 20:02:12,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.1747967479674797) internal successors, (1562), 492 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:12,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1562 transitions. [2021-06-12 20:02:12,302 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1562 transitions. Word has length 21 [2021-06-12 20:02:12,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:12,303 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1562 transitions. [2021-06-12 20:02:12,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:12,303 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1562 transitions. [2021-06-12 20:02:12,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:12,303 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:12,303 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:12,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 523 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2612 [2021-06-12 20:02:12,504 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:12,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:12,504 INFO L82 PathProgramCache]: Analyzing trace with hash -652191637, now seen corresponding path program 523 times [2021-06-12 20:02:12,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:12,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556594006] [2021-06-12 20:02:12,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:12,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:12,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556594006] [2021-06-12 20:02:12,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556594006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:12,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007862712] [2021-06-12 20:02:12,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:12,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:12,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:12,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:12,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:12,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:12,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:12,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 20:02:12,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:12,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:12,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:02:12,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:12,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:12,703 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:12,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:12,703 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:5 [2021-06-12 20:02:12,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:12,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007862712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:12,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:12,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:02:12,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529956583] [2021-06-12 20:02:12,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:02:12,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:12,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:02:12,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:02:12,735 INFO L87 Difference]: Start difference. First operand 493 states and 1562 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:13,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:13,166 INFO L93 Difference]: Finished difference Result 983 states and 2986 transitions. [2021-06-12 20:02:13,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:02:13,166 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:13,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:13,167 INFO L225 Difference]: With dead ends: 983 [2021-06-12 20:02:13,168 INFO L226 Difference]: Without dead ends: 923 [2021-06-12 20:02:13,168 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 387.0ms TimeCoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:02:13,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-06-12 20:02:13,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 501. [2021-06-12 20:02:13,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 3.172) internal successors, (1586), 500 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:13,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1586 transitions. [2021-06-12 20:02:13,174 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1586 transitions. Word has length 21 [2021-06-12 20:02:13,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:13,174 INFO L482 AbstractCegarLoop]: Abstraction has 501 states and 1586 transitions. [2021-06-12 20:02:13,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:13,174 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1586 transitions. [2021-06-12 20:02:13,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:13,175 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:13,175 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:13,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2615,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:13,375 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:13,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:13,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1256408815, now seen corresponding path program 524 times [2021-06-12 20:02:13,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:13,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341294713] [2021-06-12 20:02:13,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:13,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:13,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:13,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341294713] [2021-06-12 20:02:13,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341294713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:13,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669054909] [2021-06-12 20:02:13,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:13,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:13,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:13,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:13,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:13,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:13,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:13,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:13,551 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:13,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:13,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:13,558 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:02:13,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:13,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:13,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:13,606 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:13,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:13,609 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:13,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:13,631 INFO L518 ElimStorePlain]: Eliminatee v_prenex_115 vanished before elimination [2021-06-12 20:02:13,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:13,632 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:13 [2021-06-12 20:02:13,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:13,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669054909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:13,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:13,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:02:13,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511537650] [2021-06-12 20:02:13,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:02:13,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:13,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:02:13,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:02:13,678 INFO L87 Difference]: Start difference. First operand 501 states and 1586 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:14,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:14,270 INFO L93 Difference]: Finished difference Result 1022 states and 3138 transitions. [2021-06-12 20:02:14,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:02:14,270 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:14,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:14,272 INFO L225 Difference]: With dead ends: 1022 [2021-06-12 20:02:14,272 INFO L226 Difference]: Without dead ends: 999 [2021-06-12 20:02:14,272 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 514.5ms TimeCoverageRelationStatistics Valid=223, Invalid=899, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:02:14,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-06-12 20:02:14,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 498. [2021-06-12 20:02:14,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 3.17102615694165) internal successors, (1576), 497 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:14,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1576 transitions. [2021-06-12 20:02:14,279 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1576 transitions. Word has length 21 [2021-06-12 20:02:14,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:14,279 INFO L482 AbstractCegarLoop]: Abstraction has 498 states and 1576 transitions. [2021-06-12 20:02:14,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:14,279 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1576 transitions. [2021-06-12 20:02:14,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:14,279 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:14,279 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:14,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2618,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:14,480 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:14,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:14,480 INFO L82 PathProgramCache]: Analyzing trace with hash 370610535, now seen corresponding path program 525 times [2021-06-12 20:02:14,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:14,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784994289] [2021-06-12 20:02:14,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:14,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:14,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784994289] [2021-06-12 20:02:14,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784994289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:14,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142134683] [2021-06-12 20:02:14,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:14,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:02:14,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:14,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:02:14,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:14,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:14,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:14,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 20:02:14,676 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:14,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:14,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:14,688 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:49 [2021-06-12 20:02:14,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 20:02:14,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:14,759 INFO L628 ElimStorePlain]: treesize reduction 23, result has 72.9 percent of original size [2021-06-12 20:02:14,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-12 20:02:14,762 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:14,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:14,774 INFO L518 ElimStorePlain]: Eliminatee v_prenex_119 vanished before elimination [2021-06-12 20:02:14,774 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:14,774 INFO L518 ElimStorePlain]: Eliminatee v_prenex_120 vanished before elimination [2021-06-12 20:02:14,774 INFO L518 ElimStorePlain]: Eliminatee v_prenex_121 vanished before elimination [2021-06-12 20:02:14,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:14,777 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:14,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:14,788 INFO L518 ElimStorePlain]: Eliminatee v_prenex_117 vanished before elimination [2021-06-12 20:02:14,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:14,788 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 8 variables, input treesize:105, output treesize:26 [2021-06-12 20:02:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:14,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142134683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:14,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:14,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:02:14,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310760084] [2021-06-12 20:02:14,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:02:14,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:14,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:02:14,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:02:14,862 INFO L87 Difference]: Start difference. First operand 498 states and 1576 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:16,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:16,061 INFO L93 Difference]: Finished difference Result 1189 states and 3699 transitions. [2021-06-12 20:02:16,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:02:16,061 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:16,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:16,063 INFO L225 Difference]: With dead ends: 1189 [2021-06-12 20:02:16,063 INFO L226 Difference]: Without dead ends: 1135 [2021-06-12 20:02:16,063 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1083.8ms TimeCoverageRelationStatistics Valid=346, Invalid=1816, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:02:16,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2021-06-12 20:02:16,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 499. [2021-06-12 20:02:16,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 3.174698795180723) internal successors, (1581), 498 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:16,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1581 transitions. [2021-06-12 20:02:16,070 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1581 transitions. Word has length 21 [2021-06-12 20:02:16,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:16,070 INFO L482 AbstractCegarLoop]: Abstraction has 499 states and 1581 transitions. [2021-06-12 20:02:16,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:16,071 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1581 transitions. [2021-06-12 20:02:16,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:16,071 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:16,071 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:16,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2623 [2021-06-12 20:02:16,272 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:16,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:16,272 INFO L82 PathProgramCache]: Analyzing trace with hash 86347851, now seen corresponding path program 526 times [2021-06-12 20:02:16,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:16,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098507233] [2021-06-12 20:02:16,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:16,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:16,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098507233] [2021-06-12 20:02:16,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098507233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:16,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851037252] [2021-06-12 20:02:16,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:16,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:16,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:16,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:16,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:16,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:16,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:16,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:16,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:16,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:16,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:16,433 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:02:16,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:16,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:16,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:16,464 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:16,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:16,466 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:16,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:16,472 INFO L518 ElimStorePlain]: Eliminatee v_prenex_123 vanished before elimination [2021-06-12 20:02:16,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:16,472 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:13 [2021-06-12 20:02:16,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:16,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851037252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:16,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:16,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 20:02:16,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996304046] [2021-06-12 20:02:16,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:16,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:16,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:16,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:16,523 INFO L87 Difference]: Start difference. First operand 499 states and 1581 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:16,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:16,987 INFO L93 Difference]: Finished difference Result 1016 states and 3110 transitions. [2021-06-12 20:02:16,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:02:16,987 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:16,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:16,989 INFO L225 Difference]: With dead ends: 1016 [2021-06-12 20:02:16,989 INFO L226 Difference]: Without dead ends: 989 [2021-06-12 20:02:16,989 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 356.6ms TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:02:16,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-06-12 20:02:16,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 519. [2021-06-12 20:02:16,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 3.189189189189189) internal successors, (1652), 518 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:16,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1652 transitions. [2021-06-12 20:02:16,996 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1652 transitions. Word has length 21 [2021-06-12 20:02:16,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:16,996 INFO L482 AbstractCegarLoop]: Abstraction has 519 states and 1652 transitions. [2021-06-12 20:02:16,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:16,996 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1652 transitions. [2021-06-12 20:02:16,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:16,997 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:16,997 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:17,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 527 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2631 [2021-06-12 20:02:17,197 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:17,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:17,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1772739691, now seen corresponding path program 527 times [2021-06-12 20:02:17,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:17,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808045953] [2021-06-12 20:02:17,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:17,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:17,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:17,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808045953] [2021-06-12 20:02:17,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808045953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:17,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414215452] [2021-06-12 20:02:17,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:17,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:02:17,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:17,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:17,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:17,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:17,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:17,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:17,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:17,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:17,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:17,367 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:02:17,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:17,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:17,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:17,401 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:17,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:17,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:02:17,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:17,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414215452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:17,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:17,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:02:17,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790198169] [2021-06-12 20:02:17,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:02:17,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:17,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:02:17,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:02:17,432 INFO L87 Difference]: Start difference. First operand 519 states and 1652 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:17,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:17,847 INFO L93 Difference]: Finished difference Result 891 states and 2739 transitions. [2021-06-12 20:02:17,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:02:17,847 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:17,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:17,848 INFO L225 Difference]: With dead ends: 891 [2021-06-12 20:02:17,848 INFO L226 Difference]: Without dead ends: 864 [2021-06-12 20:02:17,849 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 336.4ms TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:02:17,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2021-06-12 20:02:17,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 500. [2021-06-12 20:02:17,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 3.1783567134268536) internal successors, (1586), 499 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:17,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1586 transitions. [2021-06-12 20:02:17,855 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1586 transitions. Word has length 21 [2021-06-12 20:02:17,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:17,855 INFO L482 AbstractCegarLoop]: Abstraction has 500 states and 1586 transitions. [2021-06-12 20:02:17,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:17,855 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1586 transitions. [2021-06-12 20:02:17,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:17,856 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:17,856 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:18,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2639 [2021-06-12 20:02:18,056 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:18,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:18,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1741818095, now seen corresponding path program 528 times [2021-06-12 20:02:18,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:18,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132428876] [2021-06-12 20:02:18,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:18,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:18,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132428876] [2021-06-12 20:02:18,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132428876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:18,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428922542] [2021-06-12 20:02:18,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:18,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:02:18,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:18,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:18,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:18,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:18,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:18,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:18,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:18,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:15 [2021-06-12 20:02:18,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:02:18,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:18,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:18,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:18,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:18,245 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:18,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:18,245 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:02:18,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:18,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428922542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:18,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:18,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:02:18,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134819048] [2021-06-12 20:02:18,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:02:18,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:18,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:02:18,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:02:18,294 INFO L87 Difference]: Start difference. First operand 500 states and 1586 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:18,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:18,829 INFO L93 Difference]: Finished difference Result 1071 states and 3271 transitions. [2021-06-12 20:02:18,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:02:18,830 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:18,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:18,831 INFO L225 Difference]: With dead ends: 1071 [2021-06-12 20:02:18,831 INFO L226 Difference]: Without dead ends: 1040 [2021-06-12 20:02:18,831 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 437.7ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:02:18,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2021-06-12 20:02:18,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 502. [2021-06-12 20:02:18,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.18562874251497) internal successors, (1596), 501 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:18,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1596 transitions. [2021-06-12 20:02:18,838 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1596 transitions. Word has length 21 [2021-06-12 20:02:18,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:18,838 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 1596 transitions. [2021-06-12 20:02:18,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:18,838 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1596 transitions. [2021-06-12 20:02:18,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:18,839 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:18,839 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:19,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2642,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:19,039 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:19,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:19,040 INFO L82 PathProgramCache]: Analyzing trace with hash -2026080779, now seen corresponding path program 529 times [2021-06-12 20:02:19,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:19,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090745702] [2021-06-12 20:02:19,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:19,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:19,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:19,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090745702] [2021-06-12 20:02:19,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090745702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:19,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198452808] [2021-06-12 20:02:19,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:19,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:19,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:19,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:19,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:19,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:19,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:19,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:19,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:19,175 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-12 20:02:19,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:19,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:19,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:19,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:19,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:19,213 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:19,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:19,213 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:13 [2021-06-12 20:02:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:19,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198452808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:19,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:19,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 20:02:19,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508115667] [2021-06-12 20:02:19,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:19,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:19,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:19,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:19,264 INFO L87 Difference]: Start difference. First operand 502 states and 1596 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:19,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:19,777 INFO L93 Difference]: Finished difference Result 1144 states and 3503 transitions. [2021-06-12 20:02:19,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:02:19,777 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:19,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:19,779 INFO L225 Difference]: With dead ends: 1144 [2021-06-12 20:02:19,779 INFO L226 Difference]: Without dead ends: 1117 [2021-06-12 20:02:19,779 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 395.3ms TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:02:19,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-06-12 20:02:19,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 530. [2021-06-12 20:02:19,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.2060491493383743) internal successors, (1696), 529 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:19,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1696 transitions. [2021-06-12 20:02:19,786 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1696 transitions. Word has length 21 [2021-06-12 20:02:19,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:19,786 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1696 transitions. [2021-06-12 20:02:19,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:19,787 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1696 transitions. [2021-06-12 20:02:19,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:19,787 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:19,787 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:19,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2645,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:19,988 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:19,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:19,988 INFO L82 PathProgramCache]: Analyzing trace with hash -339688939, now seen corresponding path program 530 times [2021-06-12 20:02:19,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:19,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867168427] [2021-06-12 20:02:19,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:20,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:20,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867168427] [2021-06-12 20:02:20,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867168427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:20,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713609925] [2021-06-12 20:02:20,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:20,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:20,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:20,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:20,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:20,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:20,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:20,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:20,133 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:20,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:20,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:20,136 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-12 20:02:20,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:20,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:20,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:20,180 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:20,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:20,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:02:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:20,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713609925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:20,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:20,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:02:20,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570576975] [2021-06-12 20:02:20,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:02:20,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:20,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:02:20,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:02:20,211 INFO L87 Difference]: Start difference. First operand 530 states and 1696 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:20,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:20,675 INFO L93 Difference]: Finished difference Result 1042 states and 3189 transitions. [2021-06-12 20:02:20,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:02:20,676 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:20,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:20,677 INFO L225 Difference]: With dead ends: 1042 [2021-06-12 20:02:20,677 INFO L226 Difference]: Without dead ends: 1021 [2021-06-12 20:02:20,677 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 358.6ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:02:20,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2021-06-12 20:02:20,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 524. [2021-06-12 20:02:20,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.2007648183556405) internal successors, (1674), 523 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:20,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1674 transitions. [2021-06-12 20:02:20,684 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1674 transitions. Word has length 21 [2021-06-12 20:02:20,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:20,684 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1674 transitions. [2021-06-12 20:02:20,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:20,684 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1674 transitions. [2021-06-12 20:02:20,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:20,685 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:20,685 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:20,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2652 [2021-06-12 20:02:20,885 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:20,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:20,886 INFO L82 PathProgramCache]: Analyzing trace with hash 700546859, now seen corresponding path program 531 times [2021-06-12 20:02:20,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:20,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583025868] [2021-06-12 20:02:20,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:20,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:20,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583025868] [2021-06-12 20:02:20,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583025868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:20,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547031945] [2021-06-12 20:02:20,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:20,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:02:20,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:20,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:20,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:21,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:21,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:21,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:21,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:21,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:21,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:21,031 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-12 20:02:21,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:21,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:21,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:21,071 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:21,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:21,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:02:21,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:21,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547031945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:21,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:21,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:02:21,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082041626] [2021-06-12 20:02:21,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:02:21,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:21,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:02:21,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:02:21,102 INFO L87 Difference]: Start difference. First operand 524 states and 1674 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:21,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:21,611 INFO L93 Difference]: Finished difference Result 1084 states and 3297 transitions. [2021-06-12 20:02:21,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:02:21,612 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:21,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:21,613 INFO L225 Difference]: With dead ends: 1084 [2021-06-12 20:02:21,613 INFO L226 Difference]: Without dead ends: 1063 [2021-06-12 20:02:21,614 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 380.6ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:02:21,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2021-06-12 20:02:21,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 504. [2021-06-12 20:02:21,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 3.1868787276341948) internal successors, (1603), 503 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:21,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1603 transitions. [2021-06-12 20:02:21,621 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1603 transitions. Word has length 21 [2021-06-12 20:02:21,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:21,621 INFO L482 AbstractCegarLoop]: Abstraction has 504 states and 1603 transitions. [2021-06-12 20:02:21,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:21,621 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1603 transitions. [2021-06-12 20:02:21,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:21,621 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:21,622 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:21,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 532 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2655 [2021-06-12 20:02:21,822 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:21,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:21,822 INFO L82 PathProgramCache]: Analyzing trace with hash 2024385945, now seen corresponding path program 532 times [2021-06-12 20:02:21,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:21,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063087093] [2021-06-12 20:02:21,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:21,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:21,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063087093] [2021-06-12 20:02:21,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063087093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:21,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304094009] [2021-06-12 20:02:21,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:21,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:21,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:21,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:21,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:21,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:21,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:21,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:21,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:21,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 20:02:21,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:21,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:21,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:21,979 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:21,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:21,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:02:21,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:21,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304094009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:21,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:21,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:02:21,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28158114] [2021-06-12 20:02:21,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:02:21,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:21,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:02:21,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:02:21,988 INFO L87 Difference]: Start difference. First operand 504 states and 1603 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:22,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:22,162 INFO L93 Difference]: Finished difference Result 779 states and 2413 transitions. [2021-06-12 20:02:22,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:22,163 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:22,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:22,164 INFO L225 Difference]: With dead ends: 779 [2021-06-12 20:02:22,164 INFO L226 Difference]: Without dead ends: 757 [2021-06-12 20:02:22,164 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:02:22,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-06-12 20:02:22,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 507. [2021-06-12 20:02:22,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.185770750988142) internal successors, (1612), 506 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:22,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1612 transitions. [2021-06-12 20:02:22,178 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1612 transitions. Word has length 21 [2021-06-12 20:02:22,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:22,178 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1612 transitions. [2021-06-12 20:02:22,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:22,179 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1612 transitions. [2021-06-12 20:02:22,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:22,179 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:22,179 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:22,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2658 [2021-06-12 20:02:22,404 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:22,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:22,404 INFO L82 PathProgramCache]: Analyzing trace with hash 81685753, now seen corresponding path program 533 times [2021-06-12 20:02:22,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:22,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066301506] [2021-06-12 20:02:22,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:22,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:22,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:22,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:22,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066301506] [2021-06-12 20:02:22,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066301506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:22,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122006847] [2021-06-12 20:02:22,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:22,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:22,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:22,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:22,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:22,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:22,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:22,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:22,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:22,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 20:02:22,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:22,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:22,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:22,541 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:22,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:22,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:02:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:22,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122006847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:22,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:22,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:02:22,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158294146] [2021-06-12 20:02:22,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:02:22,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:22,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:02:22,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:02:22,550 INFO L87 Difference]: Start difference. First operand 507 states and 1612 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:22,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:22,693 INFO L93 Difference]: Finished difference Result 686 states and 2140 transitions. [2021-06-12 20:02:22,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:22,694 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:22,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:22,695 INFO L225 Difference]: With dead ends: 686 [2021-06-12 20:02:22,695 INFO L226 Difference]: Without dead ends: 664 [2021-06-12 20:02:22,695 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:02:22,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-06-12 20:02:22,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 513. [2021-06-12 20:02:22,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 3.189453125) internal successors, (1633), 512 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:22,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1633 transitions. [2021-06-12 20:02:22,700 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1633 transitions. Word has length 21 [2021-06-12 20:02:22,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:22,700 INFO L482 AbstractCegarLoop]: Abstraction has 513 states and 1633 transitions. [2021-06-12 20:02:22,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:22,701 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1633 transitions. [2021-06-12 20:02:22,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:22,701 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:22,701 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:22,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2660,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:22,902 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:22,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:22,902 INFO L82 PathProgramCache]: Analyzing trace with hash -420105583, now seen corresponding path program 534 times [2021-06-12 20:02:22,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:22,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503416054] [2021-06-12 20:02:22,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:22,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:22,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503416054] [2021-06-12 20:02:22,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503416054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:22,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982214293] [2021-06-12 20:02:22,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:22,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:02:22,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:22,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:22,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:23,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:23,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:23,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 20:02:23,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:23,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:23,043 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:23,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,044 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:02:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:23,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982214293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:23,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:23,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:02:23,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940035150] [2021-06-12 20:02:23,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:02:23,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:23,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:02:23,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:02:23,059 INFO L87 Difference]: Start difference. First operand 513 states and 1633 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:23,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:23,168 INFO L93 Difference]: Finished difference Result 677 states and 2116 transitions. [2021-06-12 20:02:23,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:23,168 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:23,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:23,169 INFO L225 Difference]: With dead ends: 677 [2021-06-12 20:02:23,169 INFO L226 Difference]: Without dead ends: 655 [2021-06-12 20:02:23,169 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:02:23,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-06-12 20:02:23,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 510. [2021-06-12 20:02:23,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 3.1846758349705304) internal successors, (1621), 509 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:23,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1621 transitions. [2021-06-12 20:02:23,174 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1621 transitions. Word has length 21 [2021-06-12 20:02:23,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:23,175 INFO L482 AbstractCegarLoop]: Abstraction has 510 states and 1621 transitions. [2021-06-12 20:02:23,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:23,175 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1621 transitions. [2021-06-12 20:02:23,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:23,175 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:23,175 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:23,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2662 [2021-06-12 20:02:23,376 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:23,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:23,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1768077593, now seen corresponding path program 535 times [2021-06-12 20:02:23,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:23,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574553524] [2021-06-12 20:02:23,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:23,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:23,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:23,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574553524] [2021-06-12 20:02:23,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574553524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:23,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704024490] [2021-06-12 20:02:23,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:23,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:23,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:23,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:23,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:23,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 20:02:23,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:23,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:23,519 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:23,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:02:23,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:23,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704024490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:23,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:23,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:02:23,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137010935] [2021-06-12 20:02:23,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:02:23,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:23,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:02:23,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:02:23,533 INFO L87 Difference]: Start difference. First operand 510 states and 1621 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:23,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:23,677 INFO L93 Difference]: Finished difference Result 680 states and 2122 transitions. [2021-06-12 20:02:23,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:23,677 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:23,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:23,678 INFO L225 Difference]: With dead ends: 680 [2021-06-12 20:02:23,678 INFO L226 Difference]: Without dead ends: 658 [2021-06-12 20:02:23,678 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:02:23,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-06-12 20:02:23,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 504. [2021-06-12 20:02:23,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 3.1868787276341948) internal successors, (1603), 503 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:23,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1603 transitions. [2021-06-12 20:02:23,684 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1603 transitions. Word has length 21 [2021-06-12 20:02:23,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:23,684 INFO L482 AbstractCegarLoop]: Abstraction has 504 states and 1603 transitions. [2021-06-12 20:02:23,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:23,684 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1603 transitions. [2021-06-12 20:02:23,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:23,684 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:23,684 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:23,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2664 [2021-06-12 20:02:23,885 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:23,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:23,885 INFO L82 PathProgramCache]: Analyzing trace with hash 643694887, now seen corresponding path program 536 times [2021-06-12 20:02:23,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:23,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316608511] [2021-06-12 20:02:23,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:23,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:23,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:23,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316608511] [2021-06-12 20:02:23,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316608511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:23,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823579169] [2021-06-12 20:02:23,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:23,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:23,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:23,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:23,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:23,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:23,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:23,997 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:24,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:24,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:24,004 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:02:24,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:24,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:24,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:24,039 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:24,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:24,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:02:24,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:24,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823579169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:24,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:24,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:02:24,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708710170] [2021-06-12 20:02:24,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:02:24,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:24,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:02:24,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:02:24,048 INFO L87 Difference]: Start difference. First operand 504 states and 1603 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:24,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:24,204 INFO L93 Difference]: Finished difference Result 870 states and 2692 transitions. [2021-06-12 20:02:24,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:24,204 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:24,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:24,205 INFO L225 Difference]: With dead ends: 870 [2021-06-12 20:02:24,205 INFO L226 Difference]: Without dead ends: 848 [2021-06-12 20:02:24,205 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 124.8ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:24,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2021-06-12 20:02:24,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 507. [2021-06-12 20:02:24,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.183794466403162) internal successors, (1611), 506 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:24,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1611 transitions. [2021-06-12 20:02:24,212 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1611 transitions. Word has length 21 [2021-06-12 20:02:24,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:24,212 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1611 transitions. [2021-06-12 20:02:24,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:24,212 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1611 transitions. [2021-06-12 20:02:24,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:24,212 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:24,212 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:24,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2666,537 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:24,413 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:24,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:24,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1038441427, now seen corresponding path program 537 times [2021-06-12 20:02:24,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:24,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540078797] [2021-06-12 20:02:24,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:24,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:24,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:24,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540078797] [2021-06-12 20:02:24,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540078797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:24,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106636439] [2021-06-12 20:02:24,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:24,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:02:24,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:24,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:24,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:24,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:24,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:24,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:24,527 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:24,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:24,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:24,534 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:02:24,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:24,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:24,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:24,572 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:24,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:24,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:02:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:24,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106636439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:24,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:24,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:02:24,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971422400] [2021-06-12 20:02:24,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:02:24,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:24,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:02:24,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:02:24,582 INFO L87 Difference]: Start difference. First operand 507 states and 1611 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:24,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:24,754 INFO L93 Difference]: Finished difference Result 789 states and 2455 transitions. [2021-06-12 20:02:24,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:24,754 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:24,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:24,755 INFO L225 Difference]: With dead ends: 789 [2021-06-12 20:02:24,755 INFO L226 Difference]: Without dead ends: 767 [2021-06-12 20:02:24,755 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:02:24,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-06-12 20:02:24,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 511. [2021-06-12 20:02:24,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 3.184313725490196) internal successors, (1624), 510 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:24,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1624 transitions. [2021-06-12 20:02:24,763 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1624 transitions. Word has length 21 [2021-06-12 20:02:24,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:24,763 INFO L482 AbstractCegarLoop]: Abstraction has 511 states and 1624 transitions. [2021-06-12 20:02:24,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:24,763 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1624 transitions. [2021-06-12 20:02:24,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:24,763 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:24,763 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:24,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2669 [2021-06-12 20:02:24,964 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:24,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:24,964 INFO L82 PathProgramCache]: Analyzing trace with hash 842311511, now seen corresponding path program 538 times [2021-06-12 20:02:24,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:24,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364161064] [2021-06-12 20:02:24,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:24,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:25,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:25,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364161064] [2021-06-12 20:02:25,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364161064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:25,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020911856] [2021-06-12 20:02:25,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:25,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:25,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:25,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:25,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:25,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:25,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:25,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:25,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:25,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:25,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:25,081 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:02:25,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:25,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:25,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:25,112 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:25,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:25,118 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:25,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:25,119 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-12 20:02:25,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:25,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020911856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:25,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:25,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:02:25,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47246379] [2021-06-12 20:02:25,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:02:25,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:25,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:02:25,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:02:25,144 INFO L87 Difference]: Start difference. First operand 511 states and 1624 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:25,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:25,355 INFO L93 Difference]: Finished difference Result 798 states and 2481 transitions. [2021-06-12 20:02:25,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:25,355 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:25,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:25,357 INFO L225 Difference]: With dead ends: 798 [2021-06-12 20:02:25,357 INFO L226 Difference]: Without dead ends: 769 [2021-06-12 20:02:25,357 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 134.7ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:25,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-06-12 20:02:25,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 503. [2021-06-12 20:02:25,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 3.183266932270916) internal successors, (1598), 502 states have internal predecessors, (1598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:25,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1598 transitions. [2021-06-12 20:02:25,362 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1598 transitions. Word has length 21 [2021-06-12 20:02:25,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:25,363 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1598 transitions. [2021-06-12 20:02:25,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:25,363 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1598 transitions. [2021-06-12 20:02:25,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:25,363 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:25,363 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:25,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 539 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2673 [2021-06-12 20:02:25,564 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:25,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:25,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1458565331, now seen corresponding path program 539 times [2021-06-12 20:02:25,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:25,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213706594] [2021-06-12 20:02:25,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:25,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:25,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:25,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213706594] [2021-06-12 20:02:25,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213706594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:25,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913763769] [2021-06-12 20:02:25,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:25,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:25,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:25,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:25,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:25,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:25,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:25,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:25,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:25,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:02:25,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:25,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:25,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:25,757 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:25,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:25,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:02:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:25,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913763769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:25,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:25,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:02:25,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45803743] [2021-06-12 20:02:25,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:02:25,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:25,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:02:25,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:25,766 INFO L87 Difference]: Start difference. First operand 503 states and 1598 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:25,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:25,916 INFO L93 Difference]: Finished difference Result 658 states and 2055 transitions. [2021-06-12 20:02:25,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:25,916 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:25,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:25,917 INFO L225 Difference]: With dead ends: 658 [2021-06-12 20:02:25,917 INFO L226 Difference]: Without dead ends: 636 [2021-06-12 20:02:25,917 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 132.2ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:25,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-06-12 20:02:25,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 510. [2021-06-12 20:02:25,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 3.1886051080550097) internal successors, (1623), 509 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:25,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1623 transitions. [2021-06-12 20:02:25,923 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1623 transitions. Word has length 21 [2021-06-12 20:02:25,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:25,923 INFO L482 AbstractCegarLoop]: Abstraction has 510 states and 1623 transitions. [2021-06-12 20:02:25,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:25,923 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1623 transitions. [2021-06-12 20:02:25,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:25,923 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:25,924 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:26,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2678,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:26,124 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:26,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:26,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1960356667, now seen corresponding path program 540 times [2021-06-12 20:02:26,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:26,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966016039] [2021-06-12 20:02:26,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:26,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:26,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966016039] [2021-06-12 20:02:26,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966016039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:26,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913417955] [2021-06-12 20:02:26,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:26,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:02:26,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:26,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:26,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:26,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:26,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:26,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:26,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:26,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:02:26,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:26,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:26,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:26,325 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:26,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:26,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:02:26,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:26,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913417955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:26,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:26,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:02:26,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697878146] [2021-06-12 20:02:26,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:02:26,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:26,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:02:26,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:26,339 INFO L87 Difference]: Start difference. First operand 510 states and 1623 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:26,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:26,492 INFO L93 Difference]: Finished difference Result 649 states and 2031 transitions. [2021-06-12 20:02:26,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:26,492 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:26,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:26,493 INFO L225 Difference]: With dead ends: 649 [2021-06-12 20:02:26,493 INFO L226 Difference]: Without dead ends: 627 [2021-06-12 20:02:26,494 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 135.3ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:26,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-06-12 20:02:26,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 507. [2021-06-12 20:02:26,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.183794466403162) internal successors, (1611), 506 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:26,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1611 transitions. [2021-06-12 20:02:26,499 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1611 transitions. Word has length 21 [2021-06-12 20:02:26,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:26,499 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1611 transitions. [2021-06-12 20:02:26,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:26,499 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1611 transitions. [2021-06-12 20:02:26,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:26,500 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:26,500 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:26,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2681,541 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:26,700 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:26,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:26,700 INFO L82 PathProgramCache]: Analyzing trace with hash 227826509, now seen corresponding path program 541 times [2021-06-12 20:02:26,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:26,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551430331] [2021-06-12 20:02:26,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:26,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:26,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:26,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:26,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551430331] [2021-06-12 20:02:26,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551430331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:26,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192120553] [2021-06-12 20:02:26,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:26,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:26,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:26,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:26,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:26,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:26,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:26,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:02:26,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:26,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:26,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:26,891 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:26,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:26,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:02:26,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:26,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192120553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:26,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:26,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:02:26,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383102971] [2021-06-12 20:02:26,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:02:26,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:26,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:02:26,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:26,905 INFO L87 Difference]: Start difference. First operand 507 states and 1611 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:27,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:27,066 INFO L93 Difference]: Finished difference Result 652 states and 2037 transitions. [2021-06-12 20:02:27,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:27,066 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:27,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:27,067 INFO L225 Difference]: With dead ends: 652 [2021-06-12 20:02:27,067 INFO L226 Difference]: Without dead ends: 630 [2021-06-12 20:02:27,067 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 134.9ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:27,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-06-12 20:02:27,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 504. [2021-06-12 20:02:27,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 3.1848906560636183) internal successors, (1602), 503 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:27,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1602 transitions. [2021-06-12 20:02:27,073 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1602 transitions. Word has length 21 [2021-06-12 20:02:27,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:27,073 INFO L482 AbstractCegarLoop]: Abstraction has 504 states and 1602 transitions. [2021-06-12 20:02:27,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:27,073 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1602 transitions. [2021-06-12 20:02:27,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:27,073 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:27,073 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:27,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 542 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2684 [2021-06-12 20:02:27,281 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:27,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:27,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1960579551, now seen corresponding path program 542 times [2021-06-12 20:02:27,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:27,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223906170] [2021-06-12 20:02:27,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:27,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:27,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223906170] [2021-06-12 20:02:27,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223906170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:27,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178084625] [2021-06-12 20:02:27,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:27,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:27,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:27,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:27,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:27,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:27,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:27,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:27,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:27,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:27,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:27,441 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:02:27,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:27,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:27,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:27,504 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:27,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:27,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:02:27,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:27,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178084625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:27,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:27,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:02:27,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795790343] [2021-06-12 20:02:27,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:02:27,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:27,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:02:27,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:27,513 INFO L87 Difference]: Start difference. First operand 504 states and 1602 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:27,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:27,731 INFO L93 Difference]: Finished difference Result 670 states and 2091 transitions. [2021-06-12 20:02:27,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:27,731 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:27,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:27,732 INFO L225 Difference]: With dead ends: 670 [2021-06-12 20:02:27,732 INFO L226 Difference]: Without dead ends: 648 [2021-06-12 20:02:27,732 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 156.5ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:27,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-06-12 20:02:27,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 511. [2021-06-12 20:02:27,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 3.1901960784313728) internal successors, (1627), 510 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:27,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1627 transitions. [2021-06-12 20:02:27,738 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1627 transitions. Word has length 21 [2021-06-12 20:02:27,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:27,738 INFO L482 AbstractCegarLoop]: Abstraction has 511 states and 1627 transitions. [2021-06-12 20:02:27,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:27,738 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1627 transitions. [2021-06-12 20:02:27,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:27,739 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:27,739 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:27,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2687 [2021-06-12 20:02:27,939 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:27,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:27,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1458788215, now seen corresponding path program 543 times [2021-06-12 20:02:27,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:27,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243896020] [2021-06-12 20:02:27,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:27,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:28,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:28,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243896020] [2021-06-12 20:02:28,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243896020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:28,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035074771] [2021-06-12 20:02:28,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:28,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:02:28,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:28,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:28,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:28,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:28,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:28,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:28,088 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:28,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:28,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:28,097 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:02:28,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:28,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:28,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:28,138 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:28,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:28,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:02:28,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:28,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035074771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:28,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:28,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:02:28,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118295215] [2021-06-12 20:02:28,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:02:28,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:28,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:02:28,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:02:28,152 INFO L87 Difference]: Start difference. First operand 511 states and 1627 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:28,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:28,316 INFO L93 Difference]: Finished difference Result 661 states and 2067 transitions. [2021-06-12 20:02:28,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:28,316 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:28,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:28,317 INFO L225 Difference]: With dead ends: 661 [2021-06-12 20:02:28,317 INFO L226 Difference]: Without dead ends: 639 [2021-06-12 20:02:28,317 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 149.5ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:28,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-06-12 20:02:28,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 508. [2021-06-12 20:02:28,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 3.185404339250493) internal successors, (1615), 507 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:28,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1615 transitions. [2021-06-12 20:02:28,323 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1615 transitions. Word has length 21 [2021-06-12 20:02:28,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:28,323 INFO L482 AbstractCegarLoop]: Abstraction has 508 states and 1615 transitions. [2021-06-12 20:02:28,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:28,323 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1615 transitions. [2021-06-12 20:02:28,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:28,324 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:28,324 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:28,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2691,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:28,524 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:28,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:28,524 INFO L82 PathProgramCache]: Analyzing trace with hash 545205239, now seen corresponding path program 544 times [2021-06-12 20:02:28,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:28,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267139136] [2021-06-12 20:02:28,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:28,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:28,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:28,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267139136] [2021-06-12 20:02:28,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267139136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:28,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216090579] [2021-06-12 20:02:28,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:28,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:28,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:28,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:28,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:28,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:28,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:28,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:28,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:28,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:28,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:28,689 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:02:28,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:28,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:28,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:28,746 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:28,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:28,749 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:28,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:28,755 INFO L518 ElimStorePlain]: Eliminatee v_prenex_125 vanished before elimination [2021-06-12 20:02:28,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:28,755 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:15 [2021-06-12 20:02:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:28,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216090579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:28,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:28,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:02:28,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9876599] [2021-06-12 20:02:28,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:02:28,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:28,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:02:28,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:28,781 INFO L87 Difference]: Start difference. First operand 508 states and 1615 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:28,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:28,964 INFO L93 Difference]: Finished difference Result 679 states and 2117 transitions. [2021-06-12 20:02:28,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:28,964 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:28,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:28,965 INFO L225 Difference]: With dead ends: 679 [2021-06-12 20:02:28,965 INFO L226 Difference]: Without dead ends: 650 [2021-06-12 20:02:28,966 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 167.6ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:28,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-06-12 20:02:28,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 505. [2021-06-12 20:02:28,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.1884920634920637) internal successors, (1607), 504 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:28,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1607 transitions. [2021-06-12 20:02:28,971 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1607 transitions. Word has length 21 [2021-06-12 20:02:28,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:28,971 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1607 transitions. [2021-06-12 20:02:28,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:28,971 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1607 transitions. [2021-06-12 20:02:28,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:28,972 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:28,972 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:29,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2695 [2021-06-12 20:02:29,173 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:29,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:29,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1173779443, now seen corresponding path program 545 times [2021-06-12 20:02:29,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:29,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801485127] [2021-06-12 20:02:29,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:29,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:29,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:29,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:29,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801485127] [2021-06-12 20:02:29,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801485127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:29,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468554084] [2021-06-12 20:02:29,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:29,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:29,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:29,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:29,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:29,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:29,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:29,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:29,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:29,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:29,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:29,335 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:02:29,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:29,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:29,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:29,374 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:29,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:29,376 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:29,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:29,385 INFO L518 ElimStorePlain]: Eliminatee v_prenex_127 vanished before elimination [2021-06-12 20:02:29,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:29,385 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:21 [2021-06-12 20:02:29,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:29,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468554084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:29,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:29,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:02:29,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991583377] [2021-06-12 20:02:29,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:02:29,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:29,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:02:29,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:02:29,423 INFO L87 Difference]: Start difference. First operand 505 states and 1607 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:29,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:29,627 INFO L93 Difference]: Finished difference Result 682 states and 2125 transitions. [2021-06-12 20:02:29,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:29,628 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:29,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:29,629 INFO L225 Difference]: With dead ends: 682 [2021-06-12 20:02:29,629 INFO L226 Difference]: Without dead ends: 653 [2021-06-12 20:02:29,629 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 166.6ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:29,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-06-12 20:02:29,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 504. [2021-06-12 20:02:29,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 3.1848906560636183) internal successors, (1602), 503 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:29,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1602 transitions. [2021-06-12 20:02:29,634 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1602 transitions. Word has length 21 [2021-06-12 20:02:29,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:29,634 INFO L482 AbstractCegarLoop]: Abstraction has 504 states and 1602 transitions. [2021-06-12 20:02:29,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:29,634 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1602 transitions. [2021-06-12 20:02:29,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:29,635 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:29,635 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:29,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2704,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:29,835 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:29,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:29,836 INFO L82 PathProgramCache]: Analyzing trace with hash 222607735, now seen corresponding path program 546 times [2021-06-12 20:02:29,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:29,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986310887] [2021-06-12 20:02:29,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:29,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:29,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:29,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986310887] [2021-06-12 20:02:29,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986310887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:29,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140706594] [2021-06-12 20:02:29,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:29,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:02:29,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:29,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:29,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:30,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:30,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:30,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:30,004 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:30,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:30,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:30,014 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:02:30,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:30,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:30,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:30,061 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:30,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:30,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:02:30,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:30,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140706594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:30,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:30,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:02:30,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318862586] [2021-06-12 20:02:30,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:02:30,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:30,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:02:30,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:30,075 INFO L87 Difference]: Start difference. First operand 504 states and 1602 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:30,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:30,274 INFO L93 Difference]: Finished difference Result 660 states and 2061 transitions. [2021-06-12 20:02:30,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:30,274 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:30,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:30,275 INFO L225 Difference]: With dead ends: 660 [2021-06-12 20:02:30,275 INFO L226 Difference]: Without dead ends: 638 [2021-06-12 20:02:30,275 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 181.2ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:30,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-06-12 20:02:30,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 507. [2021-06-12 20:02:30,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.185770750988142) internal successors, (1612), 506 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:30,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1612 transitions. [2021-06-12 20:02:30,280 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1612 transitions. Word has length 21 [2021-06-12 20:02:30,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:30,280 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1612 transitions. [2021-06-12 20:02:30,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:30,281 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1612 transitions. [2021-06-12 20:02:30,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:30,281 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:30,281 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:30,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2710,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:30,482 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:30,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:30,482 INFO L82 PathProgramCache]: Analyzing trace with hash -2022401915, now seen corresponding path program 547 times [2021-06-12 20:02:30,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:30,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680764159] [2021-06-12 20:02:30,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:30,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:30,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:30,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:30,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680764159] [2021-06-12 20:02:30,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680764159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:30,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604587112] [2021-06-12 20:02:30,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:30,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:30,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:30,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:30,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:30,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:30,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:30,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:30,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:30,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:30,650 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:02:30,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:30,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:30,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:30,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:30,690 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:30,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:30,698 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:30,698 INFO L518 ElimStorePlain]: Eliminatee v_prenex_128 vanished before elimination [2021-06-12 20:02:30,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:30,699 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:21 [2021-06-12 20:02:30,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:30,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604587112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:30,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:30,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:02:30,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342340358] [2021-06-12 20:02:30,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:02:30,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:30,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:02:30,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:30,736 INFO L87 Difference]: Start difference. First operand 507 states and 1612 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:30,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:30,921 INFO L93 Difference]: Finished difference Result 675 states and 2105 transitions. [2021-06-12 20:02:30,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:30,921 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:30,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:30,922 INFO L225 Difference]: With dead ends: 675 [2021-06-12 20:02:30,922 INFO L226 Difference]: Without dead ends: 646 [2021-06-12 20:02:30,922 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 186.1ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:30,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-06-12 20:02:30,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 502. [2021-06-12 20:02:30,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.1816367265469063) internal successors, (1594), 501 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:30,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1594 transitions. [2021-06-12 20:02:30,928 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1594 transitions. Word has length 21 [2021-06-12 20:02:30,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:30,928 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 1594 transitions. [2021-06-12 20:02:30,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:30,928 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1594 transitions. [2021-06-12 20:02:30,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:30,928 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:30,929 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:31,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2714 [2021-06-12 20:02:31,129 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:31,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:31,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1818185465, now seen corresponding path program 548 times [2021-06-12 20:02:31,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:31,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867699654] [2021-06-12 20:02:31,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:31,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:31,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867699654] [2021-06-12 20:02:31,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867699654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:31,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512140904] [2021-06-12 20:02:31,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:31,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:31,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:31,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:31,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:31,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:31,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:31,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,259 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:02:31,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:31,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:31,289 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:31,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:02:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:31,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512140904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:31,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:31,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:02:31,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565277370] [2021-06-12 20:02:31,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:02:31,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:31,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:02:31,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:02:31,298 INFO L87 Difference]: Start difference. First operand 502 states and 1594 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:31,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:31,442 INFO L93 Difference]: Finished difference Result 699 states and 2179 transitions. [2021-06-12 20:02:31,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:31,442 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:31,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:31,443 INFO L225 Difference]: With dead ends: 699 [2021-06-12 20:02:31,443 INFO L226 Difference]: Without dead ends: 677 [2021-06-12 20:02:31,443 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:02:31,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-06-12 20:02:31,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 511. [2021-06-12 20:02:31,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 3.184313725490196) internal successors, (1624), 510 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:31,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1624 transitions. [2021-06-12 20:02:31,449 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1624 transitions. Word has length 21 [2021-06-12 20:02:31,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:31,449 INFO L482 AbstractCegarLoop]: Abstraction has 511 states and 1624 transitions. [2021-06-12 20:02:31,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:31,449 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1624 transitions. [2021-06-12 20:02:31,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:31,450 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:31,450 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:31,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2720,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:31,650 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:31,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:31,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1316394129, now seen corresponding path program 549 times [2021-06-12 20:02:31,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:31,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459088972] [2021-06-12 20:02:31,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:31,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:31,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:31,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:31,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459088972] [2021-06-12 20:02:31,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459088972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:31,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179462551] [2021-06-12 20:02:31,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:31,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:02:31,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:31,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:31,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:31,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:31,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:31,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:02:31,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:31,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:31,800 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:31,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:02:31,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:31,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179462551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:31,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:31,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:02:31,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170764428] [2021-06-12 20:02:31,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:02:31,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:31,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:02:31,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:02:31,814 INFO L87 Difference]: Start difference. First operand 511 states and 1624 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:31,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:31,971 INFO L93 Difference]: Finished difference Result 690 states and 2155 transitions. [2021-06-12 20:02:31,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:31,972 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:31,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:31,973 INFO L225 Difference]: With dead ends: 690 [2021-06-12 20:02:31,973 INFO L226 Difference]: Without dead ends: 668 [2021-06-12 20:02:31,973 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:31,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-06-12 20:02:31,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 508. [2021-06-12 20:02:31,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 3.1794871794871793) internal successors, (1612), 507 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:31,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1612 transitions. [2021-06-12 20:02:31,994 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1612 transitions. Word has length 21 [2021-06-12 20:02:31,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:31,994 INFO L482 AbstractCegarLoop]: Abstraction has 508 states and 1612 transitions. [2021-06-12 20:02:31,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:31,994 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1612 transitions. [2021-06-12 20:02:31,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:31,995 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:31,995 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:32,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2722 [2021-06-12 20:02:32,195 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:32,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:32,195 INFO L82 PathProgramCache]: Analyzing trace with hash -790389991, now seen corresponding path program 550 times [2021-06-12 20:02:32,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:32,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452548748] [2021-06-12 20:02:32,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:32,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:32,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:32,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452548748] [2021-06-12 20:02:32,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452548748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:32,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907814559] [2021-06-12 20:02:32,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:32,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:32,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:32,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:32,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:32,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:32,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:32,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:32,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:32,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 20:02:32,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:32,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:32,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:32,342 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:32,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:32,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:02:32,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:32,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907814559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:32,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:32,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:02:32,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357340798] [2021-06-12 20:02:32,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:02:32,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:32,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:02:32,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:02:32,357 INFO L87 Difference]: Start difference. First operand 508 states and 1612 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:32,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:32,494 INFO L93 Difference]: Finished difference Result 693 states and 2161 transitions. [2021-06-12 20:02:32,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:32,494 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:32,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:32,495 INFO L225 Difference]: With dead ends: 693 [2021-06-12 20:02:32,495 INFO L226 Difference]: Without dead ends: 671 [2021-06-12 20:02:32,495 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:02:32,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-06-12 20:02:32,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 505. [2021-06-12 20:02:32,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.1805555555555554) internal successors, (1603), 504 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:32,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1603 transitions. [2021-06-12 20:02:32,501 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1603 transitions. Word has length 21 [2021-06-12 20:02:32,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:32,501 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1603 transitions. [2021-06-12 20:02:32,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:32,501 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1603 transitions. [2021-06-12 20:02:32,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:32,502 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:32,502 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:32,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2724,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:32,702 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:32,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:32,702 INFO L82 PathProgramCache]: Analyzing trace with hash 249845807, now seen corresponding path program 551 times [2021-06-12 20:02:32,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:32,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963297699] [2021-06-12 20:02:32,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:32,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:32,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:32,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963297699] [2021-06-12 20:02:32,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963297699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:32,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227457506] [2021-06-12 20:02:32,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:32,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:02:32,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:32,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:32,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:32,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:32,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:32,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:32,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:32,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 20:02:32,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:32,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:32,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:32,840 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:32,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:32,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:02:32,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:32,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227457506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:32,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:32,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:02:32,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132876543] [2021-06-12 20:02:32,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:02:32,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:32,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:02:32,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:02:32,854 INFO L87 Difference]: Start difference. First operand 505 states and 1603 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:33,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:33,021 INFO L93 Difference]: Finished difference Result 777 states and 2407 transitions. [2021-06-12 20:02:33,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:33,021 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:33,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:33,022 INFO L225 Difference]: With dead ends: 777 [2021-06-12 20:02:33,022 INFO L226 Difference]: Without dead ends: 755 [2021-06-12 20:02:33,023 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:33,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-06-12 20:02:33,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 502. [2021-06-12 20:02:33,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.1816367265469063) internal successors, (1594), 501 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:33,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1594 transitions. [2021-06-12 20:02:33,029 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1594 transitions. Word has length 21 [2021-06-12 20:02:33,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:33,029 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 1594 transitions. [2021-06-12 20:02:33,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:33,029 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1594 transitions. [2021-06-12 20:02:33,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:33,029 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:33,029 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:33,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2726 [2021-06-12 20:02:33,230 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:33,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:33,230 INFO L82 PathProgramCache]: Analyzing trace with hash -940974683, now seen corresponding path program 552 times [2021-06-12 20:02:33,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:33,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268912618] [2021-06-12 20:02:33,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:33,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:33,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268912618] [2021-06-12 20:02:33,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268912618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:33,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319399690] [2021-06-12 20:02:33,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:33,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:02:33,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:33,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:33,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:33,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:33,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:33,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:33,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:33,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:02:33,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:33,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:33,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:33,431 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:33,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:33,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:02:33,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:33,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319399690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:33,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:33,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:02:33,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134311247] [2021-06-12 20:02:33,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:02:33,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:33,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:02:33,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:33,440 INFO L87 Difference]: Start difference. First operand 502 states and 1594 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:33,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:33,592 INFO L93 Difference]: Finished difference Result 668 states and 2085 transitions. [2021-06-12 20:02:33,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:33,592 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:33,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:33,593 INFO L225 Difference]: With dead ends: 668 [2021-06-12 20:02:33,593 INFO L226 Difference]: Without dead ends: 646 [2021-06-12 20:02:33,593 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 141.3ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:33,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-06-12 20:02:33,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 508. [2021-06-12 20:02:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 3.185404339250493) internal successors, (1615), 507 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:33,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1615 transitions. [2021-06-12 20:02:33,599 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1615 transitions. Word has length 21 [2021-06-12 20:02:33,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:33,599 INFO L482 AbstractCegarLoop]: Abstraction has 508 states and 1615 transitions. [2021-06-12 20:02:33,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:33,599 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1615 transitions. [2021-06-12 20:02:33,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:33,600 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:33,600 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:33,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2728,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:33,800 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:33,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:33,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1442766019, now seen corresponding path program 553 times [2021-06-12 20:02:33,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:33,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244147969] [2021-06-12 20:02:33,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:33,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:33,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244147969] [2021-06-12 20:02:33,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244147969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:33,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037204412] [2021-06-12 20:02:33,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:33,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:33,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:33,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:33,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:33,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:33,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:33,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:02:33,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:33,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:33,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:33,996 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:33,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:33,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:02:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:34,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037204412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:34,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:34,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:02:34,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782685140] [2021-06-12 20:02:34,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:02:34,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:34,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:02:34,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:34,011 INFO L87 Difference]: Start difference. First operand 508 states and 1615 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:34,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:34,196 INFO L93 Difference]: Finished difference Result 659 states and 2061 transitions. [2021-06-12 20:02:34,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:34,197 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:34,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:34,198 INFO L225 Difference]: With dead ends: 659 [2021-06-12 20:02:34,198 INFO L226 Difference]: Without dead ends: 637 [2021-06-12 20:02:34,198 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 140.6ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:34,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-06-12 20:02:34,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 505. [2021-06-12 20:02:34,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.1805555555555554) internal successors, (1603), 504 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:34,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1603 transitions. [2021-06-12 20:02:34,203 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1603 transitions. Word has length 21 [2021-06-12 20:02:34,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:34,203 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1603 transitions. [2021-06-12 20:02:34,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:34,203 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1603 transitions. [2021-06-12 20:02:34,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:34,204 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:34,204 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:34,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2731 [2021-06-12 20:02:34,404 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:34,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:34,405 INFO L82 PathProgramCache]: Analyzing trace with hash 745417157, now seen corresponding path program 554 times [2021-06-12 20:02:34,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:34,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421589386] [2021-06-12 20:02:34,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:34,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:34,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:34,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:34,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421589386] [2021-06-12 20:02:34,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421589386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:34,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801003708] [2021-06-12 20:02:34,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:34,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:34,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:34,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:34,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:34,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:34,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:34,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:34,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:34,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:02:34,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:34,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:34,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:34,610 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:34,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:34,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:02:34,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:34,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801003708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:34,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:34,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:02:34,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096803698] [2021-06-12 20:02:34,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:02:34,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:34,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:02:34,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:34,624 INFO L87 Difference]: Start difference. First operand 505 states and 1603 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:34,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:34,774 INFO L93 Difference]: Finished difference Result 662 states and 2067 transitions. [2021-06-12 20:02:34,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:34,775 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:34,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:34,776 INFO L225 Difference]: With dead ends: 662 [2021-06-12 20:02:34,776 INFO L226 Difference]: Without dead ends: 640 [2021-06-12 20:02:34,776 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:34,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-12 20:02:34,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 502. [2021-06-12 20:02:34,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.1816367265469063) internal successors, (1594), 501 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:34,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1594 transitions. [2021-06-12 20:02:34,781 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1594 transitions. Word has length 21 [2021-06-12 20:02:34,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:34,781 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 1594 transitions. [2021-06-12 20:02:34,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:34,781 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1594 transitions. [2021-06-12 20:02:34,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:34,782 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:34,782 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:34,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2734,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:34,982 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:34,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:34,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1816797097, now seen corresponding path program 555 times [2021-06-12 20:02:34,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:34,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991633854] [2021-06-12 20:02:34,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:35,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:35,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991633854] [2021-06-12 20:02:35,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991633854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:35,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512371343] [2021-06-12 20:02:35,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:35,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:02:35,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:35,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:35,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:35,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:35,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:35,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:35,133 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:35,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:35,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:35,142 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:02:35,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:35,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:35,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:35,198 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:35,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:35,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:02:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:35,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512371343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:35,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:35,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:02:35,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478068389] [2021-06-12 20:02:35,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:02:35,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:35,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:02:35,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:35,207 INFO L87 Difference]: Start difference. First operand 502 states and 1594 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:35,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:35,393 INFO L93 Difference]: Finished difference Result 676 states and 2108 transitions. [2021-06-12 20:02:35,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:35,393 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:35,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:35,394 INFO L225 Difference]: With dead ends: 676 [2021-06-12 20:02:35,394 INFO L226 Difference]: Without dead ends: 654 [2021-06-12 20:02:35,394 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 174.6ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:35,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-06-12 20:02:35,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 508. [2021-06-12 20:02:35,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 3.1834319526627217) internal successors, (1614), 507 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:35,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1614 transitions. [2021-06-12 20:02:35,400 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1614 transitions. Word has length 21 [2021-06-12 20:02:35,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:35,400 INFO L482 AbstractCegarLoop]: Abstraction has 508 states and 1614 transitions. [2021-06-12 20:02:35,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:35,400 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1614 transitions. [2021-06-12 20:02:35,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:35,401 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:35,401 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:35,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2737,556 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:35,601 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:35,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:35,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1976378863, now seen corresponding path program 556 times [2021-06-12 20:02:35,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:35,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040258443] [2021-06-12 20:02:35,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:35,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:35,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:35,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040258443] [2021-06-12 20:02:35,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040258443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:35,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294913108] [2021-06-12 20:02:35,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:35,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:35,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:35,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:35,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:35,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:35,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:35,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:35,746 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:35,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:35,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:35,756 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:02:35,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:35,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:35,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:35,797 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:35,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:35,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:02:35,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:35,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294913108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:35,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:35,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:02:35,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717570093] [2021-06-12 20:02:35,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:02:35,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:35,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:02:35,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:02:35,811 INFO L87 Difference]: Start difference. First operand 508 states and 1614 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:35,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:35,999 INFO L93 Difference]: Finished difference Result 667 states and 2084 transitions. [2021-06-12 20:02:35,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:35,999 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:35,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:36,000 INFO L225 Difference]: With dead ends: 667 [2021-06-12 20:02:36,000 INFO L226 Difference]: Without dead ends: 645 [2021-06-12 20:02:36,000 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 160.8ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:36,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-06-12 20:02:36,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 505. [2021-06-12 20:02:36,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.1785714285714284) internal successors, (1602), 504 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:36,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1602 transitions. [2021-06-12 20:02:36,005 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1602 transitions. Word has length 21 [2021-06-12 20:02:36,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:36,005 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1602 transitions. [2021-06-12 20:02:36,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:36,006 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1602 transitions. [2021-06-12 20:02:36,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:36,006 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:36,006 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:36,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2741,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:36,207 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:36,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:36,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1062795887, now seen corresponding path program 557 times [2021-06-12 20:02:36,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:36,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982228446] [2021-06-12 20:02:36,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:36,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:36,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982228446] [2021-06-12 20:02:36,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982228446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:36,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318063451] [2021-06-12 20:02:36,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:36,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:02:36,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:36,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:36,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:36,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:36,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:36,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:36,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:36,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:36,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:36,365 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:02:36,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:36,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:36,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:36,423 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:36,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:36,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:36,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:36,431 INFO L518 ElimStorePlain]: Eliminatee v_prenex_131 vanished before elimination [2021-06-12 20:02:36,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:36,432 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:15 [2021-06-12 20:02:36,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:36,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318063451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:36,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:36,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:02:36,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130108332] [2021-06-12 20:02:36,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:02:36,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:36,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:02:36,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:36,458 INFO L87 Difference]: Start difference. First operand 505 states and 1602 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:36,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:36,687 INFO L93 Difference]: Finished difference Result 685 states and 2134 transitions. [2021-06-12 20:02:36,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:36,687 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:36,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:36,688 INFO L225 Difference]: With dead ends: 685 [2021-06-12 20:02:36,688 INFO L226 Difference]: Without dead ends: 656 [2021-06-12 20:02:36,689 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 181.2ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:36,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-06-12 20:02:36,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 502. [2021-06-12 20:02:36,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.1816367265469063) internal successors, (1594), 501 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:36,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1594 transitions. [2021-06-12 20:02:36,694 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1594 transitions. Word has length 21 [2021-06-12 20:02:36,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:36,694 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 1594 transitions. [2021-06-12 20:02:36,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:36,694 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1594 transitions. [2021-06-12 20:02:36,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:36,695 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:36,695 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:36,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2745,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:36,895 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:36,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:36,895 INFO L82 PathProgramCache]: Analyzing trace with hash -656188795, now seen corresponding path program 558 times [2021-06-12 20:02:36,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:36,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858062551] [2021-06-12 20:02:36,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:36,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:36,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:36,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858062551] [2021-06-12 20:02:36,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858062551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:36,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993118247] [2021-06-12 20:02:36,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:37,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:02:37,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:37,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:37,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:37,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:37,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:37,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:37,050 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:37,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:37,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:37,059 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:02:37,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:37,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:37,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:37,096 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:37,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:37,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:37,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:37,107 INFO L518 ElimStorePlain]: Eliminatee v_prenex_133 vanished before elimination [2021-06-12 20:02:37,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:37,108 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:21 [2021-06-12 20:02:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:37,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993118247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:37,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:37,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:02:37,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383947586] [2021-06-12 20:02:37,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:02:37,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:37,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:02:37,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:02:37,142 INFO L87 Difference]: Start difference. First operand 502 states and 1594 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:37,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:37,338 INFO L93 Difference]: Finished difference Result 688 states and 2142 transitions. [2021-06-12 20:02:37,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:37,339 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:37,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:37,339 INFO L225 Difference]: With dead ends: 688 [2021-06-12 20:02:37,339 INFO L226 Difference]: Without dead ends: 659 [2021-06-12 20:02:37,340 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:37,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-06-12 20:02:37,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 501. [2021-06-12 20:02:37,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 3.178) internal successors, (1589), 500 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:37,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1589 transitions. [2021-06-12 20:02:37,345 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1589 transitions. Word has length 21 [2021-06-12 20:02:37,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:37,345 INFO L482 AbstractCegarLoop]: Abstraction has 501 states and 1589 transitions. [2021-06-12 20:02:37,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:37,345 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1589 transitions. [2021-06-12 20:02:37,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:37,346 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:37,346 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:37,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2754 [2021-06-12 20:02:37,546 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:37,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:37,546 INFO L82 PathProgramCache]: Analyzing trace with hash 740198383, now seen corresponding path program 559 times [2021-06-12 20:02:37,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:37,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659276994] [2021-06-12 20:02:37,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:37,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:37,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:37,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659276994] [2021-06-12 20:02:37,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659276994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:37,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933540860] [2021-06-12 20:02:37,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:37,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:37,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:37,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:37,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:37,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:37,704 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:37,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:37,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:37,714 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:02:37,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:37,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:37,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:37,762 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:37,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:37,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:02:37,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:37,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933540860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:37,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:37,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:02:37,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978558685] [2021-06-12 20:02:37,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:02:37,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:37,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:02:37,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:37,776 INFO L87 Difference]: Start difference. First operand 501 states and 1589 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:37,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:37,997 INFO L93 Difference]: Finished difference Result 666 states and 2078 transitions. [2021-06-12 20:02:37,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:37,998 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:37,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:37,999 INFO L225 Difference]: With dead ends: 666 [2021-06-12 20:02:37,999 INFO L226 Difference]: Without dead ends: 644 [2021-06-12 20:02:37,999 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 167.0ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:37,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-06-12 20:02:38,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 504. [2021-06-12 20:02:38,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 3.1789264413518885) internal successors, (1599), 503 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:38,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1599 transitions. [2021-06-12 20:02:38,004 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1599 transitions. Word has length 21 [2021-06-12 20:02:38,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:38,004 INFO L482 AbstractCegarLoop]: Abstraction has 504 states and 1599 transitions. [2021-06-12 20:02:38,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:38,004 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1599 transitions. [2021-06-12 20:02:38,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:38,005 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:38,005 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:38,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2760 [2021-06-12 20:02:38,205 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:38,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:38,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1504811267, now seen corresponding path program 560 times [2021-06-12 20:02:38,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:38,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793536581] [2021-06-12 20:02:38,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:38,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:38,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:38,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793536581] [2021-06-12 20:02:38,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793536581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:38,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281919076] [2021-06-12 20:02:38,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:38,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:38,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:38,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:38,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:38,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:38,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:38,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:38,366 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:38,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:38,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:38,375 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:02:38,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:38,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:38,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:38,413 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:38,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:38,416 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:38,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:38,424 INFO L518 ElimStorePlain]: Eliminatee v_prenex_135 vanished before elimination [2021-06-12 20:02:38,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:38,425 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:21 [2021-06-12 20:02:38,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:38,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281919076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:38,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:38,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:02:38,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183076446] [2021-06-12 20:02:38,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:02:38,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:38,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:02:38,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:38,462 INFO L87 Difference]: Start difference. First operand 504 states and 1599 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:38,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:38,701 INFO L93 Difference]: Finished difference Result 681 states and 2122 transitions. [2021-06-12 20:02:38,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:38,701 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:38,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:38,702 INFO L225 Difference]: With dead ends: 681 [2021-06-12 20:02:38,702 INFO L226 Difference]: Without dead ends: 652 [2021-06-12 20:02:38,702 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 175.1ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:38,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-12 20:02:38,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 500. [2021-06-12 20:02:38,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 3.176352705410822) internal successors, (1585), 499 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:38,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1585 transitions. [2021-06-12 20:02:38,707 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1585 transitions. Word has length 21 [2021-06-12 20:02:38,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:38,707 INFO L482 AbstractCegarLoop]: Abstraction has 500 states and 1585 transitions. [2021-06-12 20:02:38,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:38,707 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1585 transitions. [2021-06-12 20:02:38,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:38,708 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:38,708 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:38,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2764,561 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:38,908 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:38,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:38,909 INFO L82 PathProgramCache]: Analyzing trace with hash 88063813, now seen corresponding path program 561 times [2021-06-12 20:02:38,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:38,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769462359] [2021-06-12 20:02:38,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:38,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:38,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:38,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:38,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769462359] [2021-06-12 20:02:38,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769462359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:38,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277326981] [2021-06-12 20:02:38,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:39,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:02:39,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:39,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:39,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:39,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:39,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:39,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:39,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:39,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:39,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:39,040 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:02:39,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:39,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:39,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:39,072 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:39,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:39,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:02:39,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:39,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277326981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:39,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:39,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:02:39,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280643536] [2021-06-12 20:02:39,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:02:39,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:39,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:02:39,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:02:39,086 INFO L87 Difference]: Start difference. First operand 500 states and 1585 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:39,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:39,283 INFO L93 Difference]: Finished difference Result 853 states and 2638 transitions. [2021-06-12 20:02:39,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:39,283 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:39,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:39,284 INFO L225 Difference]: With dead ends: 853 [2021-06-12 20:02:39,284 INFO L226 Difference]: Without dead ends: 831 [2021-06-12 20:02:39,284 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 125.9ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:39,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-06-12 20:02:39,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 502. [2021-06-12 20:02:39,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.1736526946107784) internal successors, (1590), 501 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:39,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1590 transitions. [2021-06-12 20:02:39,290 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1590 transitions. Word has length 21 [2021-06-12 20:02:39,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:39,291 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 1590 transitions. [2021-06-12 20:02:39,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:39,291 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1590 transitions. [2021-06-12 20:02:39,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:39,291 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:39,291 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:39,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2770,562 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:39,492 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:39,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:39,492 INFO L82 PathProgramCache]: Analyzing trace with hash -2079151335, now seen corresponding path program 562 times [2021-06-12 20:02:39,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:39,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638472840] [2021-06-12 20:02:39,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:39,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:39,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:39,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638472840] [2021-06-12 20:02:39,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638472840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:39,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377062146] [2021-06-12 20:02:39,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:39,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:39,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:39,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:39,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:39,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:39,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:39,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:39,633 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:39,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:39,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:39,640 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:02:39,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:39,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:39,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:39,697 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:39,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:39,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:02:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:39,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377062146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:39,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:39,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:02:39,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164253806] [2021-06-12 20:02:39,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:02:39,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:39,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:02:39,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:39,716 INFO L87 Difference]: Start difference. First operand 502 states and 1590 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:39,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:39,948 INFO L93 Difference]: Finished difference Result 776 states and 2411 transitions. [2021-06-12 20:02:39,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:39,949 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:39,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:39,950 INFO L225 Difference]: With dead ends: 776 [2021-06-12 20:02:39,950 INFO L226 Difference]: Without dead ends: 754 [2021-06-12 20:02:39,950 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 183.4ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:02:39,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-06-12 20:02:39,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 504. [2021-06-12 20:02:39,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 3.1709741550695827) internal successors, (1595), 503 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:39,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1595 transitions. [2021-06-12 20:02:39,956 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1595 transitions. Word has length 21 [2021-06-12 20:02:39,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:39,956 INFO L482 AbstractCegarLoop]: Abstraction has 504 states and 1595 transitions. [2021-06-12 20:02:39,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:39,956 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1595 transitions. [2021-06-12 20:02:39,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:39,957 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:39,957 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:40,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2773 [2021-06-12 20:02:40,157 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:40,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:40,157 INFO L82 PathProgramCache]: Analyzing trace with hash -29193689, now seen corresponding path program 563 times [2021-06-12 20:02:40,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:40,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610813986] [2021-06-12 20:02:40,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:40,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:40,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610813986] [2021-06-12 20:02:40,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610813986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:40,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630461975] [2021-06-12 20:02:40,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:40,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:40,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:40,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:40,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:40,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:40,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:40,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:40,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:40,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:40,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:40,302 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:02:40,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:40,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:40,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:40,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:40,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:40,352 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:40,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:40,353 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-06-12 20:02:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:40,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630461975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:40,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:40,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:02:40,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285127510] [2021-06-12 20:02:40,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:02:40,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:40,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:02:40,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:40,388 INFO L87 Difference]: Start difference. First operand 504 states and 1595 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:40,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:40,619 INFO L93 Difference]: Finished difference Result 787 states and 2438 transitions. [2021-06-12 20:02:40,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:40,620 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:40,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:40,621 INFO L225 Difference]: With dead ends: 787 [2021-06-12 20:02:40,621 INFO L226 Difference]: Without dead ends: 758 [2021-06-12 20:02:40,621 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 214.9ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:02:40,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-06-12 20:02:40,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 500. [2021-06-12 20:02:40,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 3.164328657314629) internal successors, (1579), 499 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:40,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1579 transitions. [2021-06-12 20:02:40,627 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1579 transitions. Word has length 21 [2021-06-12 20:02:40,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:40,627 INFO L482 AbstractCegarLoop]: Abstraction has 500 states and 1579 transitions. [2021-06-12 20:02:40,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:40,627 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1579 transitions. [2021-06-12 20:02:40,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:40,627 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:40,627 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:40,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2777 [2021-06-12 20:02:40,828 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:40,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:40,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1865307033, now seen corresponding path program 564 times [2021-06-12 20:02:40,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:40,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638510981] [2021-06-12 20:02:40,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:40,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:40,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:40,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638510981] [2021-06-12 20:02:40,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638510981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:40,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184814502] [2021-06-12 20:02:40,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:40,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:02:40,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:40,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:40,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:40,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:40,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:40,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:40,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:40,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 20:02:40,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:40,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:40,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:40,962 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:40,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:40,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:02:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:40,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184814502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:40,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:40,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:02:40,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051557206] [2021-06-12 20:02:40,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:02:40,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:40,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:02:40,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:02:40,971 INFO L87 Difference]: Start difference. First operand 500 states and 1579 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:41,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:41,093 INFO L93 Difference]: Finished difference Result 678 states and 2097 transitions. [2021-06-12 20:02:41,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:41,093 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:41,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:41,094 INFO L225 Difference]: With dead ends: 678 [2021-06-12 20:02:41,094 INFO L226 Difference]: Without dead ends: 656 [2021-06-12 20:02:41,095 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:02:41,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-06-12 20:02:41,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 500. [2021-06-12 20:02:41,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 3.164328657314629) internal successors, (1579), 499 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:41,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1579 transitions. [2021-06-12 20:02:41,100 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1579 transitions. Word has length 21 [2021-06-12 20:02:41,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:41,100 INFO L482 AbstractCegarLoop]: Abstraction has 500 states and 1579 transitions. [2021-06-12 20:02:41,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:41,100 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1579 transitions. [2021-06-12 20:02:41,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:41,101 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:41,101 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:41,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2782,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:41,301 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:41,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:41,301 INFO L82 PathProgramCache]: Analyzing trace with hash 486960071, now seen corresponding path program 565 times [2021-06-12 20:02:41,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:41,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114479404] [2021-06-12 20:02:41,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:41,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:41,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:41,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114479404] [2021-06-12 20:02:41,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114479404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:41,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010183387] [2021-06-12 20:02:41,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:41,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:41,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:41,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:41,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:41,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:41,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:41,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 20:02:41,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:41,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:41,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:41,449 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:41,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:41,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:02:41,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:41,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010183387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:41,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:41,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:02:41,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650213625] [2021-06-12 20:02:41,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:02:41,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:41,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:02:41,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:02:41,458 INFO L87 Difference]: Start difference. First operand 500 states and 1579 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:41,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:41,580 INFO L93 Difference]: Finished difference Result 615 states and 1917 transitions. [2021-06-12 20:02:41,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:41,581 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:41,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:41,582 INFO L225 Difference]: With dead ends: 615 [2021-06-12 20:02:41,582 INFO L226 Difference]: Without dead ends: 593 [2021-06-12 20:02:41,582 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:02:41,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-06-12 20:02:41,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 506. [2021-06-12 20:02:41,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.1683168316831685) internal successors, (1600), 505 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:41,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1600 transitions. [2021-06-12 20:02:41,587 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1600 transitions. Word has length 21 [2021-06-12 20:02:41,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:41,587 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1600 transitions. [2021-06-12 20:02:41,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:41,587 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1600 transitions. [2021-06-12 20:02:41,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:41,588 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:41,588 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:41,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2784 [2021-06-12 20:02:41,788 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:41,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:41,788 INFO L82 PathProgramCache]: Analyzing trace with hash -14831265, now seen corresponding path program 566 times [2021-06-12 20:02:41,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:41,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431015633] [2021-06-12 20:02:41,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:41,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:41,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:41,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431015633] [2021-06-12 20:02:41,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431015633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:41,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029675204] [2021-06-12 20:02:41,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:41,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:41,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:41,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:41,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:41,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:41,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:41,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:41,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:41,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 20:02:41,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:41,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:41,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:41,945 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:41,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:41,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:02:41,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:41,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029675204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:41,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:41,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:02:41,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868505645] [2021-06-12 20:02:41,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:02:41,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:41,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:02:41,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:02:41,959 INFO L87 Difference]: Start difference. First operand 506 states and 1600 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:42,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:42,062 INFO L93 Difference]: Finished difference Result 624 states and 1941 transitions. [2021-06-12 20:02:42,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:42,062 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:42,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:42,063 INFO L225 Difference]: With dead ends: 624 [2021-06-12 20:02:42,063 INFO L226 Difference]: Without dead ends: 602 [2021-06-12 20:02:42,063 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:02:42,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-06-12 20:02:42,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 503. [2021-06-12 20:02:42,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 3.1633466135458166) internal successors, (1588), 502 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:42,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1588 transitions. [2021-06-12 20:02:42,069 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1588 transitions. Word has length 21 [2021-06-12 20:02:42,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:42,069 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1588 transitions. [2021-06-12 20:02:42,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:42,069 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1588 transitions. [2021-06-12 20:02:42,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:42,070 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:42,070 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:42,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2786,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:42,270 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:42,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:42,270 INFO L82 PathProgramCache]: Analyzing trace with hash -2121615385, now seen corresponding path program 567 times [2021-06-12 20:02:42,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:42,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46542151] [2021-06-12 20:02:42,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:42,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:42,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:42,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46542151] [2021-06-12 20:02:42,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46542151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:42,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843358222] [2021-06-12 20:02:42,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:42,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:02:42,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:42,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:42,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:42,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:42,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:42,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:42,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:42,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 20:02:42,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:42,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:42,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:42,421 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:42,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:42,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:02:42,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:42,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843358222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:42,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:42,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:02:42,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621476156] [2021-06-12 20:02:42,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:02:42,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:42,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:02:42,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:02:42,435 INFO L87 Difference]: Start difference. First operand 503 states and 1588 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:42,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:42,556 INFO L93 Difference]: Finished difference Result 612 states and 1908 transitions. [2021-06-12 20:02:42,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:42,556 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:42,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:42,557 INFO L225 Difference]: With dead ends: 612 [2021-06-12 20:02:42,557 INFO L226 Difference]: Without dead ends: 590 [2021-06-12 20:02:42,557 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:02:42,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-06-12 20:02:42,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 497. [2021-06-12 20:02:42,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.1653225806451615) internal successors, (1570), 496 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:42,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1570 transitions. [2021-06-12 20:02:42,562 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1570 transitions. Word has length 21 [2021-06-12 20:02:42,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:42,562 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1570 transitions. [2021-06-12 20:02:42,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:42,562 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1570 transitions. [2021-06-12 20:02:42,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:42,563 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:42,563 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:42,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 568 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2788 [2021-06-12 20:02:42,763 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:42,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:42,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1267485953, now seen corresponding path program 568 times [2021-06-12 20:02:42,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:42,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205994627] [2021-06-12 20:02:42,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:42,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:42,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:42,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:42,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205994627] [2021-06-12 20:02:42,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205994627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:42,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498310054] [2021-06-12 20:02:42,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:42,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:42,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:42,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:42,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:42,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:42,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:42,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:42,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:42,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2021-06-12 20:02:42,994 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 20:02:42,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:42,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:42,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:02:42,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:43,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:43,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:43,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:02:43,011 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:43,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:43,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:43,020 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:45, output treesize:5 [2021-06-12 20:02:43,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:43,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498310054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:43,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:43,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:43,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323779189] [2021-06-12 20:02:43,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:43,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:43,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:43,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:43,047 INFO L87 Difference]: Start difference. First operand 497 states and 1570 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:43,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:43,287 INFO L93 Difference]: Finished difference Result 877 states and 2702 transitions. [2021-06-12 20:02:43,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:02:43,287 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:43,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:43,288 INFO L225 Difference]: With dead ends: 877 [2021-06-12 20:02:43,288 INFO L226 Difference]: Without dead ends: 838 [2021-06-12 20:02:43,289 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 213.0ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:02:43,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-06-12 20:02:43,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 501. [2021-06-12 20:02:43,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 3.16) internal successors, (1580), 500 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:43,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1580 transitions. [2021-06-12 20:02:43,295 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1580 transitions. Word has length 21 [2021-06-12 20:02:43,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:43,295 INFO L482 AbstractCegarLoop]: Abstraction has 501 states and 1580 transitions. [2021-06-12 20:02:43,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:43,295 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1580 transitions. [2021-06-12 20:02:43,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:43,296 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:43,296 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:43,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2790,569 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:43,496 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:43,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:43,497 INFO L82 PathProgramCache]: Analyzing trace with hash 128016029, now seen corresponding path program 569 times [2021-06-12 20:02:43,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:43,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695898206] [2021-06-12 20:02:43,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:43,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:43,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:43,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695898206] [2021-06-12 20:02:43,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695898206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:43,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516900726] [2021-06-12 20:02:43,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:43,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:43,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:43,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:43,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:43,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:43,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:43,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:43,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:43,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:43,666 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:43,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:43,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:02:43,675 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:35, output treesize:18 [2021-06-12 20:02:43,772 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 20:02:43,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:43,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:43,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:43,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:43,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:02:43,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:43,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:43,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:43,790 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:28, output treesize:7 [2021-06-12 20:02:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:43,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516900726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:43,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:43,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:43,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716780890] [2021-06-12 20:02:43,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:43,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:43,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:43,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:43,824 INFO L87 Difference]: Start difference. First operand 501 states and 1580 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:44,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:44,366 INFO L93 Difference]: Finished difference Result 987 states and 3041 transitions. [2021-06-12 20:02:44,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:02:44,366 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:44,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:44,367 INFO L225 Difference]: With dead ends: 987 [2021-06-12 20:02:44,367 INFO L226 Difference]: Without dead ends: 968 [2021-06-12 20:02:44,368 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 373.8ms TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:02:44,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-06-12 20:02:44,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 497. [2021-06-12 20:02:44,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.1653225806451615) internal successors, (1570), 496 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:44,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1570 transitions. [2021-06-12 20:02:44,379 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1570 transitions. Word has length 21 [2021-06-12 20:02:44,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:44,379 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1570 transitions. [2021-06-12 20:02:44,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:44,379 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1570 transitions. [2021-06-12 20:02:44,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:44,380 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:44,380 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:44,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 570 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2798 [2021-06-12 20:02:44,580 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:44,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:44,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1361649761, now seen corresponding path program 570 times [2021-06-12 20:02:44,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:44,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662486796] [2021-06-12 20:02:44,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:44,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:44,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:44,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662486796] [2021-06-12 20:02:44,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662486796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:44,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791010531] [2021-06-12 20:02:44,663 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:44,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:02:44,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:44,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:44,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:44,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:44,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:44,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:44,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:26 [2021-06-12 20:02:44,809 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 20:02:44,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:44,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:02:44,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:44,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:02:44,826 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:44,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:44,835 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:45, output treesize:5 [2021-06-12 20:02:44,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:44,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791010531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:44,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:44,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:44,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500412618] [2021-06-12 20:02:44,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:44,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:44,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:44,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:44,862 INFO L87 Difference]: Start difference. First operand 497 states and 1570 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:45,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:45,077 INFO L93 Difference]: Finished difference Result 801 states and 2463 transitions. [2021-06-12 20:02:45,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:02:45,078 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:45,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:45,079 INFO L225 Difference]: With dead ends: 801 [2021-06-12 20:02:45,079 INFO L226 Difference]: Without dead ends: 741 [2021-06-12 20:02:45,079 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 177.4ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:02:45,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-06-12 20:02:45,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 500. [2021-06-12 20:02:45,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 3.164328657314629) internal successors, (1579), 499 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:45,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1579 transitions. [2021-06-12 20:02:45,084 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1579 transitions. Word has length 21 [2021-06-12 20:02:45,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:45,084 INFO L482 AbstractCegarLoop]: Abstraction has 500 states and 1579 transitions. [2021-06-12 20:02:45,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:45,085 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1579 transitions. [2021-06-12 20:02:45,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:45,085 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:45,085 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:45,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2804 [2021-06-12 20:02:45,285 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:45,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:45,286 INFO L82 PathProgramCache]: Analyzing trace with hash -338847589, now seen corresponding path program 571 times [2021-06-12 20:02:45,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:45,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104134925] [2021-06-12 20:02:45,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:45,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:45,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:45,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104134925] [2021-06-12 20:02:45,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104134925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:45,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914856957] [2021-06-12 20:02:45,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:45,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:45,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:45,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:45,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:45,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:45,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:45,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:45,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 20:02:45,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:02:45,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:45,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:45,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:45,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:45,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:45,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:45,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:02:45,514 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:45,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:45,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:45,523 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:45, output treesize:13 [2021-06-12 20:02:45,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:45,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914856957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:45,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:45,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:45,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127322918] [2021-06-12 20:02:45,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:45,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:45,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:45,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:45,569 INFO L87 Difference]: Start difference. First operand 500 states and 1579 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:45,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:45,789 INFO L93 Difference]: Finished difference Result 697 states and 2169 transitions. [2021-06-12 20:02:45,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:02:45,789 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:45,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:45,790 INFO L225 Difference]: With dead ends: 697 [2021-06-12 20:02:45,790 INFO L226 Difference]: Without dead ends: 670 [2021-06-12 20:02:45,790 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 188.3ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:02:45,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-06-12 20:02:45,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 503. [2021-06-12 20:02:45,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 3.1653386454183265) internal successors, (1589), 502 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:45,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1589 transitions. [2021-06-12 20:02:45,795 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1589 transitions. Word has length 21 [2021-06-12 20:02:45,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:45,796 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1589 transitions. [2021-06-12 20:02:45,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:45,796 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1589 transitions. [2021-06-12 20:02:45,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:45,796 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:45,796 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:45,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2812 [2021-06-12 20:02:45,997 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:45,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:45,997 INFO L82 PathProgramCache]: Analyzing trace with hash -623110273, now seen corresponding path program 572 times [2021-06-12 20:02:45,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:45,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948373632] [2021-06-12 20:02:45,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:45,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:46,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:46,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948373632] [2021-06-12 20:02:46,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948373632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:46,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647630057] [2021-06-12 20:02:46,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:46,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:46,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:46,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:46,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:46,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:46,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:46,169 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:46,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:46,178 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:02:46,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:46,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:46,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:46,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:02:46,233 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:46,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:46,245 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:13 [2021-06-12 20:02:46,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:46,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647630057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:46,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:46,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:46,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085940212] [2021-06-12 20:02:46,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:46,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:46,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:46,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:46,297 INFO L87 Difference]: Start difference. First operand 503 states and 1589 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:46,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:46,575 INFO L93 Difference]: Finished difference Result 725 states and 2245 transitions. [2021-06-12 20:02:46,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:02:46,575 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:46,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:46,576 INFO L225 Difference]: With dead ends: 725 [2021-06-12 20:02:46,576 INFO L226 Difference]: Without dead ends: 698 [2021-06-12 20:02:46,577 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 235.0ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:02:46,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-06-12 20:02:46,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 516. [2021-06-12 20:02:46,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 3.1611650485436895) internal successors, (1628), 515 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:46,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1628 transitions. [2021-06-12 20:02:46,582 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1628 transitions. Word has length 21 [2021-06-12 20:02:46,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:46,582 INFO L482 AbstractCegarLoop]: Abstraction has 516 states and 1628 transitions. [2021-06-12 20:02:46,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:46,583 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1628 transitions. [2021-06-12 20:02:46,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:46,583 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:46,583 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:46,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2818,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:46,784 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:46,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:46,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1063281567, now seen corresponding path program 573 times [2021-06-12 20:02:46,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:46,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105456084] [2021-06-12 20:02:46,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:46,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:46,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:46,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105456084] [2021-06-12 20:02:46,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105456084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:46,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461851884] [2021-06-12 20:02:46,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:46,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:02:46,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:46,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:02:46,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:46,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:46,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:02:46,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:46,976 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:46,979 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:47,010 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.3 percent of original size [2021-06-12 20:02:47,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:47,011 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:101, output treesize:51 [2021-06-12 20:02:47,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:47,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:47,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:47,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:47,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:47,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 20:02:47,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:47,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:47,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:47,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:47,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:02:47,104 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:47,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:47,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-12 20:02:47,107 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:47,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:47,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:47,122 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:21 [2021-06-12 20:02:47,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:47,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461851884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:47,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:47,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:47,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687035031] [2021-06-12 20:02:47,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:47,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:47,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:47,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:47,173 INFO L87 Difference]: Start difference. First operand 516 states and 1628 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:47,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:47,864 INFO L93 Difference]: Finished difference Result 715 states and 2190 transitions. [2021-06-12 20:02:47,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:02:47,864 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:47,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:47,865 INFO L225 Difference]: With dead ends: 715 [2021-06-12 20:02:47,865 INFO L226 Difference]: Without dead ends: 673 [2021-06-12 20:02:47,866 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 611.5ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:02:47,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-06-12 20:02:47,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 502. [2021-06-12 20:02:47,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.1756487025948106) internal successors, (1591), 501 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:47,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1591 transitions. [2021-06-12 20:02:47,871 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1591 transitions. Word has length 21 [2021-06-12 20:02:47,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:47,871 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 1591 transitions. [2021-06-12 20:02:47,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:47,871 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1591 transitions. [2021-06-12 20:02:47,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:47,872 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:47,872 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:48,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2826,574 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:48,073 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:48,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:48,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1048969205, now seen corresponding path program 574 times [2021-06-12 20:02:48,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:48,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170415435] [2021-06-12 20:02:48,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:48,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:48,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:48,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:48,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170415435] [2021-06-12 20:02:48,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170415435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:48,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254929494] [2021-06-12 20:02:48,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:48,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:48,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:48,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:48,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:48,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:48,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:48,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:48,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:48,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:48,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:48,197 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:02:48,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:48,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:48,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:48,222 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:48,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:48,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:02:48,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:48,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254929494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:48,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:48,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:02:48,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171165498] [2021-06-12 20:02:48,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:02:48,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:48,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:02:48,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:02:48,231 INFO L87 Difference]: Start difference. First operand 502 states and 1591 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:48,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:48,358 INFO L93 Difference]: Finished difference Result 872 states and 2704 transitions. [2021-06-12 20:02:48,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:48,359 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:48,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:48,360 INFO L225 Difference]: With dead ends: 872 [2021-06-12 20:02:48,360 INFO L226 Difference]: Without dead ends: 850 [2021-06-12 20:02:48,360 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:02:48,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-06-12 20:02:48,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 505. [2021-06-12 20:02:48,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.1785714285714284) internal successors, (1602), 504 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:48,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1602 transitions. [2021-06-12 20:02:48,367 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1602 transitions. Word has length 21 [2021-06-12 20:02:48,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:48,367 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1602 transitions. [2021-06-12 20:02:48,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:48,367 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1602 transitions. [2021-06-12 20:02:48,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:48,368 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:48,368 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:48,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2836,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:48,568 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:48,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:48,568 INFO L82 PathProgramCache]: Analyzing trace with hash -84054495, now seen corresponding path program 575 times [2021-06-12 20:02:48,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:48,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036750353] [2021-06-12 20:02:48,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:48,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:48,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036750353] [2021-06-12 20:02:48,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036750353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:48,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942487155] [2021-06-12 20:02:48,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:48,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:48,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:48,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:48,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:48,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:48,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:48,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:48,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:48,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:48,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:26 [2021-06-12 20:02:48,815 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 20:02:48,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:48,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:48,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:02:48,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:48,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:48,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:48,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:02:48,831 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:48,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:48,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:48,841 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:45, output treesize:5 [2021-06-12 20:02:48,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:48,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942487155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:48,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:48,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:48,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058814609] [2021-06-12 20:02:48,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:48,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:48,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:48,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:48,868 INFO L87 Difference]: Start difference. First operand 505 states and 1602 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:49,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:49,112 INFO L93 Difference]: Finished difference Result 900 states and 2764 transitions. [2021-06-12 20:02:49,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:02:49,112 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:49,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:49,114 INFO L225 Difference]: With dead ends: 900 [2021-06-12 20:02:49,114 INFO L226 Difference]: Without dead ends: 861 [2021-06-12 20:02:49,114 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 220.2ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:02:49,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-06-12 20:02:49,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 506. [2021-06-12 20:02:49,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.1702970297029704) internal successors, (1601), 505 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:49,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1601 transitions. [2021-06-12 20:02:49,120 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1601 transitions. Word has length 21 [2021-06-12 20:02:49,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:49,120 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1601 transitions. [2021-06-12 20:02:49,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:49,120 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1601 transitions. [2021-06-12 20:02:49,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:49,121 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:49,121 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:49,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2839 [2021-06-12 20:02:49,321 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:49,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:49,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1311447487, now seen corresponding path program 576 times [2021-06-12 20:02:49,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:49,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100406178] [2021-06-12 20:02:49,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:49,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:49,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100406178] [2021-06-12 20:02:49,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100406178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:49,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750936623] [2021-06-12 20:02:49,406 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:49,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:02:49,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:49,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:49,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:49,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:49,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:49,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:49,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:49,476 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:49,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:49,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:02:49,485 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:25 [2021-06-12 20:02:49,597 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 20:02:49,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:49,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:49,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:49,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:49,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:02:49,607 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:49,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:49,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:49,612 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:28, output treesize:7 [2021-06-12 20:02:49,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:49,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750936623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:49,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:49,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:49,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79283943] [2021-06-12 20:02:49,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:49,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:49,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:49,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:49,648 INFO L87 Difference]: Start difference. First operand 506 states and 1601 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:50,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:50,116 INFO L93 Difference]: Finished difference Result 933 states and 2862 transitions. [2021-06-12 20:02:50,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:02:50,116 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:50,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:50,117 INFO L225 Difference]: With dead ends: 933 [2021-06-12 20:02:50,117 INFO L226 Difference]: Without dead ends: 914 [2021-06-12 20:02:50,117 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 373.8ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:02:50,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2021-06-12 20:02:50,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 490. [2021-06-12 20:02:50,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.16359918200409) internal successors, (1547), 489 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:50,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1547 transitions. [2021-06-12 20:02:50,123 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1547 transitions. Word has length 21 [2021-06-12 20:02:50,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:50,123 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1547 transitions. [2021-06-12 20:02:50,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:50,124 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1547 transitions. [2021-06-12 20:02:50,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:50,124 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:50,124 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:50,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2847,577 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:50,325 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:50,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:50,325 INFO L82 PathProgramCache]: Analyzing trace with hash -633167109, now seen corresponding path program 577 times [2021-06-12 20:02:50,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:50,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751428483] [2021-06-12 20:02:50,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:50,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:50,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751428483] [2021-06-12 20:02:50,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751428483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:50,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865921151] [2021-06-12 20:02:50,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:50,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:50,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:50,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:50,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:50,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:50,446 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:50,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:50,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:50,453 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:02:50,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:50,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:50,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:50,479 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:50,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:50,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:02:50,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:50,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865921151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:50,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:50,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:02:50,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153934181] [2021-06-12 20:02:50,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:02:50,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:50,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:02:50,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:02:50,494 INFO L87 Difference]: Start difference. First operand 490 states and 1547 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:50,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:50,675 INFO L93 Difference]: Finished difference Result 775 states and 2407 transitions. [2021-06-12 20:02:50,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:50,676 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:50,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:50,677 INFO L225 Difference]: With dead ends: 775 [2021-06-12 20:02:50,677 INFO L226 Difference]: Without dead ends: 753 [2021-06-12 20:02:50,677 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:02:50,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-06-12 20:02:50,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 493. [2021-06-12 20:02:50,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.160569105691057) internal successors, (1555), 492 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:50,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1555 transitions. [2021-06-12 20:02:50,682 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1555 transitions. Word has length 21 [2021-06-12 20:02:50,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:50,683 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1555 transitions. [2021-06-12 20:02:50,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:50,683 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1555 transitions. [2021-06-12 20:02:50,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:50,683 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:50,683 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:50,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 578 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2858 [2021-06-12 20:02:50,884 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:50,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:50,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1247585829, now seen corresponding path program 578 times [2021-06-12 20:02:50,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:50,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991536372] [2021-06-12 20:02:50,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:50,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:50,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991536372] [2021-06-12 20:02:50,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991536372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:50,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300358440] [2021-06-12 20:02:50,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:50,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:50,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:50,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:50,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:50,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:50,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:51,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:51,002 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:51,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:51,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:51,008 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:02:51,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:51,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:51,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:51,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:51,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:51,039 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:51,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:51,039 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-12 20:02:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:51,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300358440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:51,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:51,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:02:51,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702597531] [2021-06-12 20:02:51,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:02:51,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:51,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:02:51,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:02:51,057 INFO L87 Difference]: Start difference. First operand 493 states and 1555 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:51,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:51,220 INFO L93 Difference]: Finished difference Result 783 states and 2427 transitions. [2021-06-12 20:02:51,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:51,220 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:51,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:51,221 INFO L225 Difference]: With dead ends: 783 [2021-06-12 20:02:51,221 INFO L226 Difference]: Without dead ends: 754 [2021-06-12 20:02:51,222 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:02:51,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-06-12 20:02:51,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 484. [2021-06-12 20:02:51,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.153209109730849) internal successors, (1523), 483 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:51,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1523 transitions. [2021-06-12 20:02:51,227 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1523 transitions. Word has length 21 [2021-06-12 20:02:51,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:51,227 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1523 transitions. [2021-06-12 20:02:51,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:51,227 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1523 transitions. [2021-06-12 20:02:51,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:51,228 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:51,228 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:51,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 579 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2862 [2021-06-12 20:02:51,428 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:51,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:51,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1053291013, now seen corresponding path program 579 times [2021-06-12 20:02:51,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:51,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656868921] [2021-06-12 20:02:51,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:51,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:51,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:51,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656868921] [2021-06-12 20:02:51,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656868921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:51,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965129846] [2021-06-12 20:02:51,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:51,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:02:51,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:51,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:51,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:51,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:51,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:51,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:51,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:51,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:02:51,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:51,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:51,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:51,657 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:51,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:51,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:02:51,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:51,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965129846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:51,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:51,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:02:51,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695932406] [2021-06-12 20:02:51,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:02:51,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:51,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:02:51,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:51,666 INFO L87 Difference]: Start difference. First operand 484 states and 1523 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:51,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:51,809 INFO L93 Difference]: Finished difference Result 638 states and 1978 transitions. [2021-06-12 20:02:51,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:51,809 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:51,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:51,810 INFO L225 Difference]: With dead ends: 638 [2021-06-12 20:02:51,810 INFO L226 Difference]: Without dead ends: 616 [2021-06-12 20:02:51,810 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:51,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-06-12 20:02:51,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 490. [2021-06-12 20:02:51,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.1574642126789367) internal successors, (1544), 489 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:51,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1544 transitions. [2021-06-12 20:02:51,815 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1544 transitions. Word has length 21 [2021-06-12 20:02:51,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:51,815 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1544 transitions. [2021-06-12 20:02:51,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:51,815 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1544 transitions. [2021-06-12 20:02:51,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:51,816 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:51,816 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:52,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2867 [2021-06-12 20:02:52,016 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:52,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:52,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1555082349, now seen corresponding path program 580 times [2021-06-12 20:02:52,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:52,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436382975] [2021-06-12 20:02:52,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:52,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:52,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:52,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:52,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436382975] [2021-06-12 20:02:52,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436382975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:52,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52013357] [2021-06-12 20:02:52,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:52,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:52,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:52,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:52,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:52,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:52,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:52,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:52,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:52,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:32 [2021-06-12 20:02:52,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:52,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:52,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:52,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:02:52,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:52,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:52,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:52,294 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 20:02:52,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:52,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52013357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:52,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:52,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:02:52,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757724553] [2021-06-12 20:02:52,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:02:52,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:52,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:02:52,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:52,314 INFO L87 Difference]: Start difference. First operand 490 states and 1544 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:52,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:52,434 INFO L93 Difference]: Finished difference Result 629 states and 1954 transitions. [2021-06-12 20:02:52,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:52,434 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:52,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:52,435 INFO L225 Difference]: With dead ends: 629 [2021-06-12 20:02:52,435 INFO L226 Difference]: Without dead ends: 607 [2021-06-12 20:02:52,435 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 159.8ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:52,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-12 20:02:52,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 487. [2021-06-12 20:02:52,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.152263374485597) internal successors, (1532), 486 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:52,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1532 transitions. [2021-06-12 20:02:52,440 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1532 transitions. Word has length 21 [2021-06-12 20:02:52,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:52,440 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1532 transitions. [2021-06-12 20:02:52,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:52,440 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1532 transitions. [2021-06-12 20:02:52,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:52,441 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:52,441 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:52,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2870,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:52,641 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:52,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:52,641 INFO L82 PathProgramCache]: Analyzing trace with hash 633100827, now seen corresponding path program 581 times [2021-06-12 20:02:52,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:52,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510202334] [2021-06-12 20:02:52,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:52,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:52,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510202334] [2021-06-12 20:02:52,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510202334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:52,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206958642] [2021-06-12 20:02:52,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:52,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:02:52,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:52,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:52,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:52,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:52,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:52,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:52,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:52,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 20:02:52,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:52,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:52,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:52,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:02:52,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:52,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:52,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:52,904 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 20:02:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:52,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206958642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:52,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:52,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:02:52,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242150587] [2021-06-12 20:02:52,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:02:52,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:52,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:02:52,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:52,923 INFO L87 Difference]: Start difference. First operand 487 states and 1532 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:53,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:53,128 INFO L93 Difference]: Finished difference Result 632 states and 1960 transitions. [2021-06-12 20:02:53,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:53,129 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:53,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:53,130 INFO L225 Difference]: With dead ends: 632 [2021-06-12 20:02:53,130 INFO L226 Difference]: Without dead ends: 610 [2021-06-12 20:02:53,130 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 177.0ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:02:53,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-06-12 20:02:53,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 484. [2021-06-12 20:02:53,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.153209109730849) internal successors, (1523), 483 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:53,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1523 transitions. [2021-06-12 20:02:53,135 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1523 transitions. Word has length 21 [2021-06-12 20:02:53,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:53,135 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1523 transitions. [2021-06-12 20:02:53,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:53,135 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1523 transitions. [2021-06-12 20:02:53,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:53,135 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:53,135 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:53,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2873 [2021-06-12 20:02:53,336 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:53,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:53,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1929113427, now seen corresponding path program 582 times [2021-06-12 20:02:53,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:53,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757481208] [2021-06-12 20:02:53,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:53,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:53,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757481208] [2021-06-12 20:02:53,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757481208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:53,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627326911] [2021-06-12 20:02:53,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:53,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:02:53,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:53,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:53,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:53,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:53,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:53,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:53,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:53,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:53,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:53,513 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:02:53,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:53,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:53,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:53,567 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:53,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:53,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:02:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:53,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627326911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:53,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:53,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:02:53,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440927598] [2021-06-12 20:02:53,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:02:53,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:53,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:02:53,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:53,576 INFO L87 Difference]: Start difference. First operand 484 states and 1523 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:53,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:53,715 INFO L93 Difference]: Finished difference Result 652 states and 2024 transitions. [2021-06-12 20:02:53,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:53,715 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:53,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:53,716 INFO L225 Difference]: With dead ends: 652 [2021-06-12 20:02:53,716 INFO L226 Difference]: Without dead ends: 630 [2021-06-12 20:02:53,716 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:53,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-06-12 20:02:53,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 491. [2021-06-12 20:02:53,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.1653061224489796) internal successors, (1551), 490 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:53,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1551 transitions. [2021-06-12 20:02:53,721 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1551 transitions. Word has length 21 [2021-06-12 20:02:53,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:53,721 INFO L482 AbstractCegarLoop]: Abstraction has 491 states and 1551 transitions. [2021-06-12 20:02:53,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:53,721 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1551 transitions. [2021-06-12 20:02:53,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:53,722 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:53,722 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:53,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2876 [2021-06-12 20:02:53,922 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:53,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:53,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1864062533, now seen corresponding path program 583 times [2021-06-12 20:02:53,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:53,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212718989] [2021-06-12 20:02:53,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:54,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:54,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:54,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212718989] [2021-06-12 20:02:54,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212718989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:54,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185663259] [2021-06-12 20:02:54,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:54,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:54,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:54,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:54,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:54,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:54,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:54,080 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:54,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:54,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:54,089 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:02:54,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:54,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:54,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:54,129 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:54,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:54,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:02:54,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:54,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185663259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:54,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:54,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:02:54,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865206029] [2021-06-12 20:02:54,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:02:54,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:54,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:02:54,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:02:54,142 INFO L87 Difference]: Start difference. First operand 491 states and 1551 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:54,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:54,265 INFO L93 Difference]: Finished difference Result 643 states and 2000 transitions. [2021-06-12 20:02:54,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:54,265 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:54,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:54,266 INFO L225 Difference]: With dead ends: 643 [2021-06-12 20:02:54,266 INFO L226 Difference]: Without dead ends: 621 [2021-06-12 20:02:54,266 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 122.5ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:02:54,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-12 20:02:54,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 488. [2021-06-12 20:02:54,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.1601642710472277) internal successors, (1539), 487 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:54,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1539 transitions. [2021-06-12 20:02:54,271 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1539 transitions. Word has length 21 [2021-06-12 20:02:54,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:54,271 INFO L482 AbstractCegarLoop]: Abstraction has 488 states and 1539 transitions. [2021-06-12 20:02:54,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:54,271 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1539 transitions. [2021-06-12 20:02:54,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:54,272 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:54,272 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:54,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2880,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:54,472 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:54,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:54,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1525997921, now seen corresponding path program 584 times [2021-06-12 20:02:54,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:54,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253287018] [2021-06-12 20:02:54,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:54,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:54,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:54,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:54,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253287018] [2021-06-12 20:02:54,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253287018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:54,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039445244] [2021-06-12 20:02:54,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:54,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:54,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:54,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:54,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:54,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:54,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:54,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:54,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:54,611 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 20:02:54,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:54,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:54,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:02:54,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:54,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:54,666 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:54,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:54,667 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:5 [2021-06-12 20:02:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:54,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039445244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:54,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:54,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:02:54,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141930457] [2021-06-12 20:02:54,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:02:54,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:54,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:02:54,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:54,675 INFO L87 Difference]: Start difference. First operand 488 states and 1539 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:54,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:54,840 INFO L93 Difference]: Finished difference Result 621 states and 1918 transitions. [2021-06-12 20:02:54,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:54,840 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:54,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:54,841 INFO L225 Difference]: With dead ends: 621 [2021-06-12 20:02:54,841 INFO L226 Difference]: Without dead ends: 588 [2021-06-12 20:02:54,841 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:54,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-12 20:02:54,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 490. [2021-06-12 20:02:54,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.1513292433537834) internal successors, (1541), 489 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:54,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1541 transitions. [2021-06-12 20:02:54,846 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1541 transitions. Word has length 21 [2021-06-12 20:02:54,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:54,846 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1541 transitions. [2021-06-12 20:02:54,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:54,846 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1541 transitions. [2021-06-12 20:02:54,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:54,847 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:54,847 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:55,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2884 [2021-06-12 20:02:55,047 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:55,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:55,047 INFO L82 PathProgramCache]: Analyzing trace with hash 98339847, now seen corresponding path program 585 times [2021-06-12 20:02:55,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:55,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088093181] [2021-06-12 20:02:55,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:55,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:55,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:55,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088093181] [2021-06-12 20:02:55,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088093181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:55,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320390208] [2021-06-12 20:02:55,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:55,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:02:55,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:55,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:55,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:55,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:55,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:55,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:55,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:55,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 20:02:55,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:55,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:55,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:02:55,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:55,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:55,237 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:55,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:55,237 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:02:55,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:55,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320390208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:55,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:55,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:02:55,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177470304] [2021-06-12 20:02:55,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:02:55,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:55,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:02:55,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:02:55,262 INFO L87 Difference]: Start difference. First operand 490 states and 1541 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:55,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:55,404 INFO L93 Difference]: Finished difference Result 615 states and 1900 transitions. [2021-06-12 20:02:55,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:55,404 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:55,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:55,405 INFO L225 Difference]: With dead ends: 615 [2021-06-12 20:02:55,405 INFO L226 Difference]: Without dead ends: 588 [2021-06-12 20:02:55,405 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:02:55,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-12 20:02:55,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 488. [2021-06-12 20:02:55,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.154004106776181) internal successors, (1536), 487 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:55,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1536 transitions. [2021-06-12 20:02:55,412 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1536 transitions. Word has length 21 [2021-06-12 20:02:55,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:55,412 INFO L482 AbstractCegarLoop]: Abstraction has 488 states and 1536 transitions. [2021-06-12 20:02:55,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:55,412 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1536 transitions. [2021-06-12 20:02:55,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:55,413 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:55,413 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:55,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2887,586 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:55,629 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:55,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:55,629 INFO L82 PathProgramCache]: Analyzing trace with hash 950479557, now seen corresponding path program 586 times [2021-06-12 20:02:55,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:55,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293573970] [2021-06-12 20:02:55,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:55,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:55,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293573970] [2021-06-12 20:02:55,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293573970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:55,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530792838] [2021-06-12 20:02:55,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:55,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:55,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:55,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:55,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:55,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:55,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:55,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:55,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:55,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:55,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:55,796 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:02:55,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:55,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:55,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:55,853 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:55,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:55,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:55,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:55,861 INFO L518 ElimStorePlain]: Eliminatee v_prenex_137 vanished before elimination [2021-06-12 20:02:55,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:55,862 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:15 [2021-06-12 20:02:55,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:55,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530792838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:55,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:55,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:02:55,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335410542] [2021-06-12 20:02:55,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:02:55,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:55,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:02:55,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:02:55,879 INFO L87 Difference]: Start difference. First operand 488 states and 1536 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:56,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:56,028 INFO L93 Difference]: Finished difference Result 661 states and 2050 transitions. [2021-06-12 20:02:56,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:56,028 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:56,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:56,029 INFO L225 Difference]: With dead ends: 661 [2021-06-12 20:02:56,029 INFO L226 Difference]: Without dead ends: 632 [2021-06-12 20:02:56,038 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:02:56,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-06-12 20:02:56,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 488. [2021-06-12 20:02:56,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.154004106776181) internal successors, (1536), 487 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:56,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1536 transitions. [2021-06-12 20:02:56,045 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1536 transitions. Word has length 21 [2021-06-12 20:02:56,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:56,046 INFO L482 AbstractCegarLoop]: Abstraction has 488 states and 1536 transitions. [2021-06-12 20:02:56,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:56,046 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1536 transitions. [2021-06-12 20:02:56,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:56,046 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:56,046 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:56,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2891,587 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:56,270 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:56,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:56,270 INFO L82 PathProgramCache]: Analyzing trace with hash -144219361, now seen corresponding path program 587 times [2021-06-12 20:02:56,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:56,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419221948] [2021-06-12 20:02:56,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:56,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:56,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:56,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419221948] [2021-06-12 20:02:56,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419221948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:56,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096189276] [2021-06-12 20:02:56,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:56,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:02:56,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:56,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:56,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:56,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:56,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:56,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:56,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:56,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:56,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:39 [2021-06-12 20:02:56,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:56,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:56,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:56,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:56,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:02:56,591 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:56,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:56,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:56,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:02:56,612 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:56,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:56,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:56,630 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:71, output treesize:19 [2021-06-12 20:02:56,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:56,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096189276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:56,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:56,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:56,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031683039] [2021-06-12 20:02:56,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:56,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:56,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:56,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:56,681 INFO L87 Difference]: Start difference. First operand 488 states and 1536 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:56,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:56,911 INFO L93 Difference]: Finished difference Result 836 states and 2559 transitions. [2021-06-12 20:02:56,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:02:56,912 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:56,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:56,913 INFO L225 Difference]: With dead ends: 836 [2021-06-12 20:02:56,913 INFO L226 Difference]: Without dead ends: 782 [2021-06-12 20:02:56,916 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 276.5ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:02:56,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-06-12 20:02:56,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 489. [2021-06-12 20:02:56,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 3.1741803278688523) internal successors, (1549), 488 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:56,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1549 transitions. [2021-06-12 20:02:56,930 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1549 transitions. Word has length 21 [2021-06-12 20:02:56,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:56,931 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1549 transitions. [2021-06-12 20:02:56,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:56,931 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1549 transitions. [2021-06-12 20:02:56,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:56,931 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:56,931 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:57,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2900,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:57,132 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:57,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:57,132 INFO L82 PathProgramCache]: Analyzing trace with hash -768505125, now seen corresponding path program 588 times [2021-06-12 20:02:57,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:57,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228639152] [2021-06-12 20:02:57,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:57,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:57,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:57,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:57,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228639152] [2021-06-12 20:02:57,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228639152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:57,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589024994] [2021-06-12 20:02:57,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:57,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:02:57,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:57,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:57,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:57,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:57,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:57,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:57,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:57,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:57,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:57,300 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:02:57,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:57,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:57,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:57,336 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:57,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:57,338 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:57,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:57,347 INFO L518 ElimStorePlain]: Eliminatee v_prenex_139 vanished before elimination [2021-06-12 20:02:57,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:57,347 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:21 [2021-06-12 20:02:57,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:57,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589024994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:57,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:57,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:02:57,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586007886] [2021-06-12 20:02:57,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:02:57,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:57,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:02:57,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:02:57,370 INFO L87 Difference]: Start difference. First operand 489 states and 1549 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:57,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:57,498 INFO L93 Difference]: Finished difference Result 665 states and 2066 transitions. [2021-06-12 20:02:57,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:57,498 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:57,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:57,499 INFO L225 Difference]: With dead ends: 665 [2021-06-12 20:02:57,499 INFO L226 Difference]: Without dead ends: 636 [2021-06-12 20:02:57,499 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:02:57,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-06-12 20:02:57,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 489. [2021-06-12 20:02:57,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 3.1741803278688523) internal successors, (1549), 488 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:57,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1549 transitions. [2021-06-12 20:02:57,504 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1549 transitions. Word has length 21 [2021-06-12 20:02:57,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:57,504 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1549 transitions. [2021-06-12 20:02:57,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:57,504 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1549 transitions. [2021-06-12 20:02:57,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:57,505 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:57,505 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:57,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2913,589 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:57,705 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:57,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:57,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1759833337, now seen corresponding path program 589 times [2021-06-12 20:02:57,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:57,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636854752] [2021-06-12 20:02:57,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:57,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:57,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:57,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:57,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636854752] [2021-06-12 20:02:57,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636854752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:57,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805659836] [2021-06-12 20:02:57,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:57,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:57,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:57,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:57,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:57,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:57,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:57,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:57,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:57,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:39 [2021-06-12 20:02:57,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:57,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:57,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:57,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:57,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:02:57,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:57,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:57,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:57,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:02:57,983 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:58,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:58,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:58,005 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:81, output treesize:19 [2021-06-12 20:02:58,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:58,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805659836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:58,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:58,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:58,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271705066] [2021-06-12 20:02:58,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:58,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:58,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:58,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:58,081 INFO L87 Difference]: Start difference. First operand 489 states and 1549 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:58,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:58,287 INFO L93 Difference]: Finished difference Result 739 states and 2271 transitions. [2021-06-12 20:02:58,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:02:58,287 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:58,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:58,288 INFO L225 Difference]: With dead ends: 739 [2021-06-12 20:02:58,288 INFO L226 Difference]: Without dead ends: 712 [2021-06-12 20:02:58,288 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 232.9ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:02:58,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-06-12 20:02:58,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 484. [2021-06-12 20:02:58,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.153209109730849) internal successors, (1523), 483 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:58,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1523 transitions. [2021-06-12 20:02:58,293 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1523 transitions. Word has length 21 [2021-06-12 20:02:58,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:58,294 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1523 transitions. [2021-06-12 20:02:58,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:58,294 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1523 transitions. [2021-06-12 20:02:58,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:58,294 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:58,294 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:58,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2919 [2021-06-12 20:02:58,495 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:58,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:58,495 INFO L82 PathProgramCache]: Analyzing trace with hash 627882053, now seen corresponding path program 590 times [2021-06-12 20:02:58,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:58,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61375748] [2021-06-12 20:02:58,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:58,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:58,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:58,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:58,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61375748] [2021-06-12 20:02:58,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61375748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:58,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563567358] [2021-06-12 20:02:58,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:58,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:58,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:58,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:58,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:58,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:58,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:58,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:58,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:58,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:58,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:58,711 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:02:58,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:58,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:58,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:58,773 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:58,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:58,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:02:58,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:58,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563567358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:58,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:58,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:02:58,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464372533] [2021-06-12 20:02:58,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:02:58,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:58,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:02:58,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:02:58,791 INFO L87 Difference]: Start difference. First operand 484 states and 1523 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:59,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:59,017 INFO L93 Difference]: Finished difference Result 632 states and 1957 transitions. [2021-06-12 20:02:59,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:59,018 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:59,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:59,019 INFO L225 Difference]: With dead ends: 632 [2021-06-12 20:02:59,019 INFO L226 Difference]: Without dead ends: 610 [2021-06-12 20:02:59,019 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 203.6ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:02:59,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-06-12 20:02:59,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 484. [2021-06-12 20:02:59,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.153209109730849) internal successors, (1523), 483 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:59,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1523 transitions. [2021-06-12 20:02:59,024 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1523 transitions. Word has length 21 [2021-06-12 20:02:59,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:59,024 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1523 transitions. [2021-06-12 20:02:59,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:59,024 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1523 transitions. [2021-06-12 20:02:59,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:59,024 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:59,024 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:59,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2929,591 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:59,225 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:59,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:59,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1617127597, now seen corresponding path program 591 times [2021-06-12 20:02:59,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:59,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101239924] [2021-06-12 20:02:59,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:59,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:59,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:59,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:59,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101239924] [2021-06-12 20:02:59,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101239924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:59,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537159941] [2021-06-12 20:02:59,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:59,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:02:59,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:59,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:59,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:59,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:59,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:59,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:59,385 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:59,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:59,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:59,395 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:02:59,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:02:59,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:59,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:59,431 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:59,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:59,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:59,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:59,442 INFO L518 ElimStorePlain]: Eliminatee v_prenex_141 vanished before elimination [2021-06-12 20:02:59,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:59,442 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:21 [2021-06-12 20:02:59,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:59,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537159941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:59,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:59,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:02:59,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180584558] [2021-06-12 20:02:59,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:02:59,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:59,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:02:59,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:02:59,465 INFO L87 Difference]: Start difference. First operand 484 states and 1523 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:59,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:59,610 INFO L93 Difference]: Finished difference Result 647 states and 2006 transitions. [2021-06-12 20:02:59,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:02:59,611 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:02:59,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:59,611 INFO L225 Difference]: With dead ends: 647 [2021-06-12 20:02:59,612 INFO L226 Difference]: Without dead ends: 618 [2021-06-12 20:02:59,612 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:02:59,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-06-12 20:02:59,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 484. [2021-06-12 20:02:59,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.153209109730849) internal successors, (1523), 483 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:59,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1523 transitions. [2021-06-12 20:02:59,621 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1523 transitions. Word has length 21 [2021-06-12 20:02:59,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:59,621 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1523 transitions. [2021-06-12 20:02:59,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:59,621 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1523 transitions. [2021-06-12 20:02:59,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:02:59,621 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:59,621 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:59,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 592 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2933 [2021-06-12 20:02:59,822 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:59,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:59,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1319861187, now seen corresponding path program 592 times [2021-06-12 20:02:59,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:59,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997485806] [2021-06-12 20:02:59,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:59,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:59,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:59,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997485806] [2021-06-12 20:02:59,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997485806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:59,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411726482] [2021-06-12 20:02:59,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:59,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:59,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:59,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:02:59,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:59,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:59,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:59,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:00,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:00,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:00,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 20:03:00,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:00,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:00,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:00,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:00,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:03:00,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:00,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:00,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:00,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:00,079 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:00,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:00,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:00,097 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:22 [2021-06-12 20:03:00,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:00,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411726482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:00,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:00,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:00,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948504551] [2021-06-12 20:03:00,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:00,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:00,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:00,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:00,171 INFO L87 Difference]: Start difference. First operand 484 states and 1523 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:00,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:00,966 INFO L93 Difference]: Finished difference Result 883 states and 2715 transitions. [2021-06-12 20:03:00,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:03:00,967 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:00,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:00,968 INFO L225 Difference]: With dead ends: 883 [2021-06-12 20:03:00,968 INFO L226 Difference]: Without dead ends: 860 [2021-06-12 20:03:00,968 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 559.0ms TimeCoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:03:00,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-06-12 20:03:00,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 483. [2021-06-12 20:03:00,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 3.1618257261410787) internal successors, (1524), 482 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:00,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1524 transitions. [2021-06-12 20:03:00,974 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1524 transitions. Word has length 21 [2021-06-12 20:03:00,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:00,974 INFO L482 AbstractCegarLoop]: Abstraction has 483 states and 1524 transitions. [2021-06-12 20:03:00,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:00,974 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1524 transitions. [2021-06-12 20:03:00,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:00,975 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:00,975 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:01,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2939,593 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:01,175 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:01,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:01,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1604123871, now seen corresponding path program 593 times [2021-06-12 20:03:01,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:01,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820946330] [2021-06-12 20:03:01,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:01,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:01,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820946330] [2021-06-12 20:03:01,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820946330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:01,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433046919] [2021-06-12 20:03:01,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:01,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:01,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:01,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:01,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:01,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:01,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:01,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:01,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:01,373 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:01,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:01,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:01,398 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:46 [2021-06-12 20:03:01,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:01,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:01,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:01,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:01,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:01,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:01,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:01,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:01,473 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:01,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:01,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:01,490 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:71, output treesize:19 [2021-06-12 20:03:01,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:01,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433046919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:01,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:01,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:01,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850626321] [2021-06-12 20:03:01,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:01,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:01,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:01,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:01,568 INFO L87 Difference]: Start difference. First operand 483 states and 1524 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:01,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:01,856 INFO L93 Difference]: Finished difference Result 714 states and 2190 transitions. [2021-06-12 20:03:01,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:03:01,856 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:01,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:01,857 INFO L225 Difference]: With dead ends: 714 [2021-06-12 20:03:01,857 INFO L226 Difference]: Without dead ends: 687 [2021-06-12 20:03:01,857 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 285.0ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:03:01,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-06-12 20:03:01,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 494. [2021-06-12 20:03:01,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 3.1643002028397564) internal successors, (1560), 493 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:01,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1560 transitions. [2021-06-12 20:03:01,863 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1560 transitions. Word has length 21 [2021-06-12 20:03:01,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:01,863 INFO L482 AbstractCegarLoop]: Abstraction has 494 states and 1560 transitions. [2021-06-12 20:03:01,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:01,863 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1560 transitions. [2021-06-12 20:03:01,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:01,863 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:01,864 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:02,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2948,594 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:02,064 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:02,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:02,064 INFO L82 PathProgramCache]: Analyzing trace with hash 471565919, now seen corresponding path program 594 times [2021-06-12 20:03:02,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:02,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307414242] [2021-06-12 20:03:02,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:02,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:02,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307414242] [2021-06-12 20:03:02,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307414242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:02,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908965106] [2021-06-12 20:03:02,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:02,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:03:02,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:02,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:02,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:02,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:02,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:02,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:02,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:02,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:02,260 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:02,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:02,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:02,279 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:46 [2021-06-12 20:03:02,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:02,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:02,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:02,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:02,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:02,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:02,353 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:02,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:02,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:02,362 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:10 [2021-06-12 20:03:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:02,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908965106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:02,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:02,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:02,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5946189] [2021-06-12 20:03:02,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:02,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:02,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:02,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:02,409 INFO L87 Difference]: Start difference. First operand 494 states and 1560 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:02,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:02,654 INFO L93 Difference]: Finished difference Result 663 states and 2046 transitions. [2021-06-12 20:03:02,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:02,655 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:02,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:02,656 INFO L225 Difference]: With dead ends: 663 [2021-06-12 20:03:02,656 INFO L226 Difference]: Without dead ends: 642 [2021-06-12 20:03:02,656 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 235.8ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:03:02,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-06-12 20:03:02,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 476. [2021-06-12 20:03:02,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.143157894736842) internal successors, (1493), 475 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:02,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1493 transitions. [2021-06-12 20:03:02,661 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1493 transitions. Word has length 21 [2021-06-12 20:03:02,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:02,661 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1493 transitions. [2021-06-12 20:03:02,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:02,661 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1493 transitions. [2021-06-12 20:03:02,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:02,662 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:02,662 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:02,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 595 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2961 [2021-06-12 20:03:02,862 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:02,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:02,862 INFO L82 PathProgramCache]: Analyzing trace with hash 13787909, now seen corresponding path program 595 times [2021-06-12 20:03:02,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:02,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115004070] [2021-06-12 20:03:02,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:02,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:02,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115004070] [2021-06-12 20:03:02,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115004070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:02,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25434567] [2021-06-12 20:03:02,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:02,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:02,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:02,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:02,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:02,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:02,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:02,971 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:02,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:02,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:02,977 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:03:02,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:02,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:03,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:03,002 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:03:03,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:03,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:03:03,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:03,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25434567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:03,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:03,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:03:03,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736743927] [2021-06-12 20:03:03,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:03:03,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:03,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:03:03,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:03:03,011 INFO L87 Difference]: Start difference. First operand 476 states and 1493 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:03,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:03,155 INFO L93 Difference]: Finished difference Result 741 states and 2254 transitions. [2021-06-12 20:03:03,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:03,155 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:03,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:03,156 INFO L225 Difference]: With dead ends: 741 [2021-06-12 20:03:03,156 INFO L226 Difference]: Without dead ends: 719 [2021-06-12 20:03:03,156 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:03:03,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-06-12 20:03:03,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 482. [2021-06-12 20:03:03,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.1434511434511436) internal successors, (1512), 481 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:03,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1512 transitions. [2021-06-12 20:03:03,162 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1512 transitions. Word has length 21 [2021-06-12 20:03:03,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:03,162 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1512 transitions. [2021-06-12 20:03:03,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:03,162 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1512 transitions. [2021-06-12 20:03:03,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:03,162 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:03,162 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:03,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2966,596 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:03,363 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:03,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:03,363 INFO L82 PathProgramCache]: Analyzing trace with hash -2076000913, now seen corresponding path program 596 times [2021-06-12 20:03:03,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:03,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220112231] [2021-06-12 20:03:03,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:03,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:03,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:03,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:03,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220112231] [2021-06-12 20:03:03,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220112231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:03,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820249898] [2021-06-12 20:03:03,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:03,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:03,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:03,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:03,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:03,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:03,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:03,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:03,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:03,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:03,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:03,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:03,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:03,525 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:29 [2021-06-12 20:03:03,640 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_4]} [2021-06-12 20:03:03,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:03,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:03,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:03,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:03,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:03,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:03,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:03,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:03,654 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:7 [2021-06-12 20:03:03,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:03,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820249898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:03,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:03,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:03,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768091220] [2021-06-12 20:03:03,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:03,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:03,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:03,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:03,681 INFO L87 Difference]: Start difference. First operand 482 states and 1512 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:04,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:04,209 INFO L93 Difference]: Finished difference Result 921 states and 2800 transitions. [2021-06-12 20:03:04,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:03:04,210 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:04,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:04,211 INFO L225 Difference]: With dead ends: 921 [2021-06-12 20:03:04,211 INFO L226 Difference]: Without dead ends: 902 [2021-06-12 20:03:04,211 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 446.3ms TimeCoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:03:04,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2021-06-12 20:03:04,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 487. [2021-06-12 20:03:04,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.1502057613168724) internal successors, (1531), 486 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:04,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1531 transitions. [2021-06-12 20:03:04,217 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1531 transitions. Word has length 21 [2021-06-12 20:03:04,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:04,218 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1531 transitions. [2021-06-12 20:03:04,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:04,218 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1531 transitions. [2021-06-12 20:03:04,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:04,218 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:04,218 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:04,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2969 [2021-06-12 20:03:04,419 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:04,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:04,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1119235791, now seen corresponding path program 597 times [2021-06-12 20:03:04,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:04,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203277099] [2021-06-12 20:03:04,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:04,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:04,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:04,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:04,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203277099] [2021-06-12 20:03:04,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203277099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:04,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805550727] [2021-06-12 20:03:04,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:04,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:03:04,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:04,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:04,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:04,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:04,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:04,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 20:03:04,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:04,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:03:04,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:04,606 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:03:04,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:04,606 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:5 [2021-06-12 20:03:04,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:04,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805550727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:04,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:04,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:03:04,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602054192] [2021-06-12 20:03:04,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:03:04,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:04,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:03:04,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:04,632 INFO L87 Difference]: Start difference. First operand 487 states and 1531 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:04,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:04,886 INFO L93 Difference]: Finished difference Result 818 states and 2508 transitions. [2021-06-12 20:03:04,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:03:04,886 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:04,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:04,887 INFO L225 Difference]: With dead ends: 818 [2021-06-12 20:03:04,887 INFO L226 Difference]: Without dead ends: 779 [2021-06-12 20:03:04,887 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 202.0ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:03:04,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-06-12 20:03:04,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 487. [2021-06-12 20:03:04,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.139917695473251) internal successors, (1526), 486 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:04,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1526 transitions. [2021-06-12 20:03:04,893 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1526 transitions. Word has length 21 [2021-06-12 20:03:04,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:04,893 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1526 transitions. [2021-06-12 20:03:04,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:04,893 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1526 transitions. [2021-06-12 20:03:04,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:04,894 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:04,894 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:05,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2976,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:05,094 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:05,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:05,094 INFO L82 PathProgramCache]: Analyzing trace with hash 276266191, now seen corresponding path program 598 times [2021-06-12 20:03:05,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:05,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046951779] [2021-06-12 20:03:05,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:05,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:05,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:05,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046951779] [2021-06-12 20:03:05,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046951779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:05,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219754711] [2021-06-12 20:03:05,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:05,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:05,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:05,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:05,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:05,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:05,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:05,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:05,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:05,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:05,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:05,231 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:03:05,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:05,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:05,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:05,295 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:03:05,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:05,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:03:05,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:05,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219754711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:05,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:05,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:03:05,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538751184] [2021-06-12 20:03:05,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:03:05,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:05,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:03:05,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:05,320 INFO L87 Difference]: Start difference. First operand 487 states and 1526 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:05,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:05,722 INFO L93 Difference]: Finished difference Result 906 states and 2775 transitions. [2021-06-12 20:03:05,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:03:05,723 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:05,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:05,724 INFO L225 Difference]: With dead ends: 906 [2021-06-12 20:03:05,724 INFO L226 Difference]: Without dead ends: 887 [2021-06-12 20:03:05,724 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 303.0ms TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:03:05,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2021-06-12 20:03:05,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 493. [2021-06-12 20:03:05,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.1463414634146343) internal successors, (1548), 492 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:05,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1548 transitions. [2021-06-12 20:03:05,735 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1548 transitions. Word has length 21 [2021-06-12 20:03:05,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:05,735 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1548 transitions. [2021-06-12 20:03:05,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:05,736 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1548 transitions. [2021-06-12 20:03:05,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:05,736 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:05,736 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:05,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2979,599 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:05,937 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:05,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:05,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1962658031, now seen corresponding path program 599 times [2021-06-12 20:03:05,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:05,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676880148] [2021-06-12 20:03:05,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:06,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:06,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676880148] [2021-06-12 20:03:06,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676880148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:06,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284217089] [2021-06-12 20:03:06,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:06,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:03:06,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:06,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:03:06,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:06,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:06,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:06,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:06,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:06,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:06,076 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:06,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:06,079 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:06,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:06,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:06,101 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:89, output treesize:57 [2021-06-12 20:03:06,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:06,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:06,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 20:03:06,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:06,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:06,187 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:06,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:06,198 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:03:06,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:06,199 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:69, output treesize:26 [2021-06-12 20:03:06,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:06,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284217089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:06,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:06,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:03:06,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769622803] [2021-06-12 20:03:06,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:03:06,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:06,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:03:06,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:06,269 INFO L87 Difference]: Start difference. First operand 493 states and 1548 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:07,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:07,330 INFO L93 Difference]: Finished difference Result 1112 states and 3401 transitions. [2021-06-12 20:03:07,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:03:07,330 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:07,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:07,332 INFO L225 Difference]: With dead ends: 1112 [2021-06-12 20:03:07,332 INFO L226 Difference]: Without dead ends: 1066 [2021-06-12 20:03:07,332 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 794.7ms TimeCoverageRelationStatistics Valid=208, Invalid=982, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:03:07,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-06-12 20:03:07,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 499. [2021-06-12 20:03:07,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 3.1646586345381524) internal successors, (1576), 498 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:07,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1576 transitions. [2021-06-12 20:03:07,343 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1576 transitions. Word has length 21 [2021-06-12 20:03:07,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:07,343 INFO L482 AbstractCegarLoop]: Abstraction has 499 states and 1576 transitions. [2021-06-12 20:03:07,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:07,343 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1576 transitions. [2021-06-12 20:03:07,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:07,344 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:07,344 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:07,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2985 [2021-06-12 20:03:07,545 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:07,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:07,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1668348405, now seen corresponding path program 600 times [2021-06-12 20:03:07,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:07,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35959322] [2021-06-12 20:03:07,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:07,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:07,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:07,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:07,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35959322] [2021-06-12 20:03:07,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35959322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:07,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125692423] [2021-06-12 20:03:07,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:07,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:03:07,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:07,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:07,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:07,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:07,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:07,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:07,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:07,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:07,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:07,671 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:03:07,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:07,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:07,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:07,697 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:03:07,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:07,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:03:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:07,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125692423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:07,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:07,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:03:07,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825878634] [2021-06-12 20:03:07,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:03:07,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:07,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:03:07,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:03:07,707 INFO L87 Difference]: Start difference. First operand 499 states and 1576 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:07,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:07,824 INFO L93 Difference]: Finished difference Result 764 states and 2361 transitions. [2021-06-12 20:03:07,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:07,824 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:07,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:07,825 INFO L225 Difference]: With dead ends: 764 [2021-06-12 20:03:07,825 INFO L226 Difference]: Without dead ends: 742 [2021-06-12 20:03:07,825 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:03:07,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-06-12 20:03:07,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 502. [2021-06-12 20:03:07,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.161676646706587) internal successors, (1584), 501 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:07,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1584 transitions. [2021-06-12 20:03:07,832 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1584 transitions. Word has length 21 [2021-06-12 20:03:07,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:07,832 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 1584 transitions. [2021-06-12 20:03:07,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:07,832 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1584 transitions. [2021-06-12 20:03:07,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:07,833 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:07,833 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:08,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 601 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2994 [2021-06-12 20:03:08,033 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:08,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:08,033 INFO L82 PathProgramCache]: Analyzing trace with hash 212404533, now seen corresponding path program 601 times [2021-06-12 20:03:08,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:08,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569907728] [2021-06-12 20:03:08,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:08,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:08,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:08,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569907728] [2021-06-12 20:03:08,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569907728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:08,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258793249] [2021-06-12 20:03:08,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:08,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:08,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:08,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:08,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:08,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:08,154 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:08,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:08,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:08,161 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:03:08,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:08,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:08,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:08,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:08,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:08,191 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:03:08,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:08,191 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-12 20:03:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:08,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258793249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:08,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:08,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:03:08,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573000039] [2021-06-12 20:03:08,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:03:08,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:08,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:03:08,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:03:08,208 INFO L87 Difference]: Start difference. First operand 502 states and 1584 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:08,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:08,396 INFO L93 Difference]: Finished difference Result 765 states and 2356 transitions. [2021-06-12 20:03:08,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:08,396 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:08,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:08,397 INFO L225 Difference]: With dead ends: 765 [2021-06-12 20:03:08,397 INFO L226 Difference]: Without dead ends: 736 [2021-06-12 20:03:08,397 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:03:08,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-06-12 20:03:08,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 493. [2021-06-12 20:03:08,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.154471544715447) internal successors, (1552), 492 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:08,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1552 transitions. [2021-06-12 20:03:08,403 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1552 transitions. Word has length 21 [2021-06-12 20:03:08,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:08,403 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1552 transitions. [2021-06-12 20:03:08,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:08,403 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1552 transitions. [2021-06-12 20:03:08,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:08,404 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:08,404 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:08,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2998,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:08,604 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:08,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:08,604 INFO L82 PathProgramCache]: Analyzing trace with hash 838275325, now seen corresponding path program 602 times [2021-06-12 20:03:08,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:08,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489435463] [2021-06-12 20:03:08,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:08,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:08,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:08,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489435463] [2021-06-12 20:03:08,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489435463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:08,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771568041] [2021-06-12 20:03:08,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:08,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:08,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:08,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:08,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:08,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:08,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:08,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:08,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:08,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 20:03:08,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:08,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:08,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:08,780 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:03:08,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:08,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:03:08,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:08,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771568041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:08,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:08,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:03:08,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345329725] [2021-06-12 20:03:08,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:03:08,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:08,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:03:08,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:08,804 INFO L87 Difference]: Start difference. First operand 493 states and 1552 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:09,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:09,409 INFO L93 Difference]: Finished difference Result 895 states and 2732 transitions. [2021-06-12 20:03:09,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:03:09,409 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:09,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:09,410 INFO L225 Difference]: With dead ends: 895 [2021-06-12 20:03:09,410 INFO L226 Difference]: Without dead ends: 872 [2021-06-12 20:03:09,410 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 469.6ms TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:03:09,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-06-12 20:03:09,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 483. [2021-06-12 20:03:09,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 3.136929460580913) internal successors, (1512), 482 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:09,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1512 transitions. [2021-06-12 20:03:09,416 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1512 transitions. Word has length 21 [2021-06-12 20:03:09,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:09,416 INFO L482 AbstractCegarLoop]: Abstraction has 483 states and 1512 transitions. [2021-06-12 20:03:09,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:09,417 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1512 transitions. [2021-06-12 20:03:09,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:09,417 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:09,417 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:09,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3003,603 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:09,618 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:09,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:09,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1036891949, now seen corresponding path program 603 times [2021-06-12 20:03:09,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:09,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664311929] [2021-06-12 20:03:09,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:09,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:09,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:09,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664311929] [2021-06-12 20:03:09,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664311929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:09,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856229976] [2021-06-12 20:03:09,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:09,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:03:09,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:09,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:09,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:09,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:09,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:09,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:09,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:09,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 20:03:09,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:09,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:09,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:09,781 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:03:09,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:09,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:03:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:09,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856229976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:09,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:09,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:03:09,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553431418] [2021-06-12 20:03:09,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:03:09,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:09,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:03:09,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:03:09,794 INFO L87 Difference]: Start difference. First operand 483 states and 1512 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:09,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:09,896 INFO L93 Difference]: Finished difference Result 611 states and 1882 transitions. [2021-06-12 20:03:09,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:09,896 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:09,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:09,897 INFO L225 Difference]: With dead ends: 611 [2021-06-12 20:03:09,897 INFO L226 Difference]: Without dead ends: 592 [2021-06-12 20:03:09,897 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:03:09,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-12 20:03:09,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 479. [2021-06-12 20:03:09,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.1380753138075312) internal successors, (1500), 478 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:09,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1500 transitions. [2021-06-12 20:03:09,902 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1500 transitions. Word has length 21 [2021-06-12 20:03:09,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:09,902 INFO L482 AbstractCegarLoop]: Abstraction has 479 states and 1500 transitions. [2021-06-12 20:03:09,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:09,902 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1500 transitions. [2021-06-12 20:03:09,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:09,903 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:09,903 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:10,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3005,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:10,103 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:10,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:10,104 INFO L82 PathProgramCache]: Analyzing trace with hash 2145041413, now seen corresponding path program 604 times [2021-06-12 20:03:10,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:10,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431819362] [2021-06-12 20:03:10,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:10,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:10,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:10,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431819362] [2021-06-12 20:03:10,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431819362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:10,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799240136] [2021-06-12 20:03:10,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:10,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:10,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:10,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:10,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:10,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:10,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:10,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:10,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:10,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:10,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:10,238 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:03:10,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:10,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:10,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:10,258 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:03:10,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:10,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:03:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:10,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799240136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:10,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:10,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:03:10,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62532830] [2021-06-12 20:03:10,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:03:10,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:10,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:03:10,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:03:10,267 INFO L87 Difference]: Start difference. First operand 479 states and 1500 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:10,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:10,369 INFO L93 Difference]: Finished difference Result 601 states and 1854 transitions. [2021-06-12 20:03:10,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:10,369 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:10,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:10,370 INFO L225 Difference]: With dead ends: 601 [2021-06-12 20:03:10,370 INFO L226 Difference]: Without dead ends: 579 [2021-06-12 20:03:10,370 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:03:10,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-12 20:03:10,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 486. [2021-06-12 20:03:10,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.1402061855670103) internal successors, (1523), 485 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:10,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1523 transitions. [2021-06-12 20:03:10,375 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1523 transitions. Word has length 21 [2021-06-12 20:03:10,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:10,375 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1523 transitions. [2021-06-12 20:03:10,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:10,375 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1523 transitions. [2021-06-12 20:03:10,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:10,376 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:10,376 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:10,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3007,605 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:10,576 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:10,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:10,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1725853973, now seen corresponding path program 605 times [2021-06-12 20:03:10,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:10,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147035250] [2021-06-12 20:03:10,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:10,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:10,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:10,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:10,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147035250] [2021-06-12 20:03:10,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147035250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:10,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911856511] [2021-06-12 20:03:10,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:10,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:10,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:10,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:10,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:10,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:10,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:10,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:10,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:10,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 20:03:10,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:10,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:10,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:03:10,746 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:10,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:10,749 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:03:10,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:10,749 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:5 [2021-06-12 20:03:10,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:10,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911856511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:10,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:10,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:03:10,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087858620] [2021-06-12 20:03:10,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:03:10,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:10,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:03:10,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:03:10,757 INFO L87 Difference]: Start difference. First operand 486 states and 1523 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:10,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:10,916 INFO L93 Difference]: Finished difference Result 614 states and 1892 transitions. [2021-06-12 20:03:10,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:10,916 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:10,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:10,917 INFO L225 Difference]: With dead ends: 614 [2021-06-12 20:03:10,917 INFO L226 Difference]: Without dead ends: 581 [2021-06-12 20:03:10,917 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:10,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-06-12 20:03:10,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 486. [2021-06-12 20:03:10,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.134020618556701) internal successors, (1520), 485 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:10,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1520 transitions. [2021-06-12 20:03:10,922 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1520 transitions. Word has length 21 [2021-06-12 20:03:10,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:10,922 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1520 transitions. [2021-06-12 20:03:10,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:10,922 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1520 transitions. [2021-06-12 20:03:10,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:10,923 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:10,923 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:11,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 606 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3010 [2021-06-12 20:03:11,123 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:11,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:11,124 INFO L82 PathProgramCache]: Analyzing trace with hash -269172945, now seen corresponding path program 606 times [2021-06-12 20:03:11,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:11,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719632349] [2021-06-12 20:03:11,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:11,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:11,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:11,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719632349] [2021-06-12 20:03:11,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719632349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:11,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264814724] [2021-06-12 20:03:11,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:11,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:03:11,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:11,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:11,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:11,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:11,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:11,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:11,258 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:11,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:11,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:11,265 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:03:11,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:11,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:11,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:11,278 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:11,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:11,284 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:03:11,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:11,284 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-12 20:03:11,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:11,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264814724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:11,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:11,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:03:11,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003353362] [2021-06-12 20:03:11,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:03:11,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:11,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:03:11,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:03:11,300 INFO L87 Difference]: Start difference. First operand 486 states and 1520 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:11,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:11,438 INFO L93 Difference]: Finished difference Result 641 states and 1983 transitions. [2021-06-12 20:03:11,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:11,440 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:11,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:11,441 INFO L225 Difference]: With dead ends: 641 [2021-06-12 20:03:11,441 INFO L226 Difference]: Without dead ends: 612 [2021-06-12 20:03:11,441 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:03:11,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-12 20:03:11,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 486. [2021-06-12 20:03:11,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.134020618556701) internal successors, (1520), 485 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:11,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1520 transitions. [2021-06-12 20:03:11,446 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1520 transitions. Word has length 21 [2021-06-12 20:03:11,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:11,446 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1520 transitions. [2021-06-12 20:03:11,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:11,446 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1520 transitions. [2021-06-12 20:03:11,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:11,447 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:11,447 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:11,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3013,607 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:11,666 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:11,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:11,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1363871863, now seen corresponding path program 607 times [2021-06-12 20:03:11,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:11,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014605819] [2021-06-12 20:03:11,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:11,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:11,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:11,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014605819] [2021-06-12 20:03:11,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014605819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:11,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921086852] [2021-06-12 20:03:11,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:11,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:11,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:11,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:11,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:11,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:11,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:11,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 20:03:11,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:11,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:11,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:03:11,819 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:11,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:11,825 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:03:11,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:11,825 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:03:11,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:11,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921086852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:11,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:11,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:03:11,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896435254] [2021-06-12 20:03:11,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:03:11,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:11,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:03:11,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:03:11,852 INFO L87 Difference]: Start difference. First operand 486 states and 1520 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:12,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:12,016 INFO L93 Difference]: Finished difference Result 601 states and 1858 transitions. [2021-06-12 20:03:12,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:12,016 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:12,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:12,017 INFO L225 Difference]: With dead ends: 601 [2021-06-12 20:03:12,017 INFO L226 Difference]: Without dead ends: 574 [2021-06-12 20:03:12,017 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:12,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-06-12 20:03:12,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 483. [2021-06-12 20:03:12,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 3.136929460580913) internal successors, (1512), 482 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:12,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1512 transitions. [2021-06-12 20:03:12,022 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1512 transitions. Word has length 21 [2021-06-12 20:03:12,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:12,022 INFO L482 AbstractCegarLoop]: Abstraction has 483 states and 1512 transitions. [2021-06-12 20:03:12,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:12,022 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1512 transitions. [2021-06-12 20:03:12,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:12,023 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:12,023 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:12,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3017,608 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:12,223 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:12,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:12,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1837611175, now seen corresponding path program 608 times [2021-06-12 20:03:12,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:12,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630975928] [2021-06-12 20:03:12,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:12,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:12,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630975928] [2021-06-12 20:03:12,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630975928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:12,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603738113] [2021-06-12 20:03:12,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:12,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:12,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:12,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:12,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:12,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:12,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:12,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-06-12 20:03:12,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:03:12,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:03:12,376 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:12,382 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:03:12,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:12,383 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-12 20:03:12,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:12,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603738113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:12,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:12,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:03:12,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357797498] [2021-06-12 20:03:12,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:03:12,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:12,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:03:12,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:03:12,399 INFO L87 Difference]: Start difference. First operand 483 states and 1512 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:12,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:12,533 INFO L93 Difference]: Finished difference Result 615 states and 1894 transitions. [2021-06-12 20:03:12,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:12,533 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:12,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:12,534 INFO L225 Difference]: With dead ends: 615 [2021-06-12 20:03:12,534 INFO L226 Difference]: Without dead ends: 579 [2021-06-12 20:03:12,534 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:03:12,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-12 20:03:12,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 486. [2021-06-12 20:03:12,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.138144329896907) internal successors, (1522), 485 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:12,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1522 transitions. [2021-06-12 20:03:12,539 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1522 transitions. Word has length 21 [2021-06-12 20:03:12,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:12,539 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1522 transitions. [2021-06-12 20:03:12,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:12,539 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1522 transitions. [2021-06-12 20:03:12,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:12,540 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:12,540 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:12,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3023 [2021-06-12 20:03:12,740 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:12,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:12,740 INFO L82 PathProgramCache]: Analyzing trace with hash 742912257, now seen corresponding path program 609 times [2021-06-12 20:03:12,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:12,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230146411] [2021-06-12 20:03:12,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:12,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:12,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230146411] [2021-06-12 20:03:12,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230146411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:12,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983036314] [2021-06-12 20:03:12,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:12,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:03:12,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:12,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:12,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:12,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:12,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:12,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:12,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:12,884 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:03:12,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:12,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:12,914 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:03:12,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:12,916 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:12,922 INFO L518 ElimStorePlain]: Eliminatee v_prenex_143 vanished before elimination [2021-06-12 20:03:12,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:12,923 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:13 [2021-06-12 20:03:12,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:12,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983036314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:12,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:12,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:03:12,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826112502] [2021-06-12 20:03:12,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:03:12,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:12,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:03:12,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:03:12,951 INFO L87 Difference]: Start difference. First operand 486 states and 1522 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:13,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:13,150 INFO L93 Difference]: Finished difference Result 656 states and 2011 transitions. [2021-06-12 20:03:13,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:13,150 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:13,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:13,151 INFO L225 Difference]: With dead ends: 656 [2021-06-12 20:03:13,151 INFO L226 Difference]: Without dead ends: 629 [2021-06-12 20:03:13,151 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 155.2ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:13,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-12 20:03:13,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 502. [2021-06-12 20:03:13,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.1397205588822357) internal successors, (1573), 501 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:13,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1573 transitions. [2021-06-12 20:03:13,157 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1573 transitions. Word has length 21 [2021-06-12 20:03:13,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:13,157 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 1573 transitions. [2021-06-12 20:03:13,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:13,157 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1573 transitions. [2021-06-12 20:03:13,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:13,157 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:13,157 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:13,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3026,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:13,358 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:13,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:13,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1671302101, now seen corresponding path program 610 times [2021-06-12 20:03:13,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:13,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479875333] [2021-06-12 20:03:13,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:13,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:13,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479875333] [2021-06-12 20:03:13,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479875333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:13,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491741566] [2021-06-12 20:03:13,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:13,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:13,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:13,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:13,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:13,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:13,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:13,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:13,493 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:13,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:13,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:13,499 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:03:13,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:13,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:13,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:13,533 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:03:13,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:13,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:03:13,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:13,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491741566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:13,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:13,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:03:13,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916062387] [2021-06-12 20:03:13,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:03:13,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:13,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:03:13,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:03:13,544 INFO L87 Difference]: Start difference. First operand 502 states and 1573 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:13,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:13,713 INFO L93 Difference]: Finished difference Result 606 states and 1858 transitions. [2021-06-12 20:03:13,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:13,713 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:13,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:13,714 INFO L225 Difference]: With dead ends: 606 [2021-06-12 20:03:13,714 INFO L226 Difference]: Without dead ends: 585 [2021-06-12 20:03:13,714 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 137.1ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:13,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-12 20:03:13,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 483. [2021-06-12 20:03:13,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 3.1493775933609958) internal successors, (1518), 482 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:13,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1518 transitions. [2021-06-12 20:03:13,719 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1518 transitions. Word has length 21 [2021-06-12 20:03:13,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:13,719 INFO L482 AbstractCegarLoop]: Abstraction has 483 states and 1518 transitions. [2021-06-12 20:03:13,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:13,719 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1518 transitions. [2021-06-12 20:03:13,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:13,719 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:13,719 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:13,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 611 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3034 [2021-06-12 20:03:13,920 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:13,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:13,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1889309011, now seen corresponding path program 611 times [2021-06-12 20:03:13,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:13,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979509701] [2021-06-12 20:03:13,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:13,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:13,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979509701] [2021-06-12 20:03:13,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979509701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:13,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216159725] [2021-06-12 20:03:13,996 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:14,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:03:14,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:14,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:14,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:14,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:14,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:14,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:14,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:14,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:14,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:14,074 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:03:14,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:14,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:14,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:14,133 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:03:14,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:14,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:03:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:14,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216159725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:14,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:14,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:03:14,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67530278] [2021-06-12 20:03:14,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:03:14,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:14,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:03:14,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:14,142 INFO L87 Difference]: Start difference. First operand 483 states and 1518 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:14,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:14,298 INFO L93 Difference]: Finished difference Result 634 states and 1951 transitions. [2021-06-12 20:03:14,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:14,298 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:14,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:14,299 INFO L225 Difference]: With dead ends: 634 [2021-06-12 20:03:14,299 INFO L226 Difference]: Without dead ends: 612 [2021-06-12 20:03:14,299 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:14,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-12 20:03:14,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 490. [2021-06-12 20:03:14,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.1615541922290387) internal successors, (1546), 489 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:14,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1546 transitions. [2021-06-12 20:03:14,305 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1546 transitions. Word has length 21 [2021-06-12 20:03:14,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:14,305 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1546 transitions. [2021-06-12 20:03:14,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:14,305 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1546 transitions. [2021-06-12 20:03:14,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:14,305 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:14,305 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:14,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3037 [2021-06-12 20:03:14,506 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:14,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:14,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1903866949, now seen corresponding path program 612 times [2021-06-12 20:03:14,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:14,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262945042] [2021-06-12 20:03:14,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:14,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:14,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262945042] [2021-06-12 20:03:14,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262945042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:14,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606542208] [2021-06-12 20:03:14,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:14,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:03:14,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:14,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:14,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:14,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:14,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:14,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:14,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:14,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:14,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:14,663 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:03:14,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:14,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:14,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:14,703 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:03:14,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:14,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:03:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:14,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606542208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:14,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:14,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:03:14,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614716404] [2021-06-12 20:03:14,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:03:14,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:14,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:03:14,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:03:14,717 INFO L87 Difference]: Start difference. First operand 490 states and 1546 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:14,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:14,863 INFO L93 Difference]: Finished difference Result 625 states and 1927 transitions. [2021-06-12 20:03:14,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:14,864 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:14,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:14,865 INFO L225 Difference]: With dead ends: 625 [2021-06-12 20:03:14,865 INFO L226 Difference]: Without dead ends: 603 [2021-06-12 20:03:14,865 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 114.2ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:03:14,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-06-12 20:03:14,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 487. [2021-06-12 20:03:14,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.156378600823045) internal successors, (1534), 486 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:14,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1534 transitions. [2021-06-12 20:03:14,870 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1534 transitions. Word has length 21 [2021-06-12 20:03:14,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:14,870 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1534 transitions. [2021-06-12 20:03:14,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:14,870 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1534 transitions. [2021-06-12 20:03:14,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:14,871 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:14,871 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:15,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 613 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3040 [2021-06-12 20:03:15,071 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:15,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:15,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1263984893, now seen corresponding path program 613 times [2021-06-12 20:03:15,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:15,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181717737] [2021-06-12 20:03:15,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:15,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:15,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:15,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181717737] [2021-06-12 20:03:15,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181717737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:15,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803636883] [2021-06-12 20:03:15,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:15,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:15,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:15,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:15,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:15,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:15,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:15,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:15,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:15,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:15,313 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:62, output treesize:38 [2021-06-12 20:03:15,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:15,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:15,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:15,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:15,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:15,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:15,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:15,481 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:33, output treesize:7 [2021-06-12 20:03:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:15,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803636883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:15,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:15,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:15,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451949913] [2021-06-12 20:03:15,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:15,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:15,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:15,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:15,510 INFO L87 Difference]: Start difference. First operand 487 states and 1534 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:15,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:15,831 INFO L93 Difference]: Finished difference Result 773 states and 2384 transitions. [2021-06-12 20:03:15,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:03:15,831 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:15,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:15,832 INFO L225 Difference]: With dead ends: 773 [2021-06-12 20:03:15,832 INFO L226 Difference]: Without dead ends: 754 [2021-06-12 20:03:15,832 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 294.8ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:03:15,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-06-12 20:03:15,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 493. [2021-06-12 20:03:15,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.1646341463414633) internal successors, (1557), 492 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:15,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1557 transitions. [2021-06-12 20:03:15,838 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1557 transitions. Word has length 21 [2021-06-12 20:03:15,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:15,838 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1557 transitions. [2021-06-12 20:03:15,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:15,839 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1557 transitions. [2021-06-12 20:03:15,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:15,839 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:15,839 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:16,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3043,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:16,040 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:16,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:16,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1486193505, now seen corresponding path program 614 times [2021-06-12 20:03:16,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:16,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930125149] [2021-06-12 20:03:16,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:16,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:16,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:16,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:16,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930125149] [2021-06-12 20:03:16,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930125149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:16,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115434198] [2021-06-12 20:03:16,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:16,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:16,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:16,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:16,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:16,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:16,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:16,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:16,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:16,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 20:03:16,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:16,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:16,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:03:16,254 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:16,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:16,256 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:03:16,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:16,257 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:5 [2021-06-12 20:03:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:16,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115434198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:16,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:16,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:03:16,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108730663] [2021-06-12 20:03:16,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:03:16,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:16,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:03:16,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:16,282 INFO L87 Difference]: Start difference. First operand 493 states and 1557 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:16,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:16,440 INFO L93 Difference]: Finished difference Result 826 states and 2520 transitions. [2021-06-12 20:03:16,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:03:16,440 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:16,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:16,441 INFO L225 Difference]: With dead ends: 826 [2021-06-12 20:03:16,441 INFO L226 Difference]: Without dead ends: 766 [2021-06-12 20:03:16,441 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 169.6ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:03:16,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-06-12 20:03:16,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 493. [2021-06-12 20:03:16,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.154471544715447) internal successors, (1552), 492 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:16,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1552 transitions. [2021-06-12 20:03:16,447 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1552 transitions. Word has length 21 [2021-06-12 20:03:16,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:16,447 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1552 transitions. [2021-06-12 20:03:16,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:16,447 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1552 transitions. [2021-06-12 20:03:16,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:16,448 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:16,448 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:16,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3060 [2021-06-12 20:03:16,648 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:16,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:16,648 INFO L82 PathProgramCache]: Analyzing trace with hash 422406947, now seen corresponding path program 615 times [2021-06-12 20:03:16,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:16,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416734311] [2021-06-12 20:03:16,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:16,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:16,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:16,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416734311] [2021-06-12 20:03:16,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416734311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:16,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663169232] [2021-06-12 20:03:16,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:16,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:03:16,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:16,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:16,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:16,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:16,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:16,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:16,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:16,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:16,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:16,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:16,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:16,890 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:41 [2021-06-12 20:03:17,045 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_146, v_prenex_147], 1=[o_2, o_4]} [2021-06-12 20:03:17,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:17,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:17,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:17,061 INFO L518 ElimStorePlain]: Eliminatee v_prenex_147 vanished before elimination [2021-06-12 20:03:17,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:17,064 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:17,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:17,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:17,078 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:17,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:17,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:17,090 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:51, output treesize:13 [2021-06-12 20:03:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:17,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663169232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:17,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:17,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:17,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414325520] [2021-06-12 20:03:17,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:17,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:17,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:17,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:17,138 INFO L87 Difference]: Start difference. First operand 493 states and 1552 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:17,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:17,474 INFO L93 Difference]: Finished difference Result 799 states and 2474 transitions. [2021-06-12 20:03:17,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:03:17,474 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:17,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:17,475 INFO L225 Difference]: With dead ends: 799 [2021-06-12 20:03:17,475 INFO L226 Difference]: Without dead ends: 776 [2021-06-12 20:03:17,475 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 269.2ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:03:17,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2021-06-12 20:03:17,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 491. [2021-06-12 20:03:17,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.157142857142857) internal successors, (1547), 490 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:17,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1547 transitions. [2021-06-12 20:03:17,481 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1547 transitions. Word has length 21 [2021-06-12 20:03:17,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:17,482 INFO L482 AbstractCegarLoop]: Abstraction has 491 states and 1547 transitions. [2021-06-12 20:03:17,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:17,482 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1547 transitions. [2021-06-12 20:03:17,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:17,482 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:17,482 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:17,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3063,616 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:17,683 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:17,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:17,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1575721435, now seen corresponding path program 616 times [2021-06-12 20:03:17,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:17,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758600228] [2021-06-12 20:03:17,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:17,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:17,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758600228] [2021-06-12 20:03:17,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758600228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:17,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637143607] [2021-06-12 20:03:17,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:17,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:17,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:17,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:17,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:17,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:17,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:17,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:17,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:17,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:17,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:17,932 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:62, output treesize:38 [2021-06-12 20:03:18,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:18,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:18,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:18,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:18,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:18,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:18,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:18,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:18,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:18,053 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:10 [2021-06-12 20:03:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:18,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637143607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:18,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:18,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:18,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29704011] [2021-06-12 20:03:18,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:18,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:18,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:18,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:18,109 INFO L87 Difference]: Start difference. First operand 491 states and 1547 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:18,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:18,372 INFO L93 Difference]: Finished difference Result 765 states and 2359 transitions. [2021-06-12 20:03:18,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:03:18,372 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:18,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:18,373 INFO L225 Difference]: With dead ends: 765 [2021-06-12 20:03:18,373 INFO L226 Difference]: Without dead ends: 746 [2021-06-12 20:03:18,373 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 272.8ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:03:18,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2021-06-12 20:03:18,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 487. [2021-06-12 20:03:18,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.1502057613168724) internal successors, (1531), 486 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:18,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1531 transitions. [2021-06-12 20:03:18,379 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1531 transitions. Word has length 21 [2021-06-12 20:03:18,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:18,380 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1531 transitions. [2021-06-12 20:03:18,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:18,380 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1531 transitions. [2021-06-12 20:03:18,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:18,380 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:18,380 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:18,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 617 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3089 [2021-06-12 20:03:18,581 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:18,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:18,581 INFO L82 PathProgramCache]: Analyzing trace with hash 990283973, now seen corresponding path program 617 times [2021-06-12 20:03:18,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:18,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402565249] [2021-06-12 20:03:18,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:18,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:18,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402565249] [2021-06-12 20:03:18,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402565249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:18,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969160496] [2021-06-12 20:03:18,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:18,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:03:18,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:18,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:18,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:18,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:18,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:18,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:18,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:18,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:18,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:18,738 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:03:18,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:18,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:18,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:18,795 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:03:18,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:18,797 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:18,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:18,803 INFO L518 ElimStorePlain]: Eliminatee v_prenex_149 vanished before elimination [2021-06-12 20:03:18,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:18,803 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:15 [2021-06-12 20:03:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:18,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969160496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:18,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:18,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:03:18,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760537423] [2021-06-12 20:03:18,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:03:18,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:18,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:03:18,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:18,829 INFO L87 Difference]: Start difference. First operand 487 states and 1531 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:18,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:18,979 INFO L93 Difference]: Finished difference Result 664 states and 2050 transitions. [2021-06-12 20:03:18,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:18,979 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:18,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:18,980 INFO L225 Difference]: With dead ends: 664 [2021-06-12 20:03:18,980 INFO L226 Difference]: Without dead ends: 635 [2021-06-12 20:03:18,980 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:18,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-06-12 20:03:18,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 487. [2021-06-12 20:03:18,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.1502057613168724) internal successors, (1531), 486 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:18,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1531 transitions. [2021-06-12 20:03:18,985 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1531 transitions. Word has length 21 [2021-06-12 20:03:18,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:18,985 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1531 transitions. [2021-06-12 20:03:18,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:18,986 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1531 transitions. [2021-06-12 20:03:18,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:18,986 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:18,986 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:19,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3094,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:19,187 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:19,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:19,187 INFO L82 PathProgramCache]: Analyzing trace with hash -104414945, now seen corresponding path program 618 times [2021-06-12 20:03:19,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:19,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583685051] [2021-06-12 20:03:19,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:19,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:19,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:19,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583685051] [2021-06-12 20:03:19,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583685051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:19,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94002632] [2021-06-12 20:03:19,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:19,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:03:19,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:19,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:19,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:19,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:19,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:19,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:19,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:19,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 20:03:19,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:19,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:19,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:03:19,396 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:19,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:19,402 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:03:19,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:19,403 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:03:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:19,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94002632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:19,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:19,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:03:19,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101925917] [2021-06-12 20:03:19,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:03:19,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:19,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:03:19,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:03:19,421 INFO L87 Difference]: Start difference. First operand 487 states and 1531 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:19,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:19,595 INFO L93 Difference]: Finished difference Result 637 states and 1959 transitions. [2021-06-12 20:03:19,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:19,595 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:19,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:19,596 INFO L225 Difference]: With dead ends: 637 [2021-06-12 20:03:19,596 INFO L226 Difference]: Without dead ends: 610 [2021-06-12 20:03:19,596 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 136.9ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:19,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-06-12 20:03:19,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 484. [2021-06-12 20:03:19,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.153209109730849) internal successors, (1523), 483 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:19,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1523 transitions. [2021-06-12 20:03:19,601 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1523 transitions. Word has length 21 [2021-06-12 20:03:19,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:19,601 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1523 transitions. [2021-06-12 20:03:19,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:19,602 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1523 transitions. [2021-06-12 20:03:19,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:19,602 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:19,602 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:19,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3102 [2021-06-12 20:03:19,803 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:19,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:19,803 INFO L82 PathProgramCache]: Analyzing trace with hash -728700709, now seen corresponding path program 619 times [2021-06-12 20:03:19,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:19,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663683441] [2021-06-12 20:03:19,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:19,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:19,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663683441] [2021-06-12 20:03:19,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663683441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:19,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831611118] [2021-06-12 20:03:19,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:19,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:19,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:19,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:19,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:19,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:19,954 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:19,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:19,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:19,963 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:03:19,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:19,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:20,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:20,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:20,004 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:20,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:20,012 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:03:20,012 INFO L518 ElimStorePlain]: Eliminatee v_prenex_151 vanished before elimination [2021-06-12 20:03:20,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:20,013 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:21 [2021-06-12 20:03:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:20,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831611118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:20,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:20,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:03:20,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776625438] [2021-06-12 20:03:20,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:03:20,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:20,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:03:20,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:03:20,047 INFO L87 Difference]: Start difference. First operand 484 states and 1523 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:20,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:20,201 INFO L93 Difference]: Finished difference Result 661 states and 2042 transitions. [2021-06-12 20:03:20,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:20,201 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:20,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:20,202 INFO L225 Difference]: With dead ends: 661 [2021-06-12 20:03:20,202 INFO L226 Difference]: Without dead ends: 632 [2021-06-12 20:03:20,202 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:03:20,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-06-12 20:03:20,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 484. [2021-06-12 20:03:20,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.153209109730849) internal successors, (1523), 483 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:20,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1523 transitions. [2021-06-12 20:03:20,208 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1523 transitions. Word has length 21 [2021-06-12 20:03:20,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:20,208 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1523 transitions. [2021-06-12 20:03:20,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:20,208 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1523 transitions. [2021-06-12 20:03:20,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:20,208 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:20,208 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:20,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3106,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:20,409 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:20,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:20,409 INFO L82 PathProgramCache]: Analyzing trace with hash -431434299, now seen corresponding path program 620 times [2021-06-12 20:03:20,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:20,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498484390] [2021-06-12 20:03:20,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:20,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:20,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498484390] [2021-06-12 20:03:20,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498484390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:20,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482102854] [2021-06-12 20:03:20,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:20,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:20,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:20,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:20,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:20,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:20,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:20,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:20,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:20,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:20,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:20,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:20,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:20,646 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:62, output treesize:38 [2021-06-12 20:03:20,691 INFO L446 ElimStorePlain]: Different costs {0=[o_2, o_4], 1=[v_prenex_152, v_prenex_153]} [2021-06-12 20:03:20,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:20,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:20,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:20,709 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:03:20,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:20,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:20,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:20,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:20,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:20,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:20,727 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:20,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:20,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:20,739 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:56, output treesize:19 [2021-06-12 20:03:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:20,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482102854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:20,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:20,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:03:20,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457617607] [2021-06-12 20:03:20,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:03:20,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:20,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:03:20,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:20,784 INFO L87 Difference]: Start difference. First operand 484 states and 1523 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:20,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:20,924 INFO L93 Difference]: Finished difference Result 685 states and 2115 transitions. [2021-06-12 20:03:20,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:20,924 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:20,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:20,925 INFO L225 Difference]: With dead ends: 685 [2021-06-12 20:03:20,925 INFO L226 Difference]: Without dead ends: 662 [2021-06-12 20:03:20,925 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 200.8ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:20,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-06-12 20:03:20,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 485. [2021-06-12 20:03:20,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.159090909090909) internal successors, (1529), 484 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:20,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1529 transitions. [2021-06-12 20:03:20,930 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1529 transitions. Word has length 21 [2021-06-12 20:03:20,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:20,930 INFO L482 AbstractCegarLoop]: Abstraction has 485 states and 1529 transitions. [2021-06-12 20:03:20,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:20,930 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1529 transitions. [2021-06-12 20:03:20,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:20,931 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:20,931 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:21,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 621 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3111 [2021-06-12 20:03:21,131 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:21,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:21,132 INFO L82 PathProgramCache]: Analyzing trace with hash -715696983, now seen corresponding path program 621 times [2021-06-12 20:03:21,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:21,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258248191] [2021-06-12 20:03:21,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:21,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:21,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:21,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258248191] [2021-06-12 20:03:21,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258248191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:21,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144235127] [2021-06-12 20:03:21,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:21,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:03:21,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:21,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:21,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:21,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:21,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:21,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:21,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:21,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 20:03:21,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:03:21,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:21,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:21,321 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:21,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:21,329 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:03:21,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:21,330 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:45, output treesize:19 [2021-06-12 20:03:21,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:21,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144235127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:21,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:21,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:03:21,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047584083] [2021-06-12 20:03:21,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:03:21,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:21,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:03:21,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:21,402 INFO L87 Difference]: Start difference. First operand 485 states and 1529 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:21,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:21,578 INFO L93 Difference]: Finished difference Result 690 states and 2123 transitions. [2021-06-12 20:03:21,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:21,578 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:21,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:21,579 INFO L225 Difference]: With dead ends: 690 [2021-06-12 20:03:21,579 INFO L226 Difference]: Without dead ends: 663 [2021-06-12 20:03:21,579 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 181.9ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:03:21,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-12 20:03:21,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 483. [2021-06-12 20:03:21,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 3.1493775933609958) internal successors, (1518), 482 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:21,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1518 transitions. [2021-06-12 20:03:21,585 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1518 transitions. Word has length 21 [2021-06-12 20:03:21,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:21,585 INFO L482 AbstractCegarLoop]: Abstraction has 483 states and 1518 transitions. [2021-06-12 20:03:21,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:21,585 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1518 transitions. [2021-06-12 20:03:21,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:21,585 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:21,585 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:21,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 622 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3121 [2021-06-12 20:03:21,786 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:21,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:21,786 INFO L82 PathProgramCache]: Analyzing trace with hash 739785677, now seen corresponding path program 622 times [2021-06-12 20:03:21,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:21,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742676836] [2021-06-12 20:03:21,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:21,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:21,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:21,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:21,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742676836] [2021-06-12 20:03:21,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742676836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:21,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074063613] [2021-06-12 20:03:21,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:21,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:21,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:21,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:21,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:21,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:21,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:21,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:21,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:21,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:03:21,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:21,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:21,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:21,995 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:03:21,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:21,996 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:03:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:22,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074063613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:22,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:22,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:03:22,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413078070] [2021-06-12 20:03:22,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:03:22,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:22,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:03:22,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:03:22,008 INFO L87 Difference]: Start difference. First operand 483 states and 1518 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:22,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:22,139 INFO L93 Difference]: Finished difference Result 659 states and 2033 transitions. [2021-06-12 20:03:22,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:22,140 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:22,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:22,141 INFO L225 Difference]: With dead ends: 659 [2021-06-12 20:03:22,141 INFO L226 Difference]: Without dead ends: 640 [2021-06-12 20:03:22,141 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:22,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-12 20:03:22,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 483. [2021-06-12 20:03:22,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 3.1493775933609958) internal successors, (1518), 482 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:22,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1518 transitions. [2021-06-12 20:03:22,146 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1518 transitions. Word has length 21 [2021-06-12 20:03:22,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:22,146 INFO L482 AbstractCegarLoop]: Abstraction has 483 states and 1518 transitions. [2021-06-12 20:03:22,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:22,147 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1518 transitions. [2021-06-12 20:03:22,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:22,147 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:22,147 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:22,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 623 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3130 [2021-06-12 20:03:22,348 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:22,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:22,348 INFO L82 PathProgramCache]: Analyzing trace with hash 119921763, now seen corresponding path program 623 times [2021-06-12 20:03:22,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:22,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682411245] [2021-06-12 20:03:22,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:22,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:22,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682411245] [2021-06-12 20:03:22,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682411245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:22,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075499189] [2021-06-12 20:03:22,416 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:22,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:03:22,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:22,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:22,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:22,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:22,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:22,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:22,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:22,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-06-12 20:03:22,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:03:22,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:22,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:03:22,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:22,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:22,519 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:03:22,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:22,520 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-06-12 20:03:22,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:22,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075499189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:22,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:22,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:03:22,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331691761] [2021-06-12 20:03:22,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:03:22,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:22,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:03:22,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:03:22,553 INFO L87 Difference]: Start difference. First operand 483 states and 1518 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:22,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:22,697 INFO L93 Difference]: Finished difference Result 626 states and 1929 transitions. [2021-06-12 20:03:22,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:22,697 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:22,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:22,698 INFO L225 Difference]: With dead ends: 626 [2021-06-12 20:03:22,698 INFO L226 Difference]: Without dead ends: 597 [2021-06-12 20:03:22,698 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:22,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-06-12 20:03:22,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 481. [2021-06-12 20:03:22,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.152083333333333) internal successors, (1513), 480 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:22,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1513 transitions. [2021-06-12 20:03:22,703 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1513 transitions. Word has length 21 [2021-06-12 20:03:22,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:22,703 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1513 transitions. [2021-06-12 20:03:22,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:22,703 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1513 transitions. [2021-06-12 20:03:22,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:22,704 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:22,704 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:22,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 624 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3133 [2021-06-12 20:03:22,904 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:22,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:22,904 INFO L82 PathProgramCache]: Analyzing trace with hash 417188173, now seen corresponding path program 624 times [2021-06-12 20:03:22,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:22,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638640620] [2021-06-12 20:03:22,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:23,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:23,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638640620] [2021-06-12 20:03:23,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638640620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:23,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297552741] [2021-06-12 20:03:23,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:23,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:03:23,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:23,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:23,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:23,118 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[v_prenex_154]} [2021-06-12 20:03:23,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:23,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:23,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:23,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:23,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:23,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:23,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:23,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:23,152 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:36 [2021-06-12 20:03:23,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:23,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:23,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:23,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:23,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:23,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:23,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:23,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:23,216 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:23,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:23,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:23,232 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:64, output treesize:19 [2021-06-12 20:03:23,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:23,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297552741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:23,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:23,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:23,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891812548] [2021-06-12 20:03:23,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:23,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:23,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:23,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:23,305 INFO L87 Difference]: Start difference. First operand 481 states and 1513 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:23,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:23,658 INFO L93 Difference]: Finished difference Result 825 states and 2525 transitions. [2021-06-12 20:03:23,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:03:23,659 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:23,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:23,660 INFO L225 Difference]: With dead ends: 825 [2021-06-12 20:03:23,660 INFO L226 Difference]: Without dead ends: 802 [2021-06-12 20:03:23,660 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 370.6ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:03:23,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-06-12 20:03:23,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 496. [2021-06-12 20:03:23,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 3.1676767676767676) internal successors, (1568), 495 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:23,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1568 transitions. [2021-06-12 20:03:23,666 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1568 transitions. Word has length 21 [2021-06-12 20:03:23,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:23,666 INFO L482 AbstractCegarLoop]: Abstraction has 496 states and 1568 transitions. [2021-06-12 20:03:23,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:23,666 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1568 transitions. [2021-06-12 20:03:23,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:23,671 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:23,671 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:23,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3136,625 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:23,871 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:23,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:23,872 INFO L82 PathProgramCache]: Analyzing trace with hash 132925489, now seen corresponding path program 625 times [2021-06-12 20:03:23,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:23,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316498151] [2021-06-12 20:03:23,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:23,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:23,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:23,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:23,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316498151] [2021-06-12 20:03:23,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316498151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:23,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575376526] [2021-06-12 20:03:23,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:23,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:23,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:24,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:24,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:24,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:24,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:24,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:24,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:24,040 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:03:24,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:24,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:24,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:24,077 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:03:24,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:24,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:24,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:24,088 INFO L518 ElimStorePlain]: Eliminatee v_prenex_156 vanished before elimination [2021-06-12 20:03:24,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:24,088 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:19 [2021-06-12 20:03:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:24,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575376526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:24,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:24,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:03:24,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437340021] [2021-06-12 20:03:24,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:03:24,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:24,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:03:24,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:24,174 INFO L87 Difference]: Start difference. First operand 496 states and 1568 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:24,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:24,391 INFO L93 Difference]: Finished difference Result 747 states and 2287 transitions. [2021-06-12 20:03:24,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:03:24,391 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:24,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:24,392 INFO L225 Difference]: With dead ends: 747 [2021-06-12 20:03:24,392 INFO L226 Difference]: Without dead ends: 720 [2021-06-12 20:03:24,392 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 235.8ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:03:24,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-06-12 20:03:24,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 507. [2021-06-12 20:03:24,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.1699604743083003) internal successors, (1604), 506 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:24,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1604 transitions. [2021-06-12 20:03:24,398 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1604 transitions. Word has length 21 [2021-06-12 20:03:24,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:24,398 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1604 transitions. [2021-06-12 20:03:24,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:24,398 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1604 transitions. [2021-06-12 20:03:24,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:24,398 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:24,398 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:24,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3146,626 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:24,599 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:24,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:24,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1827821477, now seen corresponding path program 626 times [2021-06-12 20:03:24,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:24,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441093459] [2021-06-12 20:03:24,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:24,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:24,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441093459] [2021-06-12 20:03:24,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441093459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:24,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012135760] [2021-06-12 20:03:24,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:24,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:24,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:24,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:24,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:24,813 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_157], 1=[o_2]} [2021-06-12 20:03:24,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:24,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:24,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:24,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:24,833 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:24,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:24,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:24,846 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:36 [2021-06-12 20:03:24,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:24,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:24,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:24,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:24,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:24,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:24,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:24,917 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:10 [2021-06-12 20:03:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:24,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012135760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:24,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:24,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:24,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855422590] [2021-06-12 20:03:24,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:24,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:24,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:24,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:24,962 INFO L87 Difference]: Start difference. First operand 507 states and 1604 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:25,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:25,347 INFO L93 Difference]: Finished difference Result 772 states and 2373 transitions. [2021-06-12 20:03:25,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:03:25,347 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:25,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:25,348 INFO L225 Difference]: With dead ends: 772 [2021-06-12 20:03:25,348 INFO L226 Difference]: Without dead ends: 753 [2021-06-12 20:03:25,348 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 374.8ms TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:03:25,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-06-12 20:03:25,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 493. [2021-06-12 20:03:25,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.160569105691057) internal successors, (1555), 492 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:25,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1555 transitions. [2021-06-12 20:03:25,354 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1555 transitions. Word has length 21 [2021-06-12 20:03:25,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:25,354 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1555 transitions. [2021-06-12 20:03:25,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:25,354 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1555 transitions. [2021-06-12 20:03:25,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:25,354 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:25,354 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:25,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3157,627 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:25,555 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:25,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:25,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1293533791, now seen corresponding path program 627 times [2021-06-12 20:03:25,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:25,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691035214] [2021-06-12 20:03:25,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:25,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:25,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:25,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691035214] [2021-06-12 20:03:25,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691035214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:25,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29972007] [2021-06-12 20:03:25,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:25,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:03:25,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:25,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:25,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:25,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:25,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:25,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:25,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:25,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:25,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:25,724 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:03:25,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:25,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:25,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:25,762 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:03:25,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:25,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:03:25,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:25,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29972007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:25,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:25,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:03:25,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353441771] [2021-06-12 20:03:25,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:03:25,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:25,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:03:25,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:25,804 INFO L87 Difference]: Start difference. First operand 493 states and 1555 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:26,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:26,009 INFO L93 Difference]: Finished difference Result 675 states and 2074 transitions. [2021-06-12 20:03:26,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:26,009 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:26,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:26,010 INFO L225 Difference]: With dead ends: 675 [2021-06-12 20:03:26,010 INFO L226 Difference]: Without dead ends: 654 [2021-06-12 20:03:26,010 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 202.1ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:26,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-06-12 20:03:26,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 475. [2021-06-12 20:03:26,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.1392405063291138) internal successors, (1488), 474 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:26,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1488 transitions. [2021-06-12 20:03:26,015 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1488 transitions. Word has length 21 [2021-06-12 20:03:26,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:26,016 INFO L482 AbstractCegarLoop]: Abstraction has 475 states and 1488 transitions. [2021-06-12 20:03:26,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:26,016 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1488 transitions. [2021-06-12 20:03:26,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:26,016 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:26,016 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:26,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 628 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3162 [2021-06-12 20:03:26,217 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:26,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:26,217 INFO L82 PathProgramCache]: Analyzing trace with hash 447204325, now seen corresponding path program 628 times [2021-06-12 20:03:26,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:26,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447032357] [2021-06-12 20:03:26,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:26,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:26,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:26,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:26,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447032357] [2021-06-12 20:03:26,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447032357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:26,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082648766] [2021-06-12 20:03:26,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:26,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:26,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:26,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:26,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:26,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:26,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:26,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:26,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:26,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:26,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:27 [2021-06-12 20:03:26,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:26,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:26,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:26,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:26,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:26,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:03:26,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:26,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:26,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:26,548 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:31, output treesize:9 [2021-06-12 20:03:26,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:26,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082648766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:26,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:26,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:03:26,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488842162] [2021-06-12 20:03:26,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:03:26,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:26,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:03:26,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:26,558 INFO L87 Difference]: Start difference. First operand 475 states and 1488 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:26,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:26,756 INFO L93 Difference]: Finished difference Result 554 states and 1715 transitions. [2021-06-12 20:03:26,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:26,761 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:26,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:26,762 INFO L225 Difference]: With dead ends: 554 [2021-06-12 20:03:26,762 INFO L226 Difference]: Without dead ends: 532 [2021-06-12 20:03:26,762 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 177.1ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:26,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-06-12 20:03:26,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 481. [2021-06-12 20:03:26,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.14375) internal successors, (1509), 480 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:26,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1509 transitions. [2021-06-12 20:03:26,768 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1509 transitions. Word has length 21 [2021-06-12 20:03:26,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:26,768 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1509 transitions. [2021-06-12 20:03:26,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:26,769 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1509 transitions. [2021-06-12 20:03:26,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:26,769 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:26,769 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:26,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 629 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3165 [2021-06-12 20:03:26,970 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:26,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:26,970 INFO L82 PathProgramCache]: Analyzing trace with hash -54587011, now seen corresponding path program 629 times [2021-06-12 20:03:26,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:26,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294529858] [2021-06-12 20:03:26,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:26,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:27,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:27,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294529858] [2021-06-12 20:03:27,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294529858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:27,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132289740] [2021-06-12 20:03:27,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:27,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:27,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:27,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:27,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:27,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:27,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:27,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:27,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:32 [2021-06-12 20:03:27,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:27,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:27,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:03:27,238 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:27,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,246 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 20:03:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:27,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132289740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:27,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:27,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:03:27,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088976919] [2021-06-12 20:03:27,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:03:27,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:27,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:03:27,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:27,274 INFO L87 Difference]: Start difference. First operand 481 states and 1509 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:27,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:27,436 INFO L93 Difference]: Finished difference Result 563 states and 1739 transitions. [2021-06-12 20:03:27,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:27,437 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:27,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:27,437 INFO L225 Difference]: With dead ends: 563 [2021-06-12 20:03:27,437 INFO L226 Difference]: Without dead ends: 541 [2021-06-12 20:03:27,437 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 162.9ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:27,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-06-12 20:03:27,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 478. [2021-06-12 20:03:27,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.138364779874214) internal successors, (1497), 477 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:27,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1497 transitions. [2021-06-12 20:03:27,442 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1497 transitions. Word has length 21 [2021-06-12 20:03:27,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:27,442 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1497 transitions. [2021-06-12 20:03:27,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:27,442 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1497 transitions. [2021-06-12 20:03:27,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:27,443 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:27,443 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:27,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3172,630 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:27,643 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:27,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:27,643 INFO L82 PathProgramCache]: Analyzing trace with hash 2133596165, now seen corresponding path program 630 times [2021-06-12 20:03:27,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:27,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175463325] [2021-06-12 20:03:27,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:27,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:27,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:27,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175463325] [2021-06-12 20:03:27,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175463325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:27,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45955754] [2021-06-12 20:03:27,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:27,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:03:27,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:27,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:27,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:27,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:27,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:27,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:27,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 20:03:27,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:27,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:27,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:03:27,927 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:27,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,936 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 20:03:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:27,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45955754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:27,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:27,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:03:27,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437636446] [2021-06-12 20:03:27,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:03:27,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:27,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:03:27,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:27,955 INFO L87 Difference]: Start difference. First operand 478 states and 1497 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:28,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:28,098 INFO L93 Difference]: Finished difference Result 551 states and 1706 transitions. [2021-06-12 20:03:28,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:28,098 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:28,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:28,099 INFO L225 Difference]: With dead ends: 551 [2021-06-12 20:03:28,099 INFO L226 Difference]: Without dead ends: 529 [2021-06-12 20:03:28,099 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 176.2ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:28,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-12 20:03:28,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 475. [2021-06-12 20:03:28,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.1392405063291138) internal successors, (1488), 474 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:28,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1488 transitions. [2021-06-12 20:03:28,104 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1488 transitions. Word has length 21 [2021-06-12 20:03:28,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:28,104 INFO L482 AbstractCegarLoop]: Abstraction has 475 states and 1488 transitions. [2021-06-12 20:03:28,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:28,104 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1488 transitions. [2021-06-12 20:03:28,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:28,105 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:28,105 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:28,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3175 [2021-06-12 20:03:28,305 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:28,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:28,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1864793109, now seen corresponding path program 631 times [2021-06-12 20:03:28,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:28,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889634449] [2021-06-12 20:03:28,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:28,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:28,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889634449] [2021-06-12 20:03:28,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889634449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:28,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483815480] [2021-06-12 20:03:28,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:28,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:28,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:28,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:28,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:28,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:28,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:28,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:34 [2021-06-12 20:03:28,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:03:28,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:28,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:28,630 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:28,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:28,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:28,654 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:28,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:28,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:28,673 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:61, output treesize:5 [2021-06-12 20:03:28,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:28,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483815480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:28,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:28,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:28,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253825376] [2021-06-12 20:03:28,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:28,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:28,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:28,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:28,707 INFO L87 Difference]: Start difference. First operand 475 states and 1488 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:29,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:29,001 INFO L93 Difference]: Finished difference Result 752 states and 2297 transitions. [2021-06-12 20:03:29,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:03:29,002 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:29,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:29,002 INFO L225 Difference]: With dead ends: 752 [2021-06-12 20:03:29,002 INFO L226 Difference]: Without dead ends: 692 [2021-06-12 20:03:29,003 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 212.9ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:29,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-06-12 20:03:29,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 475. [2021-06-12 20:03:29,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.1392405063291138) internal successors, (1488), 474 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:29,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1488 transitions. [2021-06-12 20:03:29,008 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1488 transitions. Word has length 21 [2021-06-12 20:03:29,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:29,008 INFO L482 AbstractCegarLoop]: Abstraction has 475 states and 1488 transitions. [2021-06-12 20:03:29,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:29,008 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1488 transitions. [2021-06-12 20:03:29,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:29,009 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:29,009 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:29,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3178,632 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:29,209 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:29,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:29,209 INFO L82 PathProgramCache]: Analyzing trace with hash -841990937, now seen corresponding path program 632 times [2021-06-12 20:03:29,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:29,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346705836] [2021-06-12 20:03:29,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:29,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:29,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346705836] [2021-06-12 20:03:29,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346705836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:29,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722425816] [2021-06-12 20:03:29,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:29,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:29,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:29,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:29,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:29,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:29,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:29,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:29,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:29,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:29,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 20:03:29,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:03:29,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:29,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:29,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:29,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:29,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:29,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:29,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:29,472 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:29,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:29,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:29,486 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:13 [2021-06-12 20:03:29,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:29,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722425816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:29,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:29,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:29,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614111163] [2021-06-12 20:03:29,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:29,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:29,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:29,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:29,533 INFO L87 Difference]: Start difference. First operand 475 states and 1488 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:29,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:29,801 INFO L93 Difference]: Finished difference Result 643 states and 1987 transitions. [2021-06-12 20:03:29,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:03:29,801 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:29,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:29,802 INFO L225 Difference]: With dead ends: 643 [2021-06-12 20:03:29,802 INFO L226 Difference]: Without dead ends: 616 [2021-06-12 20:03:29,802 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 187.3ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:29,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-06-12 20:03:29,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 475. [2021-06-12 20:03:29,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.1392405063291138) internal successors, (1488), 474 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:29,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1488 transitions. [2021-06-12 20:03:29,812 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1488 transitions. Word has length 21 [2021-06-12 20:03:29,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:29,812 INFO L482 AbstractCegarLoop]: Abstraction has 475 states and 1488 transitions. [2021-06-12 20:03:29,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:29,812 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1488 transitions. [2021-06-12 20:03:29,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:29,813 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:29,813 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:30,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 633 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3192 [2021-06-12 20:03:30,013 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:30,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:30,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1126253621, now seen corresponding path program 633 times [2021-06-12 20:03:30,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:30,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102761658] [2021-06-12 20:03:30,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:30,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:30,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:30,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:30,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102761658] [2021-06-12 20:03:30,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102761658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:30,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848382819] [2021-06-12 20:03:30,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:30,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:03:30,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:30,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:03:30,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:30,295 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_162, v_prenex_164], 1=[v_prenex_160, o_4]} [2021-06-12 20:03:30,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:30,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:30,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:30,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:30,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:30,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:30,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:03:30,381 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:30,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:30,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:30,419 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:30,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:30,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-06-12 20:03:30,453 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:137, output treesize:82 [2021-06-12 20:03:30,531 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-12 20:03:30,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:30,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:30,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 20:03:30,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:30,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:30,543 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:30,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:30,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:30,573 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:30,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-12 20:03:30,576 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:30,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:30,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:30,600 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 5 variables, input treesize:109, output treesize:26 [2021-06-12 20:03:30,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:30,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848382819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:30,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:30,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:30,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635688424] [2021-06-12 20:03:30,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:30,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:30,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:30,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:30,673 INFO L87 Difference]: Start difference. First operand 475 states and 1488 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:31,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:31,058 INFO L93 Difference]: Finished difference Result 686 states and 2121 transitions. [2021-06-12 20:03:31,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:03:31,059 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:31,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:31,060 INFO L225 Difference]: With dead ends: 686 [2021-06-12 20:03:31,060 INFO L226 Difference]: Without dead ends: 659 [2021-06-12 20:03:31,060 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 406.6ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:03:31,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-06-12 20:03:31,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 487. [2021-06-12 20:03:31,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.1316872427983538) internal successors, (1522), 486 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:31,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1522 transitions. [2021-06-12 20:03:31,065 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1522 transitions. Word has length 21 [2021-06-12 20:03:31,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:31,065 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1522 transitions. [2021-06-12 20:03:31,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:31,065 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1522 transitions. [2021-06-12 20:03:31,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:31,066 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:31,066 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:31,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3202,634 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:31,266 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:31,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:31,266 INFO L82 PathProgramCache]: Analyzing trace with hash 560138219, now seen corresponding path program 634 times [2021-06-12 20:03:31,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:31,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210429484] [2021-06-12 20:03:31,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:31,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:31,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:31,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210429484] [2021-06-12 20:03:31,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210429484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:31,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254071484] [2021-06-12 20:03:31,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:31,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:31,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:31,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:31,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:31,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:31,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:31,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:31,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:31,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:31,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:31,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:31,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:31,510 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:03:31,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:31,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:31,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:31,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:31,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:31,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:31,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:31,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:31,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:31,579 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:7 [2021-06-12 20:03:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:31,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254071484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:31,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:31,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:31,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366973792] [2021-06-12 20:03:31,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:31,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:31,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:31,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:31,610 INFO L87 Difference]: Start difference. First operand 487 states and 1522 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:31,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:31,735 INFO L93 Difference]: Finished difference Result 619 states and 1909 transitions. [2021-06-12 20:03:31,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:31,736 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:31,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:31,736 INFO L225 Difference]: With dead ends: 619 [2021-06-12 20:03:31,736 INFO L226 Difference]: Without dead ends: 598 [2021-06-12 20:03:31,737 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 195.5ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:03:31,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-06-12 20:03:31,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 473. [2021-06-12 20:03:31,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.141949152542373) internal successors, (1483), 472 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:31,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1483 transitions. [2021-06-12 20:03:31,741 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1483 transitions. Word has length 21 [2021-06-12 20:03:31,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:31,741 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1483 transitions. [2021-06-12 20:03:31,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:31,742 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1483 transitions. [2021-06-12 20:03:31,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:31,742 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:31,742 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:31,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3217,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:31,942 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:31,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:31,943 INFO L82 PathProgramCache]: Analyzing trace with hash -428618089, now seen corresponding path program 635 times [2021-06-12 20:03:31,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:31,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125219787] [2021-06-12 20:03:31,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:32,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:32,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:32,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125219787] [2021-06-12 20:03:32,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125219787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:32,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750131847] [2021-06-12 20:03:32,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:32,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:32,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:32,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:32,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:32,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:32,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:32,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:32,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:32,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:32,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:32,168 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:60, output treesize:36 [2021-06-12 20:03:32,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:32,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:32,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:32,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:03:32,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:32,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:32,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:32,315 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:31, output treesize:9 [2021-06-12 20:03:32,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:32,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750131847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:32,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:32,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:03:32,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978432155] [2021-06-12 20:03:32,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:03:32,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:32,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:03:32,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:32,323 INFO L87 Difference]: Start difference. First operand 473 states and 1483 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:32,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:32,530 INFO L93 Difference]: Finished difference Result 604 states and 1869 transitions. [2021-06-12 20:03:32,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:32,530 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:32,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:32,531 INFO L225 Difference]: With dead ends: 604 [2021-06-12 20:03:32,531 INFO L226 Difference]: Without dead ends: 582 [2021-06-12 20:03:32,531 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 199.5ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:32,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-06-12 20:03:32,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 480. [2021-06-12 20:03:32,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.154488517745303) internal successors, (1511), 479 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:32,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1511 transitions. [2021-06-12 20:03:32,536 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1511 transitions. Word has length 21 [2021-06-12 20:03:32,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:32,536 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1511 transitions. [2021-06-12 20:03:32,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:32,537 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1511 transitions. [2021-06-12 20:03:32,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:32,537 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:32,537 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:32,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3226,636 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:32,738 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:32,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:32,738 INFO L82 PathProgramCache]: Analyzing trace with hash -930409425, now seen corresponding path program 636 times [2021-06-12 20:03:32,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:32,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135119503] [2021-06-12 20:03:32,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:32,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:32,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135119503] [2021-06-12 20:03:32,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135119503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:32,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548884660] [2021-06-12 20:03:32,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:32,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:03:32,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:32,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:32,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:32,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:32,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:32,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:32,950 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:32,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:32,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:32,969 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:60, output treesize:36 [2021-06-12 20:03:33,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:33,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:33,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:33,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:33,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:33,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:03:33,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:33,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:33,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:33,066 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:12 [2021-06-12 20:03:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:33,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548884660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:33,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:33,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:03:33,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155704893] [2021-06-12 20:03:33,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:03:33,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:33,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:03:33,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:33,080 INFO L87 Difference]: Start difference. First operand 480 states and 1511 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:33,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:33,276 INFO L93 Difference]: Finished difference Result 595 states and 1845 transitions. [2021-06-12 20:03:33,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:33,277 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:33,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:33,278 INFO L225 Difference]: With dead ends: 595 [2021-06-12 20:03:33,278 INFO L226 Difference]: Without dead ends: 573 [2021-06-12 20:03:33,278 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 171.9ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:33,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-06-12 20:03:33,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 477. [2021-06-12 20:03:33,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.149159663865546) internal successors, (1499), 476 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:33,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1499 transitions. [2021-06-12 20:03:33,283 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1499 transitions. Word has length 21 [2021-06-12 20:03:33,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:33,283 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1499 transitions. [2021-06-12 20:03:33,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:33,283 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1499 transitions. [2021-06-12 20:03:33,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:33,283 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:33,284 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:33,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3235,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:33,484 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:33,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:33,485 INFO L82 PathProgramCache]: Analyzing trace with hash -25502583, now seen corresponding path program 637 times [2021-06-12 20:03:33,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:33,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037666820] [2021-06-12 20:03:33,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:33,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:33,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:33,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:33,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037666820] [2021-06-12 20:03:33,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037666820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:33,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942422146] [2021-06-12 20:03:33,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:33,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:33,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:33,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:33,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:33,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:33,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:33,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:33,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:39 [2021-06-12 20:03:33,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:33,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:33,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:33,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:33,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:03:33,832 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:33,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:33,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:33,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:33,850 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:33,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:33,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:33,865 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:61, output treesize:5 [2021-06-12 20:03:33,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:33,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942422146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:33,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:33,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:03:33,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154064292] [2021-06-12 20:03:33,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:03:33,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:33,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:03:33,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:33,873 INFO L87 Difference]: Start difference. First operand 477 states and 1499 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:34,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:34,038 INFO L93 Difference]: Finished difference Result 582 states and 1793 transitions. [2021-06-12 20:03:34,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:34,039 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:34,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:34,039 INFO L225 Difference]: With dead ends: 582 [2021-06-12 20:03:34,039 INFO L226 Difference]: Without dead ends: 549 [2021-06-12 20:03:34,040 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 175.1ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:34,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-06-12 20:03:34,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 479. [2021-06-12 20:03:34,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.1401673640167362) internal successors, (1501), 478 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:34,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1501 transitions. [2021-06-12 20:03:34,045 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1501 transitions. Word has length 21 [2021-06-12 20:03:34,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:34,045 INFO L482 AbstractCegarLoop]: Abstraction has 479 states and 1501 transitions. [2021-06-12 20:03:34,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:34,045 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1501 transitions. [2021-06-12 20:03:34,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:34,045 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:34,045 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:34,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 638 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3240 [2021-06-12 20:03:34,246 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:34,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:34,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1598835185, now seen corresponding path program 638 times [2021-06-12 20:03:34,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:34,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855070310] [2021-06-12 20:03:34,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:34,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:34,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855070310] [2021-06-12 20:03:34,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855070310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:34,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368843416] [2021-06-12 20:03:34,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:34,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:34,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:34,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:34,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:34,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:34,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:34,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:34,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:34,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:34,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:39 [2021-06-12 20:03:34,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:03:34,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:34,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:34,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:34,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:34,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:34,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:34,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:34,545 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:34,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:34,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:34,563 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:71, output treesize:13 [2021-06-12 20:03:34,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:34,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368843416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:34,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:34,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:03:34,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567926596] [2021-06-12 20:03:34,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:03:34,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:34,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:03:34,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:34,594 INFO L87 Difference]: Start difference. First operand 479 states and 1501 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:34,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:34,755 INFO L93 Difference]: Finished difference Result 576 states and 1775 transitions. [2021-06-12 20:03:34,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:34,755 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:34,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:34,756 INFO L225 Difference]: With dead ends: 576 [2021-06-12 20:03:34,756 INFO L226 Difference]: Without dead ends: 549 [2021-06-12 20:03:34,756 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 160.8ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:34,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-06-12 20:03:34,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 477. [2021-06-12 20:03:34,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.142857142857143) internal successors, (1496), 476 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:34,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1496 transitions. [2021-06-12 20:03:34,761 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1496 transitions. Word has length 21 [2021-06-12 20:03:34,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:34,761 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1496 transitions. [2021-06-12 20:03:34,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:34,761 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1496 transitions. [2021-06-12 20:03:34,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:34,762 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:34,762 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:34,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3254,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:34,963 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:34,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:34,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1843992401, now seen corresponding path program 639 times [2021-06-12 20:03:34,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:34,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728663326] [2021-06-12 20:03:34,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:34,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:35,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:35,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:35,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728663326] [2021-06-12 20:03:35,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728663326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:35,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475818611] [2021-06-12 20:03:35,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:35,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:03:35,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:35,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:35,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:35,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:35,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:35,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:35,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:35,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:35,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:35,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:35,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:35,202 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:60, output treesize:36 [2021-06-12 20:03:35,317 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_165, v_prenex_166], 1=[o_2, o_4]} [2021-06-12 20:03:35,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:35,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:35,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:35,332 INFO L518 ElimStorePlain]: Eliminatee v_prenex_166 vanished before elimination [2021-06-12 20:03:35,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:35,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:35,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:35,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:35,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:35,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:03:35,347 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:35,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:35,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:35,363 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:46, output treesize:15 [2021-06-12 20:03:35,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:35,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475818611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:35,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:35,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:03:35,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973918548] [2021-06-12 20:03:35,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:03:35,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:35,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:03:35,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:35,391 INFO L87 Difference]: Start difference. First operand 477 states and 1496 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:35,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:35,592 INFO L93 Difference]: Finished difference Result 613 states and 1895 transitions. [2021-06-12 20:03:35,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:35,592 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:35,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:35,593 INFO L225 Difference]: With dead ends: 613 [2021-06-12 20:03:35,593 INFO L226 Difference]: Without dead ends: 584 [2021-06-12 20:03:35,593 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 189.3ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:35,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-06-12 20:03:35,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 477. [2021-06-12 20:03:35,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.142857142857143) internal successors, (1496), 476 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:35,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1496 transitions. [2021-06-12 20:03:35,598 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1496 transitions. Word has length 21 [2021-06-12 20:03:35,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:35,598 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1496 transitions. [2021-06-12 20:03:35,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:35,598 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1496 transitions. [2021-06-12 20:03:35,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:35,599 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:35,599 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:35,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3263 [2021-06-12 20:03:35,799 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:35,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:35,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1356275977, now seen corresponding path program 640 times [2021-06-12 20:03:35,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:35,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197155210] [2021-06-12 20:03:35,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:35,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:35,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:35,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197155210] [2021-06-12 20:03:35,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197155210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:35,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264797402] [2021-06-12 20:03:35,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:35,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:35,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:35,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:35,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:35,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:35,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:35,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:35,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:36,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:36,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:39 [2021-06-12 20:03:36,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:36,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:36,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:36,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:36,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:03:36,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:36,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:36,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:36,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:36,124 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:36,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:36,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:36,148 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:71, output treesize:19 [2021-06-12 20:03:36,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:36,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264797402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:36,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:36,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:36,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862691000] [2021-06-12 20:03:36,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:36,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:36,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:36,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:36,199 INFO L87 Difference]: Start difference. First operand 477 states and 1496 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:36,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:36,468 INFO L93 Difference]: Finished difference Result 797 states and 2434 transitions. [2021-06-12 20:03:36,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:03:36,468 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:36,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:36,469 INFO L225 Difference]: With dead ends: 797 [2021-06-12 20:03:36,469 INFO L226 Difference]: Without dead ends: 743 [2021-06-12 20:03:36,470 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 273.9ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:03:36,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-06-12 20:03:36,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 478. [2021-06-12 20:03:36,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.1635220125786163) internal successors, (1509), 477 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:36,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1509 transitions. [2021-06-12 20:03:36,475 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1509 transitions. Word has length 21 [2021-06-12 20:03:36,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:36,475 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1509 transitions. [2021-06-12 20:03:36,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:36,476 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1509 transitions. [2021-06-12 20:03:36,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:36,476 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:36,476 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:36,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3284 [2021-06-12 20:03:36,677 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:36,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:36,677 INFO L82 PathProgramCache]: Analyzing trace with hash 731990213, now seen corresponding path program 641 times [2021-06-12 20:03:36,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:36,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754290384] [2021-06-12 20:03:36,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:36,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:36,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:36,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754290384] [2021-06-12 20:03:36,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754290384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:36,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713073969] [2021-06-12 20:03:36,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:36,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:36,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:36,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:36,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:36,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:36,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:36,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:36,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:36,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:36,890 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:36,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:36,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:36,909 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:41 [2021-06-12 20:03:36,951 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_167, v_prenex_168], 1=[o_2, o_4]} [2021-06-12 20:03:36,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:36,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:36,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:36,975 INFO L518 ElimStorePlain]: Eliminatee v_prenex_168 vanished before elimination [2021-06-12 20:03:36,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:36,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:36,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:36,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:36,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:36,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:03:36,995 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:37,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:37,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:37,008 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:59, output treesize:21 [2021-06-12 20:03:37,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:37,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713073969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:37,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:37,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:03:37,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218531680] [2021-06-12 20:03:37,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:03:37,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:37,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:03:37,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:37,049 INFO L87 Difference]: Start difference. First operand 478 states and 1509 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:37,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:37,208 INFO L93 Difference]: Finished difference Result 617 states and 1911 transitions. [2021-06-12 20:03:37,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:37,209 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:37,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:37,210 INFO L225 Difference]: With dead ends: 617 [2021-06-12 20:03:37,210 INFO L226 Difference]: Without dead ends: 588 [2021-06-12 20:03:37,210 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:37,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-12 20:03:37,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 478. [2021-06-12 20:03:37,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.1635220125786163) internal successors, (1509), 477 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:37,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1509 transitions. [2021-06-12 20:03:37,214 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1509 transitions. Word has length 21 [2021-06-12 20:03:37,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:37,215 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1509 transitions. [2021-06-12 20:03:37,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:37,215 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1509 transitions. [2021-06-12 20:03:37,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:37,215 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:37,215 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:37,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 642 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3297 [2021-06-12 20:03:37,416 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:37,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:37,416 INFO L82 PathProgramCache]: Analyzing trace with hash -259337999, now seen corresponding path program 642 times [2021-06-12 20:03:37,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:37,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339073510] [2021-06-12 20:03:37,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:37,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:37,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339073510] [2021-06-12 20:03:37,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339073510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:37,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059074293] [2021-06-12 20:03:37,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:37,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:03:37,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:37,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:37,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:37,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:37,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:37,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:37,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:37,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:37,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:39 [2021-06-12 20:03:37,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:37,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:37,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:37,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:37,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:03:37,675 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:37,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:37,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:37,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:37,701 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:37,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:37,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:37,723 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:81, output treesize:19 [2021-06-12 20:03:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:37,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059074293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:37,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:37,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:37,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266685153] [2021-06-12 20:03:37,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:37,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:37,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:37,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:37,807 INFO L87 Difference]: Start difference. First operand 478 states and 1509 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:38,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:38,013 INFO L93 Difference]: Finished difference Result 700 states and 2146 transitions. [2021-06-12 20:03:38,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:03:38,013 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:38,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:38,014 INFO L225 Difference]: With dead ends: 700 [2021-06-12 20:03:38,014 INFO L226 Difference]: Without dead ends: 673 [2021-06-12 20:03:38,014 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 253.8ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:03:38,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-06-12 20:03:38,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 473. [2021-06-12 20:03:38,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.141949152542373) internal successors, (1483), 472 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:38,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1483 transitions. [2021-06-12 20:03:38,019 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1483 transitions. Word has length 21 [2021-06-12 20:03:38,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:38,019 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1483 transitions. [2021-06-12 20:03:38,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:38,019 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1483 transitions. [2021-06-12 20:03:38,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:38,020 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:38,020 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:38,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 643 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3304 [2021-06-12 20:03:38,221 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:38,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:38,221 INFO L82 PathProgramCache]: Analyzing trace with hash 2128377391, now seen corresponding path program 643 times [2021-06-12 20:03:38,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:38,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196908719] [2021-06-12 20:03:38,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:38,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:38,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:38,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:38,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196908719] [2021-06-12 20:03:38,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196908719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:38,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453553683] [2021-06-12 20:03:38,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:38,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:38,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:38,425 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[v_prenex_169]} [2021-06-12 20:03:38,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:38,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:38,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:38,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:38,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:38,446 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:38,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:38,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:38,461 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:55, output treesize:39 [2021-06-12 20:03:38,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:38,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:38,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:38,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:38,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:38,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:03:38,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:38,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:38,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:38,545 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 20:03:38,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:38,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453553683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:38,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:38,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:03:38,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756236958] [2021-06-12 20:03:38,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:03:38,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:38,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:03:38,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:38,564 INFO L87 Difference]: Start difference. First operand 473 states and 1483 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:38,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:38,724 INFO L93 Difference]: Finished difference Result 592 states and 1831 transitions. [2021-06-12 20:03:38,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:38,724 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:38,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:38,725 INFO L225 Difference]: With dead ends: 592 [2021-06-12 20:03:38,725 INFO L226 Difference]: Without dead ends: 570 [2021-06-12 20:03:38,725 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 179.4ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:38,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-12 20:03:38,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 476. [2021-06-12 20:03:38,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.1473684210526316) internal successors, (1495), 475 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1495 transitions. [2021-06-12 20:03:38,730 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1495 transitions. Word has length 21 [2021-06-12 20:03:38,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:38,730 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1495 transitions. [2021-06-12 20:03:38,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:38,730 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1495 transitions. [2021-06-12 20:03:38,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:38,731 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:38,731 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:38,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3314,644 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:38,931 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:38,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:38,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1541265787, now seen corresponding path program 644 times [2021-06-12 20:03:38,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:38,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963556118] [2021-06-12 20:03:38,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:39,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:39,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:39,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963556118] [2021-06-12 20:03:39,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963556118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:39,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328659630] [2021-06-12 20:03:39,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:39,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:39,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:39,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:39,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:39,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:39,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:39,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:39,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:39,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:39,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 20:03:39,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:03:39,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:39,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:39,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:39,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:39,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:39,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:39,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:39,199 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:39,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:39,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:39,214 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:13 [2021-06-12 20:03:39,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:39,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328659630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:39,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:39,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:03:39,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87033096] [2021-06-12 20:03:39,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:03:39,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:39,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:03:39,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:39,233 INFO L87 Difference]: Start difference. First operand 476 states and 1495 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:39,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:39,421 INFO L93 Difference]: Finished difference Result 585 states and 1801 transitions. [2021-06-12 20:03:39,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:39,421 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:39,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:39,422 INFO L225 Difference]: With dead ends: 585 [2021-06-12 20:03:39,422 INFO L226 Difference]: Without dead ends: 558 [2021-06-12 20:03:39,422 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 137.1ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:39,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-12 20:03:39,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 476. [2021-06-12 20:03:39,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.143157894736842) internal successors, (1493), 475 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:39,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1493 transitions. [2021-06-12 20:03:39,427 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1493 transitions. Word has length 21 [2021-06-12 20:03:39,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:39,428 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1493 transitions. [2021-06-12 20:03:39,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:39,428 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1493 transitions. [2021-06-12 20:03:39,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:39,428 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:39,428 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:39,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 645 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3319 [2021-06-12 20:03:39,629 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:39,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:39,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1825528471, now seen corresponding path program 645 times [2021-06-12 20:03:39,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:39,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709390972] [2021-06-12 20:03:39,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:39,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:39,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709390972] [2021-06-12 20:03:39,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709390972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:39,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939293741] [2021-06-12 20:03:39,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:39,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:03:39,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:39,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:39,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:39,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:39,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:39,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:39,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:39,822 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:39,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:39,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:39,842 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:46 [2021-06-12 20:03:39,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:39,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:39,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:39,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:39,942 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:39,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:39,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:39,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:39,958 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:39,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:39,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:39,972 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:61, output treesize:13 [2021-06-12 20:03:40,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:40,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939293741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:40,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:40,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:03:40,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463613803] [2021-06-12 20:03:40,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:03:40,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:40,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:03:40,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:40,004 INFO L87 Difference]: Start difference. First operand 476 states and 1493 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:40,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:40,216 INFO L93 Difference]: Finished difference Result 638 states and 1948 transitions. [2021-06-12 20:03:40,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:40,217 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:40,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:40,217 INFO L225 Difference]: With dead ends: 638 [2021-06-12 20:03:40,218 INFO L226 Difference]: Without dead ends: 611 [2021-06-12 20:03:40,218 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 199.5ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:40,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-06-12 20:03:40,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 489. [2021-06-12 20:03:40,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 3.139344262295082) internal successors, (1532), 488 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:40,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1532 transitions. [2021-06-12 20:03:40,223 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1532 transitions. Word has length 21 [2021-06-12 20:03:40,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:40,223 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1532 transitions. [2021-06-12 20:03:40,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:40,223 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1532 transitions. [2021-06-12 20:03:40,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:40,224 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:40,224 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:40,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 646 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3329 [2021-06-12 20:03:40,424 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:40,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:40,425 INFO L82 PathProgramCache]: Analyzing trace with hash -139136631, now seen corresponding path program 646 times [2021-06-12 20:03:40,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:40,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086115523] [2021-06-12 20:03:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:40,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:40,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:40,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086115523] [2021-06-12 20:03:40,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086115523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:40,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429391157] [2021-06-12 20:03:40,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:40,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:40,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:40,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:40,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:40,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:40,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:40,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:40,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:40,610 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:40,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:40,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:40,630 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:46 [2021-06-12 20:03:40,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:40,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:40,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:40,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:40,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:40,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:40,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:40,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:40,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:40,758 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:7 [2021-06-12 20:03:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:40,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429391157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:40,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:40,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:03:40,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079133972] [2021-06-12 20:03:40,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:03:40,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:40,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:03:40,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:40,777 INFO L87 Difference]: Start difference. First operand 489 states and 1532 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:40,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:40,973 INFO L93 Difference]: Finished difference Result 567 states and 1741 transitions. [2021-06-12 20:03:40,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:40,973 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:40,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:40,974 INFO L225 Difference]: With dead ends: 567 [2021-06-12 20:03:40,974 INFO L226 Difference]: Without dead ends: 546 [2021-06-12 20:03:40,974 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 198.8ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:40,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-12 20:03:40,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 479. [2021-06-12 20:03:40,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.1485355648535567) internal successors, (1505), 478 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:40,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1505 transitions. [2021-06-12 20:03:40,979 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1505 transitions. Word has length 21 [2021-06-12 20:03:40,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:40,979 INFO L482 AbstractCegarLoop]: Abstraction has 479 states and 1505 transitions. [2021-06-12 20:03:40,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:40,979 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1505 transitions. [2021-06-12 20:03:40,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:40,980 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:40,980 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:41,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3348,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:41,180 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:41,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:41,180 INFO L82 PathProgramCache]: Analyzing trace with hash -116632259, now seen corresponding path program 647 times [2021-06-12 20:03:41,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:41,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541854752] [2021-06-12 20:03:41,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:41,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:41,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541854752] [2021-06-12 20:03:41,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541854752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:41,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687000543] [2021-06-12 20:03:41,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:41,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:41,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:41,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:41,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:41,380 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[v_prenex_170]} [2021-06-12 20:03:41,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:41,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:41,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:41,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:41,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:41,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:41,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:41,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:41,415 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:55, output treesize:39 [2021-06-12 20:03:41,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:41,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:41,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:41,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:41,462 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:41,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:41,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:41,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:03:41,482 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:41,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:41,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:41,498 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:67, output treesize:21 [2021-06-12 20:03:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:41,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687000543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:41,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:41,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:03:41,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073651327] [2021-06-12 20:03:41,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:03:41,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:41,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:03:41,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:41,539 INFO L87 Difference]: Start difference. First operand 479 states and 1505 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:41,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:41,686 INFO L93 Difference]: Finished difference Result 610 states and 1890 transitions. [2021-06-12 20:03:41,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:41,686 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:41,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:41,687 INFO L225 Difference]: With dead ends: 610 [2021-06-12 20:03:41,687 INFO L226 Difference]: Without dead ends: 581 [2021-06-12 20:03:41,687 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 169.6ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:41,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-06-12 20:03:41,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 479. [2021-06-12 20:03:41,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.1485355648535567) internal successors, (1505), 478 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:41,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1505 transitions. [2021-06-12 20:03:41,692 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1505 transitions. Word has length 21 [2021-06-12 20:03:41,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:41,692 INFO L482 AbstractCegarLoop]: Abstraction has 479 states and 1505 transitions. [2021-06-12 20:03:41,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:41,692 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1505 transitions. [2021-06-12 20:03:41,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:41,693 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:41,693 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:41,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 648 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3361 [2021-06-12 20:03:41,893 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:41,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:41,894 INFO L82 PathProgramCache]: Analyzing trace with hash 180634151, now seen corresponding path program 648 times [2021-06-12 20:03:41,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:41,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995257981] [2021-06-12 20:03:41,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:41,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:41,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:41,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995257981] [2021-06-12 20:03:41,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995257981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:41,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560770126] [2021-06-12 20:03:41,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:42,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:03:42,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:42,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:42,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:42,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:42,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:42,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:42,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:42,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:42,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 20:03:42,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:42,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:42,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:42,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:42,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:03:42,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:42,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:42,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:42,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:42,141 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:42,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:42,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:42,158 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:22 [2021-06-12 20:03:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:42,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560770126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:42,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:42,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:03:42,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345832070] [2021-06-12 20:03:42,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:03:42,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:42,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:03:42,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:42,203 INFO L87 Difference]: Start difference. First operand 479 states and 1505 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:42,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:42,361 INFO L93 Difference]: Finished difference Result 575 states and 1776 transitions. [2021-06-12 20:03:42,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:42,361 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:42,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:42,362 INFO L225 Difference]: With dead ends: 575 [2021-06-12 20:03:42,362 INFO L226 Difference]: Without dead ends: 552 [2021-06-12 20:03:42,362 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:42,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-06-12 20:03:42,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 478. [2021-06-12 20:03:42,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.157232704402516) internal successors, (1506), 477 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:42,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1506 transitions. [2021-06-12 20:03:42,367 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1506 transitions. Word has length 21 [2021-06-12 20:03:42,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:42,367 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1506 transitions. [2021-06-12 20:03:42,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:42,367 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1506 transitions. [2021-06-12 20:03:42,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:42,368 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:42,368 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:42,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3368,649 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:42,568 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:42,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:42,569 INFO L82 PathProgramCache]: Analyzing trace with hash -103628533, now seen corresponding path program 649 times [2021-06-12 20:03:42,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:42,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998960613] [2021-06-12 20:03:42,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:42,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:42,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:42,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998960613] [2021-06-12 20:03:42,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998960613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:42,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760587714] [2021-06-12 20:03:42,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:42,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:42,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:42,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:42,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:42,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:42,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:42,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:42,772 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:42,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:42,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:42,792 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:46 [2021-06-12 20:03:42,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:42,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:42,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:42,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:42,846 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:42,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:42,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:42,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:42,871 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:42,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:42,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:42,887 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:71, output treesize:19 [2021-06-12 20:03:42,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:42,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760587714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:42,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:42,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:42,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568637319] [2021-06-12 20:03:42,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:42,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:42,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:42,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:42,965 INFO L87 Difference]: Start difference. First operand 478 states and 1506 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:43,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:43,207 INFO L93 Difference]: Finished difference Result 683 states and 2092 transitions. [2021-06-12 20:03:43,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:03:43,207 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:43,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:43,208 INFO L225 Difference]: With dead ends: 683 [2021-06-12 20:03:43,208 INFO L226 Difference]: Without dead ends: 656 [2021-06-12 20:03:43,208 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 268.9ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:03:43,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-06-12 20:03:43,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 489. [2021-06-12 20:03:43,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 3.1598360655737703) internal successors, (1542), 488 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:43,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1542 transitions. [2021-06-12 20:03:43,214 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1542 transitions. Word has length 21 [2021-06-12 20:03:43,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:43,214 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1542 transitions. [2021-06-12 20:03:43,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:43,214 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1542 transitions. [2021-06-12 20:03:43,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:43,214 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:43,214 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:43,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3377,650 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:43,415 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:43,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:43,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1972061257, now seen corresponding path program 650 times [2021-06-12 20:03:43,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:43,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658102126] [2021-06-12 20:03:43,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:43,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:43,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658102126] [2021-06-12 20:03:43,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658102126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:43,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896348017] [2021-06-12 20:03:43,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:43,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:43,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:43,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:43,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:43,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:43,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:43,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:43,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:43,621 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:43,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:43,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:43,641 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:46 [2021-06-12 20:03:43,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:43,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:43,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:43,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:43,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:43,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:43,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:43,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:43,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:43,729 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:10 [2021-06-12 20:03:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:43,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896348017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:43,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:43,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:43,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885400318] [2021-06-12 20:03:43,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:43,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:43,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:43,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:43,776 INFO L87 Difference]: Start difference. First operand 489 states and 1542 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:43,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:43,957 INFO L93 Difference]: Finished difference Result 632 states and 1948 transitions. [2021-06-12 20:03:43,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:43,957 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:43,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:43,958 INFO L225 Difference]: With dead ends: 632 [2021-06-12 20:03:43,958 INFO L226 Difference]: Without dead ends: 611 [2021-06-12 20:03:43,958 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 217.6ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:03:43,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-06-12 20:03:43,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 472. [2021-06-12 20:03:43,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.140127388535032) internal successors, (1479), 471 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:43,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1479 transitions. [2021-06-12 20:03:43,964 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1479 transitions. Word has length 21 [2021-06-12 20:03:43,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:43,964 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1479 transitions. [2021-06-12 20:03:43,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:43,964 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1479 transitions. [2021-06-12 20:03:43,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:43,964 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:43,965 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:44,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3390,651 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:44,165 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:44,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:44,165 INFO L82 PathProgramCache]: Analyzing trace with hash 646367623, now seen corresponding path program 651 times [2021-06-12 20:03:44,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:44,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959597292] [2021-06-12 20:03:44,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:44,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:44,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:44,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959597292] [2021-06-12 20:03:44,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959597292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:44,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194570697] [2021-06-12 20:03:44,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:44,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:03:44,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:44,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:44,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:44,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:44,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:44,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:44,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:44,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:44,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:44,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:44,381 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:41 [2021-06-12 20:03:44,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:44,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:44,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:44,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:44,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:44,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:03:44,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:44,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:44,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:44,518 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:9 [2021-06-12 20:03:44,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:44,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194570697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:44,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:44,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:03:44,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847748916] [2021-06-12 20:03:44,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:03:44,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:44,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:03:44,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:44,526 INFO L87 Difference]: Start difference. First operand 472 states and 1479 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:44,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:44,680 INFO L93 Difference]: Finished difference Result 564 states and 1745 transitions. [2021-06-12 20:03:44,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:44,681 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:44,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:44,681 INFO L225 Difference]: With dead ends: 564 [2021-06-12 20:03:44,681 INFO L226 Difference]: Without dead ends: 542 [2021-06-12 20:03:44,682 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:44,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-12 20:03:44,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 483. [2021-06-12 20:03:44,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 3.1514522821576763) internal successors, (1519), 482 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:44,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1519 transitions. [2021-06-12 20:03:44,686 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1519 transitions. Word has length 21 [2021-06-12 20:03:44,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:44,687 INFO L482 AbstractCegarLoop]: Abstraction has 483 states and 1519 transitions. [2021-06-12 20:03:44,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:44,687 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1519 transitions. [2021-06-12 20:03:44,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:44,687 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:44,687 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:44,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 652 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3395 [2021-06-12 20:03:44,888 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:44,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:44,888 INFO L82 PathProgramCache]: Analyzing trace with hash 144576287, now seen corresponding path program 652 times [2021-06-12 20:03:44,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:44,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957901730] [2021-06-12 20:03:44,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:44,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:44,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957901730] [2021-06-12 20:03:44,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957901730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:44,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318234339] [2021-06-12 20:03:44,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:45,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:45,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:45,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:45,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:45,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:45,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:45,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:45,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:45,085 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:45,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:45,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:45,104 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:41 [2021-06-12 20:03:45,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:45,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:45,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:45,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:45,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:45,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:03:45,188 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:45,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:45,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:45,197 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 20:03:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:45,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318234339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:45,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:45,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:03:45,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905345257] [2021-06-12 20:03:45,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:03:45,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:45,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:03:45,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:45,211 INFO L87 Difference]: Start difference. First operand 483 states and 1519 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:45,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:45,372 INFO L93 Difference]: Finished difference Result 573 states and 1769 transitions. [2021-06-12 20:03:45,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:45,372 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:45,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:45,373 INFO L225 Difference]: With dead ends: 573 [2021-06-12 20:03:45,373 INFO L226 Difference]: Without dead ends: 551 [2021-06-12 20:03:45,373 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 153.9ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:45,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-06-12 20:03:45,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 480. [2021-06-12 20:03:45,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.1461377870563676) internal successors, (1507), 479 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:45,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1507 transitions. [2021-06-12 20:03:45,378 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1507 transitions. Word has length 21 [2021-06-12 20:03:45,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:45,378 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1507 transitions. [2021-06-12 20:03:45,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:45,378 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1507 transitions. [2021-06-12 20:03:45,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:45,379 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:45,379 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:45,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3408,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:45,579 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:45,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:45,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1271691741, now seen corresponding path program 653 times [2021-06-12 20:03:45,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:45,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111681160] [2021-06-12 20:03:45,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:45,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:45,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:45,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:45,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111681160] [2021-06-12 20:03:45,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111681160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:45,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694557830] [2021-06-12 20:03:45,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:45,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:03:45,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:45,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:03:45,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:45,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:45,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:45,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:45,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:45,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:45,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:45,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:45,798 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:45,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:45,802 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:45,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:45,805 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:45,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:45,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:03:45,851 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:143, output treesize:95 [2021-06-12 20:03:46,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:46,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:46,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:46,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:46,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:46,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:46,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:46,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:46,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:46,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 20:03:46,216 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:46,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:46,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:46,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-12 20:03:46,235 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:46,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:46,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:46,252 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:77, output treesize:21 [2021-06-12 20:03:46,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:46,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694557830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:46,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:46,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:46,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753280041] [2021-06-12 20:03:46,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:46,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:46,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:46,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:46,299 INFO L87 Difference]: Start difference. First operand 480 states and 1507 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:46,567 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2021-06-12 20:03:46,965 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-06-12 20:03:47,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:47,049 INFO L93 Difference]: Finished difference Result 740 states and 2266 transitions. [2021-06-12 20:03:47,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:03:47,049 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:47,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:47,050 INFO L225 Difference]: With dead ends: 740 [2021-06-12 20:03:47,050 INFO L226 Difference]: Without dead ends: 702 [2021-06-12 20:03:47,050 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 802.5ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:03:47,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-06-12 20:03:47,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 486. [2021-06-12 20:03:47,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.154639175257732) internal successors, (1530), 485 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:47,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1530 transitions. [2021-06-12 20:03:47,056 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1530 transitions. Word has length 21 [2021-06-12 20:03:47,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:47,056 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1530 transitions. [2021-06-12 20:03:47,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:47,056 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1530 transitions. [2021-06-12 20:03:47,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:47,057 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:47,057 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:47,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3414,654 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:47,257 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:47,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:47,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1049483129, now seen corresponding path program 654 times [2021-06-12 20:03:47,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:47,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134094710] [2021-06-12 20:03:47,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:47,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:47,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:47,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134094710] [2021-06-12 20:03:47,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134094710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:47,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669377139] [2021-06-12 20:03:47,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:47,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:03:47,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:47,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:47,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:47,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:47,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:47,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:47,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:47,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:47,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:39 [2021-06-12 20:03:47,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:03:47,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:47,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:47,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:47,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:47,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:47,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:47,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:47,644 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:47,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:47,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:47,660 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:61, output treesize:5 [2021-06-12 20:03:47,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:47,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669377139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:47,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:47,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:47,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646765101] [2021-06-12 20:03:47,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:47,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:47,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:47,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:47,687 INFO L87 Difference]: Start difference. First operand 486 states and 1530 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:47,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:47,969 INFO L93 Difference]: Finished difference Result 761 states and 2328 transitions. [2021-06-12 20:03:47,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:03:47,970 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:47,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:47,971 INFO L225 Difference]: With dead ends: 761 [2021-06-12 20:03:47,971 INFO L226 Difference]: Without dead ends: 701 [2021-06-12 20:03:47,971 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 214.9ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:47,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-06-12 20:03:47,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 486. [2021-06-12 20:03:47,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.1443298969072164) internal successors, (1525), 485 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:47,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1525 transitions. [2021-06-12 20:03:47,976 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1525 transitions. Word has length 21 [2021-06-12 20:03:47,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:47,976 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1525 transitions. [2021-06-12 20:03:47,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:47,977 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1525 transitions. [2021-06-12 20:03:47,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:47,977 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:47,977 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:48,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3441,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:48,178 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:48,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:48,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1336883715, now seen corresponding path program 655 times [2021-06-12 20:03:48,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:48,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716259187] [2021-06-12 20:03:48,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:48,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:48,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716259187] [2021-06-12 20:03:48,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716259187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:48,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426590001] [2021-06-12 20:03:48,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:48,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:48,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:48,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:48,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:48,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:48,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:48,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:48,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:48,398 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:48,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:48,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:48,417 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:41 [2021-06-12 20:03:48,589 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_181, v_prenex_182], 1=[o_2, o_4]} [2021-06-12 20:03:48,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:48,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:48,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:48,607 INFO L518 ElimStorePlain]: Eliminatee v_prenex_182 vanished before elimination [2021-06-12 20:03:48,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:48,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:48,610 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:48,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:48,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:48,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:48,624 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:48,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:48,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:48,636 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:51, output treesize:13 [2021-06-12 20:03:48,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:48,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426590001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:48,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:48,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:48,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672273578] [2021-06-12 20:03:48,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:48,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:48,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:48,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:48,685 INFO L87 Difference]: Start difference. First operand 486 states and 1525 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:48,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:48,886 INFO L93 Difference]: Finished difference Result 700 states and 2176 transitions. [2021-06-12 20:03:48,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:03:48,886 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:48,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:48,887 INFO L225 Difference]: With dead ends: 700 [2021-06-12 20:03:48,887 INFO L226 Difference]: Without dead ends: 677 [2021-06-12 20:03:48,887 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 260.8ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:48,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-06-12 20:03:48,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 484. [2021-06-12 20:03:48,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.1469979296066253) internal successors, (1520), 483 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:48,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1520 transitions. [2021-06-12 20:03:48,893 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1520 transitions. Word has length 21 [2021-06-12 20:03:48,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:48,893 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1520 transitions. [2021-06-12 20:03:48,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:48,893 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1520 transitions. [2021-06-12 20:03:48,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:48,893 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:48,893 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:49,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3457,656 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:49,094 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:49,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:49,094 INFO L82 PathProgramCache]: Analyzing trace with hash 959955199, now seen corresponding path program 656 times [2021-06-12 20:03:49,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:49,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388172102] [2021-06-12 20:03:49,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:49,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:49,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:49,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388172102] [2021-06-12 20:03:49,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388172102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:49,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995472283] [2021-06-12 20:03:49,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:49,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:49,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:49,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:49,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:49,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:49,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:49,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:49,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:49,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:49,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:49,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:49,341 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:62, output treesize:38 [2021-06-12 20:03:49,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:49,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:49,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:49,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:49,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:49,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:49,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:49,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:49,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:49,444 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:10 [2021-06-12 20:03:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:49,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995472283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:49,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:49,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:49,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712499969] [2021-06-12 20:03:49,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:49,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:49,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:49,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:49,489 INFO L87 Difference]: Start difference. First operand 484 states and 1520 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:49,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:49,682 INFO L93 Difference]: Finished difference Result 669 states and 2069 transitions. [2021-06-12 20:03:49,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:03:49,682 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:49,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:49,683 INFO L225 Difference]: With dead ends: 669 [2021-06-12 20:03:49,683 INFO L226 Difference]: Without dead ends: 650 [2021-06-12 20:03:49,683 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 235.3ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:49,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-06-12 20:03:49,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 480. [2021-06-12 20:03:49,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.139874739039666) internal successors, (1504), 479 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:49,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1504 transitions. [2021-06-12 20:03:49,688 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1504 transitions. Word has length 21 [2021-06-12 20:03:49,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:49,688 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1504 transitions. [2021-06-12 20:03:49,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:49,688 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1504 transitions. [2021-06-12 20:03:49,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:49,689 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:49,689 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:49,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3483 [2021-06-12 20:03:49,889 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:49,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:49,890 INFO L82 PathProgramCache]: Analyzing trace with hash -769006689, now seen corresponding path program 657 times [2021-06-12 20:03:49,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:49,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810023252] [2021-06-12 20:03:49,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:49,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:49,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810023252] [2021-06-12 20:03:49,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810023252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:49,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137826822] [2021-06-12 20:03:49,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:50,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:03:50,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:50,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:50,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:50,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:50,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:50,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:50,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:50,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:50,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:50,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:50,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:50,107 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:41 [2021-06-12 20:03:50,215 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_183, v_prenex_184], 1=[o_2, o_4]} [2021-06-12 20:03:50,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:50,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:50,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:50,231 INFO L518 ElimStorePlain]: Eliminatee v_prenex_184 vanished before elimination [2021-06-12 20:03:50,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:50,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:50,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:50,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:50,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:50,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:03:50,248 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:50,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:50,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:50,259 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:51, output treesize:15 [2021-06-12 20:03:50,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:50,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137826822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:50,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:50,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:03:50,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825953147] [2021-06-12 20:03:50,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:03:50,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:50,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:03:50,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:50,286 INFO L87 Difference]: Start difference. First operand 480 states and 1504 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:50,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:50,480 INFO L93 Difference]: Finished difference Result 609 states and 1884 transitions. [2021-06-12 20:03:50,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:50,481 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:50,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:50,482 INFO L225 Difference]: With dead ends: 609 [2021-06-12 20:03:50,482 INFO L226 Difference]: Without dead ends: 580 [2021-06-12 20:03:50,482 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 166.7ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:50,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-06-12 20:03:50,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 480. [2021-06-12 20:03:50,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.139874739039666) internal successors, (1504), 479 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:50,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1504 transitions. [2021-06-12 20:03:50,487 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1504 transitions. Word has length 21 [2021-06-12 20:03:50,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:50,487 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1504 transitions. [2021-06-12 20:03:50,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:50,487 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1504 transitions. [2021-06-12 20:03:50,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:50,487 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:50,487 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:50,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3488,658 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:50,688 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:50,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:50,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1863705607, now seen corresponding path program 658 times [2021-06-12 20:03:50,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:50,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448034561] [2021-06-12 20:03:50,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:50,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:50,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:50,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448034561] [2021-06-12 20:03:50,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448034561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:50,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005075175] [2021-06-12 20:03:50,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:50,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:50,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:50,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:50,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:50,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:50,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:50,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:50,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:50,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:50,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:36 [2021-06-12 20:03:50,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:50,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:50,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:50,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:50,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:03:50,996 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:51,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:51,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:51,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:51,014 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:51,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:51,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:51,029 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:65, output treesize:13 [2021-06-12 20:03:51,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:51,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005075175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:51,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:51,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:51,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210706371] [2021-06-12 20:03:51,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:51,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:51,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:51,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:51,078 INFO L87 Difference]: Start difference. First operand 480 states and 1504 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:51,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:51,348 INFO L93 Difference]: Finished difference Result 802 states and 2449 transitions. [2021-06-12 20:03:51,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:03:51,348 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:51,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:51,349 INFO L225 Difference]: With dead ends: 802 [2021-06-12 20:03:51,349 INFO L226 Difference]: Without dead ends: 748 [2021-06-12 20:03:51,349 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 270.0ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:03:51,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-06-12 20:03:51,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 481. [2021-06-12 20:03:51,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.160416666666667) internal successors, (1517), 480 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:51,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1517 transitions. [2021-06-12 20:03:51,355 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1517 transitions. Word has length 21 [2021-06-12 20:03:51,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:51,355 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1517 transitions. [2021-06-12 20:03:51,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:51,355 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1517 transitions. [2021-06-12 20:03:51,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:51,356 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:51,356 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:51,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 659 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3507 [2021-06-12 20:03:51,556 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:51,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:51,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1806975925, now seen corresponding path program 659 times [2021-06-12 20:03:51,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:51,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993395118] [2021-06-12 20:03:51,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:51,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:51,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:51,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993395118] [2021-06-12 20:03:51,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993395118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:51,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605756691] [2021-06-12 20:03:51,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:51,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:03:51,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:51,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:51,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:51,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:51,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:51,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:51,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:51,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:51,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:51,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:51,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:51,780 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:41 [2021-06-12 20:03:51,823 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_185, v_prenex_186], 1=[o_2, o_4]} [2021-06-12 20:03:51,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:51,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:51,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:51,841 INFO L518 ElimStorePlain]: Eliminatee v_prenex_186 vanished before elimination [2021-06-12 20:03:51,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:51,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:51,844 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:51,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:51,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:51,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:03:51,860 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:51,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:51,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:51,874 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:59, output treesize:24 [2021-06-12 20:03:51,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:51,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605756691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:51,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:51,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:03:51,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891301658] [2021-06-12 20:03:51,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:03:51,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:51,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:03:51,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:51,909 INFO L87 Difference]: Start difference. First operand 481 states and 1517 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:52,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:52,068 INFO L93 Difference]: Finished difference Result 617 states and 1914 transitions. [2021-06-12 20:03:52,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:52,068 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:52,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:52,069 INFO L225 Difference]: With dead ends: 617 [2021-06-12 20:03:52,069 INFO L226 Difference]: Without dead ends: 588 [2021-06-12 20:03:52,069 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 160.0ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:52,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-12 20:03:52,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 481. [2021-06-12 20:03:52,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.160416666666667) internal successors, (1517), 480 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:52,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1517 transitions. [2021-06-12 20:03:52,074 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1517 transitions. Word has length 21 [2021-06-12 20:03:52,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:52,075 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1517 transitions. [2021-06-12 20:03:52,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:52,075 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1517 transitions. [2021-06-12 20:03:52,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:52,075 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:52,075 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:52,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3522,660 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:52,276 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:52,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:52,276 INFO L82 PathProgramCache]: Analyzing trace with hash 2104242335, now seen corresponding path program 660 times [2021-06-12 20:03:52,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:52,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125437154] [2021-06-12 20:03:52,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:52,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:52,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:52,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125437154] [2021-06-12 20:03:52,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125437154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:52,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564349377] [2021-06-12 20:03:52,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:52,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:03:52,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:52,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:52,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:52,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:52,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:52,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:52,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:52,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:52,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:52,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:52,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:52,508 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:62, output treesize:38 [2021-06-12 20:03:52,570 INFO L446 ElimStorePlain]: Different costs {0=[o_2, o_4], 1=[v_prenex_187, v_prenex_188]} [2021-06-12 20:03:52,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:52,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:52,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:52,587 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:03:52,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:52,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:52,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:52,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:52,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:52,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:52,605 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:52,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:52,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:52,617 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:56, output treesize:19 [2021-06-12 20:03:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:52,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564349377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:52,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:52,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:03:52,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896047984] [2021-06-12 20:03:52,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:03:52,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:52,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:03:52,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:03:52,641 INFO L87 Difference]: Start difference. First operand 481 states and 1517 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:52,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:52,781 INFO L93 Difference]: Finished difference Result 624 states and 1930 transitions. [2021-06-12 20:03:52,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:52,781 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:52,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:52,782 INFO L225 Difference]: With dead ends: 624 [2021-06-12 20:03:52,782 INFO L226 Difference]: Without dead ends: 601 [2021-06-12 20:03:52,782 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 171.5ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:52,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-06-12 20:03:52,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 481. [2021-06-12 20:03:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.160416666666667) internal successors, (1517), 480 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:52,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1517 transitions. [2021-06-12 20:03:52,787 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1517 transitions. Word has length 21 [2021-06-12 20:03:52,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:52,787 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1517 transitions. [2021-06-12 20:03:52,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:52,787 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1517 transitions. [2021-06-12 20:03:52,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:52,788 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:52,788 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:52,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3531,661 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:52,988 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:52,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:52,989 INFO L82 PathProgramCache]: Analyzing trace with hash 815647713, now seen corresponding path program 661 times [2021-06-12 20:03:52,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:52,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614919651] [2021-06-12 20:03:52,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:53,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:53,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614919651] [2021-06-12 20:03:53,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614919651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:53,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010502480] [2021-06-12 20:03:53,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:53,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:53,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:53,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:53,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:53,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:53,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:53,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:53,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:39 [2021-06-12 20:03:53,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:53,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:53,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:53,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:53,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:03:53,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:53,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:53,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:53,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:53,275 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:53,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:53,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:53,297 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:81, output treesize:25 [2021-06-12 20:03:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:53,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010502480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:53,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:53,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:53,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225384166] [2021-06-12 20:03:53,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:53,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:53,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:53,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:53,374 INFO L87 Difference]: Start difference. First operand 481 states and 1517 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:53,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:53,566 INFO L93 Difference]: Finished difference Result 701 states and 2149 transitions. [2021-06-12 20:03:53,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:03:53,567 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:53,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:53,568 INFO L225 Difference]: With dead ends: 701 [2021-06-12 20:03:53,568 INFO L226 Difference]: Without dead ends: 674 [2021-06-12 20:03:53,568 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 252.9ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:03:53,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-06-12 20:03:53,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 476. [2021-06-12 20:03:53,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.1389473684210527) internal successors, (1491), 475 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:53,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1491 transitions. [2021-06-12 20:03:53,573 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1491 transitions. Word has length 21 [2021-06-12 20:03:53,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:53,573 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1491 transitions. [2021-06-12 20:03:53,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:53,573 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1491 transitions. [2021-06-12 20:03:53,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:53,573 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:53,574 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:53,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 662 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3539 [2021-06-12 20:03:53,774 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:53,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:53,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1019504985, now seen corresponding path program 662 times [2021-06-12 20:03:53,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:53,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623806710] [2021-06-12 20:03:53,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:53,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:53,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:53,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:53,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623806710] [2021-06-12 20:03:53,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623806710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:53,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808380115] [2021-06-12 20:03:53,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:53,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:53,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:53,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:53,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:54,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:54,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:54,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:54,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:54,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:54,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-06-12 20:03:54,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:54,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:54,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:54,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:54,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:54,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:54,057 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:54,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:54,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:54,064 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:10 [2021-06-12 20:03:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:54,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808380115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:54,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:54,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:03:54,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331907020] [2021-06-12 20:03:54,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:03:54,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:54,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:03:54,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:54,077 INFO L87 Difference]: Start difference. First operand 476 states and 1491 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:54,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:54,247 INFO L93 Difference]: Finished difference Result 557 states and 1723 transitions. [2021-06-12 20:03:54,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:54,248 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:54,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:54,248 INFO L225 Difference]: With dead ends: 557 [2021-06-12 20:03:54,248 INFO L226 Difference]: Without dead ends: 538 [2021-06-12 20:03:54,248 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 169.0ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:54,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-12 20:03:54,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 476. [2021-06-12 20:03:54,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.1389473684210527) internal successors, (1491), 475 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:54,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1491 transitions. [2021-06-12 20:03:54,255 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1491 transitions. Word has length 21 [2021-06-12 20:03:54,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:54,255 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1491 transitions. [2021-06-12 20:03:54,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:54,255 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1491 transitions. [2021-06-12 20:03:54,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:54,255 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:54,255 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:54,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3549,663 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:54,456 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:54,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:54,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1217251335, now seen corresponding path program 663 times [2021-06-12 20:03:54,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:54,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576393084] [2021-06-12 20:03:54,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:54,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:54,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576393084] [2021-06-12 20:03:54,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576393084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:54,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10289065] [2021-06-12 20:03:54,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:54,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:03:54,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:54,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:54,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:54,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:54,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:54,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:54,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:54,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:54,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:28 [2021-06-12 20:03:54,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:03:54,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:54,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:54,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:03:54,719 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:54,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:54,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:54,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:03:54,736 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:54,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:54,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:54,751 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:15 [2021-06-12 20:03:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:54,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10289065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:54,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:54,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:03:54,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093955306] [2021-06-12 20:03:54,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:03:54,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:54,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:03:54,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:54,769 INFO L87 Difference]: Start difference. First operand 476 states and 1491 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:54,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:54,926 INFO L93 Difference]: Finished difference Result 578 states and 1785 transitions. [2021-06-12 20:03:54,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:54,926 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:54,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:54,927 INFO L225 Difference]: With dead ends: 578 [2021-06-12 20:03:54,927 INFO L226 Difference]: Without dead ends: 542 [2021-06-12 20:03:54,927 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 150.1ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:54,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-12 20:03:54,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 476. [2021-06-12 20:03:54,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.1389473684210527) internal successors, (1491), 475 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:54,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1491 transitions. [2021-06-12 20:03:54,932 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1491 transitions. Word has length 21 [2021-06-12 20:03:54,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:54,932 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1491 transitions. [2021-06-12 20:03:54,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:54,932 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1491 transitions. [2021-06-12 20:03:54,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:54,932 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:54,932 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:55,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3552,664 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:55,133 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:55,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:55,133 INFO L82 PathProgramCache]: Analyzing trace with hash 122552417, now seen corresponding path program 664 times [2021-06-12 20:03:55,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:55,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66378035] [2021-06-12 20:03:55,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:55,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:55,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66378035] [2021-06-12 20:03:55,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66378035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:55,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684481798] [2021-06-12 20:03:55,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:55,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:55,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:55,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:55,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:55,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:55,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:55,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:55,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:55,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:55,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:55,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:55,368 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:51, output treesize:32 [2021-06-12 20:03:55,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:55,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:55,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:55,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:55,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:55,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:55,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:55,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:55,427 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:55,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:55,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:55,440 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:60, output treesize:13 [2021-06-12 20:03:55,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:55,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684481798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:55,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:55,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:03:55,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903346865] [2021-06-12 20:03:55,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:03:55,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:55,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:03:55,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:55,471 INFO L87 Difference]: Start difference. First operand 476 states and 1491 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:55,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:55,665 INFO L93 Difference]: Finished difference Result 619 states and 1904 transitions. [2021-06-12 20:03:55,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:55,665 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:55,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:55,666 INFO L225 Difference]: With dead ends: 619 [2021-06-12 20:03:55,667 INFO L226 Difference]: Without dead ends: 592 [2021-06-12 20:03:55,667 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 199.7ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:55,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-12 20:03:55,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 491. [2021-06-12 20:03:55,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.136734693877551) internal successors, (1537), 490 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:55,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1537 transitions. [2021-06-12 20:03:55,674 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1537 transitions. Word has length 21 [2021-06-12 20:03:55,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:55,674 INFO L482 AbstractCegarLoop]: Abstraction has 491 states and 1537 transitions. [2021-06-12 20:03:55,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:55,674 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1537 transitions. [2021-06-12 20:03:55,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:55,681 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:55,681 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:55,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 665 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3562 [2021-06-12 20:03:55,897 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:55,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:55,897 INFO L82 PathProgramCache]: Analyzing trace with hash 2003305355, now seen corresponding path program 665 times [2021-06-12 20:03:55,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:55,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661544824] [2021-06-12 20:03:55,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:55,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:55,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:55,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:55,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661544824] [2021-06-12 20:03:55,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661544824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:55,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26653837] [2021-06-12 20:03:55,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:56,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:03:56,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:56,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:03:56,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:56,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:56,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:56,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:56,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:56,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:56,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:56,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:56,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:56,138 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:51, output treesize:32 [2021-06-12 20:03:56,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:56,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:56,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:56,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:56,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:56,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:56,196 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:56,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:56,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:56,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:56,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:56,231 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:56,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:56,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:56,234 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:56,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:56,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:56,262 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:81, output treesize:25 [2021-06-12 20:03:56,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:56,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26653837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:56,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:56,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:56,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291430192] [2021-06-12 20:03:56,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:56,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:56,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:56,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:56,324 INFO L87 Difference]: Start difference. First operand 491 states and 1537 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:56,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:56,629 INFO L93 Difference]: Finished difference Result 569 states and 1751 transitions. [2021-06-12 20:03:56,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:56,629 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:56,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:56,630 INFO L225 Difference]: With dead ends: 569 [2021-06-12 20:03:56,630 INFO L226 Difference]: Without dead ends: 548 [2021-06-12 20:03:56,630 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 255.6ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:03:56,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-06-12 20:03:56,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 473. [2021-06-12 20:03:56,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.141949152542373) internal successors, (1483), 472 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:56,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1483 transitions. [2021-06-12 20:03:56,635 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1483 transitions. Word has length 21 [2021-06-12 20:03:56,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:56,635 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1483 transitions. [2021-06-12 20:03:56,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:56,635 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1483 transitions. [2021-06-12 20:03:56,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:56,636 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:56,636 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:56,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3576,666 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:56,836 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:56,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:56,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1639368899, now seen corresponding path program 666 times [2021-06-12 20:03:56,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:56,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362652434] [2021-06-12 20:03:56,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:56,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:56,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:56,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362652434] [2021-06-12 20:03:56,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362652434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:56,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121716781] [2021-06-12 20:03:56,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:56,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:03:56,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:56,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:56,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:57,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:57,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:57,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:57,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:57,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:33 [2021-06-12 20:03:57,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:03:57,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:57,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:03:57,085 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:57,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:57,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:03:57,105 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:57,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:57,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:57,122 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:67, output treesize:24 [2021-06-12 20:03:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:57,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121716781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:57,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:57,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:03:57,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931004197] [2021-06-12 20:03:57,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:03:57,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:57,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:03:57,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:57,157 INFO L87 Difference]: Start difference. First operand 473 states and 1483 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:57,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:57,314 INFO L93 Difference]: Finished difference Result 593 states and 1825 transitions. [2021-06-12 20:03:57,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:57,314 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:57,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:57,315 INFO L225 Difference]: With dead ends: 593 [2021-06-12 20:03:57,315 INFO L226 Difference]: Without dead ends: 557 [2021-06-12 20:03:57,315 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:57,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-06-12 20:03:57,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 474. [2021-06-12 20:03:57,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.145877378435518) internal successors, (1488), 473 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:57,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1488 transitions. [2021-06-12 20:03:57,321 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1488 transitions. Word has length 21 [2021-06-12 20:03:57,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:57,322 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1488 transitions. [2021-06-12 20:03:57,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:57,322 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1488 transitions. [2021-06-12 20:03:57,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:57,322 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:57,322 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:57,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3586,667 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:57,537 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:57,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:57,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1342102489, now seen corresponding path program 667 times [2021-06-12 20:03:57,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:57,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874087226] [2021-06-12 20:03:57,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:57,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:57,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:57,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874087226] [2021-06-12 20:03:57,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874087226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:57,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617801884] [2021-06-12 20:03:57,627 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:57,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:57,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:57,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:57,727 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[v_prenex_189]} [2021-06-12 20:03:57,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:57,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:57,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:57,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:57,747 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:57,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:57,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:57,760 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:36 [2021-06-12 20:03:57,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:57,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:57,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:57,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:57,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:57,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:57,825 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:57,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:57,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:57,840 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:64, output treesize:19 [2021-06-12 20:03:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:57,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617801884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:57,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:57,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:03:57,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945388647] [2021-06-12 20:03:57,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:03:57,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:57,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:03:57,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:03:57,864 INFO L87 Difference]: Start difference. First operand 474 states and 1488 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:58,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:58,018 INFO L93 Difference]: Finished difference Result 678 states and 2077 transitions. [2021-06-12 20:03:58,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:03:58,019 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:58,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:58,020 INFO L225 Difference]: With dead ends: 678 [2021-06-12 20:03:58,020 INFO L226 Difference]: Without dead ends: 655 [2021-06-12 20:03:58,020 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 156.5ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:03:58,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-06-12 20:03:58,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 489. [2021-06-12 20:03:58,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 3.1618852459016393) internal successors, (1543), 488 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:58,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1543 transitions. [2021-06-12 20:03:58,025 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1543 transitions. Word has length 21 [2021-06-12 20:03:58,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:58,025 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1543 transitions. [2021-06-12 20:03:58,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:58,025 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1543 transitions. [2021-06-12 20:03:58,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:58,026 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:58,026 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:58,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 668 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3592 [2021-06-12 20:03:58,227 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:58,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:58,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1626365173, now seen corresponding path program 668 times [2021-06-12 20:03:58,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:58,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038444438] [2021-06-12 20:03:58,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:58,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:58,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:58,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038444438] [2021-06-12 20:03:58,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038444438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:58,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577015446] [2021-06-12 20:03:58,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:58,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:58,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:58,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:58,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:58,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:58,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:58,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:58,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:58,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:58,428 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:58,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:58,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:58,444 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:42 [2021-06-12 20:03:58,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:58,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:58,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:58,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:58,501 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:58,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:58,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:58,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:58,519 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:58,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:58,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:58,535 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:70, output treesize:19 [2021-06-12 20:03:58,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:58,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577015446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:58,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:58,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:58,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320352189] [2021-06-12 20:03:58,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:58,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:58,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:58,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:58,611 INFO L87 Difference]: Start difference. First operand 489 states and 1543 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:58,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:58,802 INFO L93 Difference]: Finished difference Result 723 states and 2212 transitions. [2021-06-12 20:03:58,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:03:58,802 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:58,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:58,803 INFO L225 Difference]: With dead ends: 723 [2021-06-12 20:03:58,803 INFO L226 Difference]: Without dead ends: 696 [2021-06-12 20:03:58,803 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 259.1ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:03:58,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-06-12 20:03:58,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 507. [2021-06-12 20:03:58,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.1679841897233203) internal successors, (1603), 506 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:58,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1603 transitions. [2021-06-12 20:03:58,809 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1603 transitions. Word has length 21 [2021-06-12 20:03:58,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:58,809 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1603 transitions. [2021-06-12 20:03:58,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:58,809 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1603 transitions. [2021-06-12 20:03:58,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:58,810 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:58,810 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:59,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 669 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3600 [2021-06-12 20:03:59,010 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:59,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:59,010 INFO L82 PathProgramCache]: Analyzing trace with hash 707855157, now seen corresponding path program 669 times [2021-06-12 20:03:59,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:59,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156782631] [2021-06-12 20:03:59,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:59,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:59,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:59,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156782631] [2021-06-12 20:03:59,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156782631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:59,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78348888] [2021-06-12 20:03:59,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:59,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:03:59,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:59,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:59,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:59,249 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[v_prenex_190]} [2021-06-12 20:03:59,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:03:59,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:59,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:59,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:59,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:59,269 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:59,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:59,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:03:59,282 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:36 [2021-06-12 20:03:59,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:59,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:59,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:59,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:59,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:59,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:03:59,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:59,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:59,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:59,362 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:10 [2021-06-12 20:03:59,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:59,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78348888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:59,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:59,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:59,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032007780] [2021-06-12 20:03:59,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:59,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:59,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:59,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:59,409 INFO L87 Difference]: Start difference. First operand 507 states and 1603 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:59,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:59,616 INFO L93 Difference]: Finished difference Result 699 states and 2157 transitions. [2021-06-12 20:03:59,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:03:59,616 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:03:59,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:59,617 INFO L225 Difference]: With dead ends: 699 [2021-06-12 20:03:59,617 INFO L226 Difference]: Without dead ends: 680 [2021-06-12 20:03:59,617 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 280.1ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:59,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-06-12 20:03:59,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 493. [2021-06-12 20:03:59,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.158536585365854) internal successors, (1554), 492 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:59,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1554 transitions. [2021-06-12 20:03:59,622 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1554 transitions. Word has length 21 [2021-06-12 20:03:59,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:59,622 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1554 transitions. [2021-06-12 20:03:59,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:59,622 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1554 transitions. [2021-06-12 20:03:59,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:03:59,623 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:59,623 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:59,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3612,670 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:59,823 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:59,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:59,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1253227811, now seen corresponding path program 670 times [2021-06-12 20:03:59,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:59,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986150451] [2021-06-12 20:03:59,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:59,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:59,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:59,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986150451] [2021-06-12 20:03:59,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986150451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:59,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415120949] [2021-06-12 20:03:59,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:59,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:59,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:59,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:03:59,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:00,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:00,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:00,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:00,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:00,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:00,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:00,026 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:42 [2021-06-12 20:04:00,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:00,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:00,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:00,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:00,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:00,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:00,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:00,176 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:35, output treesize:7 [2021-06-12 20:04:00,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:00,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415120949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:00,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:00,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:04:00,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855142195] [2021-06-12 20:04:00,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:04:00,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:00,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:04:00,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:00,187 INFO L87 Difference]: Start difference. First operand 493 states and 1554 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:00,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:00,328 INFO L93 Difference]: Finished difference Result 600 states and 1840 transitions. [2021-06-12 20:04:00,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:00,328 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:00,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:00,329 INFO L225 Difference]: With dead ends: 600 [2021-06-12 20:04:00,329 INFO L226 Difference]: Without dead ends: 579 [2021-06-12 20:04:00,329 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 214.7ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:04:00,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-12 20:04:00,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 489. [2021-06-12 20:04:00,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 3.1598360655737703) internal successors, (1542), 488 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:00,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1542 transitions. [2021-06-12 20:04:00,334 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1542 transitions. Word has length 21 [2021-06-12 20:04:00,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:00,334 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1542 transitions. [2021-06-12 20:04:00,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:00,335 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1542 transitions. [2021-06-12 20:04:00,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:00,335 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:00,335 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:00,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3617,671 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:00,536 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:00,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:00,536 INFO L82 PathProgramCache]: Analyzing trace with hash -465756871, now seen corresponding path program 671 times [2021-06-12 20:04:00,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:00,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36940816] [2021-06-12 20:04:00,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:00,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:00,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36940816] [2021-06-12 20:04:00,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36940816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:00,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026694047] [2021-06-12 20:04:00,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:00,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:04:00,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:00,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:00,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:00,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:00,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:00,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:00,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:00,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:00,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:00,731 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:42 [2021-06-12 20:04:00,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:00,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:00,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:00,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:00,803 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:00,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:00,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:00,810 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:10 [2021-06-12 20:04:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:00,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026694047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:00,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:00,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:00,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768955589] [2021-06-12 20:04:00,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:00,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:00,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:00,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:00,857 INFO L87 Difference]: Start difference. First operand 489 states and 1542 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:01,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:01,038 INFO L93 Difference]: Finished difference Result 638 states and 1965 transitions. [2021-06-12 20:04:01,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:01,039 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:01,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:01,039 INFO L225 Difference]: With dead ends: 638 [2021-06-12 20:04:01,039 INFO L226 Difference]: Without dead ends: 617 [2021-06-12 20:04:01,040 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 202.6ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:04:01,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-06-12 20:04:01,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 472. [2021-06-12 20:04:01,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.140127388535032) internal successors, (1479), 471 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:01,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1479 transitions. [2021-06-12 20:04:01,045 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1479 transitions. Word has length 21 [2021-06-12 20:04:01,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:01,045 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1479 transitions. [2021-06-12 20:04:01,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:01,045 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1479 transitions. [2021-06-12 20:04:01,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:01,045 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:01,045 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:01,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3631,672 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:01,246 INFO L430 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:01,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:01,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1629097049, now seen corresponding path program 672 times [2021-06-12 20:04:01,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:01,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128718902] [2021-06-12 20:04:01,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:01,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:01,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:01,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128718902] [2021-06-12 20:04:01,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128718902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:01,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216448890] [2021-06-12 20:04:01,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:01,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:04:01,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:01,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:01,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:01,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:01,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:01,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:01,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:01,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:01,422 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:01,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:01,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:01,436 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:04:01,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:01,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:01,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:01,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:01,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:01,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:04:01,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:01,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:01,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:01,518 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:12 [2021-06-12 20:04:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:01,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216448890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:01,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:01,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:04:01,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910481131] [2021-06-12 20:04:01,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:04:01,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:01,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:04:01,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:01,532 INFO L87 Difference]: Start difference. First operand 472 states and 1479 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:01,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:01,676 INFO L93 Difference]: Finished difference Result 557 states and 1724 transitions. [2021-06-12 20:04:01,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:01,676 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:01,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:01,677 INFO L225 Difference]: With dead ends: 557 [2021-06-12 20:04:01,677 INFO L226 Difference]: Without dead ends: 535 [2021-06-12 20:04:01,677 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 141.3ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:01,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-12 20:04:01,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 478. [2021-06-12 20:04:01,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.1446540880503147) internal successors, (1500), 477 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:01,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1500 transitions. [2021-06-12 20:04:01,682 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1500 transitions. Word has length 21 [2021-06-12 20:04:01,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:01,682 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1500 transitions. [2021-06-12 20:04:01,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:01,682 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1500 transitions. [2021-06-12 20:04:01,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:01,682 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:01,682 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:01,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3635,673 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:01,883 INFO L430 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:01,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:01,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1003772931, now seen corresponding path program 673 times [2021-06-12 20:04:01,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:01,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622411995] [2021-06-12 20:04:01,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:01,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:01,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:01,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622411995] [2021-06-12 20:04:01,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622411995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:01,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919303613] [2021-06-12 20:04:01,961 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:01,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:01,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:01,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:02,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:02,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:02,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:02,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:02,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:02,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 20:04:02,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:04:02,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:02,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:02,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:02,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:02,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:02,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:02,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:02,146 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:02,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:02,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:02,160 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:13 [2021-06-12 20:04:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:02,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919303613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:02,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:02,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:04:02,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389585079] [2021-06-12 20:04:02,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:04:02,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:02,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:04:02,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:02,188 INFO L87 Difference]: Start difference. First operand 478 states and 1500 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:02,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:02,362 INFO L93 Difference]: Finished difference Result 573 states and 1771 transitions. [2021-06-12 20:04:02,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:02,362 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:02,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:02,363 INFO L225 Difference]: With dead ends: 573 [2021-06-12 20:04:02,363 INFO L226 Difference]: Without dead ends: 546 [2021-06-12 20:04:02,363 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:02,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-12 20:04:02,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 478. [2021-06-12 20:04:02,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.140461215932914) internal successors, (1498), 477 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:02,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1498 transitions. [2021-06-12 20:04:02,368 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1498 transitions. Word has length 21 [2021-06-12 20:04:02,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:02,368 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1498 transitions. [2021-06-12 20:04:02,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:02,368 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1498 transitions. [2021-06-12 20:04:02,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:02,369 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:02,369 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:02,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3642,674 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:02,569 INFO L430 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:02,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:02,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1288035615, now seen corresponding path program 674 times [2021-06-12 20:04:02,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:02,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122845152] [2021-06-12 20:04:02,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:02,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:02,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:02,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122845152] [2021-06-12 20:04:02,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122845152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:02,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577057632] [2021-06-12 20:04:02,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:02,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:02,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:02,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:02,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:02,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:02,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:02,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:02,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:02,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:02,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:02,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:02,770 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:04:02,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:02,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:02,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:02,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:02,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:02,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:02,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:02,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:02,881 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:02,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:02,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:02,896 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:13 [2021-06-12 20:04:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:02,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577057632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:02,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:02,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:02,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291561565] [2021-06-12 20:04:02,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:02,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:02,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:02,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:02,948 INFO L87 Difference]: Start difference. First operand 478 states and 1498 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:03,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:03,137 INFO L93 Difference]: Finished difference Result 679 states and 2088 transitions. [2021-06-12 20:04:03,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:03,137 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:03,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:03,138 INFO L225 Difference]: With dead ends: 679 [2021-06-12 20:04:03,138 INFO L226 Difference]: Without dead ends: 652 [2021-06-12 20:04:03,138 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 218.2ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:04:03,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-12 20:04:03,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 492. [2021-06-12 20:04:03,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 3.1384928716904277) internal successors, (1541), 491 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:03,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1541 transitions. [2021-06-12 20:04:03,144 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1541 transitions. Word has length 21 [2021-06-12 20:04:03,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:03,144 INFO L482 AbstractCegarLoop]: Abstraction has 492 states and 1541 transitions. [2021-06-12 20:04:03,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:03,144 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1541 transitions. [2021-06-12 20:04:03,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:03,145 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:03,145 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:03,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3652,675 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:03,345 INFO L430 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:03,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:03,345 INFO L82 PathProgramCache]: Analyzing trace with hash 398356225, now seen corresponding path program 675 times [2021-06-12 20:04:03,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:03,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431866452] [2021-06-12 20:04:03,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:03,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:03,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:03,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431866452] [2021-06-12 20:04:03,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431866452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:03,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245470450] [2021-06-12 20:04:03,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:03,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:04:03,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:03,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:03,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:03,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:03,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:03,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:03,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:03,533 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:03,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:03,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:03,552 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:04:03,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:03,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:03,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:03,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:03,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:03,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:03,675 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:03,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:03,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:03,682 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:7 [2021-06-12 20:04:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:03,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245470450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:03,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:03,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:04:03,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579179713] [2021-06-12 20:04:03,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:04:03,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:03,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:04:03,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:03,694 INFO L87 Difference]: Start difference. First operand 492 states and 1541 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:03,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:03,834 INFO L93 Difference]: Finished difference Result 579 states and 1779 transitions. [2021-06-12 20:04:03,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:03,834 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:03,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:03,835 INFO L225 Difference]: With dead ends: 579 [2021-06-12 20:04:03,835 INFO L226 Difference]: Without dead ends: 558 [2021-06-12 20:04:03,835 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 203.4ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:04:03,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-12 20:04:03,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 493. [2021-06-12 20:04:03,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.1463414634146343) internal successors, (1548), 492 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:03,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1548 transitions. [2021-06-12 20:04:03,840 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1548 transitions. Word has length 21 [2021-06-12 20:04:03,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:03,840 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1548 transitions. [2021-06-12 20:04:03,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:03,840 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1548 transitions. [2021-06-12 20:04:03,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:03,841 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:03,841 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:04,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3664,676 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:04,041 INFO L430 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:04,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:04,042 INFO L82 PathProgramCache]: Analyzing trace with hash 420860597, now seen corresponding path program 676 times [2021-06-12 20:04:04,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:04,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508299314] [2021-06-12 20:04:04,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:04,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:04,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:04,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508299314] [2021-06-12 20:04:04,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508299314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:04,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705607088] [2021-06-12 20:04:04,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:04,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:04,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:04,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:04,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:04,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:04,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:04,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:04,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:04,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:04,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:04,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:04,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:04,233 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:04:04,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:04,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:04,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:04,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:04,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:04,280 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:04,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:04,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:04,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:04:04,301 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:04,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:04,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:04,318 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:65, output treesize:21 [2021-06-12 20:04:04,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:04,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705607088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:04,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:04,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:04:04,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539397720] [2021-06-12 20:04:04,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:04:04,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:04,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:04:04,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:04,354 INFO L87 Difference]: Start difference. First operand 493 states and 1548 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:04,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:04,515 INFO L93 Difference]: Finished difference Result 619 states and 1919 transitions. [2021-06-12 20:04:04,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:04,515 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:04,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:04,516 INFO L225 Difference]: With dead ends: 619 [2021-06-12 20:04:04,516 INFO L226 Difference]: Without dead ends: 590 [2021-06-12 20:04:04,516 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 140.9ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:04,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-06-12 20:04:04,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 493. [2021-06-12 20:04:04,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.1463414634146343) internal successors, (1548), 492 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:04,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1548 transitions. [2021-06-12 20:04:04,522 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1548 transitions. Word has length 21 [2021-06-12 20:04:04,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:04,522 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1548 transitions. [2021-06-12 20:04:04,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:04,522 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1548 transitions. [2021-06-12 20:04:04,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:04,522 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:04,522 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:04,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3674,677 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:04,723 INFO L430 AbstractCegarLoop]: === Iteration 689 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:04,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:04,723 INFO L82 PathProgramCache]: Analyzing trace with hash 718127007, now seen corresponding path program 677 times [2021-06-12 20:04:04,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:04,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052182467] [2021-06-12 20:04:04,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:04,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:04,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052182467] [2021-06-12 20:04:04,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052182467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:04,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112509728] [2021-06-12 20:04:04,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:04,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:04:04,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:04,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:04:04,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:04,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:04,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:04,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:04,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:04,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:04,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:04,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:04,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:04,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:04,926 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-06-12 20:04:05,016 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-12 20:04:05,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:05,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:05,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:05,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:05,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:04:05,024 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:05,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:04:05,028 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:05,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:05,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:05,031 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:05,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:05,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:05,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:05,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:05,082 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:05,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:05,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:05,085 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:05,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:05,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:04:05,133 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:153, output treesize:57 [2021-06-12 20:04:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:05,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112509728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:05,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:05,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:05,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479690745] [2021-06-12 20:04:05,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:05,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:05,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:05,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:05,256 INFO L87 Difference]: Start difference. First operand 493 states and 1548 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:05,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:05,712 INFO L93 Difference]: Finished difference Result 703 states and 2169 transitions. [2021-06-12 20:04:05,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:04:05,712 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:05,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:05,713 INFO L225 Difference]: With dead ends: 703 [2021-06-12 20:04:05,713 INFO L226 Difference]: Without dead ends: 661 [2021-06-12 20:04:05,713 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 473.1ms TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:04:05,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-06-12 20:04:05,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 492. [2021-06-12 20:04:05,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 3.1547861507128308) internal successors, (1549), 491 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:05,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1549 transitions. [2021-06-12 20:04:05,719 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1549 transitions. Word has length 21 [2021-06-12 20:04:05,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:05,719 INFO L482 AbstractCegarLoop]: Abstraction has 492 states and 1549 transitions. [2021-06-12 20:04:05,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:05,719 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1549 transitions. [2021-06-12 20:04:05,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:05,719 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:05,719 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:05,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 678 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3683 [2021-06-12 20:04:05,920 INFO L430 AbstractCegarLoop]: === Iteration 690 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:05,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:05,920 INFO L82 PathProgramCache]: Analyzing trace with hash 433864323, now seen corresponding path program 678 times [2021-06-12 20:04:05,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:05,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634276891] [2021-06-12 20:04:05,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:06,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:06,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634276891] [2021-06-12 20:04:06,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634276891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:06,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612088549] [2021-06-12 20:04:06,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:06,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:04:06,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:06,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:06,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:06,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:06,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:06,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:06,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:06,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:06,109 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:06,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:06,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:06,128 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:04:06,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:06,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:06,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:06,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:06,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:06,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:06,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:06,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:06,197 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:06,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:06,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:06,214 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:67, output treesize:19 [2021-06-12 20:04:06,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:06,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612088549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:06,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:06,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:06,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82229280] [2021-06-12 20:04:06,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:06,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:06,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:06,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:06,289 INFO L87 Difference]: Start difference. First operand 492 states and 1549 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:06,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:06,453 INFO L93 Difference]: Finished difference Result 703 states and 2150 transitions. [2021-06-12 20:04:06,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:06,453 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:06,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:06,454 INFO L225 Difference]: With dead ends: 703 [2021-06-12 20:04:06,454 INFO L226 Difference]: Without dead ends: 676 [2021-06-12 20:04:06,454 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 213.8ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:04:06,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-06-12 20:04:06,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 495. [2021-06-12 20:04:06,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 3.1639676113360324) internal successors, (1563), 494 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:06,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1563 transitions. [2021-06-12 20:04:06,459 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1563 transitions. Word has length 21 [2021-06-12 20:04:06,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:06,459 INFO L482 AbstractCegarLoop]: Abstraction has 495 states and 1563 transitions. [2021-06-12 20:04:06,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:06,460 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1563 transitions. [2021-06-12 20:04:06,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:06,460 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:06,460 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:06,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3695,679 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:06,661 INFO L430 AbstractCegarLoop]: === Iteration 691 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:06,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:06,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1785413183, now seen corresponding path program 679 times [2021-06-12 20:04:06,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:06,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326818076] [2021-06-12 20:04:06,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:06,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:06,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:06,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326818076] [2021-06-12 20:04:06,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326818076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:06,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907849836] [2021-06-12 20:04:06,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:06,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:06,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:06,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:06,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:06,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:06,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:06,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:06,836 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:06,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:06,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:06,856 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:04:06,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:06,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:06,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:06,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:06,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:06,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:06,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:06,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:06,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:06,942 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:10 [2021-06-12 20:04:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:06,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907849836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:06,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:06,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:04:06,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738163772] [2021-06-12 20:04:06,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:04:06,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:06,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:04:06,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:06,958 INFO L87 Difference]: Start difference. First operand 495 states and 1563 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:07,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:07,104 INFO L93 Difference]: Finished difference Result 596 states and 1840 transitions. [2021-06-12 20:04:07,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:07,105 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:07,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:07,106 INFO L225 Difference]: With dead ends: 596 [2021-06-12 20:04:07,106 INFO L226 Difference]: Without dead ends: 575 [2021-06-12 20:04:07,106 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 153.3ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:07,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-06-12 20:04:07,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 491. [2021-06-12 20:04:07,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.1551020408163266) internal successors, (1546), 490 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:07,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1546 transitions. [2021-06-12 20:04:07,111 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1546 transitions. Word has length 21 [2021-06-12 20:04:07,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:07,111 INFO L482 AbstractCegarLoop]: Abstraction has 491 states and 1546 transitions. [2021-06-12 20:04:07,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:07,111 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1546 transitions. [2021-06-12 20:04:07,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:07,112 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:07,112 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:07,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 680 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3707 [2021-06-12 20:04:07,312 INFO L430 AbstractCegarLoop]: === Iteration 692 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:07,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:07,312 INFO L82 PathProgramCache]: Analyzing trace with hash 2118105541, now seen corresponding path program 680 times [2021-06-12 20:04:07,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:07,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981332444] [2021-06-12 20:04:07,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:07,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:07,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:07,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981332444] [2021-06-12 20:04:07,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981332444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:07,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772313137] [2021-06-12 20:04:07,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:07,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:07,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:07,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:07,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:07,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:07,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:07,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:07,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:07,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:07,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:31 [2021-06-12 20:04:07,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:04:07,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:07,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:07,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:04:07,529 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:07,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:07,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:07,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:04:07,550 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:07,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:07,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:07,569 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:65, output treesize:21 [2021-06-12 20:04:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:07,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772313137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:07,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:07,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:04:07,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793000530] [2021-06-12 20:04:07,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:04:07,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:07,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:04:07,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:07,604 INFO L87 Difference]: Start difference. First operand 491 states and 1546 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:07,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:07,749 INFO L93 Difference]: Finished difference Result 593 states and 1840 transitions. [2021-06-12 20:04:07,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:07,750 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:07,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:07,750 INFO L225 Difference]: With dead ends: 593 [2021-06-12 20:04:07,750 INFO L226 Difference]: Without dead ends: 557 [2021-06-12 20:04:07,751 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 134.9ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:07,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-06-12 20:04:07,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 492. [2021-06-12 20:04:07,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 3.158859470468432) internal successors, (1551), 491 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:07,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1551 transitions. [2021-06-12 20:04:07,756 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1551 transitions. Word has length 21 [2021-06-12 20:04:07,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:07,756 INFO L482 AbstractCegarLoop]: Abstraction has 492 states and 1551 transitions. [2021-06-12 20:04:07,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:07,756 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1551 transitions. [2021-06-12 20:04:07,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:07,756 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:07,756 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:07,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3711,681 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:07,957 INFO L430 AbstractCegarLoop]: === Iteration 693 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:07,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:07,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1879595345, now seen corresponding path program 681 times [2021-06-12 20:04:07,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:07,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94930613] [2021-06-12 20:04:07,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:08,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:08,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:08,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94930613] [2021-06-12 20:04:08,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94930613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:08,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173974520] [2021-06-12 20:04:08,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:08,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:04:08,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:08,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:08,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:08,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:08,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:08,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:08,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:08,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:08,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:08,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:08,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:08,194 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:04:08,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:08,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:08,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:08,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:08,260 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:08,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:08,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:08,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:08,281 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:08,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:08,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:08,299 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:65, output treesize:19 [2021-06-12 20:04:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:08,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173974520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:08,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:08,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:08,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551945868] [2021-06-12 20:04:08,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:08,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:08,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:08,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:08,371 INFO L87 Difference]: Start difference. First operand 492 states and 1551 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:08,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:08,632 INFO L93 Difference]: Finished difference Result 704 states and 2171 transitions. [2021-06-12 20:04:08,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:04:08,632 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:08,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:08,633 INFO L225 Difference]: With dead ends: 704 [2021-06-12 20:04:08,633 INFO L226 Difference]: Without dead ends: 681 [2021-06-12 20:04:08,633 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 271.2ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:04:08,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-06-12 20:04:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 507. [2021-06-12 20:04:08,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.1739130434782608) internal successors, (1606), 506 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:08,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1606 transitions. [2021-06-12 20:04:08,638 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1606 transitions. Word has length 21 [2021-06-12 20:04:08,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:08,638 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1606 transitions. [2021-06-12 20:04:08,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:08,638 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1606 transitions. [2021-06-12 20:04:08,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:08,639 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:08,639 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:08,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 682 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3717 [2021-06-12 20:04:08,839 INFO L430 AbstractCegarLoop]: === Iteration 694 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:08,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:08,840 INFO L82 PathProgramCache]: Analyzing trace with hash 2131109267, now seen corresponding path program 682 times [2021-06-12 20:04:08,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:08,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201607562] [2021-06-12 20:04:08,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:08,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:08,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:08,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201607562] [2021-06-12 20:04:08,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201607562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:08,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187728275] [2021-06-12 20:04:08,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:08,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:08,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:08,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:08,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:09,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:09,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:09,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:09,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:09,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:09,017 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:09,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:09,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:09,036 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:04:09,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:09,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:09,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:09,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:09,082 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:09,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:09,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:09,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:09,102 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:09,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:09,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:09,118 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:67, output treesize:19 [2021-06-12 20:04:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:09,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187728275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:09,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:09,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:09,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072024107] [2021-06-12 20:04:09,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:09,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:09,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:09,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:09,195 INFO L87 Difference]: Start difference. First operand 507 states and 1606 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:09,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:09,403 INFO L93 Difference]: Finished difference Result 704 states and 2178 transitions. [2021-06-12 20:04:09,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:09,403 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:09,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:09,404 INFO L225 Difference]: With dead ends: 704 [2021-06-12 20:04:09,404 INFO L226 Difference]: Without dead ends: 677 [2021-06-12 20:04:09,404 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 209.1ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:04:09,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-06-12 20:04:09,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 513. [2021-06-12 20:04:09,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 3.171875) internal successors, (1624), 512 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:09,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1624 transitions. [2021-06-12 20:04:09,419 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1624 transitions. Word has length 21 [2021-06-12 20:04:09,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:09,419 INFO L482 AbstractCegarLoop]: Abstraction has 513 states and 1624 transitions. [2021-06-12 20:04:09,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:09,419 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1624 transitions. [2021-06-12 20:04:09,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:09,419 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:09,420 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:09,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 683 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3728 [2021-06-12 20:04:09,620 INFO L430 AbstractCegarLoop]: === Iteration 695 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:09,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:09,620 INFO L82 PathProgramCache]: Analyzing trace with hash 170362301, now seen corresponding path program 683 times [2021-06-12 20:04:09,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:09,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104584157] [2021-06-12 20:04:09,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:09,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:09,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104584157] [2021-06-12 20:04:09,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104584157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:09,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637667584] [2021-06-12 20:04:09,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:09,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:04:09,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:09,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:04:09,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:09,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:09,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:09,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:09,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:09,794 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:09,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:09,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:09,809 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:04:09,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:09,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:09,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:09,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:09,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:09,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:09,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:09,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:09,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:09,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:09,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:09,905 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:09,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:09,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:09,908 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:09,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:09,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:09,937 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:89, output treesize:31 [2021-06-12 20:04:10,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:10,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637667584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:10,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:10,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:10,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695624774] [2021-06-12 20:04:10,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:10,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:10,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:10,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:10,014 INFO L87 Difference]: Start difference. First operand 513 states and 1624 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:10,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:10,229 INFO L93 Difference]: Finished difference Result 599 states and 1858 transitions. [2021-06-12 20:04:10,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:10,229 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:10,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:10,230 INFO L225 Difference]: With dead ends: 599 [2021-06-12 20:04:10,230 INFO L226 Difference]: Without dead ends: 580 [2021-06-12 20:04:10,230 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 234.6ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:04:10,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-06-12 20:04:10,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 497. [2021-06-12 20:04:10,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.1653225806451615) internal successors, (1570), 496 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:10,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1570 transitions. [2021-06-12 20:04:10,241 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1570 transitions. Word has length 21 [2021-06-12 20:04:10,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:10,241 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1570 transitions. [2021-06-12 20:04:10,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:10,241 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1570 transitions. [2021-06-12 20:04:10,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:10,241 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:10,241 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:10,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3740,684 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:10,442 INFO L430 AbstractCegarLoop]: === Iteration 696 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:10,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:10,442 INFO L82 PathProgramCache]: Analyzing trace with hash 715734955, now seen corresponding path program 684 times [2021-06-12 20:04:10,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:10,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074854658] [2021-06-12 20:04:10,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:10,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:10,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074854658] [2021-06-12 20:04:10,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074854658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:10,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109017566] [2021-06-12 20:04:10,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:10,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:04:10,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:10,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:10,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:10,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:10,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:10,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:10,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:10,614 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:10,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:10,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:10,633 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:04:10,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:10,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:10,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:10,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:10,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:10,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:10,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:10,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:10,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:10,749 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:7 [2021-06-12 20:04:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:10,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109017566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:10,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:10,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:04:10,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574986549] [2021-06-12 20:04:10,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:04:10,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:10,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:04:10,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:10,759 INFO L87 Difference]: Start difference. First operand 497 states and 1570 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:10,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:10,950 INFO L93 Difference]: Finished difference Result 608 states and 1877 transitions. [2021-06-12 20:04:10,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:10,950 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:10,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:10,951 INFO L225 Difference]: With dead ends: 608 [2021-06-12 20:04:10,951 INFO L226 Difference]: Without dead ends: 587 [2021-06-12 20:04:10,951 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 196.0ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:04:10,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-06-12 20:04:10,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 497. [2021-06-12 20:04:10,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.1733870967741935) internal successors, (1574), 496 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:10,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1574 transitions. [2021-06-12 20:04:10,956 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1574 transitions. Word has length 21 [2021-06-12 20:04:10,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:10,956 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1574 transitions. [2021-06-12 20:04:10,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:10,956 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1574 transitions. [2021-06-12 20:04:10,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:10,957 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:10,957 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:11,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 685 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3749 [2021-06-12 20:04:11,157 INFO L430 AbstractCegarLoop]: === Iteration 697 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:11,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:11,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1003249727, now seen corresponding path program 685 times [2021-06-12 20:04:11,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:11,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085199639] [2021-06-12 20:04:11,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:11,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:11,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:11,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:11,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085199639] [2021-06-12 20:04:11,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085199639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:11,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289598697] [2021-06-12 20:04:11,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:11,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:11,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:11,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:11,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:11,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:11,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:11,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:11,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:11,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:11,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:11,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:11,350 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:04:11,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:11,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:11,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:11,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:11,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:11,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:11,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:11,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:11,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:11,428 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:10 [2021-06-12 20:04:11,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:11,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289598697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:11,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:11,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:04:11,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948012692] [2021-06-12 20:04:11,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:04:11,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:11,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:04:11,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:11,443 INFO L87 Difference]: Start difference. First operand 497 states and 1574 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:11,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:11,607 INFO L93 Difference]: Finished difference Result 608 states and 1877 transitions. [2021-06-12 20:04:11,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:11,607 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:11,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:11,608 INFO L225 Difference]: With dead ends: 608 [2021-06-12 20:04:11,608 INFO L226 Difference]: Without dead ends: 587 [2021-06-12 20:04:11,608 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:11,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-06-12 20:04:11,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 493. [2021-06-12 20:04:11,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.1646341463414633) internal successors, (1557), 492 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:11,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1557 transitions. [2021-06-12 20:04:11,613 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1557 transitions. Word has length 21 [2021-06-12 20:04:11,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:11,613 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1557 transitions. [2021-06-12 20:04:11,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:11,613 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1557 transitions. [2021-06-12 20:04:11,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:11,614 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:11,614 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:11,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3756,686 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:11,814 INFO L430 AbstractCegarLoop]: === Iteration 698 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:11,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:11,815 INFO L82 PathProgramCache]: Analyzing trace with hash 393137451, now seen corresponding path program 686 times [2021-06-12 20:04:11,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:11,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524033356] [2021-06-12 20:04:11,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:11,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:11,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:11,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:11,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524033356] [2021-06-12 20:04:11,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524033356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:11,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046952416] [2021-06-12 20:04:11,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 687 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 687 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:11,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:11,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:11,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:11,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:12,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:12,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:12,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:12,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:12,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:12,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 20:04:12,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:12,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:12,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:12,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:12,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:12,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:12,164 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:12,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:12,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:12,173 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:7 [2021-06-12 20:04:12,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:12,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046952416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:12,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:12,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:12,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707416236] [2021-06-12 20:04:12,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:12,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:12,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:12,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:12,206 INFO L87 Difference]: Start difference. First operand 493 states and 1557 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:12,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:12,364 INFO L93 Difference]: Finished difference Result 655 states and 2027 transitions. [2021-06-12 20:04:12,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:12,364 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:12,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:12,365 INFO L225 Difference]: With dead ends: 655 [2021-06-12 20:04:12,365 INFO L226 Difference]: Without dead ends: 634 [2021-06-12 20:04:12,365 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 237.7ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:04:12,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-06-12 20:04:12,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 495. [2021-06-12 20:04:12,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 3.161943319838057) internal successors, (1562), 494 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:12,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1562 transitions. [2021-06-12 20:04:12,370 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1562 transitions. Word has length 21 [2021-06-12 20:04:12,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:12,371 INFO L482 AbstractCegarLoop]: Abstraction has 495 states and 1562 transitions. [2021-06-12 20:04:12,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:12,371 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1562 transitions. [2021-06-12 20:04:12,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:12,371 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:12,371 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:12,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 687 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3760 [2021-06-12 20:04:12,572 INFO L430 AbstractCegarLoop]: === Iteration 699 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:12,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:12,572 INFO L82 PathProgramCache]: Analyzing trace with hash -936790711, now seen corresponding path program 687 times [2021-06-12 20:04:12,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:12,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241738699] [2021-06-12 20:04:12,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:12,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:12,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:12,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241738699] [2021-06-12 20:04:12,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241738699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:12,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050134373] [2021-06-12 20:04:12,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 688 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 688 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:12,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:04:12,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:12,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:12,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:12,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:12,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:12,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:12,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:12,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:12,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 20:04:12,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:12,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:12,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:12,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:12,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:12,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:12,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:12,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:12,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:12,814 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:10 [2021-06-12 20:04:12,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:12,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050134373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:12,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:12,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:12,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180940437] [2021-06-12 20:04:12,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:12,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:12,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:12,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:12,860 INFO L87 Difference]: Start difference. First operand 495 states and 1562 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:13,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:13,000 INFO L93 Difference]: Finished difference Result 649 states and 2012 transitions. [2021-06-12 20:04:13,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:13,000 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:13,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:13,001 INFO L225 Difference]: With dead ends: 649 [2021-06-12 20:04:13,001 INFO L226 Difference]: Without dead ends: 628 [2021-06-12 20:04:13,001 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 183.1ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:04:13,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-06-12 20:04:13,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 492. [2021-06-12 20:04:13,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 3.1568228105906315) internal successors, (1550), 491 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:13,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1550 transitions. [2021-06-12 20:04:13,006 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1550 transitions. Word has length 21 [2021-06-12 20:04:13,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:13,007 INFO L482 AbstractCegarLoop]: Abstraction has 492 states and 1550 transitions. [2021-06-12 20:04:13,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:13,007 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1550 transitions. [2021-06-12 20:04:13,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:13,007 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:13,007 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:13,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3766,688 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:13,208 INFO L430 AbstractCegarLoop]: === Iteration 700 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:13,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:13,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1851872199, now seen corresponding path program 688 times [2021-06-12 20:04:13,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:13,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198781904] [2021-06-12 20:04:13,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:13,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:13,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:13,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198781904] [2021-06-12 20:04:13,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198781904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:13,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319753974] [2021-06-12 20:04:13,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:13,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:13,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:13,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:13,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:13,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:13,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:13,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:13,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:13,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:13,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 20:04:13,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:13,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:13,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:13,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:13,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:13,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:13,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:13,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:13,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:13,441 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:10 [2021-06-12 20:04:13,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:13,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319753974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:13,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:13,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:13,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93032376] [2021-06-12 20:04:13,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:13,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:13,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:13,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:13,485 INFO L87 Difference]: Start difference. First operand 492 states and 1550 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:13,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:13,639 INFO L93 Difference]: Finished difference Result 647 states and 1991 transitions. [2021-06-12 20:04:13,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:13,639 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:13,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:13,640 INFO L225 Difference]: With dead ends: 647 [2021-06-12 20:04:13,640 INFO L226 Difference]: Without dead ends: 626 [2021-06-12 20:04:13,640 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 175.7ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:04:13,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-06-12 20:04:13,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 470. [2021-06-12 20:04:13,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.140724946695096) internal successors, (1473), 469 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:13,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1473 transitions. [2021-06-12 20:04:13,645 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1473 transitions. Word has length 21 [2021-06-12 20:04:13,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:13,646 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1473 transitions. [2021-06-12 20:04:13,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:13,646 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1473 transitions. [2021-06-12 20:04:13,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:13,646 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:13,646 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:13,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3768,689 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:13,847 INFO L430 AbstractCegarLoop]: === Iteration 701 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:13,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:13,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1088900687, now seen corresponding path program 689 times [2021-06-12 20:04:13,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:13,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660054560] [2021-06-12 20:04:13,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:13,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:13,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:13,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660054560] [2021-06-12 20:04:13,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660054560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:13,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309271429] [2021-06-12 20:04:13,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:13,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:13,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:13,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:13,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:13,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:13,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:13,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:13,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:13,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:04:14,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:14,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:14,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:14,026 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:04:14,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:14,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:04:14,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:14,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309271429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:14,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:14,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:04:14,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823198071] [2021-06-12 20:04:14,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:04:14,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:14,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:04:14,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:04:14,035 INFO L87 Difference]: Start difference. First operand 470 states and 1473 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:14,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:14,174 INFO L93 Difference]: Finished difference Result 629 states and 1939 transitions. [2021-06-12 20:04:14,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:14,174 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:14,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:14,175 INFO L225 Difference]: With dead ends: 629 [2021-06-12 20:04:14,175 INFO L226 Difference]: Without dead ends: 607 [2021-06-12 20:04:14,176 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:14,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-12 20:04:14,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 479. [2021-06-12 20:04:14,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.1443514644351462) internal successors, (1503), 478 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:14,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1503 transitions. [2021-06-12 20:04:14,181 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1503 transitions. Word has length 21 [2021-06-12 20:04:14,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:14,181 INFO L482 AbstractCegarLoop]: Abstraction has 479 states and 1503 transitions. [2021-06-12 20:04:14,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:14,181 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1503 transitions. [2021-06-12 20:04:14,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:14,182 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:14,182 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:14,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 690 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3770 [2021-06-12 20:04:14,382 INFO L430 AbstractCegarLoop]: === Iteration 702 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:14,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:14,382 INFO L82 PathProgramCache]: Analyzing trace with hash 587109351, now seen corresponding path program 690 times [2021-06-12 20:04:14,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:14,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733083620] [2021-06-12 20:04:14,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:14,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:14,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:14,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733083620] [2021-06-12 20:04:14,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733083620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:14,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963288010] [2021-06-12 20:04:14,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 691 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 691 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:14,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:04:14,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:14,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:14,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:14,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:14,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:14,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:14,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:14,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 20:04:14,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:14,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:14,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:14,544 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:04:14,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:14,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:04:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:14,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963288010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:14,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:14,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:04:14,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646362965] [2021-06-12 20:04:14,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:04:14,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:14,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:04:14,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:04:14,559 INFO L87 Difference]: Start difference. First operand 479 states and 1503 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:14,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:14,685 INFO L93 Difference]: Finished difference Result 638 states and 1963 transitions. [2021-06-12 20:04:14,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:14,685 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:14,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:14,686 INFO L225 Difference]: With dead ends: 638 [2021-06-12 20:04:14,686 INFO L226 Difference]: Without dead ends: 616 [2021-06-12 20:04:14,686 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:04:14,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-06-12 20:04:14,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 476. [2021-06-12 20:04:14,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.1389473684210527) internal successors, (1491), 475 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:14,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1491 transitions. [2021-06-12 20:04:14,691 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1491 transitions. Word has length 21 [2021-06-12 20:04:14,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:14,691 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1491 transitions. [2021-06-12 20:04:14,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:14,691 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1491 transitions. [2021-06-12 20:04:14,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:14,692 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:14,692 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:14,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3772,691 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:14,892 INFO L430 AbstractCegarLoop]: === Iteration 703 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:14,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:14,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1519674769, now seen corresponding path program 691 times [2021-06-12 20:04:14,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:14,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564648537] [2021-06-12 20:04:14,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:14,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:14,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:14,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564648537] [2021-06-12 20:04:14,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564648537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:14,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615257327] [2021-06-12 20:04:14,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 692 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 692 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:14,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:14,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:15,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:15,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:15,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:15,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:15,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 20:04:15,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:15,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:15,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:15,054 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:04:15,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:15,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:04:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:15,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615257327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:15,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:15,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:04:15,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786527250] [2021-06-12 20:04:15,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:04:15,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:15,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:04:15,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:04:15,068 INFO L87 Difference]: Start difference. First operand 476 states and 1491 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:15,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:15,201 INFO L93 Difference]: Finished difference Result 626 states and 1930 transitions. [2021-06-12 20:04:15,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:15,201 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:15,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:15,202 INFO L225 Difference]: With dead ends: 626 [2021-06-12 20:04:15,202 INFO L226 Difference]: Without dead ends: 604 [2021-06-12 20:04:15,202 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 86.5ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:04:15,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-06-12 20:04:15,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 473. [2021-06-12 20:04:15,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.139830508474576) internal successors, (1482), 472 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:15,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1482 transitions. [2021-06-12 20:04:15,207 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1482 transitions. Word has length 21 [2021-06-12 20:04:15,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:15,207 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1482 transitions. [2021-06-12 20:04:15,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:15,207 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1482 transitions. [2021-06-12 20:04:15,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:15,208 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:15,208 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:15,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3774,692 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:15,408 INFO L430 AbstractCegarLoop]: === Iteration 704 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:15,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:15,408 INFO L82 PathProgramCache]: Analyzing trace with hash -479438971, now seen corresponding path program 692 times [2021-06-12 20:04:15,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:15,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152398537] [2021-06-12 20:04:15,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:15,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:15,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152398537] [2021-06-12 20:04:15,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152398537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:15,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612689557] [2021-06-12 20:04:15,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 693 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 693 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:15,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:15,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:15,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:15,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:15,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:15,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:15,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:15,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:15,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 20:04:15,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:15,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:15,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:15,557 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:04:15,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:15,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:04:15,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:15,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612689557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:15,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:15,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:04:15,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343591894] [2021-06-12 20:04:15,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:04:15,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:15,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:04:15,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:04:15,572 INFO L87 Difference]: Start difference. First operand 473 states and 1482 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:15,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:15,678 INFO L93 Difference]: Finished difference Result 704 states and 2158 transitions. [2021-06-12 20:04:15,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:15,678 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:15,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:15,679 INFO L225 Difference]: With dead ends: 704 [2021-06-12 20:04:15,679 INFO L226 Difference]: Without dead ends: 682 [2021-06-12 20:04:15,680 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:04:15,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-06-12 20:04:15,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 470. [2021-06-12 20:04:15,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.140724946695096) internal successors, (1473), 469 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:15,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1473 transitions. [2021-06-12 20:04:15,685 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1473 transitions. Word has length 21 [2021-06-12 20:04:15,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:15,685 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1473 transitions. [2021-06-12 20:04:15,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:15,685 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1473 transitions. [2021-06-12 20:04:15,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:15,685 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:15,685 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:15,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3776,693 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:15,886 INFO L430 AbstractCegarLoop]: === Iteration 705 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:15,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:15,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1152442371, now seen corresponding path program 693 times [2021-06-12 20:04:15,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:15,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226228961] [2021-06-12 20:04:15,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:15,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:15,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:15,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226228961] [2021-06-12 20:04:15,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226228961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:15,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182554134] [2021-06-12 20:04:15,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 694 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 694 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:15,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:04:15,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:15,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:15,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:16,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:16,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:16,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:16,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:16,057 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:16,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:16,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:16,064 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:04:16,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:16,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:16,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:16,102 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:04:16,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:16,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:04:16,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:16,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182554134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:16,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:16,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:16,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301229185] [2021-06-12 20:04:16,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:16,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:16,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:16,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:16,130 INFO L87 Difference]: Start difference. First operand 470 states and 1473 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:16,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:16,343 INFO L93 Difference]: Finished difference Result 648 states and 2002 transitions. [2021-06-12 20:04:16,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:16,343 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:16,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:16,344 INFO L225 Difference]: With dead ends: 648 [2021-06-12 20:04:16,344 INFO L226 Difference]: Without dead ends: 629 [2021-06-12 20:04:16,344 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 185.9ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:04:16,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-12 20:04:16,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 480. [2021-06-12 20:04:16,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.139874739039666) internal successors, (1504), 479 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:16,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1504 transitions. [2021-06-12 20:04:16,350 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1504 transitions. Word has length 21 [2021-06-12 20:04:16,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:16,350 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1504 transitions. [2021-06-12 20:04:16,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:16,350 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1504 transitions. [2021-06-12 20:04:16,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:16,350 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:16,351 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:16,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3778,694 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:16,551 INFO L430 AbstractCegarLoop]: === Iteration 706 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:16,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:16,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1456133085, now seen corresponding path program 694 times [2021-06-12 20:04:16,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:16,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167368313] [2021-06-12 20:04:16,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:16,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:16,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167368313] [2021-06-12 20:04:16,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167368313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:16,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261226719] [2021-06-12 20:04:16,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 695 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 695 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:16,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:16,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:16,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:16,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:16,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:16,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:16,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:16,742 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:16,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:16,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:16,749 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:04:16,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:16,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:16,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:16,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:16,786 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:16,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:16,793 INFO L518 ElimStorePlain]: Eliminatee v_prenex_194 vanished before elimination [2021-06-12 20:04:16,793 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:04:16,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:16,793 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:13 [2021-06-12 20:04:16,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:16,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261226719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:16,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:16,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:16,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907692363] [2021-06-12 20:04:16,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:16,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:16,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:16,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:16,845 INFO L87 Difference]: Start difference. First operand 480 states and 1504 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:17,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:17,072 INFO L93 Difference]: Finished difference Result 696 states and 2149 transitions. [2021-06-12 20:04:17,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:17,073 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:17,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:17,074 INFO L225 Difference]: With dead ends: 696 [2021-06-12 20:04:17,074 INFO L226 Difference]: Without dead ends: 673 [2021-06-12 20:04:17,074 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 189.9ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:17,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-06-12 20:04:17,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 478. [2021-06-12 20:04:17,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.142557651991614) internal successors, (1499), 477 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:17,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1499 transitions. [2021-06-12 20:04:17,079 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1499 transitions. Word has length 21 [2021-06-12 20:04:17,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:17,080 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1499 transitions. [2021-06-12 20:04:17,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:17,080 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1499 transitions. [2021-06-12 20:04:17,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:17,080 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:17,080 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:17,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3784,695 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:17,281 INFO L430 AbstractCegarLoop]: === Iteration 707 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:17,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:17,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1953035931, now seen corresponding path program 695 times [2021-06-12 20:04:17,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:17,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587256873] [2021-06-12 20:04:17,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:17,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:17,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:17,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587256873] [2021-06-12 20:04:17,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587256873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:17,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780699816] [2021-06-12 20:04:17,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 696 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 696 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:17,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:04:17,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:17,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:17,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:17,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:17,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:17,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:17,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:17,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 20:04:17,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:04:17,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:17,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:17,446 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:17,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:17,452 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:04:17,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:17,453 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:04:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:17,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780699816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:17,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:17,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:04:17,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97617664] [2021-06-12 20:04:17,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:04:17,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:17,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:04:17,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:17,499 INFO L87 Difference]: Start difference. First operand 478 states and 1499 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:17,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:17,683 INFO L93 Difference]: Finished difference Result 666 states and 2060 transitions. [2021-06-12 20:04:17,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:17,684 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:17,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:17,685 INFO L225 Difference]: With dead ends: 666 [2021-06-12 20:04:17,685 INFO L226 Difference]: Without dead ends: 639 [2021-06-12 20:04:17,685 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 140.6ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:17,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-06-12 20:04:17,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 476. [2021-06-12 20:04:17,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.1452631578947368) internal successors, (1494), 475 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:17,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1494 transitions. [2021-06-12 20:04:17,690 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1494 transitions. Word has length 21 [2021-06-12 20:04:17,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:17,690 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1494 transitions. [2021-06-12 20:04:17,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:17,690 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1494 transitions. [2021-06-12 20:04:17,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:17,690 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:17,690 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:17,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3789,696 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:17,891 INFO L430 AbstractCegarLoop]: === Iteration 708 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:17,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:17,891 INFO L82 PathProgramCache]: Analyzing trace with hash -159392699, now seen corresponding path program 696 times [2021-06-12 20:04:17,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:17,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562956074] [2021-06-12 20:04:17,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:17,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:17,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:17,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:17,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562956074] [2021-06-12 20:04:17,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562956074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:17,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175093850] [2021-06-12 20:04:17,972 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 697 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 697 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:18,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:04:18,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:18,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:18,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:18,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:18,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:18,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:18,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:18,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:15 [2021-06-12 20:04:18,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:04:18,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:18,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:18,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:18,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:18,148 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:04:18,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:18,148 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:04:18,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:18,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175093850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:18,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:18,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:18,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028466170] [2021-06-12 20:04:18,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:18,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:18,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:18,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:18,197 INFO L87 Difference]: Start difference. First operand 476 states and 1494 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:18,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:18,451 INFO L93 Difference]: Finished difference Result 771 states and 2376 transitions. [2021-06-12 20:04:18,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:18,451 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:18,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:18,453 INFO L225 Difference]: With dead ends: 771 [2021-06-12 20:04:18,453 INFO L226 Difference]: Without dead ends: 740 [2021-06-12 20:04:18,453 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 178.1ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:18,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-06-12 20:04:18,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 474. [2021-06-12 20:04:18,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.1479915433403804) internal successors, (1489), 473 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:18,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1489 transitions. [2021-06-12 20:04:18,459 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1489 transitions. Word has length 21 [2021-06-12 20:04:18,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:18,459 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1489 transitions. [2021-06-12 20:04:18,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:18,459 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1489 transitions. [2021-06-12 20:04:18,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:18,459 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:18,459 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:18,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 697 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3792 [2021-06-12 20:04:18,660 INFO L430 AbstractCegarLoop]: === Iteration 709 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:18,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:18,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1670259461, now seen corresponding path program 697 times [2021-06-12 20:04:18,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:18,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973927633] [2021-06-12 20:04:18,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:18,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:18,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:18,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:18,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973927633] [2021-06-12 20:04:18,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973927633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:18,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369176272] [2021-06-12 20:04:18,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 698 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 698 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:18,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:18,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:18,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:18,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:18,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:18,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:18,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:04:18,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:18,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:18,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:18,854 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:04:18,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:18,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:04:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:18,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369176272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:18,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:18,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:04:18,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468981730] [2021-06-12 20:04:18,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:04:18,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:18,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:04:18,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:18,864 INFO L87 Difference]: Start difference. First operand 474 states and 1489 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:19,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:19,004 INFO L93 Difference]: Finished difference Result 647 states and 2002 transitions. [2021-06-12 20:04:19,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:19,005 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:19,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:19,005 INFO L225 Difference]: With dead ends: 647 [2021-06-12 20:04:19,006 INFO L226 Difference]: Without dead ends: 625 [2021-06-12 20:04:19,006 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:19,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-06-12 20:04:19,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 480. [2021-06-12 20:04:19,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.152400835073069) internal successors, (1510), 479 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:19,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1510 transitions. [2021-06-12 20:04:19,011 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1510 transitions. Word has length 21 [2021-06-12 20:04:19,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:19,011 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1510 transitions. [2021-06-12 20:04:19,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:19,011 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1510 transitions. [2021-06-12 20:04:19,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:19,012 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:19,012 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:19,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3798,698 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:19,212 INFO L430 AbstractCegarLoop]: === Iteration 710 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:19,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:19,212 INFO L82 PathProgramCache]: Analyzing trace with hash 2122916499, now seen corresponding path program 698 times [2021-06-12 20:04:19,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:19,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140431507] [2021-06-12 20:04:19,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:19,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:19,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140431507] [2021-06-12 20:04:19,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140431507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:19,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957896219] [2021-06-12 20:04:19,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 699 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 699 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:19,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:19,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:19,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:19,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:19,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:19,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:19,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:19,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:19,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:19,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 20:04:19,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:19,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:19,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:19,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:19,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:19,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:04:19,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:19,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:19,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:19,484 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 20:04:19,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:19,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957896219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:19,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:19,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:04:19,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470999891] [2021-06-12 20:04:19,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:04:19,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:19,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:04:19,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:19,504 INFO L87 Difference]: Start difference. First operand 480 states and 1510 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:19,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:19,717 INFO L93 Difference]: Finished difference Result 638 states and 1978 transitions. [2021-06-12 20:04:19,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:19,717 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:19,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:19,718 INFO L225 Difference]: With dead ends: 638 [2021-06-12 20:04:19,718 INFO L226 Difference]: Without dead ends: 616 [2021-06-12 20:04:19,718 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 183.3ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:19,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-06-12 20:04:19,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 477. [2021-06-12 20:04:19,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.1470588235294117) internal successors, (1498), 476 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:19,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1498 transitions. [2021-06-12 20:04:19,723 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1498 transitions. Word has length 21 [2021-06-12 20:04:19,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:19,723 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1498 transitions. [2021-06-12 20:04:19,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:19,723 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1498 transitions. [2021-06-12 20:04:19,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:19,724 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:19,724 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:19,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 699 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3800 [2021-06-12 20:04:19,924 INFO L430 AbstractCegarLoop]: === Iteration 711 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:19,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:19,925 INFO L82 PathProgramCache]: Analyzing trace with hash 16132379, now seen corresponding path program 699 times [2021-06-12 20:04:19,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:19,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603266849] [2021-06-12 20:04:19,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:20,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:20,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603266849] [2021-06-12 20:04:20,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603266849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:20,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829969037] [2021-06-12 20:04:20,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 700 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 700 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:20,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:04:20,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:20,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:20,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:20,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:20,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:20,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:20,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:20,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-06-12 20:04:20,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:20,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:20,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:20,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:20,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:20,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:04:20,146 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:20,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:20,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:20,153 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:12 [2021-06-12 20:04:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:20,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829969037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:20,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:20,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:04:20,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669991164] [2021-06-12 20:04:20,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:04:20,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:20,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:04:20,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:20,167 INFO L87 Difference]: Start difference. First operand 477 states and 1498 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:20,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:20,331 INFO L93 Difference]: Finished difference Result 641 states and 1984 transitions. [2021-06-12 20:04:20,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:20,332 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:20,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:20,333 INFO L225 Difference]: With dead ends: 641 [2021-06-12 20:04:20,333 INFO L226 Difference]: Without dead ends: 619 [2021-06-12 20:04:20,333 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:20,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-12 20:04:20,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 474. [2021-06-12 20:04:20,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.1479915433403804) internal successors, (1489), 473 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:20,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1489 transitions. [2021-06-12 20:04:20,338 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1489 transitions. Word has length 21 [2021-06-12 20:04:20,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:20,338 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1489 transitions. [2021-06-12 20:04:20,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:20,338 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1489 transitions. [2021-06-12 20:04:20,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:20,339 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:20,339 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:20,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 700 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3803 [2021-06-12 20:04:20,539 INFO L430 AbstractCegarLoop]: === Iteration 712 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:20,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:20,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1748885421, now seen corresponding path program 700 times [2021-06-12 20:04:20,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:20,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491312238] [2021-06-12 20:04:20,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:20,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:20,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:20,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491312238] [2021-06-12 20:04:20,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491312238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:20,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150129624] [2021-06-12 20:04:20,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 701 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 701 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:20,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:20,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:20,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:20,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:20,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:20,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:20,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:20,685 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:20,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:20,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:20,694 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:04:20,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:20,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:20,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:20,751 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:04:20,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:20,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:04:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:20,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150129624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:20,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:20,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:04:20,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684784337] [2021-06-12 20:04:20,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:04:20,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:20,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:04:20,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:20,760 INFO L87 Difference]: Start difference. First operand 474 states and 1489 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:20,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:20,963 INFO L93 Difference]: Finished difference Result 655 states and 2025 transitions. [2021-06-12 20:04:20,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:20,963 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:20,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:20,964 INFO L225 Difference]: With dead ends: 655 [2021-06-12 20:04:20,964 INFO L226 Difference]: Without dead ends: 633 [2021-06-12 20:04:20,965 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 171.3ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:04:20,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-12 20:04:20,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 480. [2021-06-12 20:04:20,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.150313152400835) internal successors, (1509), 479 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:20,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1509 transitions. [2021-06-12 20:04:20,970 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1509 transitions. Word has length 21 [2021-06-12 20:04:20,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:20,970 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1509 transitions. [2021-06-12 20:04:20,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:20,970 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1509 transitions. [2021-06-12 20:04:20,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:20,970 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:20,971 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:21,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 701 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3805 [2021-06-12 20:04:21,171 INFO L430 AbstractCegarLoop]: === Iteration 713 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:21,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:21,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1247094085, now seen corresponding path program 701 times [2021-06-12 20:04:21,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:21,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092861092] [2021-06-12 20:04:21,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:21,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:21,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:21,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092861092] [2021-06-12 20:04:21,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092861092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:21,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985109496] [2021-06-12 20:04:21,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 702 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 702 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:21,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:21,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:21,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:21,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:21,362 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_195], 1=[o_0]} [2021-06-12 20:04:21,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:21,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:21,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:21,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:21,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:21,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:21,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:21,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:21,398 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:55, output treesize:39 [2021-06-12 20:04:21,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:21,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:21,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:21,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:21,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:21,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:04:21,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:21,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:21,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:21,482 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 20:04:21,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:21,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985109496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:21,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:21,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:04:21,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455694179] [2021-06-12 20:04:21,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:04:21,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:21,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:04:21,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:21,501 INFO L87 Difference]: Start difference. First operand 480 states and 1509 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:21,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:21,743 INFO L93 Difference]: Finished difference Result 646 states and 2001 transitions. [2021-06-12 20:04:21,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:21,743 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:21,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:21,744 INFO L225 Difference]: With dead ends: 646 [2021-06-12 20:04:21,744 INFO L226 Difference]: Without dead ends: 624 [2021-06-12 20:04:21,744 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 239.3ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:04:21,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-06-12 20:04:21,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 477. [2021-06-12 20:04:21,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.1449579831932772) internal successors, (1497), 476 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:21,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1497 transitions. [2021-06-12 20:04:21,754 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1497 transitions. Word has length 21 [2021-06-12 20:04:21,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:21,755 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1497 transitions. [2021-06-12 20:04:21,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:21,755 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1497 transitions. [2021-06-12 20:04:21,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:21,755 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:21,755 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:21,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3808,702 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:21,956 INFO L430 AbstractCegarLoop]: === Iteration 714 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:21,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:21,956 INFO L82 PathProgramCache]: Analyzing trace with hash 2062472997, now seen corresponding path program 702 times [2021-06-12 20:04:21,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:21,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819139341] [2021-06-12 20:04:21,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:22,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:22,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:22,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819139341] [2021-06-12 20:04:22,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819139341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:22,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66519476] [2021-06-12 20:04:22,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 703 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 703 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:22,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:04:22,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:22,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:22,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:22,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:22,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:22,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:22,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:22,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:22,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:22,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:22,168 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:46 [2021-06-12 20:04:22,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:22,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:22,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:22,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:22,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:22,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:22,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:22,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:22,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:22,265 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:13 [2021-06-12 20:04:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:22,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66519476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:22,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:22,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:22,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388660093] [2021-06-12 20:04:22,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:22,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:22,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:22,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:22,310 INFO L87 Difference]: Start difference. First operand 477 states and 1497 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:22,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:22,578 INFO L93 Difference]: Finished difference Result 656 states and 2022 transitions. [2021-06-12 20:04:22,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:22,578 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:22,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:22,579 INFO L225 Difference]: With dead ends: 656 [2021-06-12 20:04:22,579 INFO L226 Difference]: Without dead ends: 637 [2021-06-12 20:04:22,579 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 240.7ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:22,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-06-12 20:04:22,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 473. [2021-06-12 20:04:22,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.13771186440678) internal successors, (1481), 472 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:22,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1481 transitions. [2021-06-12 20:04:22,584 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1481 transitions. Word has length 21 [2021-06-12 20:04:22,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:22,584 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1481 transitions. [2021-06-12 20:04:22,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:22,584 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1481 transitions. [2021-06-12 20:04:22,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:22,585 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:22,585 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:22,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 703 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3813 [2021-06-12 20:04:22,786 INFO L430 AbstractCegarLoop]: === Iteration 715 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:22,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:22,786 INFO L82 PathProgramCache]: Analyzing trace with hash 333511109, now seen corresponding path program 703 times [2021-06-12 20:04:22,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:22,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43135168] [2021-06-12 20:04:22,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:22,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:22,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:22,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:22,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43135168] [2021-06-12 20:04:22,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43135168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:22,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929187513] [2021-06-12 20:04:22,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 704 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 704 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:22,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:22,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:22,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:22,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:22,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:22,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:22,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:22,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:22,951 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:04:23,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:23,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:23,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:23,009 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:04:23,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:23,011 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:23,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:23,017 INFO L518 ElimStorePlain]: Eliminatee v_prenex_197 vanished before elimination [2021-06-12 20:04:23,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:23,018 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:15 [2021-06-12 20:04:23,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:23,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929187513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:23,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:23,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:04:23,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585305111] [2021-06-12 20:04:23,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:04:23,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:23,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:04:23,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:04:23,036 INFO L87 Difference]: Start difference. First operand 473 states and 1481 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:23,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:23,201 INFO L93 Difference]: Finished difference Result 662 states and 2044 transitions. [2021-06-12 20:04:23,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:23,202 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:23,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:23,203 INFO L225 Difference]: With dead ends: 662 [2021-06-12 20:04:23,203 INFO L226 Difference]: Without dead ends: 633 [2021-06-12 20:04:23,203 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 157.1ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:23,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-12 20:04:23,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 470. [2021-06-12 20:04:23,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.140724946695096) internal successors, (1473), 469 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:23,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1473 transitions. [2021-06-12 20:04:23,209 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1473 transitions. Word has length 21 [2021-06-12 20:04:23,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:23,209 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1473 transitions. [2021-06-12 20:04:23,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:23,209 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1473 transitions. [2021-06-12 20:04:23,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:23,209 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:23,209 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:23,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3817,704 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:23,410 INFO L430 AbstractCegarLoop]: === Iteration 716 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:23,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:23,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1385473573, now seen corresponding path program 704 times [2021-06-12 20:04:23,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:23,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518375326] [2021-06-12 20:04:23,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:23,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:23,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:23,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518375326] [2021-06-12 20:04:23,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518375326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:23,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004256715] [2021-06-12 20:04:23,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 705 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 705 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:23,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:23,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:23,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:23,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:23,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:23,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:23,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:23,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:23,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:23,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:23,569 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:04:23,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:23,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:23,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:23,606 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:04:23,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:23,608 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:23,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:23,617 INFO L518 ElimStorePlain]: Eliminatee v_prenex_199 vanished before elimination [2021-06-12 20:04:23,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:23,617 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:21 [2021-06-12 20:04:23,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:23,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004256715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:23,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:23,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:04:23,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422179942] [2021-06-12 20:04:23,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:04:23,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:23,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:04:23,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:04:23,650 INFO L87 Difference]: Start difference. First operand 470 states and 1473 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:23,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:23,844 INFO L93 Difference]: Finished difference Result 665 states and 2052 transitions. [2021-06-12 20:04:23,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:23,844 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:23,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:23,845 INFO L225 Difference]: With dead ends: 665 [2021-06-12 20:04:23,845 INFO L226 Difference]: Without dead ends: 636 [2021-06-12 20:04:23,845 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 151.8ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:04:23,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-06-12 20:04:23,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 471. [2021-06-12 20:04:23,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.146808510638298) internal successors, (1479), 470 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:23,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1479 transitions. [2021-06-12 20:04:23,850 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1479 transitions. Word has length 21 [2021-06-12 20:04:23,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:23,850 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1479 transitions. [2021-06-12 20:04:23,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:23,850 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1479 transitions. [2021-06-12 20:04:23,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:23,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:23,851 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:24,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 705 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3825 [2021-06-12 20:04:24,051 INFO L430 AbstractCegarLoop]: === Iteration 717 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:24,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:24,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1088207163, now seen corresponding path program 705 times [2021-06-12 20:04:24,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:24,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957089383] [2021-06-12 20:04:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:24,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:24,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:24,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957089383] [2021-06-12 20:04:24,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957089383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:24,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321620390] [2021-06-12 20:04:24,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 706 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 706 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:24,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:04:24,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:24,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:24,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:24,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:24,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:24,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:24,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:24,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:24,245 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:24,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:24,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:24,257 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-12 20:04:24,289 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 20:04:24,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:24,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:24,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:24,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:24,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:24,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:24,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:24,313 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:24,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:24,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:24,329 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:19 [2021-06-12 20:04:24,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:24,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321620390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:24,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:24,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:24,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584621681] [2021-06-12 20:04:24,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:24,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:24,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:24,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:24,403 INFO L87 Difference]: Start difference. First operand 471 states and 1479 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:24,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:24,640 INFO L93 Difference]: Finished difference Result 704 states and 2167 transitions. [2021-06-12 20:04:24,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:24,640 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:24,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:24,641 INFO L225 Difference]: With dead ends: 704 [2021-06-12 20:04:24,641 INFO L226 Difference]: Without dead ends: 681 [2021-06-12 20:04:24,641 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 243.6ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:24,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-06-12 20:04:24,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 469. [2021-06-12 20:04:24,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.1367521367521367) internal successors, (1468), 468 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:24,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1468 transitions. [2021-06-12 20:04:24,647 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1468 transitions. Word has length 21 [2021-06-12 20:04:24,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:24,647 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1468 transitions. [2021-06-12 20:04:24,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:24,647 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1468 transitions. [2021-06-12 20:04:24,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:24,647 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:24,647 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:24,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3830,706 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:24,848 INFO L430 AbstractCegarLoop]: === Iteration 718 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:24,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:24,848 INFO L82 PathProgramCache]: Analyzing trace with hash 10913605, now seen corresponding path program 706 times [2021-06-12 20:04:24,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:24,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007564362] [2021-06-12 20:04:24,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:24,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:24,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:24,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007564362] [2021-06-12 20:04:24,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007564362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:24,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99200377] [2021-06-12 20:04:24,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 707 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 707 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:24,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:24,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:24,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:24,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:25,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:25,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:25,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:25,025 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:25,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:25,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:25,041 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:04:25,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:25,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:25,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:25,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:04:25,107 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:25,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:25,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:25,113 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:12 [2021-06-12 20:04:25,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:25,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99200377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:25,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:25,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:04:25,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533076327] [2021-06-12 20:04:25,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:04:25,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:25,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:04:25,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:25,127 INFO L87 Difference]: Start difference. First operand 469 states and 1468 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:25,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:25,317 INFO L93 Difference]: Finished difference Result 643 states and 1988 transitions. [2021-06-12 20:04:25,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:25,318 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:25,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:25,319 INFO L225 Difference]: With dead ends: 643 [2021-06-12 20:04:25,319 INFO L226 Difference]: Without dead ends: 621 [2021-06-12 20:04:25,319 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 140.8ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:25,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-12 20:04:25,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 472. [2021-06-12 20:04:25,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.142250530785563) internal successors, (1480), 471 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:25,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1480 transitions. [2021-06-12 20:04:25,324 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1480 transitions. Word has length 21 [2021-06-12 20:04:25,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:25,324 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1480 transitions. [2021-06-12 20:04:25,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:25,324 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1480 transitions. [2021-06-12 20:04:25,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:25,325 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:25,325 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:25,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 707 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3838 [2021-06-12 20:04:25,525 INFO L430 AbstractCegarLoop]: === Iteration 719 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:25,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:25,526 INFO L82 PathProgramCache]: Analyzing trace with hash 636237723, now seen corresponding path program 707 times [2021-06-12 20:04:25,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:25,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86572063] [2021-06-12 20:04:25,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:25,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:25,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:25,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86572063] [2021-06-12 20:04:25,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86572063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:25,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276322428] [2021-06-12 20:04:25,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 708 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 708 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:25,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:25,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:25,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:25,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:25,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:25,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:25,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:25,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:25,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 20:04:25,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:25,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:25,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:04:25,776 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:25,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:25,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:25,791 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:25,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:25,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:25,803 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:13 [2021-06-12 20:04:25,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:25,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276322428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:25,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:25,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:25,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045527537] [2021-06-12 20:04:25,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:25,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:25,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:25,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:25,852 INFO L87 Difference]: Start difference. First operand 472 states and 1480 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:26,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:26,091 INFO L93 Difference]: Finished difference Result 670 states and 2061 transitions. [2021-06-12 20:04:26,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:26,091 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:26,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:26,092 INFO L225 Difference]: With dead ends: 670 [2021-06-12 20:04:26,092 INFO L226 Difference]: Without dead ends: 643 [2021-06-12 20:04:26,093 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 192.9ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:04:26,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-06-12 20:04:26,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 472. [2021-06-12 20:04:26,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.1380042462845013) internal successors, (1478), 471 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:26,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1478 transitions. [2021-06-12 20:04:26,098 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1478 transitions. Word has length 21 [2021-06-12 20:04:26,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:26,098 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1478 transitions. [2021-06-12 20:04:26,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:26,098 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1478 transitions. [2021-06-12 20:04:26,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:26,098 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:26,099 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:26,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3842,708 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:26,299 INFO L430 AbstractCegarLoop]: === Iteration 720 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:26,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:26,299 INFO L82 PathProgramCache]: Analyzing trace with hash 2060871251, now seen corresponding path program 708 times [2021-06-12 20:04:26,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:26,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160047490] [2021-06-12 20:04:26,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:26,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:26,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160047490] [2021-06-12 20:04:26,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160047490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:26,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748058483] [2021-06-12 20:04:26,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 709 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 709 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:26,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:04:26,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:26,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:26,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:26,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:26,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:26,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:26,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:26,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:26,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:26,464 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:04:26,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:26,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:26,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:26,501 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:04:26,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:26,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:26,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:26,512 INFO L518 ElimStorePlain]: Eliminatee v_prenex_201 vanished before elimination [2021-06-12 20:04:26,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:26,513 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:21 [2021-06-12 20:04:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:26,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748058483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:26,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:26,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:04:26,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379648695] [2021-06-12 20:04:26,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:04:26,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:26,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:04:26,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:04:26,536 INFO L87 Difference]: Start difference. First operand 472 states and 1478 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:26,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:26,707 INFO L93 Difference]: Finished difference Result 658 states and 2032 transitions. [2021-06-12 20:04:26,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:26,707 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:26,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:26,708 INFO L225 Difference]: With dead ends: 658 [2021-06-12 20:04:26,708 INFO L226 Difference]: Without dead ends: 629 [2021-06-12 20:04:26,708 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 112.7ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:04:26,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-12 20:04:26,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 473. [2021-06-12 20:04:26,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.1440677966101696) internal successors, (1484), 472 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:26,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1484 transitions. [2021-06-12 20:04:26,713 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1484 transitions. Word has length 21 [2021-06-12 20:04:26,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:26,713 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1484 transitions. [2021-06-12 20:04:26,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:26,714 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1484 transitions. [2021-06-12 20:04:26,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:26,714 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:26,714 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:26,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3850,709 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:26,915 INFO L430 AbstractCegarLoop]: === Iteration 721 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:26,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:26,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1936829635, now seen corresponding path program 709 times [2021-06-12 20:04:26,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:26,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632179131] [2021-06-12 20:04:26,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:26,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:26,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632179131] [2021-06-12 20:04:26,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632179131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:26,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439778701] [2021-06-12 20:04:26,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 710 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 710 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:27,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:27,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:27,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:27,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:27,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:27,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:27,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:27,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 20:04:27,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:27,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:27,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:04:27,092 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:27,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:27,100 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:04:27,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:27,101 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:45, output treesize:19 [2021-06-12 20:04:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:27,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439778701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:27,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:27,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:04:27,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660864280] [2021-06-12 20:04:27,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:04:27,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:27,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:04:27,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:04:27,145 INFO L87 Difference]: Start difference. First operand 473 states and 1484 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:27,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:27,335 INFO L93 Difference]: Finished difference Result 602 states and 1853 transitions. [2021-06-12 20:04:27,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:27,335 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:27,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:27,336 INFO L225 Difference]: With dead ends: 602 [2021-06-12 20:04:27,336 INFO L226 Difference]: Without dead ends: 579 [2021-06-12 20:04:27,336 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:27,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-12 20:04:27,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 468. [2021-06-12 20:04:27,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.1349036402569594) internal successors, (1464), 467 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:27,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1464 transitions. [2021-06-12 20:04:27,341 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1464 transitions. Word has length 21 [2021-06-12 20:04:27,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:27,341 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1464 transitions. [2021-06-12 20:04:27,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:27,341 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1464 transitions. [2021-06-12 20:04:27,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:27,341 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:27,342 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:27,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3855,710 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:27,542 INFO L430 AbstractCegarLoop]: === Iteration 722 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:27,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:27,542 INFO L82 PathProgramCache]: Analyzing trace with hash -641220965, now seen corresponding path program 710 times [2021-06-12 20:04:27,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:27,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340083061] [2021-06-12 20:04:27,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:27,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:27,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340083061] [2021-06-12 20:04:27,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340083061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:27,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161702704] [2021-06-12 20:04:27,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 711 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 711 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:27,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:27,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:27,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:27,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:27,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:27,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:27,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:27,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:27,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:27,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:27,693 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:51, output treesize:27 [2021-06-12 20:04:27,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:27,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:27,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:27,719 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:04:27,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:27,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:04:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:27,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161702704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:27,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:27,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:04:27,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164355453] [2021-06-12 20:04:27,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:04:27,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:27,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:04:27,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:04:27,733 INFO L87 Difference]: Start difference. First operand 468 states and 1464 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:27,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:27,866 INFO L93 Difference]: Finished difference Result 839 states and 2583 transitions. [2021-06-12 20:04:27,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:27,866 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:27,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:27,868 INFO L225 Difference]: With dead ends: 839 [2021-06-12 20:04:27,868 INFO L226 Difference]: Without dead ends: 817 [2021-06-12 20:04:27,868 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:04:27,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-06-12 20:04:27,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 471. [2021-06-12 20:04:27,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.1404255319148935) internal successors, (1476), 470 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:27,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1476 transitions. [2021-06-12 20:04:27,874 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1476 transitions. Word has length 21 [2021-06-12 20:04:27,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:27,874 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1476 transitions. [2021-06-12 20:04:27,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:27,874 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1476 transitions. [2021-06-12 20:04:27,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:27,875 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:27,875 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:28,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3861,711 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:28,075 INFO L430 AbstractCegarLoop]: === Iteration 723 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:28,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:28,076 INFO L82 PathProgramCache]: Analyzing trace with hash -362076569, now seen corresponding path program 711 times [2021-06-12 20:04:28,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:28,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748226511] [2021-06-12 20:04:28,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:28,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:28,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:28,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:28,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748226511] [2021-06-12 20:04:28,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748226511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:28,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244454867] [2021-06-12 20:04:28,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 712 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 712 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:28,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:04:28,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:28,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:28,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:28,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:28,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:28,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:28,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:28,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:28,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:26 [2021-06-12 20:04:28,303 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_2]} [2021-06-12 20:04:28,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:04:28,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:28,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:28,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:28,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:28,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:28,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:28,323 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:28,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:28,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:28,335 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:13 [2021-06-12 20:04:28,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:28,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244454867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:28,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:28,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:28,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271340690] [2021-06-12 20:04:28,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:28,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:28,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:28,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:28,383 INFO L87 Difference]: Start difference. First operand 471 states and 1476 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:28,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:28,658 INFO L93 Difference]: Finished difference Result 769 states and 2349 transitions. [2021-06-12 20:04:28,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:28,658 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:28,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:28,659 INFO L225 Difference]: With dead ends: 769 [2021-06-12 20:04:28,659 INFO L226 Difference]: Without dead ends: 738 [2021-06-12 20:04:28,659 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 217.7ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:04:28,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2021-06-12 20:04:28,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 473. [2021-06-12 20:04:28,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.1461864406779663) internal successors, (1485), 472 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:28,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1485 transitions. [2021-06-12 20:04:28,665 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1485 transitions. Word has length 21 [2021-06-12 20:04:28,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:28,665 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1485 transitions. [2021-06-12 20:04:28,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:28,665 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1485 transitions. [2021-06-12 20:04:28,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:28,666 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:28,666 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:28,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 712 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3865 [2021-06-12 20:04:28,866 INFO L430 AbstractCegarLoop]: === Iteration 724 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:28,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:28,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1486531183, now seen corresponding path program 712 times [2021-06-12 20:04:28,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:28,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055359655] [2021-06-12 20:04:28,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:28,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:28,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055359655] [2021-06-12 20:04:28,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055359655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:28,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521176396] [2021-06-12 20:04:28,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 713 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 713 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:28,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:28,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:28,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:28,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:28,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:28,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:28,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:28,994 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:29,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:29,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:29,001 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:04:29,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:29,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:29,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:29,041 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:04:29,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:29,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:04:29,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:29,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521176396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:29,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:29,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:04:29,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832651532] [2021-06-12 20:04:29,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:04:29,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:29,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:04:29,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:04:29,056 INFO L87 Difference]: Start difference. First operand 473 states and 1485 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:29,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:29,215 INFO L93 Difference]: Finished difference Result 758 states and 2340 transitions. [2021-06-12 20:04:29,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:29,215 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:29,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:29,216 INFO L225 Difference]: With dead ends: 758 [2021-06-12 20:04:29,216 INFO L226 Difference]: Without dead ends: 736 [2021-06-12 20:04:29,216 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:04:29,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-06-12 20:04:29,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 475. [2021-06-12 20:04:29,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.1434599156118144) internal successors, (1490), 474 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:29,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1490 transitions. [2021-06-12 20:04:29,222 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1490 transitions. Word has length 21 [2021-06-12 20:04:29,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:29,222 INFO L482 AbstractCegarLoop]: Abstraction has 475 states and 1490 transitions. [2021-06-12 20:04:29,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:29,222 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1490 transitions. [2021-06-12 20:04:29,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:29,222 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:29,222 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:29,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3869,713 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:29,423 INFO L430 AbstractCegarLoop]: === Iteration 725 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:29,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:29,423 INFO L82 PathProgramCache]: Analyzing trace with hash -758478467, now seen corresponding path program 713 times [2021-06-12 20:04:29,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:29,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807586455] [2021-06-12 20:04:29,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:29,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:29,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:29,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807586455] [2021-06-12 20:04:29,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807586455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:29,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76265199] [2021-06-12 20:04:29,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 714 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 714 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:29,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:29,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:29,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:29,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:29,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:29,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:29,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:29,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:29,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:29,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:29,560 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:04:29,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:29,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:29,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:29,599 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:29,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:29,610 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:04:29,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:29,610 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-06-12 20:04:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:29,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76265199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:29,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:29,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:04:29,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399265354] [2021-06-12 20:04:29,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:04:29,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:29,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:04:29,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:04:29,640 INFO L87 Difference]: Start difference. First operand 475 states and 1490 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:29,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:29,814 INFO L93 Difference]: Finished difference Result 769 states and 2367 transitions. [2021-06-12 20:04:29,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:29,815 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:29,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:29,816 INFO L225 Difference]: With dead ends: 769 [2021-06-12 20:04:29,816 INFO L226 Difference]: Without dead ends: 740 [2021-06-12 20:04:29,816 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:04:29,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-06-12 20:04:29,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 467. [2021-06-12 20:04:29,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.133047210300429) internal successors, (1460), 466 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:29,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1460 transitions. [2021-06-12 20:04:29,821 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1460 transitions. Word has length 21 [2021-06-12 20:04:29,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:29,822 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1460 transitions. [2021-06-12 20:04:29,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:29,822 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1460 transitions. [2021-06-12 20:04:29,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:29,822 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:29,822 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:30,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3872,714 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:30,023 INFO L430 AbstractCegarLoop]: === Iteration 726 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:30,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:30,023 INFO L82 PathProgramCache]: Analyzing trace with hash -687354771, now seen corresponding path program 714 times [2021-06-12 20:04:30,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:30,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639695003] [2021-06-12 20:04:30,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:30,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:30,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:30,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639695003] [2021-06-12 20:04:30,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639695003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:30,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029342744] [2021-06-12 20:04:30,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 715 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 715 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:30,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:04:30,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:30,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:30,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:30,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:30,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:30,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:30,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:30,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:30,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:19 [2021-06-12 20:04:30,256 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 20:04:30,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:30,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:30,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:30,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:30,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:04:30,266 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:30,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:30,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:30,271 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:9 [2021-06-12 20:04:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:30,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029342744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:30,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:30,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:04:30,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124944095] [2021-06-12 20:04:30,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:04:30,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:30,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:04:30,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:30,280 INFO L87 Difference]: Start difference. First operand 467 states and 1460 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:30,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:30,415 INFO L93 Difference]: Finished difference Result 548 states and 1693 transitions. [2021-06-12 20:04:30,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:30,415 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:30,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:30,416 INFO L225 Difference]: With dead ends: 548 [2021-06-12 20:04:30,416 INFO L226 Difference]: Without dead ends: 526 [2021-06-12 20:04:30,416 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 159.4ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:30,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-12 20:04:30,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 473. [2021-06-12 20:04:30,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.13771186440678) internal successors, (1481), 472 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:30,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1481 transitions. [2021-06-12 20:04:30,421 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1481 transitions. Word has length 21 [2021-06-12 20:04:30,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:30,422 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1481 transitions. [2021-06-12 20:04:30,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:30,422 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1481 transitions. [2021-06-12 20:04:30,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:30,422 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:30,422 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:30,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3876,715 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:30,623 INFO L430 AbstractCegarLoop]: === Iteration 727 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:30,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:30,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1189146107, now seen corresponding path program 715 times [2021-06-12 20:04:30,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:30,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486767138] [2021-06-12 20:04:30,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:30,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:30,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:30,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486767138] [2021-06-12 20:04:30,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486767138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:30,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489715080] [2021-06-12 20:04:30,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 716 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 716 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:30,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:30,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:30,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:30,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:30,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:30,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:30,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:30,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 20:04:30,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:30,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:30,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:30,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:30,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:30,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:04:30,881 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:30,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:30,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:30,890 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 20:04:30,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:30,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489715080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:30,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:30,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:04:30,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106871671] [2021-06-12 20:04:30,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:04:30,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:30,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:04:30,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:30,910 INFO L87 Difference]: Start difference. First operand 473 states and 1481 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:31,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:31,079 INFO L93 Difference]: Finished difference Result 557 states and 1717 transitions. [2021-06-12 20:04:31,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:31,079 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:31,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:31,080 INFO L225 Difference]: With dead ends: 557 [2021-06-12 20:04:31,080 INFO L226 Difference]: Without dead ends: 535 [2021-06-12 20:04:31,080 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 158.7ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:31,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-12 20:04:31,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 470. [2021-06-12 20:04:31,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.1321961620469083) internal successors, (1469), 469 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:31,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1469 transitions. [2021-06-12 20:04:31,085 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1469 transitions. Word has length 21 [2021-06-12 20:04:31,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:31,085 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1469 transitions. [2021-06-12 20:04:31,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:31,085 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1469 transitions. [2021-06-12 20:04:31,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:31,086 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:31,086 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:31,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 716 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3878 [2021-06-12 20:04:31,297 INFO L430 AbstractCegarLoop]: === Iteration 728 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:31,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:31,297 INFO L82 PathProgramCache]: Analyzing trace with hash 999037069, now seen corresponding path program 716 times [2021-06-12 20:04:31,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:31,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31547675] [2021-06-12 20:04:31,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:31,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:31,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:31,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31547675] [2021-06-12 20:04:31,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31547675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:31,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316798809] [2021-06-12 20:04:31,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 717 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 717 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:31,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:31,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:31,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:31,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:31,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:31,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:31,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:31,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:31,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-06-12 20:04:31,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:31,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:31,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:31,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:31,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:31,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:04:31,515 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:31,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:31,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:31,521 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:12 [2021-06-12 20:04:31,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:31,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316798809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:31,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:31,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:04:31,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585624636] [2021-06-12 20:04:31,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:04:31,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:31,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:04:31,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:31,535 INFO L87 Difference]: Start difference. First operand 470 states and 1469 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:31,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:31,683 INFO L93 Difference]: Finished difference Result 545 states and 1684 transitions. [2021-06-12 20:04:31,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:31,683 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:31,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:31,684 INFO L225 Difference]: With dead ends: 545 [2021-06-12 20:04:31,684 INFO L226 Difference]: Without dead ends: 523 [2021-06-12 20:04:31,684 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 135.3ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:31,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-06-12 20:04:31,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 467. [2021-06-12 20:04:31,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.133047210300429) internal successors, (1460), 466 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:31,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1460 transitions. [2021-06-12 20:04:31,689 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1460 transitions. Word has length 21 [2021-06-12 20:04:31,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:31,689 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1460 transitions. [2021-06-12 20:04:31,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:31,689 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1460 transitions. [2021-06-12 20:04:31,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:31,689 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:31,689 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:31,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 717 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3881 [2021-06-12 20:04:31,890 INFO L430 AbstractCegarLoop]: === Iteration 729 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:31,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:31,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1517823703, now seen corresponding path program 717 times [2021-06-12 20:04:31,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:31,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658939537] [2021-06-12 20:04:31,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:31,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:31,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:31,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658939537] [2021-06-12 20:04:31,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658939537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:31,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175661758] [2021-06-12 20:04:31,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 718 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 718 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:32,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:04:32,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:32,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:32,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:32,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:32,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:32,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:32,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:32,110 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:32,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:32,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:32,126 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:04:32,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:32,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:32,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:32,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:32,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:32,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:32,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:32,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:32,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:32,206 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:7 [2021-06-12 20:04:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:32,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175661758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:32,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:32,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:32,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127865881] [2021-06-12 20:04:32,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:32,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:32,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:32,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:32,234 INFO L87 Difference]: Start difference. First operand 467 states and 1460 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:32,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:32,381 INFO L93 Difference]: Finished difference Result 612 states and 1891 transitions. [2021-06-12 20:04:32,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:32,381 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:32,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:32,382 INFO L225 Difference]: With dead ends: 612 [2021-06-12 20:04:32,382 INFO L226 Difference]: Without dead ends: 593 [2021-06-12 20:04:32,382 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 193.2ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:04:32,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-06-12 20:04:32,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 469. [2021-06-12 20:04:32,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.1346153846153846) internal successors, (1467), 468 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:32,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1467 transitions. [2021-06-12 20:04:32,388 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1467 transitions. Word has length 21 [2021-06-12 20:04:32,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:32,388 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1467 transitions. [2021-06-12 20:04:32,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:32,388 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1467 transitions. [2021-06-12 20:04:32,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:32,388 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:32,388 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:32,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3883,718 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:32,589 INFO L430 AbstractCegarLoop]: === Iteration 730 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:32,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:32,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1295615091, now seen corresponding path program 718 times [2021-06-12 20:04:32,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:32,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223464403] [2021-06-12 20:04:32,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:32,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:32,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223464403] [2021-06-12 20:04:32,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223464403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:32,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945387323] [2021-06-12 20:04:32,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 719 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 719 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:32,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:32,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:32,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:32,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:32,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:32,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:32,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:32,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:32,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:32,791 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 20:04:32,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:04:32,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:32,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:32,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:32,882 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:32,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:32,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:32,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:32,897 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:32,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:32,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:32,921 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:5 [2021-06-12 20:04:32,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:32,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945387323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:32,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:32,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:32,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952877167] [2021-06-12 20:04:32,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:32,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:32,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:32,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:32,948 INFO L87 Difference]: Start difference. First operand 469 states and 1467 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:33,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:33,206 INFO L93 Difference]: Finished difference Result 768 states and 2340 transitions. [2021-06-12 20:04:33,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:04:33,207 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:33,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:33,208 INFO L225 Difference]: With dead ends: 768 [2021-06-12 20:04:33,208 INFO L226 Difference]: Without dead ends: 708 [2021-06-12 20:04:33,208 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 202.1ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:33,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-06-12 20:04:33,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 469. [2021-06-12 20:04:33,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.1303418803418803) internal successors, (1465), 468 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:33,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1465 transitions. [2021-06-12 20:04:33,214 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1465 transitions. Word has length 21 [2021-06-12 20:04:33,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:33,214 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1465 transitions. [2021-06-12 20:04:33,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:33,214 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1465 transitions. [2021-06-12 20:04:33,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:33,214 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:33,214 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:33,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 719 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3891 [2021-06-12 20:04:33,415 INFO L430 AbstractCegarLoop]: === Iteration 731 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:33,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:33,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1090751753, now seen corresponding path program 719 times [2021-06-12 20:04:33,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:33,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119045490] [2021-06-12 20:04:33,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:33,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:33,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119045490] [2021-06-12 20:04:33,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119045490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:33,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130157496] [2021-06-12 20:04:33,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 720 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 720 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:33,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:33,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:33,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:33,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:33,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:33,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:33,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:33,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:33,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:33,635 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:33,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:33,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:33,651 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:04:33,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:33,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:33,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:33,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:33,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:33,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:33,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:33,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:33,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:33,721 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:33,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:33,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:33,735 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:61, output treesize:13 [2021-06-12 20:04:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:33,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130157496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:33,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:33,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:33,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781062063] [2021-06-12 20:04:33,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:33,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:33,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:33,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:33,783 INFO L87 Difference]: Start difference. First operand 469 states and 1465 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:34,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:34,054 INFO L93 Difference]: Finished difference Result 654 states and 2026 transitions. [2021-06-12 20:04:34,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:34,054 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:34,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:34,055 INFO L225 Difference]: With dead ends: 654 [2021-06-12 20:04:34,055 INFO L226 Difference]: Without dead ends: 631 [2021-06-12 20:04:34,056 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 194.8ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:04:34,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-12 20:04:34,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 467. [2021-06-12 20:04:34,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.133047210300429) internal successors, (1460), 466 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:34,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1460 transitions. [2021-06-12 20:04:34,061 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1460 transitions. Word has length 21 [2021-06-12 20:04:34,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:34,061 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1460 transitions. [2021-06-12 20:04:34,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:34,061 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1460 transitions. [2021-06-12 20:04:34,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:34,061 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:34,061 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:34,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3901,720 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:34,262 INFO L430 AbstractCegarLoop]: === Iteration 732 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:34,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:34,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1976550033, now seen corresponding path program 720 times [2021-06-12 20:04:34,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:34,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425291381] [2021-06-12 20:04:34,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:34,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:34,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:34,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425291381] [2021-06-12 20:04:34,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425291381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:34,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106940138] [2021-06-12 20:04:34,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 721 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 721 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:34,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:04:34,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:34,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:34,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:34,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:34,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:34,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:34,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:34,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:26 [2021-06-12 20:04:34,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:04:34,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:34,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:34,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:34,493 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:34,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:34,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:34,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:34,508 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:34,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:34,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:34,520 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:13 [2021-06-12 20:04:34,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:34,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106940138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:34,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:34,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:34,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213623523] [2021-06-12 20:04:34,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:34,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:34,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:34,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:34,572 INFO L87 Difference]: Start difference. First operand 467 states and 1460 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:34,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:34,739 INFO L93 Difference]: Finished difference Result 621 states and 1915 transitions. [2021-06-12 20:04:34,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:34,740 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:34,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:34,740 INFO L225 Difference]: With dead ends: 621 [2021-06-12 20:04:34,740 INFO L226 Difference]: Without dead ends: 594 [2021-06-12 20:04:34,741 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:04:34,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-12 20:04:34,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 469. [2021-06-12 20:04:34,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.1303418803418803) internal successors, (1465), 468 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:34,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1465 transitions. [2021-06-12 20:04:34,745 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1465 transitions. Word has length 21 [2021-06-12 20:04:34,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:34,745 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1465 transitions. [2021-06-12 20:04:34,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:34,746 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1465 transitions. [2021-06-12 20:04:34,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:34,746 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:34,746 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:34,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 721 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3911 [2021-06-12 20:04:34,947 INFO L430 AbstractCegarLoop]: === Iteration 733 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:34,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:34,947 INFO L82 PathProgramCache]: Analyzing trace with hash 2034154579, now seen corresponding path program 721 times [2021-06-12 20:04:34,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:34,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357621462] [2021-06-12 20:04:34,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:35,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:35,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:35,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357621462] [2021-06-12 20:04:35,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357621462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:35,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379551975] [2021-06-12 20:04:35,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 722 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 722 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:35,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:35,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:35,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:35,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:35,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:35,146 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:35,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:35,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:35,159 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-12 20:04:35,192 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_202, v_prenex_203], 1=[o_0, o_2]} [2021-06-12 20:04:35,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:35,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:35,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:35,206 INFO L518 ElimStorePlain]: Eliminatee v_prenex_203 vanished before elimination [2021-06-12 20:04:35,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:35,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:35,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:35,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:35,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:35,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:35,219 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:35,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:35,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:35,228 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:43, output treesize:13 [2021-06-12 20:04:35,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:35,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379551975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:35,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:35,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:35,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215006421] [2021-06-12 20:04:35,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:35,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:35,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:35,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:35,278 INFO L87 Difference]: Start difference. First operand 469 states and 1465 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:35,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:35,467 INFO L93 Difference]: Finished difference Result 675 states and 2082 transitions. [2021-06-12 20:04:35,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:04:35,468 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:35,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:35,468 INFO L225 Difference]: With dead ends: 675 [2021-06-12 20:04:35,468 INFO L226 Difference]: Without dead ends: 648 [2021-06-12 20:04:35,469 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 209.7ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:35,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-06-12 20:04:35,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 465. [2021-06-12 20:04:35,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.1357758620689653) internal successors, (1455), 464 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:35,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1455 transitions. [2021-06-12 20:04:35,474 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1455 transitions. Word has length 21 [2021-06-12 20:04:35,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:35,474 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1455 transitions. [2021-06-12 20:04:35,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:35,474 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1455 transitions. [2021-06-12 20:04:35,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:35,474 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:35,474 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:35,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 722 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3918 [2021-06-12 20:04:35,675 INFO L430 AbstractCegarLoop]: === Iteration 734 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:35,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:35,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1563177185, now seen corresponding path program 722 times [2021-06-12 20:04:35,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:35,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240846519] [2021-06-12 20:04:35,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:35,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:35,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240846519] [2021-06-12 20:04:35,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240846519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:35,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316337852] [2021-06-12 20:04:35,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 723 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 723 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:35,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:35,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:35,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:35,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:35,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:35,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:35,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:35,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:35,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:35,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:35,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:35,860 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:47, output treesize:31 [2021-06-12 20:04:35,920 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 20:04:35,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:35,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:35,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:35,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:35,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:04:35,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:35,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:35,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:35,934 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:9 [2021-06-12 20:04:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:35,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316337852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:35,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:35,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:04:35,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443383074] [2021-06-12 20:04:35,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:04:35,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:35,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:04:35,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:35,943 INFO L87 Difference]: Start difference. First operand 465 states and 1455 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:36,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:36,121 INFO L93 Difference]: Finished difference Result 596 states and 1840 transitions. [2021-06-12 20:04:36,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:36,122 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:36,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:36,122 INFO L225 Difference]: With dead ends: 596 [2021-06-12 20:04:36,122 INFO L226 Difference]: Without dead ends: 574 [2021-06-12 20:04:36,123 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 160.9ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:36,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-06-12 20:04:36,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 472. [2021-06-12 20:04:36,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.148619957537155) internal successors, (1483), 471 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:36,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1483 transitions. [2021-06-12 20:04:36,128 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1483 transitions. Word has length 21 [2021-06-12 20:04:36,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:36,128 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1483 transitions. [2021-06-12 20:04:36,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:36,128 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1483 transitions. [2021-06-12 20:04:36,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:36,128 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:36,128 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:36,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3931,723 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:36,329 INFO L430 AbstractCegarLoop]: === Iteration 735 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:36,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:36,329 INFO L82 PathProgramCache]: Analyzing trace with hash -2064968521, now seen corresponding path program 723 times [2021-06-12 20:04:36,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:36,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780256109] [2021-06-12 20:04:36,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:36,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:36,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:36,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780256109] [2021-06-12 20:04:36,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780256109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:36,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976667558] [2021-06-12 20:04:36,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 724 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 724 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:36,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:04:36,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:36,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:36,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:36,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:36,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:36,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:36,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:36,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:36,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:36,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:36,518 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:47, output treesize:31 [2021-06-12 20:04:36,560 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 20:04:36,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:36,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:36,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:36,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:36,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:04:36,571 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:36,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:36,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:36,577 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:12 [2021-06-12 20:04:36,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:36,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976667558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:36,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:36,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:04:36,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136850107] [2021-06-12 20:04:36,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:04:36,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:36,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:04:36,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:36,591 INFO L87 Difference]: Start difference. First operand 472 states and 1483 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:36,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:36,768 INFO L93 Difference]: Finished difference Result 587 states and 1816 transitions. [2021-06-12 20:04:36,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:36,769 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:36,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:36,770 INFO L225 Difference]: With dead ends: 587 [2021-06-12 20:04:36,770 INFO L226 Difference]: Without dead ends: 565 [2021-06-12 20:04:36,770 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 148.7ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:36,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-12 20:04:36,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 469. [2021-06-12 20:04:36,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.143162393162393) internal successors, (1471), 468 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:36,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1471 transitions. [2021-06-12 20:04:36,775 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1471 transitions. Word has length 21 [2021-06-12 20:04:36,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:36,775 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1471 transitions. [2021-06-12 20:04:36,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:36,775 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1471 transitions. [2021-06-12 20:04:36,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:36,776 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:36,776 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:36,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 724 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3934 [2021-06-12 20:04:36,976 INFO L430 AbstractCegarLoop]: === Iteration 736 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:36,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:36,976 INFO L82 PathProgramCache]: Analyzing trace with hash -937853067, now seen corresponding path program 724 times [2021-06-12 20:04:36,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:36,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208731476] [2021-06-12 20:04:36,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:37,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:37,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208731476] [2021-06-12 20:04:37,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208731476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:37,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951727646] [2021-06-12 20:04:37,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 725 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 725 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:37,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:37,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:37,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:37,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:37,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:37,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:37,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:37,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:37,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:37,155 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:37,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:37,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:37,175 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:46 [2021-06-12 20:04:37,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:37,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:37,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:37,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:37,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:37,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:37,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:37,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:37,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:37,318 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:7 [2021-06-12 20:04:37,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:37,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951727646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:37,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:37,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:04:37,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216933897] [2021-06-12 20:04:37,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:04:37,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:37,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:04:37,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:37,332 INFO L87 Difference]: Start difference. First operand 469 states and 1471 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:37,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:37,541 INFO L93 Difference]: Finished difference Result 575 states and 1765 transitions. [2021-06-12 20:04:37,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:37,541 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:37,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:37,542 INFO L225 Difference]: With dead ends: 575 [2021-06-12 20:04:37,542 INFO L226 Difference]: Without dead ends: 556 [2021-06-12 20:04:37,542 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 192.6ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:04:37,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-12 20:04:37,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 475. [2021-06-12 20:04:37,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.151898734177215) internal successors, (1494), 474 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:37,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1494 transitions. [2021-06-12 20:04:37,547 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1494 transitions. Word has length 21 [2021-06-12 20:04:37,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:37,547 INFO L482 AbstractCegarLoop]: Abstraction has 475 states and 1494 transitions. [2021-06-12 20:04:37,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:37,547 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1494 transitions. [2021-06-12 20:04:37,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:37,547 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:37,548 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:37,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 725 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3937 [2021-06-12 20:04:37,748 INFO L430 AbstractCegarLoop]: === Iteration 737 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:37,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:37,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1160061679, now seen corresponding path program 725 times [2021-06-12 20:04:37,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:37,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30084476] [2021-06-12 20:04:37,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:37,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:37,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:37,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:37,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30084476] [2021-06-12 20:04:37,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30084476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:37,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769043702] [2021-06-12 20:04:37,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 726 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 726 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:37,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:37,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:37,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:37,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:37,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:37,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:37,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:37,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:37,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:37,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 20:04:38,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:04:38,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:38,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:38,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:38,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:38,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:38,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:38,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:38,037 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:38,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:38,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:38,049 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:5 [2021-06-12 20:04:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:38,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769043702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:38,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:38,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:04:38,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285934470] [2021-06-12 20:04:38,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:04:38,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:38,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:04:38,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:38,056 INFO L87 Difference]: Start difference. First operand 475 states and 1494 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:38,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:38,231 INFO L93 Difference]: Finished difference Result 584 states and 1799 transitions. [2021-06-12 20:04:38,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:38,231 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:38,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:38,232 INFO L225 Difference]: With dead ends: 584 [2021-06-12 20:04:38,232 INFO L226 Difference]: Without dead ends: 551 [2021-06-12 20:04:38,232 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 142.2ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:38,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-06-12 20:04:38,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 475. [2021-06-12 20:04:38,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.1413502109704643) internal successors, (1489), 474 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:38,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1489 transitions. [2021-06-12 20:04:38,237 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1489 transitions. Word has length 21 [2021-06-12 20:04:38,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:38,237 INFO L482 AbstractCegarLoop]: Abstraction has 475 states and 1489 transitions. [2021-06-12 20:04:38,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:38,237 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1489 transitions. [2021-06-12 20:04:38,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:38,237 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:38,237 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:38,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 726 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3950 [2021-06-12 20:04:38,438 INFO L430 AbstractCegarLoop]: === Iteration 738 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:38,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:38,438 INFO L82 PathProgramCache]: Analyzing trace with hash 748538773, now seen corresponding path program 726 times [2021-06-12 20:04:38,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:38,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205590503] [2021-06-12 20:04:38,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:38,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:38,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:38,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205590503] [2021-06-12 20:04:38,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205590503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:38,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348186480] [2021-06-12 20:04:38,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 727 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 727 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:38,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:04:38,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:38,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:38,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:38,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:38,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:38,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:38,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:38,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:38,617 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:38,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:38,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:38,636 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:46 [2021-06-12 20:04:38,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:38,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:38,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:38,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:38,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:38,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:38,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:38,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:38,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:38,746 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:38,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:38,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:38,759 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:61, output treesize:13 [2021-06-12 20:04:38,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:38,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348186480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:38,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:38,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:04:38,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538263176] [2021-06-12 20:04:38,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:04:38,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:38,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:04:38,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:38,794 INFO L87 Difference]: Start difference. First operand 475 states and 1489 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:39,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:39,013 INFO L93 Difference]: Finished difference Result 603 states and 1864 transitions. [2021-06-12 20:04:39,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:39,013 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:39,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:39,014 INFO L225 Difference]: With dead ends: 603 [2021-06-12 20:04:39,014 INFO L226 Difference]: Without dead ends: 580 [2021-06-12 20:04:39,014 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:39,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-06-12 20:04:39,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 475. [2021-06-12 20:04:39,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.1413502109704643) internal successors, (1489), 474 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:39,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1489 transitions. [2021-06-12 20:04:39,019 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1489 transitions. Word has length 21 [2021-06-12 20:04:39,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:39,019 INFO L482 AbstractCegarLoop]: Abstraction has 475 states and 1489 transitions. [2021-06-12 20:04:39,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:39,019 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1489 transitions. [2021-06-12 20:04:39,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:39,020 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:39,020 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:39,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3960,727 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:39,220 INFO L430 AbstractCegarLoop]: === Iteration 739 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:39,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:39,220 INFO L82 PathProgramCache]: Analyzing trace with hash 464276089, now seen corresponding path program 727 times [2021-06-12 20:04:39,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:39,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910719460] [2021-06-12 20:04:39,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:39,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:39,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910719460] [2021-06-12 20:04:39,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910719460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:39,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154193211] [2021-06-12 20:04:39,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 728 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 728 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:39,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:39,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:39,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:39,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:39,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:39,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:39,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:39,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 20:04:39,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:39,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:39,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:39,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:39,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:04:39,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:39,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:39,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:39,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:39,482 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:39,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:39,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:39,496 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:13 [2021-06-12 20:04:39,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:39,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154193211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:39,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:39,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:04:39,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673914914] [2021-06-12 20:04:39,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:04:39,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:39,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:04:39,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:39,516 INFO L87 Difference]: Start difference. First operand 475 states and 1489 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:39,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:39,715 INFO L93 Difference]: Finished difference Result 574 states and 1771 transitions. [2021-06-12 20:04:39,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:39,716 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:39,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:39,717 INFO L225 Difference]: With dead ends: 574 [2021-06-12 20:04:39,717 INFO L226 Difference]: Without dead ends: 547 [2021-06-12 20:04:39,717 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:39,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-12 20:04:39,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 473. [2021-06-12 20:04:39,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.1440677966101696) internal successors, (1484), 472 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:39,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1484 transitions. [2021-06-12 20:04:39,721 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1484 transitions. Word has length 21 [2021-06-12 20:04:39,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:39,721 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1484 transitions. [2021-06-12 20:04:39,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:39,722 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1484 transitions. [2021-06-12 20:04:39,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:39,722 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:39,722 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:39,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3970,728 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:39,923 INFO L430 AbstractCegarLoop]: === Iteration 740 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:39,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:39,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1249589609, now seen corresponding path program 728 times [2021-06-12 20:04:39,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:39,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038931353] [2021-06-12 20:04:39,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:40,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:40,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038931353] [2021-06-12 20:04:40,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038931353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:40,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747468557] [2021-06-12 20:04:40,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 729 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 729 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:40,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:40,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:40,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:40,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:40,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:40,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:40,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:40,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:40,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:40,111 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:40,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:40,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:40,123 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-12 20:04:40,168 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 20:04:40,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:40,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:40,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:40,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:40,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:40,178 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:40,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:40,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:40,184 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:35, output treesize:10 [2021-06-12 20:04:40,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:40,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747468557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:40,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:40,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:40,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018247344] [2021-06-12 20:04:40,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:40,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:40,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:40,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:40,226 INFO L87 Difference]: Start difference. First operand 473 states and 1484 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:40,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:40,415 INFO L93 Difference]: Finished difference Result 614 states and 1893 transitions. [2021-06-12 20:04:40,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:40,415 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:40,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:40,416 INFO L225 Difference]: With dead ends: 614 [2021-06-12 20:04:40,416 INFO L226 Difference]: Without dead ends: 595 [2021-06-12 20:04:40,416 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 199.7ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:04:40,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-06-12 20:04:40,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 469. [2021-06-12 20:04:40,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.1367521367521367) internal successors, (1468), 468 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:40,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1468 transitions. [2021-06-12 20:04:40,421 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1468 transitions. Word has length 21 [2021-06-12 20:04:40,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:40,421 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1468 transitions. [2021-06-12 20:04:40,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:40,421 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1468 transitions. [2021-06-12 20:04:40,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:40,421 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:40,422 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:40,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3981,729 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:40,622 INFO L430 AbstractCegarLoop]: === Iteration 741 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:40,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:40,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1316415799, now seen corresponding path program 729 times [2021-06-12 20:04:40,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:40,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082439696] [2021-06-12 20:04:40,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:40,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:40,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:40,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:40,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082439696] [2021-06-12 20:04:40,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082439696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:40,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383793119] [2021-06-12 20:04:40,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 730 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 730 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:40,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:04:40,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:40,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:40,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:40,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:40,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:40,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:40,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:40,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:40,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:40,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:40,811 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:47, output treesize:31 [2021-06-12 20:04:40,868 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 20:04:40,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:40,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:40,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:40,874 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:40,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:40,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:40,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:04:40,888 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:40,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:40,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:40,901 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:15 [2021-06-12 20:04:40,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:40,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383793119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:40,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:40,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:04:40,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488226634] [2021-06-12 20:04:40,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:04:40,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:40,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:04:40,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:40,927 INFO L87 Difference]: Start difference. First operand 469 states and 1468 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:41,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:41,101 INFO L93 Difference]: Finished difference Result 605 states and 1868 transitions. [2021-06-12 20:04:41,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:41,101 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:41,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:41,102 INFO L225 Difference]: With dead ends: 605 [2021-06-12 20:04:41,102 INFO L226 Difference]: Without dead ends: 576 [2021-06-12 20:04:41,102 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 170.7ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:41,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-12 20:04:41,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 469. [2021-06-12 20:04:41,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.1367521367521367) internal successors, (1468), 468 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:41,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1468 transitions. [2021-06-12 20:04:41,107 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1468 transitions. Word has length 21 [2021-06-12 20:04:41,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:41,107 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1468 transitions. [2021-06-12 20:04:41,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:41,107 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1468 transitions. [2021-06-12 20:04:41,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:41,107 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:41,107 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:41,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3984,730 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:41,308 INFO L430 AbstractCegarLoop]: === Iteration 742 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:41,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:41,308 INFO L82 PathProgramCache]: Analyzing trace with hash 221716881, now seen corresponding path program 730 times [2021-06-12 20:04:41,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:41,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964579294] [2021-06-12 20:04:41,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:41,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:41,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:41,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964579294] [2021-06-12 20:04:41,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964579294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:41,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805787067] [2021-06-12 20:04:41,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 731 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 731 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:41,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:41,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:41,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:41,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:41,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:41,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:41,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:41,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:41,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:41,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 20:04:41,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:04:41,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:41,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:41,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:41,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:41,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:41,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:41,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:41,593 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:41,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:41,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:41,607 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:63, output treesize:16 [2021-06-12 20:04:41,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:41,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805787067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:41,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:41,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:41,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226418026] [2021-06-12 20:04:41,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:41,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:41,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:41,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:41,657 INFO L87 Difference]: Start difference. First operand 469 states and 1468 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:41,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:41,987 INFO L93 Difference]: Finished difference Result 813 states and 2477 transitions. [2021-06-12 20:04:41,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:04:41,987 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:41,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:41,988 INFO L225 Difference]: With dead ends: 813 [2021-06-12 20:04:41,988 INFO L226 Difference]: Without dead ends: 759 [2021-06-12 20:04:41,988 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 268.0ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:04:41,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-06-12 20:04:41,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 470. [2021-06-12 20:04:41,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.1577825159914714) internal successors, (1481), 469 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:41,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1481 transitions. [2021-06-12 20:04:41,994 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1481 transitions. Word has length 21 [2021-06-12 20:04:41,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:41,994 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1481 transitions. [2021-06-12 20:04:41,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:41,994 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1481 transitions. [2021-06-12 20:04:41,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:41,994 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:41,994 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:42,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3992,731 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:42,195 INFO L430 AbstractCegarLoop]: === Iteration 743 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:42,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:42,195 INFO L82 PathProgramCache]: Analyzing trace with hash -402568883, now seen corresponding path program 731 times [2021-06-12 20:04:42,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:42,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790503491] [2021-06-12 20:04:42,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:42,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:42,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:42,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:42,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790503491] [2021-06-12 20:04:42,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790503491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:42,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403474722] [2021-06-12 20:04:42,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 732 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 732 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:42,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:42,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:42,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:42,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:42,398 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_204], 1=[o_0]} [2021-06-12 20:04:42,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:42,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:42,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:42,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:42,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:42,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:42,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:42,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:42,432 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:55, output treesize:39 [2021-06-12 20:04:42,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:42,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:42,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:42,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:42,479 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:42,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:42,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:42,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:04:42,498 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:42,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:42,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:42,514 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:67, output treesize:21 [2021-06-12 20:04:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:42,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403474722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:42,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:42,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:04:42,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554463995] [2021-06-12 20:04:42,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:04:42,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:42,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:04:42,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:42,556 INFO L87 Difference]: Start difference. First operand 470 states and 1481 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:42,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:42,736 INFO L93 Difference]: Finished difference Result 613 states and 1898 transitions. [2021-06-12 20:04:42,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:42,737 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:42,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:42,737 INFO L225 Difference]: With dead ends: 613 [2021-06-12 20:04:42,738 INFO L226 Difference]: Without dead ends: 584 [2021-06-12 20:04:42,738 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 174.7ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:42,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-06-12 20:04:42,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 470. [2021-06-12 20:04:42,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.1577825159914714) internal successors, (1481), 469 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:42,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1481 transitions. [2021-06-12 20:04:42,742 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1481 transitions. Word has length 21 [2021-06-12 20:04:42,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:42,742 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1481 transitions. [2021-06-12 20:04:42,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:42,743 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1481 transitions. [2021-06-12 20:04:42,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:42,743 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:42,743 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:42,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 732 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4001 [2021-06-12 20:04:42,944 INFO L430 AbstractCegarLoop]: === Iteration 744 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:42,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:42,944 INFO L82 PathProgramCache]: Analyzing trace with hash -105302473, now seen corresponding path program 732 times [2021-06-12 20:04:42,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:42,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102499212] [2021-06-12 20:04:42,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:43,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:43,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102499212] [2021-06-12 20:04:43,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102499212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:43,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631257306] [2021-06-12 20:04:43,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 733 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 733 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:43,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:04:43,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:43,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:43,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:43,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:43,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:43,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:43,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:43,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:43,132 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:43,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:43,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:43,144 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-12 20:04:43,180 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 20:04:43,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:43,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:43,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:43,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:43,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:43,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:43,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:43,204 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:43,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:43,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:43,219 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:19 [2021-06-12 20:04:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:43,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631257306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:43,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:43,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:43,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746515541] [2021-06-12 20:04:43,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:43,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:43,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:43,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:43,292 INFO L87 Difference]: Start difference. First operand 470 states and 1481 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:43,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:43,495 INFO L93 Difference]: Finished difference Result 668 states and 2064 transitions. [2021-06-12 20:04:43,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:43,496 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:43,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:43,496 INFO L225 Difference]: With dead ends: 668 [2021-06-12 20:04:43,497 INFO L226 Difference]: Without dead ends: 645 [2021-06-12 20:04:43,497 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 221.6ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:04:43,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-06-12 20:04:43,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 470. [2021-06-12 20:04:43,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.1577825159914714) internal successors, (1481), 469 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:43,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1481 transitions. [2021-06-12 20:04:43,502 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1481 transitions. Word has length 21 [2021-06-12 20:04:43,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:43,502 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1481 transitions. [2021-06-12 20:04:43,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:43,502 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1481 transitions. [2021-06-12 20:04:43,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:43,502 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:43,502 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:43,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 733 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4008 [2021-06-12 20:04:43,703 INFO L430 AbstractCegarLoop]: === Iteration 745 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:43,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:43,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1393897095, now seen corresponding path program 733 times [2021-06-12 20:04:43,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:43,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700227633] [2021-06-12 20:04:43,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:43,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:43,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700227633] [2021-06-12 20:04:43,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700227633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:43,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017386717] [2021-06-12 20:04:43,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 734 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 734 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:43,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:43,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:43,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:43,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:43,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:43,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:43,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:43,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 20:04:43,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:04:43,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:43,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:43,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:43,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:43,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:43,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:43,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:43,961 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:43,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:43,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:43,984 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:22 [2021-06-12 20:04:44,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:44,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017386717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:44,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:44,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:44,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857083405] [2021-06-12 20:04:44,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:44,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:44,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:44,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:44,060 INFO L87 Difference]: Start difference. First operand 470 states and 1481 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:44,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:44,332 INFO L93 Difference]: Finished difference Result 712 states and 2177 transitions. [2021-06-12 20:04:44,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:04:44,332 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:44,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:44,333 INFO L225 Difference]: With dead ends: 712 [2021-06-12 20:04:44,333 INFO L226 Difference]: Without dead ends: 685 [2021-06-12 20:04:44,333 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 243.2ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:04:44,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-06-12 20:04:44,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 465. [2021-06-12 20:04:44,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.1357758620689653) internal successors, (1455), 464 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:44,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1455 transitions. [2021-06-12 20:04:44,339 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1455 transitions. Word has length 21 [2021-06-12 20:04:44,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:44,339 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1455 transitions. [2021-06-12 20:04:44,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:44,339 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1455 transitions. [2021-06-12 20:04:44,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:44,339 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:44,339 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:44,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4016,734 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:44,540 INFO L430 AbstractCegarLoop]: === Iteration 746 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:44,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:44,540 INFO L82 PathProgramCache]: Analyzing trace with hash 993818295, now seen corresponding path program 734 times [2021-06-12 20:04:44,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:44,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560189926] [2021-06-12 20:04:44,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:44,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:44,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:44,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560189926] [2021-06-12 20:04:44,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560189926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:44,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80481359] [2021-06-12 20:04:44,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 735 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 735 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:44,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:44,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:44,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:44,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:44,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:44,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:44,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:44,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:44,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:44,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:44,736 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:04:44,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:44,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:44,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:44,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:44,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:44,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:04:44,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:44,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:44,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:44,806 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:12 [2021-06-12 20:04:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:44,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80481359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:44,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:44,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:04:44,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396434048] [2021-06-12 20:04:44,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:04:44,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:44,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:04:44,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:44,825 INFO L87 Difference]: Start difference. First operand 465 states and 1455 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:44,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:44,970 INFO L93 Difference]: Finished difference Result 585 states and 1804 transitions. [2021-06-12 20:04:44,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:44,970 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:44,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:44,971 INFO L225 Difference]: With dead ends: 585 [2021-06-12 20:04:44,971 INFO L226 Difference]: Without dead ends: 563 [2021-06-12 20:04:44,971 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 152.1ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:44,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-12 20:04:44,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 467. [2021-06-12 20:04:44,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.1373390557939915) internal successors, (1462), 466 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:44,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1462 transitions. [2021-06-12 20:04:44,976 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1462 transitions. Word has length 21 [2021-06-12 20:04:44,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:44,976 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1462 transitions. [2021-06-12 20:04:44,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:44,976 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1462 transitions. [2021-06-12 20:04:44,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:44,977 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:44,977 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:45,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4028,735 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:45,177 INFO L430 AbstractCegarLoop]: === Iteration 747 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:45,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:45,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1619142413, now seen corresponding path program 735 times [2021-06-12 20:04:45,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:45,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597125236] [2021-06-12 20:04:45,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:45,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:45,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:45,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597125236] [2021-06-12 20:04:45,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597125236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:45,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169708446] [2021-06-12 20:04:45,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 736 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 736 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:45,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:04:45,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:45,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:45,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:45,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:45,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:45,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:45,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:45,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 20:04:45,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:45,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:45,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:45,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:45,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:04:45,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:45,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:45,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:45,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:45,420 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:45,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:45,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:45,433 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:13 [2021-06-12 20:04:45,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:45,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169708446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:45,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:45,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:04:45,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628365602] [2021-06-12 20:04:45,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:04:45,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:45,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:04:45,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:45,452 INFO L87 Difference]: Start difference. First operand 467 states and 1462 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:45,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:45,619 INFO L93 Difference]: Finished difference Result 576 states and 1767 transitions. [2021-06-12 20:04:45,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:45,619 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:45,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:45,620 INFO L225 Difference]: With dead ends: 576 [2021-06-12 20:04:45,620 INFO L226 Difference]: Without dead ends: 549 [2021-06-12 20:04:45,620 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:45,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-06-12 20:04:45,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 467. [2021-06-12 20:04:45,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.128755364806867) internal successors, (1458), 466 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:45,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1458 transitions. [2021-06-12 20:04:45,625 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1458 transitions. Word has length 21 [2021-06-12 20:04:45,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:45,625 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1458 transitions. [2021-06-12 20:04:45,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:45,625 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1458 transitions. [2021-06-12 20:04:45,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:45,626 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:45,626 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:45,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 736 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4032 [2021-06-12 20:04:45,826 INFO L430 AbstractCegarLoop]: === Iteration 748 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:45,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:45,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1334879729, now seen corresponding path program 736 times [2021-06-12 20:04:45,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:45,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21988127] [2021-06-12 20:04:45,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:45,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:45,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21988127] [2021-06-12 20:04:45,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21988127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:45,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113955799] [2021-06-12 20:04:45,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 737 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 737 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:45,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:45,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:45,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:45,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:45,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:45,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:45,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:46,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:46,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:46,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:46,016 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:04:46,088 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_206, v_prenex_205], 1=[o_0, o_2]} [2021-06-12 20:04:46,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:46,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:46,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:46,101 INFO L518 ElimStorePlain]: Eliminatee v_prenex_205 vanished before elimination [2021-06-12 20:04:46,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:46,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:46,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:46,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:46,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:46,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:46,114 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:46,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:46,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:46,124 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:43, output treesize:13 [2021-06-12 20:04:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:46,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113955799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:46,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:46,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:04:46,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411719166] [2021-06-12 20:04:46,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:04:46,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:46,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:04:46,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:46,155 INFO L87 Difference]: Start difference. First operand 467 states and 1458 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:46,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:46,366 INFO L93 Difference]: Finished difference Result 598 states and 1840 transitions. [2021-06-12 20:04:46,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:46,366 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:46,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:46,367 INFO L225 Difference]: With dead ends: 598 [2021-06-12 20:04:46,367 INFO L226 Difference]: Without dead ends: 571 [2021-06-12 20:04:46,367 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 178.4ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:04:46,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-12 20:04:46,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 465. [2021-06-12 20:04:46,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.1314655172413794) internal successors, (1453), 464 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:46,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1453 transitions. [2021-06-12 20:04:46,372 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1453 transitions. Word has length 21 [2021-06-12 20:04:46,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:46,372 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1453 transitions. [2021-06-12 20:04:46,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:46,372 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1453 transitions. [2021-06-12 20:04:46,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:46,372 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:46,373 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:46,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4040,737 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:46,573 INFO L430 AbstractCegarLoop]: === Iteration 749 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:46,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:46,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1251191355, now seen corresponding path program 737 times [2021-06-12 20:04:46,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:46,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804588116] [2021-06-12 20:04:46,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:46,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:46,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:46,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804588116] [2021-06-12 20:04:46,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804588116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:46,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650490289] [2021-06-12 20:04:46,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 738 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 738 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:46,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:46,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:46,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:46,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:46,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:46,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:46,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:46,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:46,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:46,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:46,767 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:04:46,800 INFO L446 ElimStorePlain]: Different costs {0=[o_0, o_2], 1=[v_prenex_207, v_prenex_208]} [2021-06-12 20:04:46,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:46,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:46,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:46,816 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:04:46,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:46,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:46,818 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:46,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:46,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:46,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:04:46,831 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:46,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:46,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:46,842 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:51, output treesize:21 [2021-06-12 20:04:46,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:46,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650490289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:46,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:46,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:04:46,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172847931] [2021-06-12 20:04:46,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:04:46,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:46,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:04:46,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:46,877 INFO L87 Difference]: Start difference. First operand 465 states and 1453 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:47,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:47,044 INFO L93 Difference]: Finished difference Result 598 states and 1844 transitions. [2021-06-12 20:04:47,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:47,044 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:47,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:47,045 INFO L225 Difference]: With dead ends: 598 [2021-06-12 20:04:47,045 INFO L226 Difference]: Without dead ends: 569 [2021-06-12 20:04:47,045 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 153.4ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:47,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-06-12 20:04:47,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 465. [2021-06-12 20:04:47,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.1314655172413794) internal successors, (1453), 464 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:47,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1453 transitions. [2021-06-12 20:04:47,050 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1453 transitions. Word has length 21 [2021-06-12 20:04:47,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:47,050 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1453 transitions. [2021-06-12 20:04:47,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:47,050 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1453 transitions. [2021-06-12 20:04:47,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:47,051 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:47,051 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:47,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 738 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4053 [2021-06-12 20:04:47,251 INFO L430 AbstractCegarLoop]: === Iteration 750 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:47,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:47,251 INFO L82 PathProgramCache]: Analyzing trace with hash -953924945, now seen corresponding path program 738 times [2021-06-12 20:04:47,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:47,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442413745] [2021-06-12 20:04:47,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:47,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:47,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:47,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442413745] [2021-06-12 20:04:47,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442413745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:47,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125118151] [2021-06-12 20:04:47,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 739 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 739 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:47,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:04:47,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:47,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:47,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:47,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:47,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:47,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:47,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:47,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 20:04:47,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:47,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:47,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:47,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:47,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:04:47,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:47,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:47,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:47,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:47,494 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:47,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:47,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:47,509 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:65, output treesize:19 [2021-06-12 20:04:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:47,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125118151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:47,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:47,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:04:47,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468398568] [2021-06-12 20:04:47,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:04:47,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:47,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:04:47,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:47,553 INFO L87 Difference]: Start difference. First operand 465 states and 1453 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:47,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:47,703 INFO L93 Difference]: Finished difference Result 563 states and 1730 transitions. [2021-06-12 20:04:47,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:47,703 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:47,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:47,704 INFO L225 Difference]: With dead ends: 563 [2021-06-12 20:04:47,704 INFO L226 Difference]: Without dead ends: 540 [2021-06-12 20:04:47,704 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:47,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-12 20:04:47,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 464. [2021-06-12 20:04:47,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.140388768898488) internal successors, (1454), 463 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:47,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1454 transitions. [2021-06-12 20:04:47,709 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1454 transitions. Word has length 21 [2021-06-12 20:04:47,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:47,709 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1454 transitions. [2021-06-12 20:04:47,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:47,709 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1454 transitions. [2021-06-12 20:04:47,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:47,709 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:47,709 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:47,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4059,739 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:47,910 INFO L430 AbstractCegarLoop]: === Iteration 751 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:47,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:47,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1238187629, now seen corresponding path program 739 times [2021-06-12 20:04:47,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:47,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265963593] [2021-06-12 20:04:47,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:47,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:48,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:48,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265963593] [2021-06-12 20:04:48,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265963593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:48,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066988012] [2021-06-12 20:04:48,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 740 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 740 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:48,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:48,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:48,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:48,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:48,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:48,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:48,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:48,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:48,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:48,115 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:04:48,152 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_209, v_prenex_210], 1=[o_0, o_2]} [2021-06-12 20:04:48,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:48,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:48,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:48,168 INFO L518 ElimStorePlain]: Eliminatee v_prenex_210 vanished before elimination [2021-06-12 20:04:48,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:48,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:48,171 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:48,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:48,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:48,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:48,184 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:48,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:48,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:48,195 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:51, output treesize:19 [2021-06-12 20:04:48,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:48,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066988012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:48,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:48,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:48,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449409567] [2021-06-12 20:04:48,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:48,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:48,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:48,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:48,272 INFO L87 Difference]: Start difference. First operand 464 states and 1454 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:48,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:48,466 INFO L93 Difference]: Finished difference Result 679 states and 2087 transitions. [2021-06-12 20:04:48,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:04:48,467 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:48,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:48,467 INFO L225 Difference]: With dead ends: 679 [2021-06-12 20:04:48,467 INFO L226 Difference]: Without dead ends: 652 [2021-06-12 20:04:48,468 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 234.6ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:48,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-12 20:04:48,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 461. [2021-06-12 20:04:48,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.128260869565217) internal successors, (1439), 460 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:48,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1439 transitions. [2021-06-12 20:04:48,472 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1439 transitions. Word has length 21 [2021-06-12 20:04:48,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:48,473 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1439 transitions. [2021-06-12 20:04:48,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:48,473 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1439 transitions. [2021-06-12 20:04:48,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:48,473 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:48,473 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:48,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 740 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4066 [2021-06-12 20:04:48,674 INFO L430 AbstractCegarLoop]: === Iteration 752 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:48,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:48,674 INFO L82 PathProgramCache]: Analyzing trace with hash -488191473, now seen corresponding path program 740 times [2021-06-12 20:04:48,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:48,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610421084] [2021-06-12 20:04:48,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:48,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:48,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610421084] [2021-06-12 20:04:48,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610421084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:48,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516770572] [2021-06-12 20:04:48,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 741 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 741 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:48,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:48,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:48,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:48,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:48,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:48,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:48,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:48,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:48,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:48,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:48,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:48,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:48,862 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:04:48,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:48,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:48,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:48,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:48,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:48,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:04:48,961 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:48,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:48,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:48,969 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:9 [2021-06-12 20:04:48,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:48,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516770572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:48,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:48,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:04:48,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617847159] [2021-06-12 20:04:48,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:04:48,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:48,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:04:48,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:48,978 INFO L87 Difference]: Start difference. First operand 461 states and 1439 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:49,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:49,198 INFO L93 Difference]: Finished difference Result 554 states and 1707 transitions. [2021-06-12 20:04:49,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:49,198 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:49,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:49,199 INFO L225 Difference]: With dead ends: 554 [2021-06-12 20:04:49,199 INFO L226 Difference]: Without dead ends: 532 [2021-06-12 20:04:49,199 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 155.5ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:49,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-06-12 20:04:49,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 471. [2021-06-12 20:04:49,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.1382978723404253) internal successors, (1475), 470 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:49,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1475 transitions. [2021-06-12 20:04:49,204 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1475 transitions. Word has length 21 [2021-06-12 20:04:49,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:49,204 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1475 transitions. [2021-06-12 20:04:49,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:49,204 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1475 transitions. [2021-06-12 20:04:49,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:49,205 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:49,205 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:49,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 741 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4079 [2021-06-12 20:04:49,405 INFO L430 AbstractCegarLoop]: === Iteration 753 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:49,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:49,405 INFO L82 PathProgramCache]: Analyzing trace with hash -989982809, now seen corresponding path program 741 times [2021-06-12 20:04:49,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:49,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246970260] [2021-06-12 20:04:49,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:49,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:49,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246970260] [2021-06-12 20:04:49,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246970260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:49,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095196446] [2021-06-12 20:04:49,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 742 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 742 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:49,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:04:49,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:49,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:49,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:49,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:49,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:49,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:49,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:49,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:49,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:49,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:49,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:49,596 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:04:49,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:49,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:49,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:49,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:49,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:49,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:04:49,668 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:49,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:49,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:49,677 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:12 [2021-06-12 20:04:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:49,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095196446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:49,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:49,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:04:49,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360594356] [2021-06-12 20:04:49,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:04:49,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:49,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:04:49,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:49,690 INFO L87 Difference]: Start difference. First operand 471 states and 1475 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:49,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:49,897 INFO L93 Difference]: Finished difference Result 563 states and 1731 transitions. [2021-06-12 20:04:49,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:49,897 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:49,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:49,898 INFO L225 Difference]: With dead ends: 563 [2021-06-12 20:04:49,898 INFO L226 Difference]: Without dead ends: 541 [2021-06-12 20:04:49,898 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 142.1ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:49,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-06-12 20:04:49,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 468. [2021-06-12 20:04:49,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.132762312633833) internal successors, (1463), 467 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:49,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1463 transitions. [2021-06-12 20:04:49,902 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1463 transitions. Word has length 21 [2021-06-12 20:04:49,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:49,903 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1463 transitions. [2021-06-12 20:04:49,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:49,903 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1463 transitions. [2021-06-12 20:04:49,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:49,903 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:49,903 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:50,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 742 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4086 [2021-06-12 20:04:50,104 INFO L430 AbstractCegarLoop]: === Iteration 754 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:50,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:50,104 INFO L82 PathProgramCache]: Analyzing trace with hash 137132645, now seen corresponding path program 742 times [2021-06-12 20:04:50,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:50,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973296095] [2021-06-12 20:04:50,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:50,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:50,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:50,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973296095] [2021-06-12 20:04:50,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973296095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:50,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409780858] [2021-06-12 20:04:50,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 743 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 743 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:50,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:50,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:50,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:50,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:50,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:50,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:50,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:50,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:50,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:50,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:50,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:50,307 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:04:50,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:50,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:50,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:50,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:50,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:50,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:50,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:50,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:50,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:50,433 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:7 [2021-06-12 20:04:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:50,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409780858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:50,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:50,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:50,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908636679] [2021-06-12 20:04:50,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:50,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:50,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:50,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:50,461 INFO L87 Difference]: Start difference. First operand 468 states and 1463 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:50,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:50,645 INFO L93 Difference]: Finished difference Result 648 states and 1999 transitions. [2021-06-12 20:04:50,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:50,645 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:50,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:50,646 INFO L225 Difference]: With dead ends: 648 [2021-06-12 20:04:50,646 INFO L226 Difference]: Without dead ends: 629 [2021-06-12 20:04:50,646 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 240.2ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:04:50,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-12 20:04:50,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 474. [2021-06-12 20:04:50,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.141649048625793) internal successors, (1486), 473 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:50,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1486 transitions. [2021-06-12 20:04:50,651 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1486 transitions. Word has length 21 [2021-06-12 20:04:50,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:50,651 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1486 transitions. [2021-06-12 20:04:50,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:50,651 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1486 transitions. [2021-06-12 20:04:50,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:50,652 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:50,652 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:50,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4093,743 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:50,852 INFO L430 AbstractCegarLoop]: === Iteration 755 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:50,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:50,852 INFO L82 PathProgramCache]: Analyzing trace with hash -85075967, now seen corresponding path program 743 times [2021-06-12 20:04:50,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:50,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015920505] [2021-06-12 20:04:50,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:50,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:50,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015920505] [2021-06-12 20:04:50,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015920505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:50,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123828528] [2021-06-12 20:04:50,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 744 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 744 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:50,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:04:50,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:50,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:04:50,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:51,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:51,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:51,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:51,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:51,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:51,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:51,025 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:51,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:51,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:51,055 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-06-12 20:04:51,263 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_4]} [2021-06-12 20:04:51,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:04:51,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:51,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:51,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:51,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-12 20:04:51,271 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:51,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:51,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:51,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:51,275 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:51,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 20:04:51,279 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:51,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:51,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:51,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:51,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-12 20:04:51,311 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:51,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:51,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:51,314 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:51,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:51,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:04:51,343 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:125, output treesize:21 [2021-06-12 20:04:51,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:51,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123828528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:51,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:51,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:51,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145452335] [2021-06-12 20:04:51,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:51,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:51,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:51,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:51,384 INFO L87 Difference]: Start difference. First operand 474 states and 1486 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:51,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:51,746 INFO L93 Difference]: Finished difference Result 759 states and 2318 transitions. [2021-06-12 20:04:51,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:04:51,746 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:51,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:51,747 INFO L225 Difference]: With dead ends: 759 [2021-06-12 20:04:51,747 INFO L226 Difference]: Without dead ends: 699 [2021-06-12 20:04:51,747 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 347.8ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:04:51,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-06-12 20:04:51,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 474. [2021-06-12 20:04:51,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.13107822410148) internal successors, (1481), 473 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:51,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1481 transitions. [2021-06-12 20:04:51,752 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1481 transitions. Word has length 21 [2021-06-12 20:04:51,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:51,752 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1481 transitions. [2021-06-12 20:04:51,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:51,752 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1481 transitions. [2021-06-12 20:04:51,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:51,753 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:51,753 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:51,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 744 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4100 [2021-06-12 20:04:51,953 INFO L430 AbstractCegarLoop]: === Iteration 756 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:51,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:51,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1823524485, now seen corresponding path program 744 times [2021-06-12 20:04:51,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:51,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926943035] [2021-06-12 20:04:51,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:52,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:52,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926943035] [2021-06-12 20:04:52,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926943035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:52,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951325577] [2021-06-12 20:04:52,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 745 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 745 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:52,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:04:52,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:52,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:52,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:52,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:52,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:52,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:52,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:52,137 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:52,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:52,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:52,156 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:04:52,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:52,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:52,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:52,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:52,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:52,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:52,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:52,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:52,267 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:52,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:52,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:52,282 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:13 [2021-06-12 20:04:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:52,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951325577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:52,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:52,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:52,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986530049] [2021-06-12 20:04:52,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:52,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:52,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:52,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:52,329 INFO L87 Difference]: Start difference. First operand 474 states and 1481 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:52,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:52,522 INFO L93 Difference]: Finished difference Result 671 states and 2081 transitions. [2021-06-12 20:04:52,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:52,523 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:52,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:52,524 INFO L225 Difference]: With dead ends: 671 [2021-06-12 20:04:52,524 INFO L226 Difference]: Without dead ends: 648 [2021-06-12 20:04:52,524 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 207.8ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:04:52,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-06-12 20:04:52,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 472. [2021-06-12 20:04:52,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.1337579617834397) internal successors, (1476), 471 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:52,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1476 transitions. [2021-06-12 20:04:52,529 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1476 transitions. Word has length 21 [2021-06-12 20:04:52,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:52,529 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1476 transitions. [2021-06-12 20:04:52,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:52,529 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1476 transitions. [2021-06-12 20:04:52,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:52,530 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:52,530 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:52,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 745 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4116 [2021-06-12 20:04:52,730 INFO L430 AbstractCegarLoop]: === Iteration 757 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:52,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:52,730 INFO L82 PathProgramCache]: Analyzing trace with hash -174603897, now seen corresponding path program 745 times [2021-06-12 20:04:52,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:52,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402513601] [2021-06-12 20:04:52,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:52,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:52,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:52,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:52,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402513601] [2021-06-12 20:04:52,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402513601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:52,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496585227] [2021-06-12 20:04:52,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 746 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 746 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:52,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:52,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:52,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:52,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:52,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:52,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:52,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:52,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:52,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:52,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:52,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:52,929 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:04:52,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:52,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:53,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:53,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:53,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:53,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:53,011 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:53,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:53,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:53,019 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:10 [2021-06-12 20:04:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:53,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496585227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:53,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:53,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:53,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002172196] [2021-06-12 20:04:53,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:53,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:53,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:53,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:53,061 INFO L87 Difference]: Start difference. First operand 472 states and 1476 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:53,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:53,294 INFO L93 Difference]: Finished difference Result 640 states and 1974 transitions. [2021-06-12 20:04:53,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:53,294 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:53,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:53,295 INFO L225 Difference]: With dead ends: 640 [2021-06-12 20:04:53,295 INFO L226 Difference]: Without dead ends: 621 [2021-06-12 20:04:53,295 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 197.2ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:04:53,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-12 20:04:53,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 468. [2021-06-12 20:04:53,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.126338329764454) internal successors, (1460), 467 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:53,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1460 transitions. [2021-06-12 20:04:53,300 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1460 transitions. Word has length 21 [2021-06-12 20:04:53,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:53,300 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1460 transitions. [2021-06-12 20:04:53,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:53,300 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1460 transitions. [2021-06-12 20:04:53,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:53,301 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:53,301 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:53,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 746 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4130 [2021-06-12 20:04:53,501 INFO L430 AbstractCegarLoop]: === Iteration 758 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:53,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:53,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1903565785, now seen corresponding path program 746 times [2021-06-12 20:04:53,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:53,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085173326] [2021-06-12 20:04:53,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:53,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:53,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085173326] [2021-06-12 20:04:53,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085173326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:53,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881968051] [2021-06-12 20:04:53,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 747 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 747 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:53,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:53,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:53,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:53,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:53,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:53,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:53,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:53,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:53,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:53,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:53,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:53,691 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:04:53,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:53,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:53,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:53,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:53,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:53,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:53,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:53,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:04:53,796 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:53,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:53,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:53,810 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:15 [2021-06-12 20:04:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:53,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881968051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:53,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:53,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:04:53,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518287717] [2021-06-12 20:04:53,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:04:53,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:53,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:04:53,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:53,836 INFO L87 Difference]: Start difference. First operand 468 states and 1460 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:54,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:54,033 INFO L93 Difference]: Finished difference Result 599 states and 1846 transitions. [2021-06-12 20:04:54,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:54,034 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:54,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:54,034 INFO L225 Difference]: With dead ends: 599 [2021-06-12 20:04:54,034 INFO L226 Difference]: Without dead ends: 570 [2021-06-12 20:04:54,034 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 160.6ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:54,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-12 20:04:54,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 468. [2021-06-12 20:04:54,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.126338329764454) internal successors, (1460), 467 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:54,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1460 transitions. [2021-06-12 20:04:54,039 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1460 transitions. Word has length 21 [2021-06-12 20:04:54,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:54,039 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1460 transitions. [2021-06-12 20:04:54,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:54,039 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1460 transitions. [2021-06-12 20:04:54,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:54,040 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:54,040 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:54,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 747 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4134 [2021-06-12 20:04:54,240 INFO L430 AbstractCegarLoop]: === Iteration 759 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:54,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:54,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1296702593, now seen corresponding path program 747 times [2021-06-12 20:04:54,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:54,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209766799] [2021-06-12 20:04:54,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:54,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:54,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:54,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:54,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209766799] [2021-06-12 20:04:54,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209766799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:54,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280131880] [2021-06-12 20:04:54,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 748 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 748 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:54,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:04:54,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:54,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:54,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:54,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:54,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:54,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:54,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:54,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:54,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 20:04:54,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:54,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:54,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:54,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:54,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:04:54,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:54,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:54,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:54,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:54,500 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:54,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:54,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:54,514 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:61, output treesize:13 [2021-06-12 20:04:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:54,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280131880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:54,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:54,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:04:54,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619824010] [2021-06-12 20:04:54,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:04:54,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:54,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:04:54,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:54,532 INFO L87 Difference]: Start difference. First operand 468 states and 1460 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:54,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:54,702 INFO L93 Difference]: Finished difference Result 562 states and 1729 transitions. [2021-06-12 20:04:54,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:54,702 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:54,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:54,703 INFO L225 Difference]: With dead ends: 562 [2021-06-12 20:04:54,703 INFO L226 Difference]: Without dead ends: 535 [2021-06-12 20:04:54,703 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 146.2ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:54,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-12 20:04:54,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 465. [2021-06-12 20:04:54,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.1293103448275863) internal successors, (1452), 464 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:54,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1452 transitions. [2021-06-12 20:04:54,707 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1452 transitions. Word has length 21 [2021-06-12 20:04:54,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:54,707 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1452 transitions. [2021-06-12 20:04:54,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:54,708 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1452 transitions. [2021-06-12 20:04:54,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:54,708 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:54,708 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:54,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4148,748 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:54,909 INFO L430 AbstractCegarLoop]: === Iteration 760 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:54,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:54,909 INFO L82 PathProgramCache]: Analyzing trace with hash 672416829, now seen corresponding path program 748 times [2021-06-12 20:04:54,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:54,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538746737] [2021-06-12 20:04:54,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:54,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:54,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538746737] [2021-06-12 20:04:54,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538746737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:54,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23579531] [2021-06-12 20:04:54,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 749 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 749 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:55,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:55,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:55,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:55,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:55,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:55,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:55,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:55,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:55,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:55,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:55,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:55,101 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:04:55,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:55,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:55,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:55,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:55,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:55,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:55,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:55,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:55,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:04:55,167 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:55,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:55,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:55,184 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:65, output treesize:21 [2021-06-12 20:04:55,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:55,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23579531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:55,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:55,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:04:55,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033056323] [2021-06-12 20:04:55,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:04:55,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:55,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:04:55,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:55,219 INFO L87 Difference]: Start difference. First operand 465 states and 1452 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:55,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:55,412 INFO L93 Difference]: Finished difference Result 602 states and 1854 transitions. [2021-06-12 20:04:55,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:55,412 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:55,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:55,413 INFO L225 Difference]: With dead ends: 602 [2021-06-12 20:04:55,413 INFO L226 Difference]: Without dead ends: 573 [2021-06-12 20:04:55,413 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 142.1ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:55,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-06-12 20:04:55,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 465. [2021-06-12 20:04:55,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.1293103448275863) internal successors, (1452), 464 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:55,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1452 transitions. [2021-06-12 20:04:55,418 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1452 transitions. Word has length 21 [2021-06-12 20:04:55,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:55,418 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1452 transitions. [2021-06-12 20:04:55,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:55,418 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1452 transitions. [2021-06-12 20:04:55,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:55,418 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:55,418 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:55,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 749 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4155 [2021-06-12 20:04:55,619 INFO L430 AbstractCegarLoop]: === Iteration 761 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:55,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:55,619 INFO L82 PathProgramCache]: Analyzing trace with hash 969683239, now seen corresponding path program 749 times [2021-06-12 20:04:55,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:55,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641154109] [2021-06-12 20:04:55,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:55,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:55,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:55,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641154109] [2021-06-12 20:04:55,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641154109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:55,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313055649] [2021-06-12 20:04:55,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 750 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 750 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:55,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:04:55,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:55,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:04:55,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:55,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:55,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:55,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:55,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:55,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:55,816 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:55,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:55,820 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:55,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:55,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:55,823 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:55,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:55,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-06-12 20:04:55,868 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:145, output treesize:97 [2021-06-12 20:04:55,950 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_4]} [2021-06-12 20:04:55,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:55,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:55,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:55,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:55,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:55,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:55,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:55,962 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:55,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:55,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:55,965 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:56,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:56,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:56,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:56,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:56,012 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:56,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:56,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:56,016 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:56,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:56,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:04:56,059 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:153, output treesize:57 [2021-06-12 20:04:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:56,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313055649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:56,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:56,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:56,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329523578] [2021-06-12 20:04:56,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:56,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:56,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:56,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:56,174 INFO L87 Difference]: Start difference. First operand 465 states and 1452 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:56,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:56,633 INFO L93 Difference]: Finished difference Result 745 states and 2288 transitions. [2021-06-12 20:04:56,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:04:56,634 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:56,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:56,635 INFO L225 Difference]: With dead ends: 745 [2021-06-12 20:04:56,635 INFO L226 Difference]: Without dead ends: 703 [2021-06-12 20:04:56,635 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 488.3ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:04:56,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-06-12 20:04:56,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 466. [2021-06-12 20:04:56,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.1354838709677417) internal successors, (1458), 465 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:56,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1458 transitions. [2021-06-12 20:04:56,640 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1458 transitions. Word has length 21 [2021-06-12 20:04:56,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:56,640 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1458 transitions. [2021-06-12 20:04:56,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:56,640 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1458 transitions. [2021-06-12 20:04:56,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:56,641 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:56,641 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:56,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 750 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4164 [2021-06-12 20:04:56,841 INFO L430 AbstractCegarLoop]: === Iteration 762 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:56,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:56,841 INFO L82 PathProgramCache]: Analyzing trace with hash 685420555, now seen corresponding path program 750 times [2021-06-12 20:04:56,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:56,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171829613] [2021-06-12 20:04:56,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:56,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:56,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:56,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:56,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171829613] [2021-06-12 20:04:56,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171829613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:56,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192020665] [2021-06-12 20:04:56,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 751 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 751 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:56,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:04:56,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:56,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:56,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:57,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:57,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:57,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:57,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:57,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:57,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 20:04:57,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:57,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:57,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:57,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:57,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:04:57,069 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:57,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:57,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:57,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:57,090 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:57,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:57,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:57,107 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:67, output treesize:19 [2021-06-12 20:04:57,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:57,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192020665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:57,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:57,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:57,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733637034] [2021-06-12 20:04:57,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:57,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:57,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:57,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:57,184 INFO L87 Difference]: Start difference. First operand 466 states and 1458 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:57,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:57,392 INFO L93 Difference]: Finished difference Result 652 states and 1999 transitions. [2021-06-12 20:04:57,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:04:57,393 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:57,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:57,393 INFO L225 Difference]: With dead ends: 652 [2021-06-12 20:04:57,393 INFO L226 Difference]: Without dead ends: 625 [2021-06-12 20:04:57,394 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 213.7ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:57,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-06-12 20:04:57,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 464. [2021-06-12 20:04:57,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.125269978401728) internal successors, (1447), 463 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:57,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1447 transitions. [2021-06-12 20:04:57,399 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1447 transitions. Word has length 21 [2021-06-12 20:04:57,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:57,399 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1447 transitions. [2021-06-12 20:04:57,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:57,399 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1447 transitions. [2021-06-12 20:04:57,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:57,399 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:57,399 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:57,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 751 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4173 [2021-06-12 20:04:57,600 INFO L430 AbstractCegarLoop]: === Iteration 763 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:57,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:57,600 INFO L82 PathProgramCache]: Analyzing trace with hash 2140903215, now seen corresponding path program 751 times [2021-06-12 20:04:57,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:57,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615477099] [2021-06-12 20:04:57,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:57,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:57,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:57,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615477099] [2021-06-12 20:04:57,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615477099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:57,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338891501] [2021-06-12 20:04:57,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 752 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 752 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:57,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:57,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:57,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:57,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:57,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:57,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:57,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:57,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 20:04:57,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:57,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:57,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:57,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:57,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:57,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:57,832 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:57,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:57,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:57,841 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:10 [2021-06-12 20:04:57,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:57,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338891501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:57,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:57,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:04:57,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969680858] [2021-06-12 20:04:57,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:04:57,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:57,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:04:57,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:57,853 INFO L87 Difference]: Start difference. First operand 464 states and 1447 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:57,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:57,958 INFO L93 Difference]: Finished difference Result 543 states and 1673 transitions. [2021-06-12 20:04:57,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:57,958 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:57,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:57,959 INFO L225 Difference]: With dead ends: 543 [2021-06-12 20:04:57,959 INFO L226 Difference]: Without dead ends: 524 [2021-06-12 20:04:57,959 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 141.5ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:57,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-06-12 20:04:57,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 460. [2021-06-12 20:04:57,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.1263616557734206) internal successors, (1435), 459 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:57,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1435 transitions. [2021-06-12 20:04:57,963 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1435 transitions. Word has length 21 [2021-06-12 20:04:57,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:57,963 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1435 transitions. [2021-06-12 20:04:57,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:57,963 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1435 transitions. [2021-06-12 20:04:57,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:57,964 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:57,964 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:58,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 752 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4185 [2021-06-12 20:04:58,165 INFO L430 AbstractCegarLoop]: === Iteration 764 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:58,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:58,165 INFO L82 PathProgramCache]: Analyzing trace with hash 82692239, now seen corresponding path program 752 times [2021-06-12 20:04:58,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:58,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993796270] [2021-06-12 20:04:58,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:58,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:58,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993796270] [2021-06-12 20:04:58,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993796270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:58,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057835162] [2021-06-12 20:04:58,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 753 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 753 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:58,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:58,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:58,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:58,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:58,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:58,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:58,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:58,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:58,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:58,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:28 [2021-06-12 20:04:58,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:04:58,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:58,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:58,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:04:58,452 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:58,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:58,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:58,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:04:58,475 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:58,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:58,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:58,494 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:15 [2021-06-12 20:04:58,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:58,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057835162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:58,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:58,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:04:58,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736567504] [2021-06-12 20:04:58,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:04:58,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:58,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:04:58,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:58,517 INFO L87 Difference]: Start difference. First operand 460 states and 1435 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:58,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:58,678 INFO L93 Difference]: Finished difference Result 564 states and 1735 transitions. [2021-06-12 20:04:58,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:04:58,678 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:58,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:58,679 INFO L225 Difference]: With dead ends: 564 [2021-06-12 20:04:58,679 INFO L226 Difference]: Without dead ends: 528 [2021-06-12 20:04:58,679 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:04:58,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-12 20:04:58,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 460. [2021-06-12 20:04:58,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.1263616557734206) internal successors, (1435), 459 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:58,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1435 transitions. [2021-06-12 20:04:58,684 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1435 transitions. Word has length 21 [2021-06-12 20:04:58,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:58,684 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1435 transitions. [2021-06-12 20:04:58,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:58,684 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1435 transitions. [2021-06-12 20:04:58,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:58,684 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:58,685 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:58,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4187,753 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:58,885 INFO L430 AbstractCegarLoop]: === Iteration 765 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:58,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:58,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1012006679, now seen corresponding path program 753 times [2021-06-12 20:04:58,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:58,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695176348] [2021-06-12 20:04:58,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:58,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:58,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:58,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695176348] [2021-06-12 20:04:58,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695176348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:58,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389483783] [2021-06-12 20:04:58,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 754 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 754 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:58,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:04:58,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:58,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:58,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:59,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:59,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:59,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:59,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:59,080 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:59,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:59,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:59,092 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:31 [2021-06-12 20:04:59,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:59,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:59,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:59,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:59,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:59,141 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:59,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:59,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:59,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:59,158 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:59,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:59,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:59,173 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:13 [2021-06-12 20:04:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:59,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389483783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:59,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:59,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:04:59,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427567781] [2021-06-12 20:04:59,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:04:59,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:59,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:04:59,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:59,202 INFO L87 Difference]: Start difference. First operand 460 states and 1435 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:59,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:59,421 INFO L93 Difference]: Finished difference Result 605 states and 1854 transitions. [2021-06-12 20:04:59,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:59,422 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:04:59,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:59,423 INFO L225 Difference]: With dead ends: 605 [2021-06-12 20:04:59,423 INFO L226 Difference]: Without dead ends: 578 [2021-06-12 20:04:59,423 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 178.7ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:59,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-12 20:04:59,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 475. [2021-06-12 20:04:59,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.1244725738396624) internal successors, (1481), 474 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:59,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1481 transitions. [2021-06-12 20:04:59,428 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1481 transitions. Word has length 21 [2021-06-12 20:04:59,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:59,428 INFO L482 AbstractCegarLoop]: Abstraction has 475 states and 1481 transitions. [2021-06-12 20:04:59,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:59,428 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1481 transitions. [2021-06-12 20:04:59,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:04:59,428 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:59,429 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:59,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 754 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4193 [2021-06-12 20:04:59,629 INFO L430 AbstractCegarLoop]: === Iteration 766 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:59,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:59,629 INFO L82 PathProgramCache]: Analyzing trace with hash 868746259, now seen corresponding path program 754 times [2021-06-12 20:04:59,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:59,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046196400] [2021-06-12 20:04:59,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:59,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:59,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046196400] [2021-06-12 20:04:59,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046196400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:59,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282546208] [2021-06-12 20:04:59,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 755 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 755 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:59,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:59,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:59,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:04:59,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:59,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:59,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:59,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:59,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:59,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:59,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:59,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:59,832 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:31 [2021-06-12 20:04:59,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:59,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:59,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:59,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:59,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:59,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:04:59,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:59,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:59,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:59,900 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:7 [2021-06-12 20:04:59,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:59,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282546208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:59,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:59,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:04:59,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974154452] [2021-06-12 20:04:59,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:04:59,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:59,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:04:59,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:59,910 INFO L87 Difference]: Start difference. First operand 475 states and 1481 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:00,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:00,107 INFO L93 Difference]: Finished difference Result 555 states and 1701 transitions. [2021-06-12 20:05:00,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:00,107 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:00,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:00,108 INFO L225 Difference]: With dead ends: 555 [2021-06-12 20:05:00,108 INFO L226 Difference]: Without dead ends: 534 [2021-06-12 20:05:00,108 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 151.3ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:05:00,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-12 20:05:00,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 457. [2021-06-12 20:05:00,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 3.129385964912281) internal successors, (1427), 456 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:00,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1427 transitions. [2021-06-12 20:05:00,113 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1427 transitions. Word has length 21 [2021-06-12 20:05:00,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:00,113 INFO L482 AbstractCegarLoop]: Abstraction has 457 states and 1427 transitions. [2021-06-12 20:05:00,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:00,113 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1427 transitions. [2021-06-12 20:05:00,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:00,113 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:00,113 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:00,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4204,755 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:00,314 INFO L430 AbstractCegarLoop]: === Iteration 767 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:00,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:00,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1521039301, now seen corresponding path program 755 times [2021-06-12 20:05:00,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:00,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696366694] [2021-06-12 20:05:00,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:00,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:00,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696366694] [2021-06-12 20:05:00,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696366694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:00,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753356040] [2021-06-12 20:05:00,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 756 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 756 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:00,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:05:00,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:00,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:00,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:00,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:00,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:00,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:00,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:00,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:00,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:31 [2021-06-12 20:05:00,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:00,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:00,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:05:00,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:00,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:05:00,524 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:00,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:00,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:00,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:05:00,545 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:00,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:00,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:00,562 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:65, output treesize:21 [2021-06-12 20:05:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:00,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753356040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:00,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:00,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:05:00,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308883791] [2021-06-12 20:05:00,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:00,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:00,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:00,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:00,597 INFO L87 Difference]: Start difference. First operand 457 states and 1427 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:00,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:00,736 INFO L93 Difference]: Finished difference Result 579 states and 1775 transitions. [2021-06-12 20:05:00,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:00,736 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:00,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:00,737 INFO L225 Difference]: With dead ends: 579 [2021-06-12 20:05:00,737 INFO L226 Difference]: Without dead ends: 543 [2021-06-12 20:05:00,737 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 130.6ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:00,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-12 20:05:00,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 458. [2021-06-12 20:05:00,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.1334792122538295) internal successors, (1432), 457 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:00,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1432 transitions. [2021-06-12 20:05:00,742 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1432 transitions. Word has length 21 [2021-06-12 20:05:00,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:00,742 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1432 transitions. [2021-06-12 20:05:00,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:00,742 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1432 transitions. [2021-06-12 20:05:00,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:00,742 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:00,742 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:00,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 756 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4210 [2021-06-12 20:05:00,943 INFO L430 AbstractCegarLoop]: === Iteration 768 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:00,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:00,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1818305711, now seen corresponding path program 756 times [2021-06-12 20:05:00,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:00,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165547940] [2021-06-12 20:05:00,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:00,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:01,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:01,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:01,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165547940] [2021-06-12 20:05:01,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165547940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:01,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085253770] [2021-06-12 20:05:01,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 757 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 757 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:01,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:05:01,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:01,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:01,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:01,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:01,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:01,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:01,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:01,114 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:01,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:01,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:05:01,132 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:05:01,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:01,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:01,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:01,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:01,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:01,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:01,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:01,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:01,199 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:01,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:01,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:01,216 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:67, output treesize:19 [2021-06-12 20:05:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:01,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085253770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:01,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:01,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:05:01,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940522390] [2021-06-12 20:05:01,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:05:01,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:01,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:05:01,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:01,240 INFO L87 Difference]: Start difference. First operand 458 states and 1432 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:01,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:01,402 INFO L93 Difference]: Finished difference Result 664 states and 2027 transitions. [2021-06-12 20:05:01,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:01,402 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:01,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:01,403 INFO L225 Difference]: With dead ends: 664 [2021-06-12 20:05:01,403 INFO L226 Difference]: Without dead ends: 641 [2021-06-12 20:05:01,403 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:01,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-06-12 20:05:01,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 473. [2021-06-12 20:05:01,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.1504237288135593) internal successors, (1487), 472 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:01,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1487 transitions. [2021-06-12 20:05:01,408 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1487 transitions. Word has length 21 [2021-06-12 20:05:01,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:01,408 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1487 transitions. [2021-06-12 20:05:01,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:01,408 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1487 transitions. [2021-06-12 20:05:01,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:01,409 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:01,409 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:01,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 757 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4216 [2021-06-12 20:05:01,609 INFO L430 AbstractCegarLoop]: === Iteration 769 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:01,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:01,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1534043027, now seen corresponding path program 757 times [2021-06-12 20:05:01,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:01,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556283691] [2021-06-12 20:05:01,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:01,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:01,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:01,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556283691] [2021-06-12 20:05:01,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556283691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:01,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269228123] [2021-06-12 20:05:01,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 758 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 758 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:01,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:01,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:01,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:01,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:01,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:01,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:01,805 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:01,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:01,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:05:01,820 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:05:01,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:01,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:01,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:01,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:01,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:01,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:01,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:01,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:01,886 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:01,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:01,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:01,904 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:65, output treesize:19 [2021-06-12 20:05:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:01,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269228123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:01,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:01,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:01,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190693956] [2021-06-12 20:05:01,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:01,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:01,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:01,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:01,980 INFO L87 Difference]: Start difference. First operand 473 states and 1487 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:02,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:02,211 INFO L93 Difference]: Finished difference Result 730 states and 2226 transitions. [2021-06-12 20:05:02,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:05:02,211 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:02,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:02,212 INFO L225 Difference]: With dead ends: 730 [2021-06-12 20:05:02,212 INFO L226 Difference]: Without dead ends: 703 [2021-06-12 20:05:02,212 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 251.5ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:05:02,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-06-12 20:05:02,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 491. [2021-06-12 20:05:02,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.157142857142857) internal successors, (1547), 490 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:02,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1547 transitions. [2021-06-12 20:05:02,217 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1547 transitions. Word has length 21 [2021-06-12 20:05:02,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:02,217 INFO L482 AbstractCegarLoop]: Abstraction has 491 states and 1547 transitions. [2021-06-12 20:05:02,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:02,217 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1547 transitions. [2021-06-12 20:05:02,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:02,218 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:02,218 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:02,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4223,758 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:02,418 INFO L430 AbstractCegarLoop]: === Iteration 770 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:02,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:02,419 INFO L82 PathProgramCache]: Analyzing trace with hash -426703939, now seen corresponding path program 758 times [2021-06-12 20:05:02,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:02,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953990627] [2021-06-12 20:05:02,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:02,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:02,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:02,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953990627] [2021-06-12 20:05:02,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953990627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:02,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000066419] [2021-06-12 20:05:02,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 759 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 759 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:02,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:02,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:02,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:02,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:02,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:02,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:02,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:02,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:02,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:02,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:02,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:05:02,628 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:05:02,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:02,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:02,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:02,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:02,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:02,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:02,697 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:02,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:02,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:02,706 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:10 [2021-06-12 20:05:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:02,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000066419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:02,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:02,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:02,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708041403] [2021-06-12 20:05:02,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:02,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:02,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:02,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:02,752 INFO L87 Difference]: Start difference. First operand 491 states and 1547 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:02,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:02,904 INFO L93 Difference]: Finished difference Result 670 states and 2062 transitions. [2021-06-12 20:05:02,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:05:02,904 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:02,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:02,905 INFO L225 Difference]: With dead ends: 670 [2021-06-12 20:05:02,905 INFO L226 Difference]: Without dead ends: 651 [2021-06-12 20:05:02,905 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 204.9ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:05:02,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-06-12 20:05:02,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 477. [2021-06-12 20:05:02,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.1470588235294117) internal successors, (1498), 476 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:02,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1498 transitions. [2021-06-12 20:05:02,910 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1498 transitions. Word has length 21 [2021-06-12 20:05:02,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:02,910 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1498 transitions. [2021-06-12 20:05:02,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:02,910 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1498 transitions. [2021-06-12 20:05:02,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:02,911 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:02,911 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:03,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 759 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4237 [2021-06-12 20:05:03,111 INFO L430 AbstractCegarLoop]: === Iteration 771 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:03,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:03,112 INFO L82 PathProgramCache]: Analyzing trace with hash 118668715, now seen corresponding path program 759 times [2021-06-12 20:05:03,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:03,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439638741] [2021-06-12 20:05:03,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:03,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:03,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439638741] [2021-06-12 20:05:03,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439638741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:03,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048262035] [2021-06-12 20:05:03,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 760 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 760 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:03,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:05:03,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:03,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:03,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:03,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:03,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:03,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:03,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:03,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:03,287 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:03,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:03,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:05:03,301 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:05:03,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:03,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:03,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:03,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:03,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:03,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:03,420 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:03,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:03,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:03,427 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:7 [2021-06-12 20:05:03,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:03,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048262035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:03,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:03,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:05:03,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187746914] [2021-06-12 20:05:03,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:05:03,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:03,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:05:03,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:05:03,438 INFO L87 Difference]: Start difference. First operand 477 states and 1498 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:03,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:03,596 INFO L93 Difference]: Finished difference Result 586 states and 1790 transitions. [2021-06-12 20:05:03,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:03,596 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:03,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:03,597 INFO L225 Difference]: With dead ends: 586 [2021-06-12 20:05:03,597 INFO L226 Difference]: Without dead ends: 565 [2021-06-12 20:05:03,597 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 186.7ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:05:03,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-12 20:05:03,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 473. [2021-06-12 20:05:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.1483050847457625) internal successors, (1486), 472 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:03,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1486 transitions. [2021-06-12 20:05:03,602 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1486 transitions. Word has length 21 [2021-06-12 20:05:03,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:03,602 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1486 transitions. [2021-06-12 20:05:03,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:03,602 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1486 transitions. [2021-06-12 20:05:03,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:03,603 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:03,603 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:03,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 760 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4241 [2021-06-12 20:05:03,803 INFO L430 AbstractCegarLoop]: === Iteration 772 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:03,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:03,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1600315967, now seen corresponding path program 760 times [2021-06-12 20:05:03,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:03,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626501708] [2021-06-12 20:05:03,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:03,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:03,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:03,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:03,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626501708] [2021-06-12 20:05:03,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626501708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:03,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894019604] [2021-06-12 20:05:03,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 761 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 761 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:03,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:03,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:03,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:03,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:03,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:03,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:03,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:03,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:03,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:03,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:04,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:04,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:05:04,003 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:05:04,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:04,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:04,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:04,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:04,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:04,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:04,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:04,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:04,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:04,078 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:10 [2021-06-12 20:05:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:04,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894019604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:04,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:04,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:04,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753799912] [2021-06-12 20:05:04,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:04,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:04,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:04,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:04,124 INFO L87 Difference]: Start difference. First operand 473 states and 1486 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:04,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:04,353 INFO L93 Difference]: Finished difference Result 645 states and 1979 transitions. [2021-06-12 20:05:04,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:05:04,354 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:04,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:04,355 INFO L225 Difference]: With dead ends: 645 [2021-06-12 20:05:04,355 INFO L226 Difference]: Without dead ends: 624 [2021-06-12 20:05:04,355 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:05:04,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-06-12 20:05:04,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 456. [2021-06-12 20:05:04,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.1274725274725275) internal successors, (1423), 455 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:04,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1423 transitions. [2021-06-12 20:05:04,359 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1423 transitions. Word has length 21 [2021-06-12 20:05:04,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:04,360 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1423 transitions. [2021-06-12 20:05:04,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:04,360 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1423 transitions. [2021-06-12 20:05:04,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:04,360 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:04,360 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:04,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4252,761 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:04,561 INFO L430 AbstractCegarLoop]: === Iteration 773 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:04,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:04,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1531311151, now seen corresponding path program 761 times [2021-06-12 20:05:04,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:04,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636099066] [2021-06-12 20:05:04,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:04,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:04,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:04,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636099066] [2021-06-12 20:05:04,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636099066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:04,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999108334] [2021-06-12 20:05:04,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 762 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 762 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:04,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:05:04,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:04,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:04,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:04,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:04,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:04,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:04,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:04,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:04,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:05:04,741 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:05:04,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:04,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:04,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:04,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:04,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:04,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:05:04,805 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:04,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:04,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:04,811 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:12 [2021-06-12 20:05:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:04,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999108334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:04,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:04,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:05:04,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781157036] [2021-06-12 20:05:04,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:04,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:04,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:04,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:04,825 INFO L87 Difference]: Start difference. First operand 456 states and 1423 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:04,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:04,970 INFO L93 Difference]: Finished difference Result 543 states and 1674 transitions. [2021-06-12 20:05:04,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:04,970 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:04,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:04,971 INFO L225 Difference]: With dead ends: 543 [2021-06-12 20:05:04,971 INFO L226 Difference]: Without dead ends: 521 [2021-06-12 20:05:04,971 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:04,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-12 20:05:04,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 462. [2021-06-12 20:05:04,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.1323210412147504) internal successors, (1444), 461 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:04,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1444 transitions. [2021-06-12 20:05:04,976 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1444 transitions. Word has length 21 [2021-06-12 20:05:04,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:04,976 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1444 transitions. [2021-06-12 20:05:04,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:04,976 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1444 transitions. [2021-06-12 20:05:04,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:04,976 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:04,977 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:05,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4258,762 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:05,177 INFO L430 AbstractCegarLoop]: === Iteration 774 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:05,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:05,177 INFO L82 PathProgramCache]: Analyzing trace with hash -2138332027, now seen corresponding path program 762 times [2021-06-12 20:05:05,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:05,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073149002] [2021-06-12 20:05:05,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:05,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:05,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073149002] [2021-06-12 20:05:05,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073149002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:05,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857093619] [2021-06-12 20:05:05,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 763 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 763 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:05,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:05:05,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:05,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:05,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:05,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:05,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:05,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:05,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:05,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 20:05:05,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:05:05,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:05,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:05,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:05,422 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:05,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:05,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:05,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:05,437 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:05,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:05,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:05,449 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:13 [2021-06-12 20:05:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:05,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857093619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:05,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:05,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:05,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091247072] [2021-06-12 20:05:05,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:05,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:05,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:05,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:05,496 INFO L87 Difference]: Start difference. First operand 462 states and 1444 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:05,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:05,701 INFO L93 Difference]: Finished difference Result 614 states and 1892 transitions. [2021-06-12 20:05:05,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:05:05,702 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:05,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:05,703 INFO L225 Difference]: With dead ends: 614 [2021-06-12 20:05:05,703 INFO L226 Difference]: Without dead ends: 587 [2021-06-12 20:05:05,703 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 189.4ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:05:05,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-06-12 20:05:05,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 462. [2021-06-12 20:05:05,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.1279826464208242) internal successors, (1442), 461 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:05,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1442 transitions. [2021-06-12 20:05:05,708 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1442 transitions. Word has length 21 [2021-06-12 20:05:05,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:05,708 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1442 transitions. [2021-06-12 20:05:05,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:05,708 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1442 transitions. [2021-06-12 20:05:05,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:05,709 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:05,709 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:05,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 763 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4263 [2021-06-12 20:05:05,909 INFO L430 AbstractCegarLoop]: === Iteration 775 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:05,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:05,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1872372585, now seen corresponding path program 763 times [2021-06-12 20:05:05,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:05,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404989888] [2021-06-12 20:05:05,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:06,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:06,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404989888] [2021-06-12 20:05:06,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404989888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:06,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660225071] [2021-06-12 20:05:06,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 764 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 764 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:06,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:06,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:06,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:06,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:06,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:06,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:06,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:06,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:05:06,112 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:05:06,191 INFO L446 ElimStorePlain]: Different costs {0=[o_0, o_2], 1=[v_prenex_215, v_prenex_216]} [2021-06-12 20:05:06,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:06,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:06,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:06,204 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:05:06,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:06,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:06,212 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:06,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:06,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:06,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:06,223 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:06,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:06,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:06,232 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:43, output treesize:13 [2021-06-12 20:05:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:06,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660225071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:06,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:06,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:06,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214151316] [2021-06-12 20:05:06,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:06,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:06,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:06,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:06,284 INFO L87 Difference]: Start difference. First operand 462 states and 1442 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:06,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:06,519 INFO L93 Difference]: Finished difference Result 686 states and 2102 transitions. [2021-06-12 20:05:06,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:05:06,520 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:06,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:06,521 INFO L225 Difference]: With dead ends: 686 [2021-06-12 20:05:06,521 INFO L226 Difference]: Without dead ends: 659 [2021-06-12 20:05:06,521 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 225.9ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:05:06,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-06-12 20:05:06,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 476. [2021-06-12 20:05:06,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.126315789473684) internal successors, (1485), 475 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:06,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1485 transitions. [2021-06-12 20:05:06,526 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1485 transitions. Word has length 21 [2021-06-12 20:05:06,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:06,526 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1485 transitions. [2021-06-12 20:05:06,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:06,526 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1485 transitions. [2021-06-12 20:05:06,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:06,527 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:06,527 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:06,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 764 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4271 [2021-06-12 20:05:06,727 INFO L430 AbstractCegarLoop]: === Iteration 776 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:06,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:06,727 INFO L82 PathProgramCache]: Analyzing trace with hash -736202871, now seen corresponding path program 764 times [2021-06-12 20:05:06,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:06,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223608344] [2021-06-12 20:05:06,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:06,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:06,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:06,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:06,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223608344] [2021-06-12 20:05:06,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223608344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:06,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023204732] [2021-06-12 20:05:06,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 765 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 765 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:06,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:06,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:06,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:06,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:06,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:06,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:06,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:06,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:06,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:06,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:05:06,932 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:05:07,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:07,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:07,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:07,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:07,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:07,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:07,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:07,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:07,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:07,039 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:28, output treesize:7 [2021-06-12 20:05:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:07,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023204732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:07,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:07,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:07,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971750288] [2021-06-12 20:05:07,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:07,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:07,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:07,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:07,070 INFO L87 Difference]: Start difference. First operand 476 states and 1485 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:07,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:07,363 INFO L93 Difference]: Finished difference Result 646 states and 1979 transitions. [2021-06-12 20:05:07,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:05:07,363 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:07,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:07,364 INFO L225 Difference]: With dead ends: 646 [2021-06-12 20:05:07,364 INFO L226 Difference]: Without dead ends: 625 [2021-06-12 20:05:07,364 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 231.2ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:05:07,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-06-12 20:05:07,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 477. [2021-06-12 20:05:07,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.134453781512605) internal successors, (1492), 476 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:07,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1492 transitions. [2021-06-12 20:05:07,369 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1492 transitions. Word has length 21 [2021-06-12 20:05:07,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:07,369 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1492 transitions. [2021-06-12 20:05:07,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:07,369 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1492 transitions. [2021-06-12 20:05:07,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:07,370 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:07,370 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:07,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 765 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4286 [2021-06-12 20:05:07,570 INFO L430 AbstractCegarLoop]: === Iteration 777 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:07,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:07,571 INFO L82 PathProgramCache]: Analyzing trace with hash -713698499, now seen corresponding path program 765 times [2021-06-12 20:05:07,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:07,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463496458] [2021-06-12 20:05:07,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:07,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:07,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:07,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463496458] [2021-06-12 20:05:07,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463496458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:07,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150021645] [2021-06-12 20:05:07,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 766 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 766 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:07,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:05:07,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:07,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:07,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:07,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:07,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:07,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:07,745 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:07,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:07,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:05:07,761 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:05:07,802 INFO L446 ElimStorePlain]: Different costs {0=[o_0, o_2], 1=[v_prenex_217, v_prenex_218]} [2021-06-12 20:05:07,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:07,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:07,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:07,818 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:05:07,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:07,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:07,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:07,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:07,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:07,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:05:07,834 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:07,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:07,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:07,845 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:51, output treesize:21 [2021-06-12 20:05:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:07,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150021645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:07,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:07,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:05:07,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181483483] [2021-06-12 20:05:07,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:07,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:07,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:07,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:07,880 INFO L87 Difference]: Start difference. First operand 477 states and 1492 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:08,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:08,065 INFO L93 Difference]: Finished difference Result 605 states and 1869 transitions. [2021-06-12 20:05:08,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:08,066 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:08,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:08,066 INFO L225 Difference]: With dead ends: 605 [2021-06-12 20:05:08,067 INFO L226 Difference]: Without dead ends: 576 [2021-06-12 20:05:08,067 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 142.7ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:08,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-12 20:05:08,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 477. [2021-06-12 20:05:08,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.134453781512605) internal successors, (1492), 476 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:08,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1492 transitions. [2021-06-12 20:05:08,072 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1492 transitions. Word has length 21 [2021-06-12 20:05:08,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:08,072 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1492 transitions. [2021-06-12 20:05:08,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:08,072 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1492 transitions. [2021-06-12 20:05:08,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:08,073 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:08,073 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:08,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 766 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4296 [2021-06-12 20:05:08,273 INFO L430 AbstractCegarLoop]: === Iteration 778 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:08,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:08,273 INFO L82 PathProgramCache]: Analyzing trace with hash -416432089, now seen corresponding path program 766 times [2021-06-12 20:05:08,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:08,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182246936] [2021-06-12 20:05:08,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:08,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:08,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182246936] [2021-06-12 20:05:08,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182246936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:08,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972576930] [2021-06-12 20:05:08,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 767 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 767 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:08,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:08,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:08,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:08,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:08,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:08,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:08,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:08,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:08,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 20:05:08,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:08,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:08,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:08,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:08,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:05:08,493 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:08,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:08,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:08,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:08,511 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:08,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:08,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:08,527 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:65, output treesize:19 [2021-06-12 20:05:08,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:08,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972576930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:08,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:08,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:08,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658645503] [2021-06-12 20:05:08,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:08,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:08,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:08,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:08,598 INFO L87 Difference]: Start difference. First operand 477 states and 1492 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:08,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:08,780 INFO L93 Difference]: Finished difference Result 628 states and 1935 transitions. [2021-06-12 20:05:08,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:05:08,780 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:08,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:08,781 INFO L225 Difference]: With dead ends: 628 [2021-06-12 20:05:08,781 INFO L226 Difference]: Without dead ends: 605 [2021-06-12 20:05:08,781 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 206.9ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:05:08,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-06-12 20:05:08,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 476. [2021-06-12 20:05:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.143157894736842) internal successors, (1493), 475 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:08,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1493 transitions. [2021-06-12 20:05:08,786 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1493 transitions. Word has length 21 [2021-06-12 20:05:08,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:08,786 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1493 transitions. [2021-06-12 20:05:08,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:08,786 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1493 transitions. [2021-06-12 20:05:08,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:08,787 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:08,787 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:08,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4303,767 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:08,987 INFO L430 AbstractCegarLoop]: === Iteration 779 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:08,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:08,987 INFO L82 PathProgramCache]: Analyzing trace with hash -700694773, now seen corresponding path program 767 times [2021-06-12 20:05:08,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:08,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532733068] [2021-06-12 20:05:08,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:09,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:09,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:09,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532733068] [2021-06-12 20:05:09,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532733068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:09,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418187899] [2021-06-12 20:05:09,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 768 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 768 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:09,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:05:09,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:09,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:09,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:09,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:09,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:09,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:09,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:09,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:09,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:05:09,189 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:05:09,227 INFO L446 ElimStorePlain]: Different costs {0=[o_0, o_2], 1=[v_prenex_219, v_prenex_220]} [2021-06-12 20:05:09,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:09,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:09,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:09,243 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:05:09,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:09,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:09,245 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:09,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:09,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:09,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:09,259 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:09,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:09,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:09,270 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:51, output treesize:19 [2021-06-12 20:05:09,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:09,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418187899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:09,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:09,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:09,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800125668] [2021-06-12 20:05:09,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:09,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:09,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:09,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:09,347 INFO L87 Difference]: Start difference. First operand 476 states and 1493 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:09,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:09,546 INFO L93 Difference]: Finished difference Result 710 states and 2164 transitions. [2021-06-12 20:05:09,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:05:09,546 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:09,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:09,547 INFO L225 Difference]: With dead ends: 710 [2021-06-12 20:05:09,547 INFO L226 Difference]: Without dead ends: 683 [2021-06-12 20:05:09,547 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 228.6ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:05:09,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-06-12 20:05:09,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 479. [2021-06-12 20:05:09,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.1527196652719667) internal successors, (1507), 478 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:09,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1507 transitions. [2021-06-12 20:05:09,552 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1507 transitions. Word has length 21 [2021-06-12 20:05:09,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:09,552 INFO L482 AbstractCegarLoop]: Abstraction has 479 states and 1507 transitions. [2021-06-12 20:05:09,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:09,552 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1507 transitions. [2021-06-12 20:05:09,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:09,553 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:09,553 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:09,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 768 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4310 [2021-06-12 20:05:09,753 INFO L430 AbstractCegarLoop]: === Iteration 780 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:09,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:09,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1374995017, now seen corresponding path program 768 times [2021-06-12 20:05:09,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:09,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145500582] [2021-06-12 20:05:09,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:09,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:09,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:09,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145500582] [2021-06-12 20:05:09,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145500582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:09,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466188824] [2021-06-12 20:05:09,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 769 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 769 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:09,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:05:09,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:09,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:09,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:09,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:09,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:09,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:09,922 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:09,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:09,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:05:09,938 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:05:09,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:09,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:09,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:09,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:10,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:10,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:10,001 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:10,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:10,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:10,007 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:10 [2021-06-12 20:05:10,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:10,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466188824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:10,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:10,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:05:10,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862668679] [2021-06-12 20:05:10,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:10,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:10,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:10,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:10,022 INFO L87 Difference]: Start difference. First operand 479 states and 1507 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:10,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:10,183 INFO L93 Difference]: Finished difference Result 582 states and 1790 transitions. [2021-06-12 20:05:10,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:10,184 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:10,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:10,184 INFO L225 Difference]: With dead ends: 582 [2021-06-12 20:05:10,184 INFO L226 Difference]: Without dead ends: 561 [2021-06-12 20:05:10,184 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 148.1ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:10,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-06-12 20:05:10,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 475. [2021-06-12 20:05:10,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.1434599156118144) internal successors, (1490), 474 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:10,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1490 transitions. [2021-06-12 20:05:10,190 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1490 transitions. Word has length 21 [2021-06-12 20:05:10,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:10,190 INFO L482 AbstractCegarLoop]: Abstraction has 475 states and 1490 transitions. [2021-06-12 20:05:10,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:10,190 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1490 transitions. [2021-06-12 20:05:10,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:10,190 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:10,190 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:10,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4322,769 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:10,391 INFO L430 AbstractCegarLoop]: === Iteration 781 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:10,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:10,391 INFO L82 PathProgramCache]: Analyzing trace with hash 983546445, now seen corresponding path program 769 times [2021-06-12 20:05:10,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:10,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713177426] [2021-06-12 20:05:10,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:10,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:10,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:10,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713177426] [2021-06-12 20:05:10,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713177426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:10,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516836942] [2021-06-12 20:05:10,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 770 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 770 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:10,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:10,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:10,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:10,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:10,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:10,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:10,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:10,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:33 [2021-06-12 20:05:10,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:05:10,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:10,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:10,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:05:10,612 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:10,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:10,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:10,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:05:10,632 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:10,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:10,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:10,650 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:67, output treesize:24 [2021-06-12 20:05:10,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:10,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516836942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:10,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:10,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:05:10,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814457302] [2021-06-12 20:05:10,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:10,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:10,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:10,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:10,684 INFO L87 Difference]: Start difference. First operand 475 states and 1490 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:10,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:10,862 INFO L93 Difference]: Finished difference Result 579 states and 1790 transitions. [2021-06-12 20:05:10,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:10,862 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:10,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:10,863 INFO L225 Difference]: With dead ends: 579 [2021-06-12 20:05:10,863 INFO L226 Difference]: Without dead ends: 543 [2021-06-12 20:05:10,863 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 137.9ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:10,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-12 20:05:10,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 476. [2021-06-12 20:05:10,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.1473684210526316) internal successors, (1495), 475 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:10,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1495 transitions. [2021-06-12 20:05:10,868 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1495 transitions. Word has length 21 [2021-06-12 20:05:10,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:10,868 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1495 transitions. [2021-06-12 20:05:10,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:10,868 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1495 transitions. [2021-06-12 20:05:10,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:10,869 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:10,869 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:11,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4326,770 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:11,069 INFO L430 AbstractCegarLoop]: === Iteration 782 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:11,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:11,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1280812855, now seen corresponding path program 770 times [2021-06-12 20:05:11,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:11,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279760609] [2021-06-12 20:05:11,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:11,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:11,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279760609] [2021-06-12 20:05:11,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279760609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:11,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375601496] [2021-06-12 20:05:11,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 771 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 771 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:11,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:11,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:11,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:11,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:11,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:11,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:11,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:11,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:11,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:11,258 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:11,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:11,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:05:11,275 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:42 [2021-06-12 20:05:11,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:11,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:11,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:11,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:11,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:11,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:11,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:11,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:11,350 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:11,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:11,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:11,365 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:70, output treesize:19 [2021-06-12 20:05:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:11,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375601496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:11,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:11,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:11,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931553917] [2021-06-12 20:05:11,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:11,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:11,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:11,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:11,439 INFO L87 Difference]: Start difference. First operand 476 states and 1495 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:11,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:11,718 INFO L93 Difference]: Finished difference Result 675 states and 2076 transitions. [2021-06-12 20:05:11,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:05:11,719 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:11,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:11,720 INFO L225 Difference]: With dead ends: 675 [2021-06-12 20:05:11,720 INFO L226 Difference]: Without dead ends: 652 [2021-06-12 20:05:11,720 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 250.1ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:05:11,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-12 20:05:11,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 491. [2021-06-12 20:05:11,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.163265306122449) internal successors, (1550), 490 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:11,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1550 transitions. [2021-06-12 20:05:11,725 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1550 transitions. Word has length 21 [2021-06-12 20:05:11,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:11,725 INFO L482 AbstractCegarLoop]: Abstraction has 491 states and 1550 transitions. [2021-06-12 20:05:11,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:11,725 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1550 transitions. [2021-06-12 20:05:11,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:11,726 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:11,726 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:11,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 771 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4332 [2021-06-12 20:05:11,926 INFO L430 AbstractCegarLoop]: === Iteration 783 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:11,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:11,926 INFO L82 PathProgramCache]: Analyzing trace with hash 996550171, now seen corresponding path program 771 times [2021-06-12 20:05:11,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:11,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491592407] [2021-06-12 20:05:11,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:11,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:12,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:12,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:12,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491592407] [2021-06-12 20:05:12,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491592407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:12,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671422296] [2021-06-12 20:05:12,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 772 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 772 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:12,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:05:12,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:12,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:12,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:12,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:12,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:12,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:12,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:12,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:12,108 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:12,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:12,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:12,120 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:47, output treesize:31 [2021-06-12 20:05:12,150 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-12 20:05:12,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:12,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:12,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:12,155 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:12,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:12,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:12,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:12,181 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:12,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:12,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:12,196 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:59, output treesize:19 [2021-06-12 20:05:12,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:12,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671422296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:12,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:12,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:12,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332320477] [2021-06-12 20:05:12,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:12,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:12,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:12,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:12,272 INFO L87 Difference]: Start difference. First operand 491 states and 1550 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:12,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:12,493 INFO L93 Difference]: Finished difference Result 711 states and 2192 transitions. [2021-06-12 20:05:12,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:05:12,494 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:12,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:12,495 INFO L225 Difference]: With dead ends: 711 [2021-06-12 20:05:12,495 INFO L226 Difference]: Without dead ends: 684 [2021-06-12 20:05:12,495 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 223.3ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:05:12,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-06-12 20:05:12,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 497. [2021-06-12 20:05:12,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.161290322580645) internal successors, (1568), 496 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:12,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1568 transitions. [2021-06-12 20:05:12,500 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1568 transitions. Word has length 21 [2021-06-12 20:05:12,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:12,501 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1568 transitions. [2021-06-12 20:05:12,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:12,501 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1568 transitions. [2021-06-12 20:05:12,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:12,501 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:12,501 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:12,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 772 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4341 [2021-06-12 20:05:12,702 INFO L430 AbstractCegarLoop]: === Iteration 784 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:12,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:12,702 INFO L82 PathProgramCache]: Analyzing trace with hash -964196795, now seen corresponding path program 772 times [2021-06-12 20:05:12,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:12,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145947158] [2021-06-12 20:05:12,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:12,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:12,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145947158] [2021-06-12 20:05:12,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145947158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:12,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140841951] [2021-06-12 20:05:12,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 773 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 773 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:12,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:12,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:12,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:12,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:12,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:12,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:12,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:12,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:12,882 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:12,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:12,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:05:12,899 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:42 [2021-06-12 20:05:12,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:12,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:12,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:12,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:12,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:12,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:12,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:12,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:12,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:12,979 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:10 [2021-06-12 20:05:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:13,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140841951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:13,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:13,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:05:13,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683467526] [2021-06-12 20:05:13,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:13,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:13,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:13,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:13,006 INFO L87 Difference]: Start difference. First operand 497 states and 1568 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:13,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:13,175 INFO L93 Difference]: Finished difference Result 585 states and 1808 transitions. [2021-06-12 20:05:13,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:13,175 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:13,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:13,176 INFO L225 Difference]: With dead ends: 585 [2021-06-12 20:05:13,176 INFO L226 Difference]: Without dead ends: 566 [2021-06-12 20:05:13,176 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 153.7ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:13,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-12 20:05:13,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 481. [2021-06-12 20:05:13,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.154166666666667) internal successors, (1514), 480 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:13,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1514 transitions. [2021-06-12 20:05:13,181 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1514 transitions. Word has length 21 [2021-06-12 20:05:13,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:13,181 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1514 transitions. [2021-06-12 20:05:13,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:13,181 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1514 transitions. [2021-06-12 20:05:13,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:13,182 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:13,182 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:13,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 773 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4352 [2021-06-12 20:05:13,382 INFO L430 AbstractCegarLoop]: === Iteration 785 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:13,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:13,383 INFO L82 PathProgramCache]: Analyzing trace with hash -418824141, now seen corresponding path program 773 times [2021-06-12 20:05:13,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:13,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452760565] [2021-06-12 20:05:13,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:13,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:13,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:13,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452760565] [2021-06-12 20:05:13,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452760565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:13,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798432753] [2021-06-12 20:05:13,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 774 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 774 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:13,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:05:13,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:13,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:13,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:13,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:13,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:13,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:13,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:13,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:13,551 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:13,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:13,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:13,562 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:47, output treesize:31 [2021-06-12 20:05:13,627 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-12 20:05:13,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:13,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:13,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:13,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:13,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:13,637 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:13,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:13,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:13,642 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:7 [2021-06-12 20:05:13,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:13,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798432753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:13,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:13,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:05:13,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680173960] [2021-06-12 20:05:13,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:05:13,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:13,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:05:13,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:05:13,652 INFO L87 Difference]: Start difference. First operand 481 states and 1514 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:13,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:13,812 INFO L93 Difference]: Finished difference Result 594 states and 1827 transitions. [2021-06-12 20:05:13,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:13,812 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:13,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:13,813 INFO L225 Difference]: With dead ends: 594 [2021-06-12 20:05:13,813 INFO L226 Difference]: Without dead ends: 573 [2021-06-12 20:05:13,813 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 179.2ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:05:13,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-06-12 20:05:13,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 481. [2021-06-12 20:05:13,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.1625) internal successors, (1518), 480 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:13,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1518 transitions. [2021-06-12 20:05:13,818 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1518 transitions. Word has length 21 [2021-06-12 20:05:13,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:13,818 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1518 transitions. [2021-06-12 20:05:13,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:13,818 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1518 transitions. [2021-06-12 20:05:13,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:13,819 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:13,819 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:14,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4356,774 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:14,019 INFO L430 AbstractCegarLoop]: === Iteration 786 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:14,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:14,019 INFO L82 PathProgramCache]: Analyzing trace with hash -2137808823, now seen corresponding path program 774 times [2021-06-12 20:05:14,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:14,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711832898] [2021-06-12 20:05:14,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:14,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:14,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:14,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:14,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711832898] [2021-06-12 20:05:14,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711832898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:14,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438555254] [2021-06-12 20:05:14,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 775 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 775 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:14,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:05:14,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:14,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:14,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:14,207 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[v_prenex_221]} [2021-06-12 20:05:14,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:14,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:14,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:14,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:14,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:14,227 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:14,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:14,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:05:14,241 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:36 [2021-06-12 20:05:14,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:14,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:14,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:14,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:14,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:14,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:14,307 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:14,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:14,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:14,314 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:10 [2021-06-12 20:05:14,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:14,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438555254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:14,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:14,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:05:14,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541316383] [2021-06-12 20:05:14,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:14,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:14,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:14,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:14,330 INFO L87 Difference]: Start difference. First operand 481 states and 1518 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:14,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:14,499 INFO L93 Difference]: Finished difference Result 594 states and 1827 transitions. [2021-06-12 20:05:14,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:14,499 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:14,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:14,500 INFO L225 Difference]: With dead ends: 594 [2021-06-12 20:05:14,500 INFO L226 Difference]: Without dead ends: 573 [2021-06-12 20:05:14,500 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 162.1ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:14,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-06-12 20:05:14,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 477. [2021-06-12 20:05:14,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.153361344537815) internal successors, (1501), 476 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:14,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1501 transitions. [2021-06-12 20:05:14,505 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1501 transitions. Word has length 21 [2021-06-12 20:05:14,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:14,505 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1501 transitions. [2021-06-12 20:05:14,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:14,505 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1501 transitions. [2021-06-12 20:05:14,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:14,506 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:14,506 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:14,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 775 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4362 [2021-06-12 20:05:14,706 INFO L430 AbstractCegarLoop]: === Iteration 787 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:14,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:14,706 INFO L82 PathProgramCache]: Analyzing trace with hash -741421645, now seen corresponding path program 775 times [2021-06-12 20:05:14,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:14,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203440061] [2021-06-12 20:05:14,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:14,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:14,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203440061] [2021-06-12 20:05:14,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203440061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:14,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354454228] [2021-06-12 20:05:14,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 776 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 776 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:14,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:14,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:14,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:14,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:14,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:14,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:14,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:14,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-06-12 20:05:14,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:14,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:14,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:14,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:14,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:14,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:14,961 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:14,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:14,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:14,966 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:28, output treesize:7 [2021-06-12 20:05:14,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:14,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354454228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:14,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:14,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:14,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670709567] [2021-06-12 20:05:14,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:14,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:14,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:14,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:14,995 INFO L87 Difference]: Start difference. First operand 477 states and 1501 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:15,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:15,138 INFO L93 Difference]: Finished difference Result 662 states and 2041 transitions. [2021-06-12 20:05:15,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:05:15,139 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:15,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:15,139 INFO L225 Difference]: With dead ends: 662 [2021-06-12 20:05:15,139 INFO L226 Difference]: Without dead ends: 641 [2021-06-12 20:05:15,139 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 200.1ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:05:15,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-06-12 20:05:15,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 479. [2021-06-12 20:05:15,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.1506276150627617) internal successors, (1506), 478 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:15,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1506 transitions. [2021-06-12 20:05:15,145 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1506 transitions. Word has length 21 [2021-06-12 20:05:15,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:15,145 INFO L482 AbstractCegarLoop]: Abstraction has 479 states and 1506 transitions. [2021-06-12 20:05:15,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:15,145 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1506 transitions. [2021-06-12 20:05:15,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:15,145 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:15,145 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:15,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4367,776 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:15,346 INFO L430 AbstractCegarLoop]: === Iteration 788 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:15,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:15,346 INFO L82 PathProgramCache]: Analyzing trace with hash -2071349807, now seen corresponding path program 776 times [2021-06-12 20:05:15,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:15,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109474073] [2021-06-12 20:05:15,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:15,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:15,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:15,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109474073] [2021-06-12 20:05:15,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109474073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:15,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119960036] [2021-06-12 20:05:15,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 777 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 777 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:15,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:15,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:15,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:15,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:15,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:15,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:15,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:15,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:15,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-06-12 20:05:15,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:15,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:15,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:15,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:15,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:15,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:15,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:15,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:15,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:15,565 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:10 [2021-06-12 20:05:15,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:15,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119960036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:15,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:15,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:05:15,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434746237] [2021-06-12 20:05:15,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:15,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:15,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:15,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:15,580 INFO L87 Difference]: Start difference. First operand 479 states and 1506 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:15,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:15,735 INFO L93 Difference]: Finished difference Result 575 states and 1776 transitions. [2021-06-12 20:05:15,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:15,735 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:15,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:15,736 INFO L225 Difference]: With dead ends: 575 [2021-06-12 20:05:15,736 INFO L226 Difference]: Without dead ends: 554 [2021-06-12 20:05:15,736 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 136.1ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:15,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-12 20:05:15,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 476. [2021-06-12 20:05:15,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.1452631578947368) internal successors, (1494), 475 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:15,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1494 transitions. [2021-06-12 20:05:15,740 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1494 transitions. Word has length 21 [2021-06-12 20:05:15,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:15,741 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1494 transitions. [2021-06-12 20:05:15,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:15,741 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1494 transitions. [2021-06-12 20:05:15,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:15,741 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:15,741 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:15,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 777 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4373 [2021-06-12 20:05:15,942 INFO L430 AbstractCegarLoop]: === Iteration 789 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:15,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:15,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1308536001, now seen corresponding path program 777 times [2021-06-12 20:05:15,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:15,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810265894] [2021-06-12 20:05:15,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:16,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:16,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:16,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810265894] [2021-06-12 20:05:16,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810265894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:16,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890709454] [2021-06-12 20:05:16,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 778 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 778 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:16,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:05:16,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:16,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:16,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:16,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:16,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:16,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:16,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:16,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:16,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-06-12 20:05:16,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:16,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:16,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:16,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:16,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:16,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:16,195 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:16,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:16,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:16,202 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:10 [2021-06-12 20:05:16,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:16,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890709454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:16,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:16,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:16,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038994841] [2021-06-12 20:05:16,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:16,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:16,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:16,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:16,248 INFO L87 Difference]: Start difference. First operand 476 states and 1494 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:16,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:16,418 INFO L93 Difference]: Finished difference Result 654 states and 2005 transitions. [2021-06-12 20:05:16,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:05:16,418 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:16,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:16,419 INFO L225 Difference]: With dead ends: 654 [2021-06-12 20:05:16,419 INFO L226 Difference]: Without dead ends: 633 [2021-06-12 20:05:16,419 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 206.8ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:05:16,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-12 20:05:16,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 455. [2021-06-12 20:05:16,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.1277533039647576) internal successors, (1420), 454 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:16,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1420 transitions. [2021-06-12 20:05:16,424 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1420 transitions. Word has length 21 [2021-06-12 20:05:16,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:16,424 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1420 transitions. [2021-06-12 20:05:16,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:16,425 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1420 transitions. [2021-06-12 20:05:16,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:16,425 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:16,425 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:16,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4375,778 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:16,626 INFO L430 AbstractCegarLoop]: === Iteration 790 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:16,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:16,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1158811613, now seen corresponding path program 778 times [2021-06-12 20:05:16,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:16,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194384928] [2021-06-12 20:05:16,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:16,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:16,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:16,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:16,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194384928] [2021-06-12 20:05:16,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194384928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:16,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963533645] [2021-06-12 20:05:16,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 779 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 779 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:16,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:16,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:16,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:16,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:16,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:16,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:16,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:16,736 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:16,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:16,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:16,743 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:05:16,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:16,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:16,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:16,769 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:05:16,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:16,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:05:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:16,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963533645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:16,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:16,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:05:16,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649576022] [2021-06-12 20:05:16,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:05:16,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:16,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:05:16,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:05:16,783 INFO L87 Difference]: Start difference. First operand 455 states and 1420 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:16,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:16,906 INFO L93 Difference]: Finished difference Result 758 states and 2309 transitions. [2021-06-12 20:05:16,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:16,906 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:16,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:16,907 INFO L225 Difference]: With dead ends: 758 [2021-06-12 20:05:16,907 INFO L226 Difference]: Without dead ends: 736 [2021-06-12 20:05:16,908 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:05:16,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-06-12 20:05:16,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 461. [2021-06-12 20:05:16,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.132608695652174) internal successors, (1441), 460 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:16,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1441 transitions. [2021-06-12 20:05:16,913 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1441 transitions. Word has length 21 [2021-06-12 20:05:16,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:16,913 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1441 transitions. [2021-06-12 20:05:16,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:16,913 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1441 transitions. [2021-06-12 20:05:16,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:16,914 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:16,914 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:17,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4378,779 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:17,114 INFO L430 AbstractCegarLoop]: === Iteration 791 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:17,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:17,114 INFO L82 PathProgramCache]: Analyzing trace with hash -879667217, now seen corresponding path program 779 times [2021-06-12 20:05:17,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:17,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537282503] [2021-06-12 20:05:17,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:17,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:17,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:17,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537282503] [2021-06-12 20:05:17,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537282503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:17,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366049336] [2021-06-12 20:05:17,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 780 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 780 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:17,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:05:17,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:17,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:05:17,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:17,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:17,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:17,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:17,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:17,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:17,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:17,251 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:47 [2021-06-12 20:05:17,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-12 20:05:17,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:17,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:05:17,338 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:17,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 20:05:17,341 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:17,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:17,343 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:17,367 INFO L628 ElimStorePlain]: treesize reduction 8, result has 76.5 percent of original size [2021-06-12 20:05:17,367 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:05:17,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:05:17,368 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:101, output treesize:26 [2021-06-12 20:05:17,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:17,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366049336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:17,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:17,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:05:17,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567459906] [2021-06-12 20:05:17,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:05:17,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:17,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:05:17,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:05:17,442 INFO L87 Difference]: Start difference. First operand 461 states and 1441 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:18,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:18,150 INFO L93 Difference]: Finished difference Result 822 states and 2513 transitions. [2021-06-12 20:05:18,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:05:18,151 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:18,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:18,152 INFO L225 Difference]: With dead ends: 822 [2021-06-12 20:05:18,152 INFO L226 Difference]: Without dead ends: 768 [2021-06-12 20:05:18,152 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 608.4ms TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:05:18,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-06-12 20:05:18,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 462. [2021-06-12 20:05:18,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.1323210412147504) internal successors, (1444), 461 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:18,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1444 transitions. [2021-06-12 20:05:18,158 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1444 transitions. Word has length 21 [2021-06-12 20:05:18,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:18,158 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1444 transitions. [2021-06-12 20:05:18,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:18,158 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1444 transitions. [2021-06-12 20:05:18,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:18,158 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:18,158 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:18,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 780 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4381 [2021-06-12 20:05:18,359 INFO L430 AbstractCegarLoop]: === Iteration 792 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:18,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:18,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1163929901, now seen corresponding path program 780 times [2021-06-12 20:05:18,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:18,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020667144] [2021-06-12 20:05:18,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:18,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:18,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020667144] [2021-06-12 20:05:18,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020667144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:18,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692196302] [2021-06-12 20:05:18,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 781 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 781 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:18,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:05:18,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:18,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:18,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:18,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:18,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:18,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:18,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:18,515 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:18,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:18,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:05:18,528 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:29 [2021-06-12 20:05:18,614 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_222, v_prenex_223], 1=[o_0]} [2021-06-12 20:05:18,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:18,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:18,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:18,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:18,630 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:18,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:18,639 INFO L518 ElimStorePlain]: Eliminatee v_prenex_223 vanished before elimination [2021-06-12 20:05:18,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:18,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:18,642 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:18,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:18,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:18,651 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:45, output treesize:13 [2021-06-12 20:05:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:18,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692196302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:18,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:18,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:18,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778799836] [2021-06-12 20:05:18,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:18,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:18,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:18,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:18,701 INFO L87 Difference]: Start difference. First operand 462 states and 1444 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:19,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:19,149 INFO L93 Difference]: Finished difference Result 954 states and 2915 transitions. [2021-06-12 20:05:19,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:05:19,149 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:19,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:19,150 INFO L225 Difference]: With dead ends: 954 [2021-06-12 20:05:19,151 INFO L226 Difference]: Without dead ends: 927 [2021-06-12 20:05:19,151 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 389.7ms TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:05:19,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-06-12 20:05:19,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 486. [2021-06-12 20:05:19,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.154639175257732) internal successors, (1530), 485 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:19,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1530 transitions. [2021-06-12 20:05:19,157 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1530 transitions. Word has length 21 [2021-06-12 20:05:19,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:19,157 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1530 transitions. [2021-06-12 20:05:19,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:19,157 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1530 transitions. [2021-06-12 20:05:19,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:19,157 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:19,157 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:19,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 781 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4392 [2021-06-12 20:05:19,358 INFO L430 AbstractCegarLoop]: === Iteration 793 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:19,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:19,358 INFO L82 PathProgramCache]: Analyzing trace with hash 522461939, now seen corresponding path program 781 times [2021-06-12 20:05:19,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:19,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786586071] [2021-06-12 20:05:19,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:19,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:19,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:19,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:19,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786586071] [2021-06-12 20:05:19,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786586071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:19,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483676166] [2021-06-12 20:05:19,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 782 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 782 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:19,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:19,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:19,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:19,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:19,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:19,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:19,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:19,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:19,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:05:19,518 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:29 [2021-06-12 20:05:19,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:19,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:19,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:19,590 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:05:19,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:19,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:05:19,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:19,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483676166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:19,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:19,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:05:19,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98107601] [2021-06-12 20:05:19,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:05:19,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:19,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:05:19,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:05:19,620 INFO L87 Difference]: Start difference. First operand 486 states and 1530 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:19,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:19,901 INFO L93 Difference]: Finished difference Result 872 states and 2685 transitions. [2021-06-12 20:05:19,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:05:19,901 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:19,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:19,902 INFO L225 Difference]: With dead ends: 872 [2021-06-12 20:05:19,902 INFO L226 Difference]: Without dead ends: 851 [2021-06-12 20:05:19,902 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 231.3ms TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:05:19,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2021-06-12 20:05:19,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 484. [2021-06-12 20:05:19,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.1573498964803313) internal successors, (1525), 483 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:19,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1525 transitions. [2021-06-12 20:05:19,908 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1525 transitions. Word has length 21 [2021-06-12 20:05:19,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:19,909 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1525 transitions. [2021-06-12 20:05:19,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:19,909 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1525 transitions. [2021-06-12 20:05:19,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:19,909 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:19,909 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:20,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4404,782 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:20,110 INFO L430 AbstractCegarLoop]: === Iteration 794 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:20,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:20,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1562697737, now seen corresponding path program 782 times [2021-06-12 20:05:20,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:20,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663121036] [2021-06-12 20:05:20,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:20,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:20,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:20,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663121036] [2021-06-12 20:05:20,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663121036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:20,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084911996] [2021-06-12 20:05:20,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 783 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 783 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:20,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:20,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:20,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:20,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:20,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:20,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:20,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:20,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:20,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:20,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:20,273 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:05:20,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:20,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:20,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:20,349 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:05:20,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:20,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:05:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:20,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084911996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:20,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:20,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:05:20,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072391905] [2021-06-12 20:05:20,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:05:20,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:20,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:05:20,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:05:20,387 INFO L87 Difference]: Start difference. First operand 484 states and 1525 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:20,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:20,962 INFO L93 Difference]: Finished difference Result 1026 states and 3143 transitions. [2021-06-12 20:05:20,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:05:20,963 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:20,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:20,964 INFO L225 Difference]: With dead ends: 1026 [2021-06-12 20:05:20,964 INFO L226 Difference]: Without dead ends: 1005 [2021-06-12 20:05:20,964 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 414.1ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:05:20,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-06-12 20:05:20,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 482. [2021-06-12 20:05:20,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.1600831600831603) internal successors, (1520), 481 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:20,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1520 transitions. [2021-06-12 20:05:20,971 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1520 transitions. Word has length 21 [2021-06-12 20:05:20,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:20,971 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1520 transitions. [2021-06-12 20:05:20,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:20,971 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1520 transitions. [2021-06-12 20:05:20,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:20,972 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:20,972 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:21,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 783 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4411 [2021-06-12 20:05:21,172 INFO L430 AbstractCegarLoop]: === Iteration 795 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:21,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:21,172 INFO L82 PathProgramCache]: Analyzing trace with hash 968940535, now seen corresponding path program 783 times [2021-06-12 20:05:21,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:21,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703423339] [2021-06-12 20:05:21,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:21,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:21,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:21,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:21,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703423339] [2021-06-12 20:05:21,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703423339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:21,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608229590] [2021-06-12 20:05:21,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 784 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 784 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:21,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:05:21,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:21,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:21,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:21,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:21,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:21,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:21,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:21,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:21,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:21,311 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:05:21,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:21,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:21,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:21,350 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:05:21,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:21,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:05:21,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:21,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608229590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:21,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:21,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:05:21,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068668559] [2021-06-12 20:05:21,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:05:21,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:21,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:05:21,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:05:21,364 INFO L87 Difference]: Start difference. First operand 482 states and 1520 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:21,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:21,479 INFO L93 Difference]: Finished difference Result 758 states and 2345 transitions. [2021-06-12 20:05:21,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:21,479 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:21,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:21,480 INFO L225 Difference]: With dead ends: 758 [2021-06-12 20:05:21,480 INFO L226 Difference]: Without dead ends: 736 [2021-06-12 20:05:21,480 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:21,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-06-12 20:05:21,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 484. [2021-06-12 20:05:21,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.1573498964803313) internal successors, (1525), 483 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:21,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1525 transitions. [2021-06-12 20:05:21,486 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1525 transitions. Word has length 21 [2021-06-12 20:05:21,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:21,486 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1525 transitions. [2021-06-12 20:05:21,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:21,486 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1525 transitions. [2021-06-12 20:05:21,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:21,487 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:21,487 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:21,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4417,784 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:21,687 INFO L430 AbstractCegarLoop]: === Iteration 796 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:21,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:21,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1276069115, now seen corresponding path program 784 times [2021-06-12 20:05:21,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:21,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818525057] [2021-06-12 20:05:21,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:21,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:21,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:21,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818525057] [2021-06-12 20:05:21,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818525057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:21,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597795364] [2021-06-12 20:05:21,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 785 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 785 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:21,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:21,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:21,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:21,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:21,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:21,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:21,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:21,813 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:21,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:21,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:21,820 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:05:21,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:21,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:21,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:21,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:21,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:21,853 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:05:21,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:21,854 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-06-12 20:05:21,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:21,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597795364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:21,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:21,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:05:21,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273148434] [2021-06-12 20:05:21,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:05:21,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:21,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:05:21,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:05:21,876 INFO L87 Difference]: Start difference. First operand 484 states and 1525 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:22,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:22,021 INFO L93 Difference]: Finished difference Result 769 states and 2372 transitions. [2021-06-12 20:05:22,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:22,022 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:22,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:22,023 INFO L225 Difference]: With dead ends: 769 [2021-06-12 20:05:22,023 INFO L226 Difference]: Without dead ends: 740 [2021-06-12 20:05:22,023 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:22,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-06-12 20:05:22,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 477. [2021-06-12 20:05:22,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.149159663865546) internal successors, (1499), 476 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:22,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1499 transitions. [2021-06-12 20:05:22,029 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1499 transitions. Word has length 21 [2021-06-12 20:05:22,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:22,029 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1499 transitions. [2021-06-12 20:05:22,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:22,029 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1499 transitions. [2021-06-12 20:05:22,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:22,029 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:22,030 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:22,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 785 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4420 [2021-06-12 20:05:22,230 INFO L430 AbstractCegarLoop]: === Iteration 797 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:22,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:22,230 INFO L82 PathProgramCache]: Analyzing trace with hash 30815813, now seen corresponding path program 785 times [2021-06-12 20:05:22,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:22,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507326166] [2021-06-12 20:05:22,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:22,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:22,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507326166] [2021-06-12 20:05:22,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507326166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:22,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077286039] [2021-06-12 20:05:22,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 786 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 786 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:22,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:05:22,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:22,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:22,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:22,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:22,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:22,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:22,366 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:22,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:22,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:22,376 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:05:22,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:22,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:22,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:22,416 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:05:22,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:22,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:05:22,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:22,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077286039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:22,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:22,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:05:22,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843655075] [2021-06-12 20:05:22,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:05:22,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:22,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:05:22,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:22,430 INFO L87 Difference]: Start difference. First operand 477 states and 1499 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:22,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:22,532 INFO L93 Difference]: Finished difference Result 602 states and 1865 transitions. [2021-06-12 20:05:22,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:22,532 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:22,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:22,533 INFO L225 Difference]: With dead ends: 602 [2021-06-12 20:05:22,533 INFO L226 Difference]: Without dead ends: 580 [2021-06-12 20:05:22,533 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 107.3ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:22,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-06-12 20:05:22,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 483. [2021-06-12 20:05:22,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 3.1535269709543567) internal successors, (1520), 482 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:22,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1520 transitions. [2021-06-12 20:05:22,538 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1520 transitions. Word has length 21 [2021-06-12 20:05:22,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:22,538 INFO L482 AbstractCegarLoop]: Abstraction has 483 states and 1520 transitions. [2021-06-12 20:05:22,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:22,538 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1520 transitions. [2021-06-12 20:05:22,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:22,539 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:22,539 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:22,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4424,786 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:22,739 INFO L430 AbstractCegarLoop]: === Iteration 798 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:22,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:22,739 INFO L82 PathProgramCache]: Analyzing trace with hash 656139931, now seen corresponding path program 786 times [2021-06-12 20:05:22,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:22,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424552864] [2021-06-12 20:05:22,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:22,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:22,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:22,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:22,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424552864] [2021-06-12 20:05:22,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424552864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:22,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093978506] [2021-06-12 20:05:22,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 787 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 787 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:22,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:05:22,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:22,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:22,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:22,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:22,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:22,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:22,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:22,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 20:05:22,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:05:22,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:22,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:22,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:22,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:22,927 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:05:22,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:22,927 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:05:22,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:22,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093978506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:22,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:22,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:05:22,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75588647] [2021-06-12 20:05:22,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:05:22,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:22,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:05:22,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:05:22,971 INFO L87 Difference]: Start difference. First operand 483 states and 1520 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:23,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:23,159 INFO L93 Difference]: Finished difference Result 673 states and 2083 transitions. [2021-06-12 20:05:23,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:05:23,159 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:23,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:23,160 INFO L225 Difference]: With dead ends: 673 [2021-06-12 20:05:23,160 INFO L226 Difference]: Without dead ends: 646 [2021-06-12 20:05:23,160 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:23,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-06-12 20:05:23,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 483. [2021-06-12 20:05:23,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 3.1493775933609958) internal successors, (1518), 482 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:23,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1518 transitions. [2021-06-12 20:05:23,165 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1518 transitions. Word has length 21 [2021-06-12 20:05:23,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:23,166 INFO L482 AbstractCegarLoop]: Abstraction has 483 states and 1518 transitions. [2021-06-12 20:05:23,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:23,166 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1518 transitions. [2021-06-12 20:05:23,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:23,166 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:23,166 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:23,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 787 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4427 [2021-06-12 20:05:23,367 INFO L430 AbstractCegarLoop]: === Iteration 799 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:23,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:23,367 INFO L82 PathProgramCache]: Analyzing trace with hash 371877247, now seen corresponding path program 787 times [2021-06-12 20:05:23,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:23,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624519342] [2021-06-12 20:05:23,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:23,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:23,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624519342] [2021-06-12 20:05:23,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624519342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:23,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403659721] [2021-06-12 20:05:23,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 788 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 788 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:23,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:23,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:23,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:23,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:23,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:23,522 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:23,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:23,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:23,532 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:05:23,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:23,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:23,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:23,586 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:05:23,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:23,589 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:23,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:23,595 INFO L518 ElimStorePlain]: Eliminatee v_prenex_225 vanished before elimination [2021-06-12 20:05:23,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:23,595 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:13 [2021-06-12 20:05:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:23,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403659721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:23,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:23,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:05:23,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510522204] [2021-06-12 20:05:23,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:05:23,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:23,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:05:23,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:05:23,643 INFO L87 Difference]: Start difference. First operand 483 states and 1518 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:23,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:23,859 INFO L93 Difference]: Finished difference Result 794 states and 2445 transitions. [2021-06-12 20:05:23,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:05:23,859 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:23,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:23,865 INFO L225 Difference]: With dead ends: 794 [2021-06-12 20:05:23,865 INFO L226 Difference]: Without dead ends: 767 [2021-06-12 20:05:23,865 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 196.4ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:05:23,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-06-12 20:05:23,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 489. [2021-06-12 20:05:23,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 3.153688524590164) internal successors, (1539), 488 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:23,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1539 transitions. [2021-06-12 20:05:23,871 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1539 transitions. Word has length 21 [2021-06-12 20:05:23,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:23,871 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1539 transitions. [2021-06-12 20:05:23,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:23,871 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1539 transitions. [2021-06-12 20:05:23,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:23,872 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:23,872 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:24,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 788 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4430 [2021-06-12 20:05:24,072 INFO L430 AbstractCegarLoop]: === Iteration 800 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:24,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:24,072 INFO L82 PathProgramCache]: Analyzing trace with hash 2058269087, now seen corresponding path program 788 times [2021-06-12 20:05:24,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:24,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661996635] [2021-06-12 20:05:24,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:24,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:24,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:24,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661996635] [2021-06-12 20:05:24,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661996635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:24,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490311458] [2021-06-12 20:05:24,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 789 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 789 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:24,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:24,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:24,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:24,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:24,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:24,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:24,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:24,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:24,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:24,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:05:24,261 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:05:24,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:24,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:24,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:24,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:24,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:24,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:24,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:24,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:24,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:24,361 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:28, output treesize:7 [2021-06-12 20:05:24,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:24,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490311458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:24,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:24,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:24,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536901722] [2021-06-12 20:05:24,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:24,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:24,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:24,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:24,391 INFO L87 Difference]: Start difference. First operand 489 states and 1539 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:24,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:24,704 INFO L93 Difference]: Finished difference Result 746 states and 2300 transitions. [2021-06-12 20:05:24,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:05:24,705 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:24,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:24,705 INFO L225 Difference]: With dead ends: 746 [2021-06-12 20:05:24,706 INFO L226 Difference]: Without dead ends: 725 [2021-06-12 20:05:24,706 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 243.1ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:05:24,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-06-12 20:05:24,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 488. [2021-06-12 20:05:24,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.1601642710472277) internal successors, (1539), 487 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:24,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1539 transitions. [2021-06-12 20:05:24,711 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1539 transitions. Word has length 21 [2021-06-12 20:05:24,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:24,711 INFO L482 AbstractCegarLoop]: Abstraction has 488 states and 1539 transitions. [2021-06-12 20:05:24,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:24,711 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1539 transitions. [2021-06-12 20:05:24,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:24,712 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:24,712 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:24,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 789 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4441 [2021-06-12 20:05:24,912 INFO L430 AbstractCegarLoop]: === Iteration 801 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:24,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:24,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2080773459, now seen corresponding path program 789 times [2021-06-12 20:05:24,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:24,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547917027] [2021-06-12 20:05:24,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:24,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:24,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547917027] [2021-06-12 20:05:24,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547917027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:24,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317000569] [2021-06-12 20:05:24,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 790 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 790 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:25,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:05:25,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:25,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:25,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:25,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:25,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:25,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:25,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:25,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:25,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:25,069 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:05:25,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:25,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:25,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:25,106 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:05:25,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:25,108 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:25,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:25,117 INFO L518 ElimStorePlain]: Eliminatee v_prenex_227 vanished before elimination [2021-06-12 20:05:25,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:25,117 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:21 [2021-06-12 20:05:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:25,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317000569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:25,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:25,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:05:25,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698353108] [2021-06-12 20:05:25,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:05:25,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:25,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:05:25,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:25,151 INFO L87 Difference]: Start difference. First operand 488 states and 1539 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:25,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:25,284 INFO L93 Difference]: Finished difference Result 654 states and 2031 transitions. [2021-06-12 20:05:25,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:25,284 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:25,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:25,285 INFO L225 Difference]: With dead ends: 654 [2021-06-12 20:05:25,285 INFO L226 Difference]: Without dead ends: 625 [2021-06-12 20:05:25,285 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 115.7ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:25,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-06-12 20:05:25,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 488. [2021-06-12 20:05:25,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.1601642710472277) internal successors, (1539), 487 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:25,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1539 transitions. [2021-06-12 20:05:25,290 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1539 transitions. Word has length 21 [2021-06-12 20:05:25,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:25,290 INFO L482 AbstractCegarLoop]: Abstraction has 488 states and 1539 transitions. [2021-06-12 20:05:25,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:25,290 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1539 transitions. [2021-06-12 20:05:25,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:25,291 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:25,291 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:25,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 790 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4448 [2021-06-12 20:05:25,491 INFO L430 AbstractCegarLoop]: === Iteration 802 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:25,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:25,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1916927427, now seen corresponding path program 790 times [2021-06-12 20:05:25,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:25,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230783804] [2021-06-12 20:05:25,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:25,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:25,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:25,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230783804] [2021-06-12 20:05:25,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230783804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:25,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958664947] [2021-06-12 20:05:25,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 791 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 791 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:25,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:25,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:25,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:25,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:25,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:25,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:25,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:25,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:25,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 20:05:25,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:25,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:25,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:05:25,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:25,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:25,671 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:05:25,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:25,672 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:45, output treesize:19 [2021-06-12 20:05:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:25,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958664947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:25,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:25,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:05:25,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28489311] [2021-06-12 20:05:25,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:05:25,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:25,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:05:25,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:05:25,746 INFO L87 Difference]: Start difference. First operand 488 states and 1539 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:25,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:25,927 INFO L93 Difference]: Finished difference Result 677 states and 2097 transitions. [2021-06-12 20:05:25,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:05:25,928 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:25,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:25,928 INFO L225 Difference]: With dead ends: 677 [2021-06-12 20:05:25,928 INFO L226 Difference]: Without dead ends: 654 [2021-06-12 20:05:25,929 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 173.4ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:05:25,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-06-12 20:05:25,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 487. [2021-06-12 20:05:25,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.168724279835391) internal successors, (1540), 486 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:25,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1540 transitions. [2021-06-12 20:05:25,934 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1540 transitions. Word has length 21 [2021-06-12 20:05:25,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:25,934 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1540 transitions. [2021-06-12 20:05:25,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:25,934 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1540 transitions. [2021-06-12 20:05:25,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:25,934 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:25,934 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:26,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 791 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4453 [2021-06-12 20:05:26,135 INFO L430 AbstractCegarLoop]: === Iteration 803 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:26,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:26,135 INFO L82 PathProgramCache]: Analyzing trace with hash 2093777185, now seen corresponding path program 791 times [2021-06-12 20:05:26,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:26,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452927123] [2021-06-12 20:05:26,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:26,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:26,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:26,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:26,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452927123] [2021-06-12 20:05:26,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452927123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:26,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112913723] [2021-06-12 20:05:26,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 792 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 792 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:26,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:05:26,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:26,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:05:26,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:26,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:26,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:26,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:26,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:26,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:26,298 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:26,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:26,300 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:26,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:26,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:05:26,327 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:101, output treesize:69 [2021-06-12 20:05:26,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:26,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:26,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:26,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:26,410 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:26,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:26,438 INFO L518 ElimStorePlain]: Eliminatee v_prenex_229 vanished before elimination [2021-06-12 20:05:26,438 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:05:26,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:26,441 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:26,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:26,468 INFO L518 ElimStorePlain]: Eliminatee v_prenex_231 vanished before elimination [2021-06-12 20:05:26,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:26,471 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:26,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:26,496 INFO L518 ElimStorePlain]: Eliminatee v_prenex_233 vanished before elimination [2021-06-12 20:05:26,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:05:26,497 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:105, output treesize:57 [2021-06-12 20:05:26,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:26,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112913723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:26,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:26,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:05:26,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375168048] [2021-06-12 20:05:26,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:05:26,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:26,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:05:26,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:05:26,615 INFO L87 Difference]: Start difference. First operand 487 states and 1540 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:27,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:27,057 INFO L93 Difference]: Finished difference Result 896 states and 2734 transitions. [2021-06-12 20:05:27,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:05:27,057 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:27,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:27,058 INFO L225 Difference]: With dead ends: 896 [2021-06-12 20:05:27,058 INFO L226 Difference]: Without dead ends: 848 [2021-06-12 20:05:27,058 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 475.3ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:05:27,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2021-06-12 20:05:27,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 486. [2021-06-12 20:05:27,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.162886597938144) internal successors, (1534), 485 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:27,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1534 transitions. [2021-06-12 20:05:27,065 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1534 transitions. Word has length 21 [2021-06-12 20:05:27,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:27,065 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1534 transitions. [2021-06-12 20:05:27,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:27,065 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1534 transitions. [2021-06-12 20:05:27,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:27,066 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:27,066 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:27,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4459,792 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:27,266 INFO L430 AbstractCegarLoop]: === Iteration 804 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:27,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:27,266 INFO L82 PathProgramCache]: Analyzing trace with hash -125500321, now seen corresponding path program 792 times [2021-06-12 20:05:27,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:27,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786969004] [2021-06-12 20:05:27,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:27,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:27,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786969004] [2021-06-12 20:05:27,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786969004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:27,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943349983] [2021-06-12 20:05:27,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 793 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 793 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:27,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:05:27,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:27,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:27,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:27,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:27,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:27,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:27,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:27,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:27,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:05:27,452 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:05:27,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:27,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:27,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:27,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:27,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:27,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:27,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:27,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:27,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:27,524 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:10 [2021-06-12 20:05:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:27,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943349983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:27,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:27,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:05:27,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204117937] [2021-06-12 20:05:27,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:27,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:27,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:27,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:27,540 INFO L87 Difference]: Start difference. First operand 486 states and 1534 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:27,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:27,682 INFO L93 Difference]: Finished difference Result 638 states and 1969 transitions. [2021-06-12 20:05:27,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:27,683 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:27,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:27,683 INFO L225 Difference]: With dead ends: 638 [2021-06-12 20:05:27,683 INFO L226 Difference]: Without dead ends: 617 [2021-06-12 20:05:27,684 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 148.0ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:27,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-06-12 20:05:27,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 481. [2021-06-12 20:05:27,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.15) internal successors, (1512), 480 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:27,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1512 transitions. [2021-06-12 20:05:27,689 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1512 transitions. Word has length 21 [2021-06-12 20:05:27,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:27,689 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1512 transitions. [2021-06-12 20:05:27,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:27,689 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1512 transitions. [2021-06-12 20:05:27,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:27,689 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:27,690 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:27,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4469,793 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:27,890 INFO L430 AbstractCegarLoop]: === Iteration 805 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:27,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:27,890 INFO L82 PathProgramCache]: Analyzing trace with hash -516948893, now seen corresponding path program 793 times [2021-06-12 20:05:27,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:27,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462958694] [2021-06-12 20:05:27,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:27,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:27,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:27,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:27,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462958694] [2021-06-12 20:05:27,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462958694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:27,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575883525] [2021-06-12 20:05:27,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 794 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 794 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:27,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:27,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:28,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:28,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:28,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:28,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:28,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-06-12 20:05:28,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:05:28,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:28,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:05:28,050 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:28,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:28,059 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:05:28,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:28,060 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-06-12 20:05:28,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:28,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575883525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:28,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:28,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:05:28,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835710737] [2021-06-12 20:05:28,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:05:28,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:28,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:05:28,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:28,093 INFO L87 Difference]: Start difference. First operand 481 states and 1512 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:28,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:28,236 INFO L93 Difference]: Finished difference Result 620 states and 1915 transitions. [2021-06-12 20:05:28,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:28,236 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:28,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:28,237 INFO L225 Difference]: With dead ends: 620 [2021-06-12 20:05:28,237 INFO L226 Difference]: Without dead ends: 584 [2021-06-12 20:05:28,237 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:28,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-06-12 20:05:28,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 482. [2021-06-12 20:05:28,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.1538461538461537) internal successors, (1517), 481 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:28,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1517 transitions. [2021-06-12 20:05:28,246 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1517 transitions. Word has length 21 [2021-06-12 20:05:28,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:28,246 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1517 transitions. [2021-06-12 20:05:28,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:28,246 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1517 transitions. [2021-06-12 20:05:28,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:28,246 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:28,246 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:28,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4473,794 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:28,447 INFO L430 AbstractCegarLoop]: === Iteration 806 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:28,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:28,447 INFO L82 PathProgramCache]: Analyzing trace with hash -219682483, now seen corresponding path program 794 times [2021-06-12 20:05:28,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:28,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764006464] [2021-06-12 20:05:28,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:28,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:28,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:28,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:28,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764006464] [2021-06-12 20:05:28,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764006464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:28,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878168882] [2021-06-12 20:05:28,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 795 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 795 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:28,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:28,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:28,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:28,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:28,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:28,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:28,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:28,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:28,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:28,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:28,606 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:05:28,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:28,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:28,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:28,645 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:05:28,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:28,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:28,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:28,655 INFO L518 ElimStorePlain]: Eliminatee v_prenex_235 vanished before elimination [2021-06-12 20:05:28,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:28,656 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:19 [2021-06-12 20:05:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:28,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878168882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:28,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:28,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:05:28,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10385777] [2021-06-12 20:05:28,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:05:28,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:28,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:05:28,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:05:28,725 INFO L87 Difference]: Start difference. First operand 482 states and 1517 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:28,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:28,960 INFO L93 Difference]: Finished difference Result 703 states and 2163 transitions. [2021-06-12 20:05:28,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:05:28,960 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:28,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:28,961 INFO L225 Difference]: With dead ends: 703 [2021-06-12 20:05:28,961 INFO L226 Difference]: Without dead ends: 680 [2021-06-12 20:05:28,961 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 227.6ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:05:28,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-06-12 20:05:28,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 497. [2021-06-12 20:05:28,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.1693548387096775) internal successors, (1572), 496 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:28,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1572 transitions. [2021-06-12 20:05:28,966 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1572 transitions. Word has length 21 [2021-06-12 20:05:28,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:28,967 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1572 transitions. [2021-06-12 20:05:28,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:28,967 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1572 transitions. [2021-06-12 20:05:28,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:28,967 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:28,967 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:29,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4476,795 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:29,168 INFO L430 AbstractCegarLoop]: === Iteration 807 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:29,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:29,168 INFO L82 PathProgramCache]: Analyzing trace with hash -503945167, now seen corresponding path program 795 times [2021-06-12 20:05:29,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:29,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633849507] [2021-06-12 20:05:29,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:29,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:29,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:29,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:29,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633849507] [2021-06-12 20:05:29,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633849507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:29,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182523823] [2021-06-12 20:05:29,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 796 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 796 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:29,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:05:29,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:29,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:29,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:29,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:29,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:29,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:29,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:29,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:29,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:29,338 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:05:29,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:29,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:29,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:29,374 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:05:29,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:29,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:29,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:29,385 INFO L518 ElimStorePlain]: Eliminatee v_prenex_237 vanished before elimination [2021-06-12 20:05:29,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:29,386 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:19 [2021-06-12 20:05:29,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:29,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182523823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:29,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:29,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:05:29,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134242991] [2021-06-12 20:05:29,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:05:29,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:29,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:05:29,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:05:29,458 INFO L87 Difference]: Start difference. First operand 497 states and 1572 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:29,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:29,768 INFO L93 Difference]: Finished difference Result 803 states and 2476 transitions. [2021-06-12 20:05:29,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:05:29,768 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:29,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:29,769 INFO L225 Difference]: With dead ends: 803 [2021-06-12 20:05:29,769 INFO L226 Difference]: Without dead ends: 776 [2021-06-12 20:05:29,769 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 267.7ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:05:29,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2021-06-12 20:05:29,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 503. [2021-06-12 20:05:29,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 3.1673306772908365) internal successors, (1590), 502 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:29,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1590 transitions. [2021-06-12 20:05:29,775 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1590 transitions. Word has length 21 [2021-06-12 20:05:29,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:29,775 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1590 transitions. [2021-06-12 20:05:29,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:29,776 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1590 transitions. [2021-06-12 20:05:29,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:29,776 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:29,776 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:29,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 796 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4484 [2021-06-12 20:05:29,977 INFO L430 AbstractCegarLoop]: === Iteration 808 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:29,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:29,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1830275163, now seen corresponding path program 796 times [2021-06-12 20:05:29,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:29,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020419016] [2021-06-12 20:05:29,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:30,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:30,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:30,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020419016] [2021-06-12 20:05:30,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020419016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:30,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248283246] [2021-06-12 20:05:30,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 797 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 797 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:30,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:30,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:30,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:30,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:30,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:30,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:30,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:30,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:30,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:30,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:30,129 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:05:30,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:30,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:30,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:30,167 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:05:30,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:30,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:05:30,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:30,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248283246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:30,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:30,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:05:30,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59549474] [2021-06-12 20:05:30,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:05:30,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:30,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:05:30,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:30,183 INFO L87 Difference]: Start difference. First operand 503 states and 1590 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:30,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:30,327 INFO L93 Difference]: Finished difference Result 613 states and 1895 transitions. [2021-06-12 20:05:30,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:30,327 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:30,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:30,328 INFO L225 Difference]: With dead ends: 613 [2021-06-12 20:05:30,328 INFO L226 Difference]: Without dead ends: 594 [2021-06-12 20:05:30,328 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 138.1ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:05:30,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-12 20:05:30,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 487. [2021-06-12 20:05:30,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.1604938271604937) internal successors, (1536), 486 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:30,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1536 transitions. [2021-06-12 20:05:30,333 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1536 transitions. Word has length 21 [2021-06-12 20:05:30,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:30,333 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1536 transitions. [2021-06-12 20:05:30,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:30,333 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1536 transitions. [2021-06-12 20:05:30,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:30,334 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:30,334 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:30,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 797 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4495 [2021-06-12 20:05:30,534 INFO L430 AbstractCegarLoop]: === Iteration 809 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:30,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:30,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1919319479, now seen corresponding path program 797 times [2021-06-12 20:05:30,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:30,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101690187] [2021-06-12 20:05:30,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:30,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:30,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:30,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101690187] [2021-06-12 20:05:30,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101690187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:30,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781327331] [2021-06-12 20:05:30,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 798 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 798 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:30,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:05:30,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:30,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:30,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:30,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:30,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:30,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:30,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:30,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:30,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:30,689 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:05:30,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:30,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:30,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:30,749 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:05:30,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:30,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:05:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:30,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781327331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:30,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:30,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:05:30,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096290601] [2021-06-12 20:05:30,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:30,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:30,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:30,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:30,760 INFO L87 Difference]: Start difference. First operand 487 states and 1536 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:30,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:30,963 INFO L93 Difference]: Finished difference Result 646 states and 1989 transitions. [2021-06-12 20:05:30,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:30,963 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:30,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:30,964 INFO L225 Difference]: With dead ends: 646 [2021-06-12 20:05:30,964 INFO L226 Difference]: Without dead ends: 625 [2021-06-12 20:05:30,964 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 184.7ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:05:30,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-06-12 20:05:30,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 487. [2021-06-12 20:05:30,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.168724279835391) internal successors, (1540), 486 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:30,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1540 transitions. [2021-06-12 20:05:30,969 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1540 transitions. Word has length 21 [2021-06-12 20:05:30,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:30,970 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1540 transitions. [2021-06-12 20:05:30,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:30,970 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1540 transitions. [2021-06-12 20:05:30,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:30,970 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:30,970 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:31,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4498,798 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:31,171 INFO L430 AbstractCegarLoop]: === Iteration 810 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:31,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:31,171 INFO L82 PathProgramCache]: Analyzing trace with hash 656663135, now seen corresponding path program 798 times [2021-06-12 20:05:31,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:31,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216859255] [2021-06-12 20:05:31,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:31,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:31,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216859255] [2021-06-12 20:05:31,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216859255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:31,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524450894] [2021-06-12 20:05:31,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 799 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 799 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:31,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:05:31,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:31,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:31,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:31,367 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_238], 1=[o_2]} [2021-06-12 20:05:31,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:31,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:31,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:31,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:31,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:31,387 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:31,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:31,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:05:31,401 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:36 [2021-06-12 20:05:31,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:31,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:31,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:31,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:31,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:31,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:31,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:31,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:31,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:31,475 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:10 [2021-06-12 20:05:31,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:31,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524450894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:31,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:31,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:05:31,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915336142] [2021-06-12 20:05:31,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:31,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:31,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:31,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:31,490 INFO L87 Difference]: Start difference. First operand 487 states and 1540 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:31,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:31,705 INFO L93 Difference]: Finished difference Result 646 states and 1989 transitions. [2021-06-12 20:05:31,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:31,705 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:31,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:31,706 INFO L225 Difference]: With dead ends: 646 [2021-06-12 20:05:31,706 INFO L226 Difference]: Without dead ends: 625 [2021-06-12 20:05:31,706 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 254.2ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:05:31,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-06-12 20:05:31,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 483. [2021-06-12 20:05:31,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 3.159751037344398) internal successors, (1523), 482 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:31,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1523 transitions. [2021-06-12 20:05:31,711 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1523 transitions. Word has length 21 [2021-06-12 20:05:31,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:31,711 INFO L482 AbstractCegarLoop]: Abstraction has 483 states and 1523 transitions. [2021-06-12 20:05:31,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:31,711 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1523 transitions. [2021-06-12 20:05:31,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:31,712 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:31,712 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:31,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 799 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4504 [2021-06-12 20:05:31,913 INFO L430 AbstractCegarLoop]: === Iteration 811 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:31,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:31,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2053050313, now seen corresponding path program 799 times [2021-06-12 20:05:31,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:31,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130819181] [2021-06-12 20:05:31,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:32,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:32,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:32,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130819181] [2021-06-12 20:05:32,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130819181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:32,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418895932] [2021-06-12 20:05:32,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 800 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 800 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:32,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:32,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:32,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:32,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:32,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:32,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:32,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:32,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:05:32,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:32,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:32,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:32,114 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:05:32,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:32,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:05:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:32,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418895932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:32,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:32,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:05:32,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9035908] [2021-06-12 20:05:32,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:05:32,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:32,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:05:32,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:05:32,143 INFO L87 Difference]: Start difference. First operand 483 states and 1523 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:32,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:32,316 INFO L93 Difference]: Finished difference Result 760 states and 2346 transitions. [2021-06-12 20:05:32,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:05:32,316 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:32,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:32,317 INFO L225 Difference]: With dead ends: 760 [2021-06-12 20:05:32,317 INFO L226 Difference]: Without dead ends: 739 [2021-06-12 20:05:32,318 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 178.1ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:05:32,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-06-12 20:05:32,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 489. [2021-06-12 20:05:32,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 3.1639344262295084) internal successors, (1544), 488 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:32,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1544 transitions. [2021-06-12 20:05:32,323 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1544 transitions. Word has length 21 [2021-06-12 20:05:32,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:32,323 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1544 transitions. [2021-06-12 20:05:32,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:32,323 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1544 transitions. [2021-06-12 20:05:32,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:32,324 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:32,324 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:32,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4509,800 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:32,524 INFO L430 AbstractCegarLoop]: === Iteration 812 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:32,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:32,525 INFO L82 PathProgramCache]: Analyzing trace with hash 723122151, now seen corresponding path program 800 times [2021-06-12 20:05:32,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:32,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878149257] [2021-06-12 20:05:32,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:32,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:32,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:32,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878149257] [2021-06-12 20:05:32,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878149257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:32,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019448244] [2021-06-12 20:05:32,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 801 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 801 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:32,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:32,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:32,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:32,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:32,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:32,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:32,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:32,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:32,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-06-12 20:05:32,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:32,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:32,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:32,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:32,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:32,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:32,738 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:32,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:32,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:32,744 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:10 [2021-06-12 20:05:32,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:32,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019448244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:32,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:32,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:05:32,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465978176] [2021-06-12 20:05:32,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:32,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:32,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:32,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:32,759 INFO L87 Difference]: Start difference. First operand 489 states and 1544 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:32,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:32,909 INFO L93 Difference]: Finished difference Result 633 states and 1959 transitions. [2021-06-12 20:05:32,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:32,909 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:32,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:32,910 INFO L225 Difference]: With dead ends: 633 [2021-06-12 20:05:32,910 INFO L226 Difference]: Without dead ends: 612 [2021-06-12 20:05:32,910 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 131.7ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:32,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-12 20:05:32,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 486. [2021-06-12 20:05:32,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.158762886597938) internal successors, (1532), 485 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:32,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1532 transitions. [2021-06-12 20:05:32,915 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1532 transitions. Word has length 21 [2021-06-12 20:05:32,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:32,916 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1532 transitions. [2021-06-12 20:05:32,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:32,916 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1532 transitions. [2021-06-12 20:05:32,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:32,916 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:32,916 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:33,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4511,801 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:33,117 INFO L430 AbstractCegarLoop]: === Iteration 813 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:33,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:33,117 INFO L82 PathProgramCache]: Analyzing trace with hash -191959337, now seen corresponding path program 801 times [2021-06-12 20:05:33,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:33,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361784815] [2021-06-12 20:05:33,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:33,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:33,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:33,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:33,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361784815] [2021-06-12 20:05:33,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361784815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:33,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141520661] [2021-06-12 20:05:33,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 802 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 802 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:33,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:05:33,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:33,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:33,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:33,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:33,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:33,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:33,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:33,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:33,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-06-12 20:05:33,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:33,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:33,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:33,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:33,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:33,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:33,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:33,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:33,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:33,384 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:10 [2021-06-12 20:05:33,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:33,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141520661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:33,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:33,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:33,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263823427] [2021-06-12 20:05:33,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:33,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:33,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:33,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:33,434 INFO L87 Difference]: Start difference. First operand 486 states and 1532 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:33,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:33,691 INFO L93 Difference]: Finished difference Result 768 states and 2368 transitions. [2021-06-12 20:05:33,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:05:33,691 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:33,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:33,692 INFO L225 Difference]: With dead ends: 768 [2021-06-12 20:05:33,692 INFO L226 Difference]: Without dead ends: 747 [2021-06-12 20:05:33,692 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 264.6ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:05:33,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2021-06-12 20:05:33,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 482. [2021-06-12 20:05:33,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.158004158004158) internal successors, (1519), 481 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:33,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1519 transitions. [2021-06-12 20:05:33,698 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1519 transitions. Word has length 21 [2021-06-12 20:05:33,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:33,698 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1519 transitions. [2021-06-12 20:05:33,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:33,698 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1519 transitions. [2021-06-12 20:05:33,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:33,698 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:33,698 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:33,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4513,802 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:33,899 INFO L430 AbstractCegarLoop]: === Iteration 814 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:33,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:33,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1400915743, now seen corresponding path program 802 times [2021-06-12 20:05:33,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:33,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695207735] [2021-06-12 20:05:33,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:33,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:33,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695207735] [2021-06-12 20:05:33,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695207735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:33,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007120046] [2021-06-12 20:05:33,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 803 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 803 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:34,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:34,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:34,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:34,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:34,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:34,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:34,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:34,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:34,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 20:05:34,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:34,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:34,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:34,063 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:05:34,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:34,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:05:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:34,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007120046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:34,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:34,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:05:34,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082723718] [2021-06-12 20:05:34,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:05:34,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:34,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:05:34,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:05:34,090 INFO L87 Difference]: Start difference. First operand 482 states and 1519 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:34,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:34,664 INFO L93 Difference]: Finished difference Result 916 states and 2778 transitions. [2021-06-12 20:05:34,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:05:34,665 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:34,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:34,666 INFO L225 Difference]: With dead ends: 916 [2021-06-12 20:05:34,666 INFO L226 Difference]: Without dead ends: 895 [2021-06-12 20:05:34,666 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 439.5ms TimeCoverageRelationStatistics Valid=225, Invalid=897, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:05:34,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-06-12 20:05:34,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 480. [2021-06-12 20:05:34,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.1419624217119) internal successors, (1505), 479 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:34,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1505 transitions. [2021-06-12 20:05:34,673 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1505 transitions. Word has length 21 [2021-06-12 20:05:34,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:34,673 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1505 transitions. [2021-06-12 20:05:34,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:34,673 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1505 transitions. [2021-06-12 20:05:34,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:34,673 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:34,673 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:34,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 803 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4516 [2021-06-12 20:05:34,874 INFO L430 AbstractCegarLoop]: === Iteration 815 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:34,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:34,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1283658241, now seen corresponding path program 803 times [2021-06-12 20:05:34,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:34,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325477490] [2021-06-12 20:05:34,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:34,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:34,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325477490] [2021-06-12 20:05:34,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325477490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:34,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329724585] [2021-06-12 20:05:34,956 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 804 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 804 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:34,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:05:34,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:34,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:05:34,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:35,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:35,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:35,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:35,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:35,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:05:35,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:35,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:35,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:35,077 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:35,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:35,091 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:05:35,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:35,092 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:31 [2021-06-12 20:05:35,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:35,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329724585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:35,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:35,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:05:35,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106793577] [2021-06-12 20:05:35,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:05:35,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:35,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:05:35,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:05:35,166 INFO L87 Difference]: Start difference. First operand 480 states and 1505 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:35,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:35,465 INFO L93 Difference]: Finished difference Result 770 states and 2358 transitions. [2021-06-12 20:05:35,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:05:35,465 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:35,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:35,466 INFO L225 Difference]: With dead ends: 770 [2021-06-12 20:05:35,466 INFO L226 Difference]: Without dead ends: 749 [2021-06-12 20:05:35,467 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 275.5ms TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:05:35,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-06-12 20:05:35,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 459. [2021-06-12 20:05:35,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 3.12882096069869) internal successors, (1433), 458 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:35,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1433 transitions. [2021-06-12 20:05:35,472 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1433 transitions. Word has length 21 [2021-06-12 20:05:35,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:35,472 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 1433 transitions. [2021-06-12 20:05:35,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:35,472 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1433 transitions. [2021-06-12 20:05:35,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:35,473 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:35,473 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:35,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4518,804 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:35,673 INFO L430 AbstractCegarLoop]: === Iteration 816 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:35,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:35,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1900494295, now seen corresponding path program 804 times [2021-06-12 20:05:35,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:35,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070566334] [2021-06-12 20:05:35,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:35,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:35,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:35,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070566334] [2021-06-12 20:05:35,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070566334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:35,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596182862] [2021-06-12 20:05:35,751 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 805 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 805 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:35,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:05:35,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:35,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:35,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:35,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:35,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:35,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:35,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:35,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:05:35,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:35,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:35,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:35,855 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:05:35,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:35,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:05:35,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:35,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596182862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:35,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:35,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:05:35,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961257102] [2021-06-12 20:05:35,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:05:35,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:35,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:05:35,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:35,864 INFO L87 Difference]: Start difference. First operand 459 states and 1433 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:35,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:35,970 INFO L93 Difference]: Finished difference Result 605 states and 1861 transitions. [2021-06-12 20:05:35,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:35,971 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:35,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:35,971 INFO L225 Difference]: With dead ends: 605 [2021-06-12 20:05:35,971 INFO L226 Difference]: Without dead ends: 583 [2021-06-12 20:05:35,971 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:35,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-06-12 20:05:35,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 465. [2021-06-12 20:05:35,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.1336206896551726) internal successors, (1454), 464 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:35,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1454 transitions. [2021-06-12 20:05:35,976 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1454 transitions. Word has length 21 [2021-06-12 20:05:35,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:35,976 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1454 transitions. [2021-06-12 20:05:35,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:35,976 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1454 transitions. [2021-06-12 20:05:35,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:35,977 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:35,977 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:36,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 805 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4524 [2021-06-12 20:05:36,177 INFO L430 AbstractCegarLoop]: === Iteration 817 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:36,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:36,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1398702959, now seen corresponding path program 805 times [2021-06-12 20:05:36,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:36,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085175025] [2021-06-12 20:05:36,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:36,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:36,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085175025] [2021-06-12 20:05:36,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085175025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:36,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406679222] [2021-06-12 20:05:36,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 806 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 806 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:36,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:36,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:36,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:36,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:36,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:36,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:36,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:36,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:05:36,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:36,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:36,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:36,341 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:05:36,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:36,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:05:36,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:36,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406679222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:36,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:36,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:05:36,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385450260] [2021-06-12 20:05:36,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:05:36,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:36,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:05:36,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:05:36,355 INFO L87 Difference]: Start difference. First operand 465 states and 1454 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:36,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:36,489 INFO L93 Difference]: Finished difference Result 614 states and 1885 transitions. [2021-06-12 20:05:36,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:36,489 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:36,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:36,490 INFO L225 Difference]: With dead ends: 614 [2021-06-12 20:05:36,490 INFO L226 Difference]: Without dead ends: 592 [2021-06-12 20:05:36,490 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:36,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-12 20:05:36,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 462. [2021-06-12 20:05:36,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.1279826464208242) internal successors, (1442), 461 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:36,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1442 transitions. [2021-06-12 20:05:36,495 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1442 transitions. Word has length 21 [2021-06-12 20:05:36,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:36,495 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1442 transitions. [2021-06-12 20:05:36,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:36,495 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1442 transitions. [2021-06-12 20:05:36,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:36,496 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:36,496 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:36,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4526,806 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:36,696 INFO L430 AbstractCegarLoop]: === Iteration 818 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:36,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:36,696 INFO L82 PathProgramCache]: Analyzing trace with hash -708081161, now seen corresponding path program 806 times [2021-06-12 20:05:36,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:36,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790404921] [2021-06-12 20:05:36,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:36,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:36,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790404921] [2021-06-12 20:05:36,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790404921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:36,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123533390] [2021-06-12 20:05:36,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 807 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 807 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:36,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:36,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:36,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:36,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:36,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:36,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:36,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:36,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:36,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 20:05:36,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:36,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:36,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:36,857 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:05:36,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:36,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:05:36,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:36,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123533390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:36,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:36,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:05:36,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249302650] [2021-06-12 20:05:36,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:05:36,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:36,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:05:36,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:05:36,872 INFO L87 Difference]: Start difference. First operand 462 states and 1442 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:36,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:36,970 INFO L93 Difference]: Finished difference Result 602 states and 1852 transitions. [2021-06-12 20:05:36,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:36,970 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:36,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:36,971 INFO L225 Difference]: With dead ends: 602 [2021-06-12 20:05:36,971 INFO L226 Difference]: Without dead ends: 580 [2021-06-12 20:05:36,971 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:05:36,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-06-12 20:05:36,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 459. [2021-06-12 20:05:36,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 3.12882096069869) internal successors, (1433), 458 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:36,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1433 transitions. [2021-06-12 20:05:36,976 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1433 transitions. Word has length 21 [2021-06-12 20:05:36,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:36,976 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 1433 transitions. [2021-06-12 20:05:36,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:36,976 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1433 transitions. [2021-06-12 20:05:36,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:36,977 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:36,977 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:37,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 807 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4528 [2021-06-12 20:05:37,177 INFO L430 AbstractCegarLoop]: === Iteration 819 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:37,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:37,177 INFO L82 PathProgramCache]: Analyzing trace with hash 332154637, now seen corresponding path program 807 times [2021-06-12 20:05:37,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:37,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516400356] [2021-06-12 20:05:37,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:37,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:37,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:37,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516400356] [2021-06-12 20:05:37,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516400356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:37,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218741289] [2021-06-12 20:05:37,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 808 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 808 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:37,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:05:37,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:37,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:37,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:37,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:37,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:37,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:37,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:37,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 20:05:37,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:37,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:37,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:37,327 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:05:37,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:37,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:05:37,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:37,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218741289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:37,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:37,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:05:37,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380605574] [2021-06-12 20:05:37,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:05:37,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:37,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:05:37,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:05:37,342 INFO L87 Difference]: Start difference. First operand 459 states and 1433 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:37,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:37,470 INFO L93 Difference]: Finished difference Result 680 states and 2080 transitions. [2021-06-12 20:05:37,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:37,470 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:37,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:37,471 INFO L225 Difference]: With dead ends: 680 [2021-06-12 20:05:37,471 INFO L226 Difference]: Without dead ends: 658 [2021-06-12 20:05:37,471 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:05:37,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-06-12 20:05:37,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 456. [2021-06-12 20:05:37,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.1296703296703297) internal successors, (1424), 455 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:37,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1424 transitions. [2021-06-12 20:05:37,476 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1424 transitions. Word has length 21 [2021-06-12 20:05:37,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:37,476 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1424 transitions. [2021-06-12 20:05:37,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:37,476 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1424 transitions. [2021-06-12 20:05:37,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:37,477 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:37,477 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:37,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 808 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4530 [2021-06-12 20:05:37,677 INFO L430 AbstractCegarLoop]: === Iteration 820 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:37,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:37,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1964035979, now seen corresponding path program 808 times [2021-06-12 20:05:37,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:37,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291841405] [2021-06-12 20:05:37,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:37,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:37,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291841405] [2021-06-12 20:05:37,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291841405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:37,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724221567] [2021-06-12 20:05:37,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 809 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 809 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:37,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:37,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:37,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:37,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:37,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:37,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:37,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:37,859 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:37,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:37,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:37,869 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:45, output treesize:29 [2021-06-12 20:05:37,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:37,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:37,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:37,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:37,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:37,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:37,922 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:37,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:37,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:37,927 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:7 [2021-06-12 20:05:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:37,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724221567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:37,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:37,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:37,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073167146] [2021-06-12 20:05:37,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:37,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:37,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:37,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:37,955 INFO L87 Difference]: Start difference. First operand 456 states and 1424 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:38,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:38,281 INFO L93 Difference]: Finished difference Result 696 states and 2138 transitions. [2021-06-12 20:05:38,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:05:38,281 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:38,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:38,282 INFO L225 Difference]: With dead ends: 696 [2021-06-12 20:05:38,282 INFO L226 Difference]: Without dead ends: 677 [2021-06-12 20:05:38,282 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 285.1ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:05:38,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-06-12 20:05:38,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 468. [2021-06-12 20:05:38,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.139186295503212) internal successors, (1466), 467 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:38,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1466 transitions. [2021-06-12 20:05:38,287 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1466 transitions. Word has length 21 [2021-06-12 20:05:38,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:38,288 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1466 transitions. [2021-06-12 20:05:38,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:38,288 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1466 transitions. [2021-06-12 20:05:38,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:38,288 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:38,288 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:38,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4532,809 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:38,489 INFO L430 AbstractCegarLoop]: === Iteration 821 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:38,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:38,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1741827367, now seen corresponding path program 809 times [2021-06-12 20:05:38,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:38,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873810063] [2021-06-12 20:05:38,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:38,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:38,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873810063] [2021-06-12 20:05:38,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873810063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:38,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623294635] [2021-06-12 20:05:38,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 810 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 810 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:38,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:38,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:38,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:38,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:38,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:38,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:38,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:38,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:38,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:23 [2021-06-12 20:05:38,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:38,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:38,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:38,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:38,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:05:38,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:38,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:38,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:38,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:38,721 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:38,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:38,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:38,727 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:41, output treesize:5 [2021-06-12 20:05:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:38,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623294635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:38,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:38,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:38,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626309045] [2021-06-12 20:05:38,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:38,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:38,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:38,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:38,753 INFO L87 Difference]: Start difference. First operand 468 states and 1466 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:39,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:39,499 INFO L93 Difference]: Finished difference Result 992 states and 2992 transitions. [2021-06-12 20:05:39,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:05:39,499 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:39,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:39,500 INFO L225 Difference]: With dead ends: 992 [2021-06-12 20:05:39,500 INFO L226 Difference]: Without dead ends: 932 [2021-06-12 20:05:39,500 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 604.8ms TimeCoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:05:39,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-06-12 20:05:39,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 476. [2021-06-12 20:05:39,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.134736842105263) internal successors, (1489), 475 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:39,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1489 transitions. [2021-06-12 20:05:39,506 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1489 transitions. Word has length 21 [2021-06-12 20:05:39,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:39,506 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1489 transitions. [2021-06-12 20:05:39,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:39,507 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1489 transitions. [2021-06-12 20:05:39,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:39,507 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:39,507 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:39,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4535,810 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:39,708 INFO L430 AbstractCegarLoop]: === Iteration 822 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:39,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:39,708 INFO L82 PathProgramCache]: Analyzing trace with hash -644539477, now seen corresponding path program 810 times [2021-06-12 20:05:39,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:39,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852527594] [2021-06-12 20:05:39,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:39,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:39,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852527594] [2021-06-12 20:05:39,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852527594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:39,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299271316] [2021-06-12 20:05:39,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 811 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 811 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:39,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:05:39,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:39,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:39,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:39,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:39,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:39,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:39,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:39,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:39,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:39,896 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:45, output treesize:29 [2021-06-12 20:05:39,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:39,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:39,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:39,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:39,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:39,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:39,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:39,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:39,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:39,945 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:39,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:39,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:39,958 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:13 [2021-06-12 20:05:40,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:40,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299271316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:40,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:40,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:40,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471568851] [2021-06-12 20:05:40,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:40,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:40,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:40,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:40,005 INFO L87 Difference]: Start difference. First operand 476 states and 1489 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:40,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:40,403 INFO L93 Difference]: Finished difference Result 785 states and 2415 transitions. [2021-06-12 20:05:40,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:05:40,403 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:40,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:40,404 INFO L225 Difference]: With dead ends: 785 [2021-06-12 20:05:40,404 INFO L226 Difference]: Without dead ends: 762 [2021-06-12 20:05:40,404 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 321.7ms TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:05:40,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-06-12 20:05:40,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 474. [2021-06-12 20:05:40,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.1374207188160677) internal successors, (1484), 473 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:40,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1484 transitions. [2021-06-12 20:05:40,410 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1484 transitions. Word has length 21 [2021-06-12 20:05:40,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:40,410 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1484 transitions. [2021-06-12 20:05:40,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:40,410 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1484 transitions. [2021-06-12 20:05:40,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:40,410 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:40,411 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:40,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 811 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4541 [2021-06-12 20:05:40,611 INFO L430 AbstractCegarLoop]: === Iteration 823 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:40,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:40,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1530337757, now seen corresponding path program 811 times [2021-06-12 20:05:40,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:40,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243380543] [2021-06-12 20:05:40,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:40,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:40,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:40,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:40,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243380543] [2021-06-12 20:05:40,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243380543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:40,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140454615] [2021-06-12 20:05:40,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 812 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 812 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:40,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:40,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:40,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:40,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:40,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:40,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:40,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:40,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:40,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-06-12 20:05:40,823 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_2]} [2021-06-12 20:05:40,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:40,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:40,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:05:40,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:40,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:40,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:40,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:40,844 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:40,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:40,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:40,857 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:59, output treesize:13 [2021-06-12 20:05:40,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:40,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140454615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:40,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:40,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:40,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911982973] [2021-06-12 20:05:40,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:40,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:40,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:40,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:40,904 INFO L87 Difference]: Start difference. First operand 474 states and 1484 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:41,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:41,220 INFO L93 Difference]: Finished difference Result 784 states and 2409 transitions. [2021-06-12 20:05:41,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:05:41,220 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:41,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:41,221 INFO L225 Difference]: With dead ends: 784 [2021-06-12 20:05:41,222 INFO L226 Difference]: Without dead ends: 757 [2021-06-12 20:05:41,222 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 240.4ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:05:41,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-06-12 20:05:41,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 474. [2021-06-12 20:05:41,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.1374207188160677) internal successors, (1484), 473 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:41,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1484 transitions. [2021-06-12 20:05:41,227 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1484 transitions. Word has length 21 [2021-06-12 20:05:41,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:41,227 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1484 transitions. [2021-06-12 20:05:41,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:41,228 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1484 transitions. [2021-06-12 20:05:41,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:41,228 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:41,228 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:41,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 812 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4546 [2021-06-12 20:05:41,429 INFO L430 AbstractCegarLoop]: === Iteration 824 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:41,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:41,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1814600441, now seen corresponding path program 812 times [2021-06-12 20:05:41,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:41,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346173909] [2021-06-12 20:05:41,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:41,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:41,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346173909] [2021-06-12 20:05:41,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346173909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:41,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096308326] [2021-06-12 20:05:41,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 813 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 813 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:41,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:41,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:41,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:41,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:41,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:41,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:41,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:41,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:41,608 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:41,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:41,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:05:41,618 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:27 [2021-06-12 20:05:41,650 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_239, o_0, v_prenex_240], 1=[o_2]} [2021-06-12 20:05:41,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:41,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:41,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:41,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:41,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:41,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:41,674 INFO L518 ElimStorePlain]: Eliminatee v_prenex_240 vanished before elimination [2021-06-12 20:05:41,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:41,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:41,677 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:41,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:41,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:41,685 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:45, output treesize:13 [2021-06-12 20:05:41,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:41,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096308326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:41,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:41,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:41,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238805293] [2021-06-12 20:05:41,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:41,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:41,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:41,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:41,740 INFO L87 Difference]: Start difference. First operand 474 states and 1484 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:42,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:42,405 INFO L93 Difference]: Finished difference Result 963 states and 2928 transitions. [2021-06-12 20:05:42,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:05:42,406 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:42,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:42,407 INFO L225 Difference]: With dead ends: 963 [2021-06-12 20:05:42,407 INFO L226 Difference]: Without dead ends: 936 [2021-06-12 20:05:42,407 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 439.3ms TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:05:42,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-06-12 20:05:42,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 488. [2021-06-12 20:05:42,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.131416837782341) internal successors, (1525), 487 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:42,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1525 transitions. [2021-06-12 20:05:42,413 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1525 transitions. Word has length 21 [2021-06-12 20:05:42,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:42,413 INFO L482 AbstractCegarLoop]: Abstraction has 488 states and 1525 transitions. [2021-06-12 20:05:42,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:42,413 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1525 transitions. [2021-06-12 20:05:42,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:42,414 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:42,414 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:42,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 813 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4550 [2021-06-12 20:05:42,614 INFO L430 AbstractCegarLoop]: === Iteration 825 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:42,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:42,615 INFO L82 PathProgramCache]: Analyzing trace with hash -128208601, now seen corresponding path program 813 times [2021-06-12 20:05:42,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:42,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811802201] [2021-06-12 20:05:42,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:42,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:42,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:42,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811802201] [2021-06-12 20:05:42,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811802201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:42,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94099064] [2021-06-12 20:05:42,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 814 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 814 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:42,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:05:42,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:42,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:42,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:42,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:42,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:42,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:42,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:42,834 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:42,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:42,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:05:42,843 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:27 [2021-06-12 20:05:42,892 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_2]} [2021-06-12 20:05:42,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:42,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:42,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:42,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:42,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:42,901 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:42,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:42,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:42,906 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:7 [2021-06-12 20:05:42,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:42,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94099064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:42,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:42,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:42,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573306092] [2021-06-12 20:05:42,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:42,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:42,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:42,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:42,936 INFO L87 Difference]: Start difference. First operand 488 states and 1525 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:43,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:43,392 INFO L93 Difference]: Finished difference Result 829 states and 2543 transitions. [2021-06-12 20:05:43,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:05:43,393 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:43,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:43,394 INFO L225 Difference]: With dead ends: 829 [2021-06-12 20:05:43,394 INFO L226 Difference]: Without dead ends: 808 [2021-06-12 20:05:43,394 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 393.8ms TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:05:43,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-06-12 20:05:43,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 470. [2021-06-12 20:05:43,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.142857142857143) internal successors, (1474), 469 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:43,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1474 transitions. [2021-06-12 20:05:43,400 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1474 transitions. Word has length 21 [2021-06-12 20:05:43,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:43,400 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1474 transitions. [2021-06-12 20:05:43,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:43,400 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1474 transitions. [2021-06-12 20:05:43,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:43,400 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:43,400 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:43,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 814 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4562 [2021-06-12 20:05:43,601 INFO L430 AbstractCegarLoop]: === Iteration 826 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:43,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:43,601 INFO L82 PathProgramCache]: Analyzing trace with hash 652200909, now seen corresponding path program 814 times [2021-06-12 20:05:43,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:43,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092242284] [2021-06-12 20:05:43,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:43,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:43,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:43,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092242284] [2021-06-12 20:05:43,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092242284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:43,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594936350] [2021-06-12 20:05:43,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 815 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 815 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:43,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:43,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:43,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:43,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:43,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:43,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:43,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:43,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:43,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:43,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:25 [2021-06-12 20:05:43,822 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_2]} [2021-06-12 20:05:43,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:43,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:43,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:05:43,828 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:43,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:43,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:43,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:43,842 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:43,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:43,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:43,855 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:59, output treesize:13 [2021-06-12 20:05:43,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:43,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594936350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:43,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:43,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:43,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669196806] [2021-06-12 20:05:43,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:43,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:43,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:43,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:43,902 INFO L87 Difference]: Start difference. First operand 470 states and 1474 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:44,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:44,321 INFO L93 Difference]: Finished difference Result 855 states and 2616 transitions. [2021-06-12 20:05:44,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:05:44,322 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:44,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:44,323 INFO L225 Difference]: With dead ends: 855 [2021-06-12 20:05:44,323 INFO L226 Difference]: Without dead ends: 824 [2021-06-12 20:05:44,323 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 305.2ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:05:44,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-06-12 20:05:44,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 472. [2021-06-12 20:05:44,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.140127388535032) internal successors, (1479), 471 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:44,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1479 transitions. [2021-06-12 20:05:44,329 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1479 transitions. Word has length 21 [2021-06-12 20:05:44,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:44,329 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1479 transitions. [2021-06-12 20:05:44,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:44,329 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1479 transitions. [2021-06-12 20:05:44,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:44,330 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:44,330 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:44,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4569,815 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:44,530 INFO L430 AbstractCegarLoop]: === Iteration 827 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:44,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:44,530 INFO L82 PathProgramCache]: Analyzing trace with hash 367938225, now seen corresponding path program 815 times [2021-06-12 20:05:44,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:44,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048898099] [2021-06-12 20:05:44,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:44,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:44,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:44,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048898099] [2021-06-12 20:05:44,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048898099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:44,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187189213] [2021-06-12 20:05:44,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 816 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 816 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:44,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:05:44,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:44,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:44,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:44,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:44,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:44,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:44,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:44,703 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:44,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:44,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:05:44,709 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:20 [2021-06-12 20:05:44,771 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_241, v_prenex_242], 1=[o_2]} [2021-06-12 20:05:44,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:44,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:44,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:44,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:44,792 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:44,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:44,804 INFO L518 ElimStorePlain]: Eliminatee v_prenex_242 vanished before elimination [2021-06-12 20:05:44,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:44,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:44,808 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:44,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:44,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:44,820 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:45, output treesize:13 [2021-06-12 20:05:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:44,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187189213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:44,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:44,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:44,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494616981] [2021-06-12 20:05:44,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:44,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:44,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:44,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:44,875 INFO L87 Difference]: Start difference. First operand 472 states and 1479 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:45,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:45,711 INFO L93 Difference]: Finished difference Result 1099 states and 3357 transitions. [2021-06-12 20:05:45,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:05:45,711 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:45,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:45,712 INFO L225 Difference]: With dead ends: 1099 [2021-06-12 20:05:45,713 INFO L226 Difference]: Without dead ends: 1072 [2021-06-12 20:05:45,713 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 629.2ms TimeCoverageRelationStatistics Valid=225, Invalid=1035, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:05:45,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-06-12 20:05:45,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 486. [2021-06-12 20:05:45,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.134020618556701) internal successors, (1520), 485 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:45,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1520 transitions. [2021-06-12 20:05:45,720 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1520 transitions. Word has length 21 [2021-06-12 20:05:45,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:45,720 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1520 transitions. [2021-06-12 20:05:45,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:45,720 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1520 transitions. [2021-06-12 20:05:45,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:45,721 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:45,721 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:45,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 816 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4573 [2021-06-12 20:05:45,921 INFO L430 AbstractCegarLoop]: === Iteration 828 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:45,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:45,921 INFO L82 PathProgramCache]: Analyzing trace with hash 2054330065, now seen corresponding path program 816 times [2021-06-12 20:05:45,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:45,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608092048] [2021-06-12 20:05:45,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:45,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:45,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:45,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608092048] [2021-06-12 20:05:45,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608092048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:45,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398095953] [2021-06-12 20:05:45,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 817 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 817 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:46,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:05:46,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:46,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:46,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:46,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:46,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:46,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:46,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:46,080 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:46,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:46,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:05:46,086 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:20 [2021-06-12 20:05:46,149 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_2]} [2021-06-12 20:05:46,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:46,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:46,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:46,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:46,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:46,159 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:46,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:46,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:46,164 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:7 [2021-06-12 20:05:46,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:46,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398095953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:46,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:46,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:46,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480487108] [2021-06-12 20:05:46,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:46,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:46,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:46,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:46,193 INFO L87 Difference]: Start difference. First operand 486 states and 1520 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:46,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:46,790 INFO L93 Difference]: Finished difference Result 970 states and 2980 transitions. [2021-06-12 20:05:46,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:05:46,790 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:46,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:46,792 INFO L225 Difference]: With dead ends: 970 [2021-06-12 20:05:46,792 INFO L226 Difference]: Without dead ends: 949 [2021-06-12 20:05:46,792 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 380.2ms TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:05:46,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-06-12 20:05:46,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 484. [2021-06-12 20:05:46,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.1366459627329193) internal successors, (1515), 483 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:46,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1515 transitions. [2021-06-12 20:05:46,798 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1515 transitions. Word has length 21 [2021-06-12 20:05:46,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:46,798 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1515 transitions. [2021-06-12 20:05:46,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:46,799 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1515 transitions. [2021-06-12 20:05:46,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:46,799 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:46,799 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:46,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 817 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4585 [2021-06-12 20:05:47,000 INFO L430 AbstractCegarLoop]: === Iteration 829 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:47,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:47,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1200401433, now seen corresponding path program 817 times [2021-06-12 20:05:47,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:47,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816300604] [2021-06-12 20:05:47,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:47,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:47,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:47,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816300604] [2021-06-12 20:05:47,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816300604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:47,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800561367] [2021-06-12 20:05:47,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 818 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 818 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:47,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:47,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:47,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:47,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:47,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:47,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:47,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:47,164 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:47,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:47,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:05:47,170 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:20 [2021-06-12 20:05:47,231 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_2]} [2021-06-12 20:05:47,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:47,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:47,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:47,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:47,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:47,240 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:47,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:47,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:47,245 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:7 [2021-06-12 20:05:47,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:47,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800561367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:47,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:47,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:47,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781328334] [2021-06-12 20:05:47,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:47,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:47,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:47,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:47,274 INFO L87 Difference]: Start difference. First operand 484 states and 1515 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:47,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:47,919 INFO L93 Difference]: Finished difference Result 1050 states and 3197 transitions. [2021-06-12 20:05:47,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:05:47,919 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:47,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:47,921 INFO L225 Difference]: With dead ends: 1050 [2021-06-12 20:05:47,921 INFO L226 Difference]: Without dead ends: 1029 [2021-06-12 20:05:47,921 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 498.7ms TimeCoverageRelationStatistics Valid=223, Invalid=833, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:05:47,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-06-12 20:05:47,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 468. [2021-06-12 20:05:47,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.145610278372591) internal successors, (1469), 467 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:47,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1469 transitions. [2021-06-12 20:05:47,928 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1469 transitions. Word has length 21 [2021-06-12 20:05:47,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:47,928 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1469 transitions. [2021-06-12 20:05:47,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:47,928 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1469 transitions. [2021-06-12 20:05:47,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:47,929 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:47,929 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:48,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 818 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4592 [2021-06-12 20:05:48,136 INFO L430 AbstractCegarLoop]: === Iteration 830 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:48,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:48,136 INFO L82 PathProgramCache]: Analyzing trace with hash -858665853, now seen corresponding path program 818 times [2021-06-12 20:05:48,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:48,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955782461] [2021-06-12 20:05:48,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:48,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:48,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:48,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:48,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955782461] [2021-06-12 20:05:48,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955782461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:48,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233344490] [2021-06-12 20:05:48,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 819 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 819 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:48,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:48,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:48,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:48,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:48,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:48,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:48,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:48,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:48,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:05:48,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:48,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:48,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:48,329 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:05:48,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:48,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:05:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:48,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233344490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:48,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:48,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:05:48,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163210506] [2021-06-12 20:05:48,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:48,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:48,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:48,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:48,338 INFO L87 Difference]: Start difference. First operand 468 states and 1469 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:48,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:48,460 INFO L93 Difference]: Finished difference Result 635 states and 1963 transitions. [2021-06-12 20:05:48,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:48,460 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:48,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:48,461 INFO L225 Difference]: With dead ends: 635 [2021-06-12 20:05:48,461 INFO L226 Difference]: Without dead ends: 613 [2021-06-12 20:05:48,461 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:05:48,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-12 20:05:48,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 474. [2021-06-12 20:05:48,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.1501057082452433) internal successors, (1490), 473 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:48,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1490 transitions. [2021-06-12 20:05:48,466 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1490 transitions. Word has length 21 [2021-06-12 20:05:48,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:48,466 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1490 transitions. [2021-06-12 20:05:48,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:48,466 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1490 transitions. [2021-06-12 20:05:48,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:48,467 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:48,467 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:48,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 819 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4599 [2021-06-12 20:05:48,667 INFO L430 AbstractCegarLoop]: === Iteration 831 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:48,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:48,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1360457189, now seen corresponding path program 819 times [2021-06-12 20:05:48,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:48,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823995415] [2021-06-12 20:05:48,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:48,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:48,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:48,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823995415] [2021-06-12 20:05:48,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823995415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:48,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162859431] [2021-06-12 20:05:48,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 820 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 820 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:48,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:05:48,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:48,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:48,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:48,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:48,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:48,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:48,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:48,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:48,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 20:05:48,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:48,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:48,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:48,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:48,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:48,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:05:48,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:48,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:48,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:48,937 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 20:05:48,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:48,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162859431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:48,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:48,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:05:48,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124411442] [2021-06-12 20:05:48,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:48,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:48,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:48,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:48,956 INFO L87 Difference]: Start difference. First operand 474 states and 1490 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:49,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:49,151 INFO L93 Difference]: Finished difference Result 626 states and 1939 transitions. [2021-06-12 20:05:49,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:49,151 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:49,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:49,152 INFO L225 Difference]: With dead ends: 626 [2021-06-12 20:05:49,152 INFO L226 Difference]: Without dead ends: 604 [2021-06-12 20:05:49,152 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 177.2ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:05:49,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-06-12 20:05:49,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 471. [2021-06-12 20:05:49,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.1446808510638298) internal successors, (1478), 470 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:49,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1478 transitions. [2021-06-12 20:05:49,157 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1478 transitions. Word has length 21 [2021-06-12 20:05:49,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:49,157 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1478 transitions. [2021-06-12 20:05:49,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:49,158 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1478 transitions. [2021-06-12 20:05:49,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:49,158 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:49,158 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:49,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4601,820 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:49,359 INFO L430 AbstractCegarLoop]: === Iteration 832 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:49,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:49,359 INFO L82 PathProgramCache]: Analyzing trace with hash 827725987, now seen corresponding path program 820 times [2021-06-12 20:05:49,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:49,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976145996] [2021-06-12 20:05:49,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:49,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:49,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:49,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976145996] [2021-06-12 20:05:49,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976145996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:49,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022826310] [2021-06-12 20:05:49,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 821 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 821 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:49,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:49,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:49,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:49,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:49,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:49,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:49,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:49,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:49,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-06-12 20:05:49,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:49,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:49,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:49,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:49,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:49,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:05:49,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:49,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:49,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:49,578 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:12 [2021-06-12 20:05:49,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:49,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022826310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:49,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:49,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:05:49,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381614808] [2021-06-12 20:05:49,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:49,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:49,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:49,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:49,592 INFO L87 Difference]: Start difference. First operand 471 states and 1478 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:49,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:49,722 INFO L93 Difference]: Finished difference Result 629 states and 1945 transitions. [2021-06-12 20:05:49,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:49,722 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:49,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:49,723 INFO L225 Difference]: With dead ends: 629 [2021-06-12 20:05:49,723 INFO L226 Difference]: Without dead ends: 607 [2021-06-12 20:05:49,723 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:49,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-12 20:05:49,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 468. [2021-06-12 20:05:49,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.145610278372591) internal successors, (1469), 467 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:49,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1469 transitions. [2021-06-12 20:05:49,728 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1469 transitions. Word has length 21 [2021-06-12 20:05:49,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:49,728 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1469 transitions. [2021-06-12 20:05:49,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:49,728 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1469 transitions. [2021-06-12 20:05:49,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:49,729 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:49,729 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:49,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 821 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4604 [2021-06-12 20:05:49,929 INFO L430 AbstractCegarLoop]: === Iteration 833 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:49,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:49,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1734488267, now seen corresponding path program 821 times [2021-06-12 20:05:49,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:49,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987575656] [2021-06-12 20:05:49,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:49,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:50,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:50,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:50,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987575656] [2021-06-12 20:05:50,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987575656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:50,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131111774] [2021-06-12 20:05:50,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 822 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 822 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:50,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:50,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:50,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:50,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:50,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:50,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:50,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:50,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:50,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:50,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:50,090 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:05:50,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:50,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:50,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:50,147 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:05:50,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:50,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:05:50,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:50,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131111774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:50,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:50,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:05:50,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461342725] [2021-06-12 20:05:50,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:50,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:50,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:50,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:50,156 INFO L87 Difference]: Start difference. First operand 468 states and 1469 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:50,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:50,334 INFO L93 Difference]: Finished difference Result 646 states and 1994 transitions. [2021-06-12 20:05:50,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:50,335 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:50,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:50,336 INFO L225 Difference]: With dead ends: 646 [2021-06-12 20:05:50,336 INFO L226 Difference]: Without dead ends: 624 [2021-06-12 20:05:50,336 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:05:50,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-06-12 20:05:50,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 474. [2021-06-12 20:05:50,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.1479915433403804) internal successors, (1489), 473 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:50,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1489 transitions. [2021-06-12 20:05:50,341 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1489 transitions. Word has length 21 [2021-06-12 20:05:50,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:50,341 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1489 transitions. [2021-06-12 20:05:50,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:50,341 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1489 transitions. [2021-06-12 20:05:50,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:50,342 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:50,342 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:50,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 822 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4606 [2021-06-12 20:05:50,542 INFO L430 AbstractCegarLoop]: === Iteration 834 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:50,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:50,542 INFO L82 PathProgramCache]: Analyzing trace with hash 2058687693, now seen corresponding path program 822 times [2021-06-12 20:05:50,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:50,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466157834] [2021-06-12 20:05:50,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:50,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:50,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:50,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466157834] [2021-06-12 20:05:50,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466157834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:50,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364283812] [2021-06-12 20:05:50,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 823 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 823 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:50,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:05:50,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:50,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:50,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:50,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:50,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:50,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:50,695 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:50,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:50,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:50,704 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:05:50,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:50,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:50,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:50,746 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:05:50,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:50,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:05:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:50,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364283812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:50,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:50,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:05:50,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662911510] [2021-06-12 20:05:50,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:05:50,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:50,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:05:50,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:50,760 INFO L87 Difference]: Start difference. First operand 474 states and 1489 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:50,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:50,909 INFO L93 Difference]: Finished difference Result 637 states and 1970 transitions. [2021-06-12 20:05:50,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:50,910 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:50,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:50,910 INFO L225 Difference]: With dead ends: 637 [2021-06-12 20:05:50,911 INFO L226 Difference]: Without dead ends: 615 [2021-06-12 20:05:50,911 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 168.5ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:05:50,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-06-12 20:05:50,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 471. [2021-06-12 20:05:50,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.1425531914893616) internal successors, (1477), 470 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:50,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1477 transitions. [2021-06-12 20:05:50,916 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1477 transitions. Word has length 21 [2021-06-12 20:05:50,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:50,916 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1477 transitions. [2021-06-12 20:05:50,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:50,916 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1477 transitions. [2021-06-12 20:05:50,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:50,916 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:50,916 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:51,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4609,823 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:51,117 INFO L430 AbstractCegarLoop]: === Iteration 835 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:51,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:51,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1420900691, now seen corresponding path program 823 times [2021-06-12 20:05:51,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:51,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217140604] [2021-06-12 20:05:51,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:51,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:51,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217140604] [2021-06-12 20:05:51,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217140604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:51,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070551142] [2021-06-12 20:05:51,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 824 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 824 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:51,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:51,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:51,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:51,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:51,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:51,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:51,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:51,290 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:51,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:51,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:51,302 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-12 20:05:51,347 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 20:05:51,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:51,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:51,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:51,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:51,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:51,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:51,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:51,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:51,364 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:35, output treesize:10 [2021-06-12 20:05:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:51,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070551142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:51,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:51,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:51,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614473096] [2021-06-12 20:05:51,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:51,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:51,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:51,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:51,406 INFO L87 Difference]: Start difference. First operand 471 states and 1477 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:51,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:51,752 INFO L93 Difference]: Finished difference Result 707 states and 2166 transitions. [2021-06-12 20:05:51,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:05:51,753 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:51,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:51,754 INFO L225 Difference]: With dead ends: 707 [2021-06-12 20:05:51,754 INFO L226 Difference]: Without dead ends: 688 [2021-06-12 20:05:51,754 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 286.4ms TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:05:51,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-06-12 20:05:51,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 471. [2021-06-12 20:05:51,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.129787234042553) internal successors, (1471), 470 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:51,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1471 transitions. [2021-06-12 20:05:51,759 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1471 transitions. Word has length 21 [2021-06-12 20:05:51,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:51,759 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1471 transitions. [2021-06-12 20:05:51,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:51,759 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1471 transitions. [2021-06-12 20:05:51,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:51,760 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:51,760 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:51,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4612,824 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:51,960 INFO L430 AbstractCegarLoop]: === Iteration 836 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:51,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:51,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1145104717, now seen corresponding path program 824 times [2021-06-12 20:05:51,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:51,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229590880] [2021-06-12 20:05:51,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:52,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:52,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229590880] [2021-06-12 20:05:52,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229590880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:52,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853638823] [2021-06-12 20:05:52,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 825 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 825 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:52,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:52,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:52,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:52,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:52,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:52,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:52,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:52,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:52,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:52,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:52,115 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:05:52,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:52,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:52,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:52,173 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:05:52,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:52,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:52,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:52,181 INFO L518 ElimStorePlain]: Eliminatee v_prenex_244 vanished before elimination [2021-06-12 20:05:52,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:52,182 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:15 [2021-06-12 20:05:52,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:52,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853638823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:52,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:52,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:05:52,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695564269] [2021-06-12 20:05:52,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:05:52,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:52,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:05:52,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:52,199 INFO L87 Difference]: Start difference. First operand 471 states and 1471 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:52,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:52,368 INFO L93 Difference]: Finished difference Result 653 states and 2014 transitions. [2021-06-12 20:05:52,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:52,368 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:52,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:52,369 INFO L225 Difference]: With dead ends: 653 [2021-06-12 20:05:52,369 INFO L226 Difference]: Without dead ends: 624 [2021-06-12 20:05:52,370 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 153.7ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:52,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-06-12 20:05:52,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 471. [2021-06-12 20:05:52,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.129787234042553) internal successors, (1471), 470 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:52,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1471 transitions. [2021-06-12 20:05:52,375 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1471 transitions. Word has length 21 [2021-06-12 20:05:52,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:52,375 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1471 transitions. [2021-06-12 20:05:52,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:52,375 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1471 transitions. [2021-06-12 20:05:52,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:52,375 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:52,375 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:52,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4615,825 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:52,576 INFO L430 AbstractCegarLoop]: === Iteration 837 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:52,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:52,576 INFO L82 PathProgramCache]: Analyzing trace with hash 50405799, now seen corresponding path program 825 times [2021-06-12 20:05:52,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:52,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619404687] [2021-06-12 20:05:52,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:52,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:52,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619404687] [2021-06-12 20:05:52,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619404687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:52,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554889571] [2021-06-12 20:05:52,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 826 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 826 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:52,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:05:52,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:52,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:52,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:52,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:52,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:52,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:52,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:52,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:52,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 20:05:52,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:05:52,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:52,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:52,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:52,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:52,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:52,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:52,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:52,918 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:52,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:52,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:52,933 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:63, output treesize:13 [2021-06-12 20:05:52,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:52,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554889571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:52,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:52,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:52,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464453120] [2021-06-12 20:05:52,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:52,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:52,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:52,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:52,984 INFO L87 Difference]: Start difference. First operand 471 states and 1471 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:53,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:53,952 INFO L93 Difference]: Finished difference Result 1063 states and 3157 transitions. [2021-06-12 20:05:53,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:05:53,952 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:53,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:53,954 INFO L225 Difference]: With dead ends: 1063 [2021-06-12 20:05:53,954 INFO L226 Difference]: Without dead ends: 1009 [2021-06-12 20:05:53,954 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 798.3ms TimeCoverageRelationStatistics Valid=250, Invalid=1310, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:05:53,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-06-12 20:05:53,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 472. [2021-06-12 20:05:53,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.150743099787686) internal successors, (1484), 471 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:53,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1484 transitions. [2021-06-12 20:05:53,960 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1484 transitions. Word has length 21 [2021-06-12 20:05:53,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:53,960 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1484 transitions. [2021-06-12 20:05:53,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:53,960 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1484 transitions. [2021-06-12 20:05:53,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:53,961 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:53,961 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:54,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4623,826 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:54,161 INFO L430 AbstractCegarLoop]: === Iteration 838 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:54,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:54,162 INFO L82 PathProgramCache]: Analyzing trace with hash -573879965, now seen corresponding path program 826 times [2021-06-12 20:05:54,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:54,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084694849] [2021-06-12 20:05:54,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:54,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:54,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:54,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084694849] [2021-06-12 20:05:54,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084694849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:54,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343853441] [2021-06-12 20:05:54,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 827 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 827 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:54,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:54,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:54,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:54,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:54,353 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[v_prenex_245]} [2021-06-12 20:05:54,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:54,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:54,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:54,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:54,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:54,373 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:54,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:54,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:05:54,392 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:55, output treesize:39 [2021-06-12 20:05:54,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:54,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:54,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:54,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:54,439 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:54,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:54,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:54,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:05:54,458 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:54,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:54,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:54,475 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:67, output treesize:21 [2021-06-12 20:05:54,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:54,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343853441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:54,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:54,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:05:54,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71768312] [2021-06-12 20:05:54,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:05:54,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:54,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:05:54,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:54,498 INFO L87 Difference]: Start difference. First operand 472 states and 1484 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:54,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:54,684 INFO L93 Difference]: Finished difference Result 661 states and 2044 transitions. [2021-06-12 20:05:54,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:54,685 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:54,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:54,686 INFO L225 Difference]: With dead ends: 661 [2021-06-12 20:05:54,686 INFO L226 Difference]: Without dead ends: 632 [2021-06-12 20:05:54,686 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 196.5ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:54,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-06-12 20:05:54,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 472. [2021-06-12 20:05:54,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.150743099787686) internal successors, (1484), 471 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:54,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1484 transitions. [2021-06-12 20:05:54,691 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1484 transitions. Word has length 21 [2021-06-12 20:05:54,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:54,691 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1484 transitions. [2021-06-12 20:05:54,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:54,691 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1484 transitions. [2021-06-12 20:05:54,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:54,692 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:54,692 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:54,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4632,827 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:54,892 INFO L430 AbstractCegarLoop]: === Iteration 839 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:54,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:54,892 INFO L82 PathProgramCache]: Analyzing trace with hash -276613555, now seen corresponding path program 827 times [2021-06-12 20:05:54,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:54,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117513359] [2021-06-12 20:05:54,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:54,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:54,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117513359] [2021-06-12 20:05:54,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117513359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:54,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114102037] [2021-06-12 20:05:54,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 828 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 828 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:55,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:55,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:55,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:55,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:55,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:55,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:55,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:55,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:55,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:55,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:55,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:55,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:55,078 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-12 20:05:55,109 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 20:05:55,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:55,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:55,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:55,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:55,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:55,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:55,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:55,133 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:55,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:55,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:55,149 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:19 [2021-06-12 20:05:55,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:55,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114102037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:55,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:55,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:55,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700202353] [2021-06-12 20:05:55,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:55,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:55,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:55,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:55,226 INFO L87 Difference]: Start difference. First operand 472 states and 1484 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:55,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:55,653 INFO L93 Difference]: Finished difference Result 799 states and 2464 transitions. [2021-06-12 20:05:55,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:05:55,653 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:55,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:55,654 INFO L225 Difference]: With dead ends: 799 [2021-06-12 20:05:55,654 INFO L226 Difference]: Without dead ends: 776 [2021-06-12 20:05:55,654 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 369.5ms TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:05:55,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2021-06-12 20:05:55,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 470. [2021-06-12 20:05:55,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.1535181236673773) internal successors, (1479), 469 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:55,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1479 transitions. [2021-06-12 20:05:55,660 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1479 transitions. Word has length 21 [2021-06-12 20:05:55,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:55,660 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1479 transitions. [2021-06-12 20:05:55,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:55,660 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1479 transitions. [2021-06-12 20:05:55,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:55,661 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:55,661 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:55,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 828 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4639 [2021-06-12 20:05:55,861 INFO L430 AbstractCegarLoop]: === Iteration 840 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:55,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:55,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1565208177, now seen corresponding path program 828 times [2021-06-12 20:05:55,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:55,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853402978] [2021-06-12 20:05:55,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:55,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:55,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:55,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853402978] [2021-06-12 20:05:55,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853402978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:55,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773876189] [2021-06-12 20:05:55,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 829 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 829 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:55,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:05:55,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:55,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:55,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:56,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:56,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:56,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:56,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:56,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:56,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 20:05:56,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:56,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:56,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:56,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:56,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:05:56,107 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:56,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:56,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:56,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:05:56,128 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:56,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:56,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:56,145 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:19 [2021-06-12 20:05:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:56,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773876189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:56,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:56,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:56,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214738682] [2021-06-12 20:05:56,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:56,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:56,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:56,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:56,223 INFO L87 Difference]: Start difference. First operand 470 states and 1479 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:57,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:57,249 INFO L93 Difference]: Finished difference Result 1025 states and 3077 transitions. [2021-06-12 20:05:57,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:05:57,249 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:57,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:57,250 INFO L225 Difference]: With dead ends: 1025 [2021-06-12 20:05:57,250 INFO L226 Difference]: Without dead ends: 998 [2021-06-12 20:05:57,250 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 734.3ms TimeCoverageRelationStatistics Valid=232, Invalid=1250, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:05:57,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-06-12 20:05:57,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 465. [2021-06-12 20:05:57,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.1314655172413794) internal successors, (1453), 464 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:57,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1453 transitions. [2021-06-12 20:05:57,256 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1453 transitions. Word has length 21 [2021-06-12 20:05:57,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:57,256 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1453 transitions. [2021-06-12 20:05:57,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:57,257 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1453 transitions. [2021-06-12 20:05:57,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:57,257 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:57,257 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:57,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4647,829 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:57,458 INFO L430 AbstractCegarLoop]: === Iteration 841 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:57,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:57,458 INFO L82 PathProgramCache]: Analyzing trace with hash 822507213, now seen corresponding path program 829 times [2021-06-12 20:05:57,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:57,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710068901] [2021-06-12 20:05:57,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:57,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:57,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:57,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710068901] [2021-06-12 20:05:57,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710068901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:57,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418988186] [2021-06-12 20:05:57,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 830 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 830 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:57,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:57,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:57,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:57,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:57,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:57,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:57,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:57,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:57,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:57,607 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:05:57,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:57,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:57,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:57,646 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:05:57,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:57,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:05:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:57,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418988186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:57,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:57,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:05:57,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610651520] [2021-06-12 20:05:57,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:05:57,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:57,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:05:57,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:57,661 INFO L87 Difference]: Start difference. First operand 465 states and 1453 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:57,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:57,813 INFO L93 Difference]: Finished difference Result 632 states and 1950 transitions. [2021-06-12 20:05:57,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:57,813 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:57,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:57,814 INFO L225 Difference]: With dead ends: 632 [2021-06-12 20:05:57,814 INFO L226 Difference]: Without dead ends: 610 [2021-06-12 20:05:57,814 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:57,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-06-12 20:05:57,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 468. [2021-06-12 20:05:57,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.137044967880086) internal successors, (1465), 467 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:57,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1465 transitions. [2021-06-12 20:05:57,819 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1465 transitions. Word has length 21 [2021-06-12 20:05:57,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:57,819 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1465 transitions. [2021-06-12 20:05:57,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:57,819 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1465 transitions. [2021-06-12 20:05:57,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:57,820 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:57,820 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:58,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4659,830 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:58,021 INFO L430 AbstractCegarLoop]: === Iteration 842 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:58,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:58,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1447831331, now seen corresponding path program 830 times [2021-06-12 20:05:58,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:58,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624263447] [2021-06-12 20:05:58,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:58,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:58,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624263447] [2021-06-12 20:05:58,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624263447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:58,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332593928] [2021-06-12 20:05:58,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 831 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 831 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:58,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:58,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:58,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:58,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:58,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:58,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:58,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:58,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:58,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 20:05:58,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:05:58,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:58,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:58,192 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:58,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:58,198 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:05:58,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:58,198 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:05:58,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:58,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332593928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:58,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:58,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:05:58,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579606411] [2021-06-12 20:05:58,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:05:58,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:58,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:05:58,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:58,217 INFO L87 Difference]: Start difference. First operand 468 states and 1465 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:58,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:58,356 INFO L93 Difference]: Finished difference Result 617 states and 1891 transitions. [2021-06-12 20:05:58,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:58,356 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:58,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:58,357 INFO L225 Difference]: With dead ends: 617 [2021-06-12 20:05:58,357 INFO L226 Difference]: Without dead ends: 590 [2021-06-12 20:05:58,357 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:58,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-06-12 20:05:58,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 468. [2021-06-12 20:05:58,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.132762312633833) internal successors, (1463), 467 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:58,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1463 transitions. [2021-06-12 20:05:58,362 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1463 transitions. Word has length 21 [2021-06-12 20:05:58,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:58,362 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1463 transitions. [2021-06-12 20:05:58,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:58,362 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1463 transitions. [2021-06-12 20:05:58,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:58,363 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:58,363 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:58,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 831 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4662 [2021-06-12 20:05:58,563 INFO L430 AbstractCegarLoop]: === Iteration 843 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:58,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:58,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1163568647, now seen corresponding path program 831 times [2021-06-12 20:05:58,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:58,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669574363] [2021-06-12 20:05:58,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:58,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:58,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:58,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:58,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669574363] [2021-06-12 20:05:58,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669574363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:58,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496056093] [2021-06-12 20:05:58,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 832 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 832 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:58,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:05:58,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:58,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:58,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:58,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:58,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:58,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:58,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:58,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:58,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:58,714 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:05:58,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:58,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:58,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:58,776 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:05:58,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:58,778 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:58,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:58,784 INFO L518 ElimStorePlain]: Eliminatee v_prenex_247 vanished before elimination [2021-06-12 20:05:58,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:58,785 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:13 [2021-06-12 20:05:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:58,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496056093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:58,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:58,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:05:58,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804693249] [2021-06-12 20:05:58,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:58,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:58,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:58,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:58,814 INFO L87 Difference]: Start difference. First operand 468 states and 1463 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:59,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:59,039 INFO L93 Difference]: Finished difference Result 670 states and 2038 transitions. [2021-06-12 20:05:59,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:05:59,040 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:59,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:59,041 INFO L225 Difference]: With dead ends: 670 [2021-06-12 20:05:59,041 INFO L226 Difference]: Without dead ends: 643 [2021-06-12 20:05:59,041 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 160.7ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:05:59,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-06-12 20:05:59,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 481. [2021-06-12 20:05:59,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.129166666666667) internal successors, (1502), 480 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:59,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1502 transitions. [2021-06-12 20:05:59,046 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1502 transitions. Word has length 21 [2021-06-12 20:05:59,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:59,046 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1502 transitions. [2021-06-12 20:05:59,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:59,046 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1502 transitions. [2021-06-12 20:05:59,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:59,046 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:59,046 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:59,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4665,832 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:59,247 INFO L430 AbstractCegarLoop]: === Iteration 844 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:59,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:59,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1445006809, now seen corresponding path program 832 times [2021-06-12 20:05:59,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:59,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424068096] [2021-06-12 20:05:59,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:59,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:59,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:59,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424068096] [2021-06-12 20:05:59,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424068096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:59,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410522555] [2021-06-12 20:05:59,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 833 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 833 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:59,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:59,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:59,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:59,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:59,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:05:59,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:59,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:59,385 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:59,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:59,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:59,395 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:05:59,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:59,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:59,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:59,453 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:05:59,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:59,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:05:59,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:59,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410522555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:59,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:59,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:05:59,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969618825] [2021-06-12 20:05:59,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:59,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:59,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:59,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:59,465 INFO L87 Difference]: Start difference. First operand 481 states and 1502 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:59,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:59,690 INFO L93 Difference]: Finished difference Result 599 states and 1831 transitions. [2021-06-12 20:05:59,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:05:59,690 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:05:59,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:59,691 INFO L225 Difference]: With dead ends: 599 [2021-06-12 20:05:59,691 INFO L226 Difference]: Without dead ends: 578 [2021-06-12 20:05:59,691 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:05:59,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-12 20:05:59,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 471. [2021-06-12 20:05:59,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.1382978723404253) internal successors, (1475), 470 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:59,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1475 transitions. [2021-06-12 20:05:59,697 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1475 transitions. Word has length 21 [2021-06-12 20:05:59,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:59,697 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1475 transitions. [2021-06-12 20:05:59,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:59,697 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1475 transitions. [2021-06-12 20:05:59,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:05:59,697 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:59,697 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:59,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4676,833 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:59,898 INFO L430 AbstractCegarLoop]: === Iteration 845 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:59,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:59,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1422502437, now seen corresponding path program 833 times [2021-06-12 20:05:59,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:59,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9615508] [2021-06-12 20:05:59,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:59,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:59,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:59,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9615508] [2021-06-12 20:05:59,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9615508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:59,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983184804] [2021-06-12 20:05:59,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 834 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 834 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:00,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:06:00,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:00,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:00,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:00,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:00,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:00,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:00,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:00,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:00,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:00,079 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:06:00,113 INFO L446 ElimStorePlain]: Different costs {0=[o_0, o_2], 1=[v_prenex_248, v_prenex_249]} [2021-06-12 20:06:00,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:00,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:00,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:00,128 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:06:00,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:00,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:00,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:00,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:00,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:00,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:06:00,144 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:00,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:00,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:00,155 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:51, output treesize:21 [2021-06-12 20:06:00,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:00,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983184804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:00,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:00,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:06:00,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943821135] [2021-06-12 20:06:00,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:06:00,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:00,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:06:00,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:06:00,178 INFO L87 Difference]: Start difference. First operand 471 states and 1475 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:00,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:00,327 INFO L93 Difference]: Finished difference Result 650 states and 2009 transitions. [2021-06-12 20:06:00,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:00,327 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:00,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:00,328 INFO L225 Difference]: With dead ends: 650 [2021-06-12 20:06:00,328 INFO L226 Difference]: Without dead ends: 621 [2021-06-12 20:06:00,328 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 128.3ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:06:00,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-12 20:06:00,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 471. [2021-06-12 20:06:00,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.1382978723404253) internal successors, (1475), 470 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:00,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1475 transitions. [2021-06-12 20:06:00,333 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1475 transitions. Word has length 21 [2021-06-12 20:06:00,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:00,334 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1475 transitions. [2021-06-12 20:06:00,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:00,334 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1475 transitions. [2021-06-12 20:06:00,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:00,334 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:00,334 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:00,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 834 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4682 [2021-06-12 20:06:00,535 INFO L430 AbstractCegarLoop]: === Iteration 846 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:00,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:00,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1125236027, now seen corresponding path program 834 times [2021-06-12 20:06:00,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:00,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257616217] [2021-06-12 20:06:00,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:00,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:00,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:00,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257616217] [2021-06-12 20:06:00,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257616217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:00,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098400832] [2021-06-12 20:06:00,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 835 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 835 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:00,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:06:00,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:00,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:00,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:00,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:00,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:00,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:00,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:00,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 20:06:00,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:00,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:00,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:06:00,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:00,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:00,715 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:06:00,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:00,716 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:45, output treesize:19 [2021-06-12 20:06:00,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:00,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098400832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:00,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:00,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:06:00,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597132163] [2021-06-12 20:06:00,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:06:00,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:00,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:06:00,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:06:00,759 INFO L87 Difference]: Start difference. First operand 471 states and 1475 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:00,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:00,916 INFO L93 Difference]: Finished difference Result 607 states and 1866 transitions. [2021-06-12 20:06:00,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:00,917 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:00,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:00,918 INFO L225 Difference]: With dead ends: 607 [2021-06-12 20:06:00,918 INFO L226 Difference]: Without dead ends: 584 [2021-06-12 20:06:00,918 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:00,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-06-12 20:06:00,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 470. [2021-06-12 20:06:00,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.1471215351812365) internal successors, (1476), 469 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:00,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1476 transitions. [2021-06-12 20:06:00,922 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1476 transitions. Word has length 21 [2021-06-12 20:06:00,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:00,922 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1476 transitions. [2021-06-12 20:06:00,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:00,922 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1476 transitions. [2021-06-12 20:06:00,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:00,923 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:00,923 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:01,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4688,835 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:01,123 INFO L430 AbstractCegarLoop]: === Iteration 847 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:01,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:01,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1409498711, now seen corresponding path program 835 times [2021-06-12 20:06:01,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:01,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475119368] [2021-06-12 20:06:01,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:01,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:01,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475119368] [2021-06-12 20:06:01,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475119368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:01,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886893688] [2021-06-12 20:06:01,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 836 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 836 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:01,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:01,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:01,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:01,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:01,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:01,301 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:01,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:01,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:01,317 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:06:01,353 INFO L446 ElimStorePlain]: Different costs {0=[o_0, o_2], 1=[v_prenex_250, v_prenex_251]} [2021-06-12 20:06:01,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:01,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:01,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:01,369 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:06:01,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:01,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:01,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:01,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:01,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:01,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:01,386 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:01,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:01,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:01,397 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:51, output treesize:19 [2021-06-12 20:06:01,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:01,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886893688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:01,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:01,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:01,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651669234] [2021-06-12 20:06:01,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:01,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:01,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:01,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:01,480 INFO L87 Difference]: Start difference. First operand 470 states and 1476 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:02,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:02,229 INFO L93 Difference]: Finished difference Result 951 states and 2881 transitions. [2021-06-12 20:06:02,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:06:02,229 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:02,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:02,231 INFO L225 Difference]: With dead ends: 951 [2021-06-12 20:06:02,231 INFO L226 Difference]: Without dead ends: 924 [2021-06-12 20:06:02,231 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 559.5ms TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:06:02,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-06-12 20:06:02,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 481. [2021-06-12 20:06:02,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.15) internal successors, (1512), 480 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:02,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1512 transitions. [2021-06-12 20:06:02,237 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1512 transitions. Word has length 21 [2021-06-12 20:06:02,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:02,237 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1512 transitions. [2021-06-12 20:06:02,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:02,237 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1512 transitions. [2021-06-12 20:06:02,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:02,238 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:02,238 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:02,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 836 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4694 [2021-06-12 20:06:02,438 INFO L430 AbstractCegarLoop]: === Iteration 848 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:02,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:02,438 INFO L82 PathProgramCache]: Analyzing trace with hash 666191079, now seen corresponding path program 836 times [2021-06-12 20:06:02,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:02,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10165571] [2021-06-12 20:06:02,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:02,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:02,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10165571] [2021-06-12 20:06:02,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10165571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:02,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085696581] [2021-06-12 20:06:02,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 837 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 837 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:02,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:06:02,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:02,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:02,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:02,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:02,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:02,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:02,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:02,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:02,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:02,634 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:06:02,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:02,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:02,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:02,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:02,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:02,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:02,697 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:02,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:02,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:02,704 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:10 [2021-06-12 20:06:02,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:02,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085696581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:02,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:02,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:02,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914094905] [2021-06-12 20:06:02,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:02,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:02,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:02,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:02,750 INFO L87 Difference]: Start difference. First operand 481 states and 1512 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:03,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:03,344 INFO L93 Difference]: Finished difference Result 829 states and 2541 transitions. [2021-06-12 20:06:03,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:06:03,344 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:03,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:03,345 INFO L225 Difference]: With dead ends: 829 [2021-06-12 20:06:03,346 INFO L226 Difference]: Without dead ends: 808 [2021-06-12 20:06:03,346 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 425.6ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:06:03,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-06-12 20:06:03,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 464. [2021-06-12 20:06:03,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.1295896328293735) internal successors, (1449), 463 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:03,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1449 transitions. [2021-06-12 20:06:03,351 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1449 transitions. Word has length 21 [2021-06-12 20:06:03,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:03,351 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1449 transitions. [2021-06-12 20:06:03,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:03,351 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1449 transitions. [2021-06-12 20:06:03,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:03,352 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:03,352 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:03,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 837 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4707 [2021-06-12 20:06:03,552 INFO L430 AbstractCegarLoop]: === Iteration 849 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:03,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:03,553 INFO L82 PathProgramCache]: Analyzing trace with hash 170372643, now seen corresponding path program 837 times [2021-06-12 20:06:03,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:03,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929753472] [2021-06-12 20:06:03,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:03,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:03,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:03,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929753472] [2021-06-12 20:06:03,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929753472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:03,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074814275] [2021-06-12 20:06:03,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 838 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 838 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:03,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:06:03,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:03,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:03,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:03,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:03,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:03,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:03,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:03,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:03,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:03,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:03,701 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:29 [2021-06-12 20:06:03,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:03,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:03,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:03,725 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:06:03,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:03,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:06:03,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:03,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074814275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:03,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:03,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:06:03,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580536860] [2021-06-12 20:06:03,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:06:03,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:03,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:06:03,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:06:03,739 INFO L87 Difference]: Start difference. First operand 464 states and 1449 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:03,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:03,888 INFO L93 Difference]: Finished difference Result 824 states and 2528 transitions. [2021-06-12 20:06:03,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:03,889 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:03,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:03,890 INFO L225 Difference]: With dead ends: 824 [2021-06-12 20:06:03,890 INFO L226 Difference]: Without dead ends: 802 [2021-06-12 20:06:03,890 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:06:03,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-06-12 20:06:03,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 467. [2021-06-12 20:06:03,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.1351931330472103) internal successors, (1461), 466 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:03,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1461 transitions. [2021-06-12 20:06:03,895 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1461 transitions. Word has length 21 [2021-06-12 20:06:03,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:03,896 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1461 transitions. [2021-06-12 20:06:03,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:03,896 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1461 transitions. [2021-06-12 20:06:03,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:03,896 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:03,896 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:04,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 838 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4712 [2021-06-12 20:06:04,097 INFO L430 AbstractCegarLoop]: === Iteration 850 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:04,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:04,097 INFO L82 PathProgramCache]: Analyzing trace with hash 449517039, now seen corresponding path program 838 times [2021-06-12 20:06:04,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:04,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993796631] [2021-06-12 20:06:04,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:04,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:04,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:04,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993796631] [2021-06-12 20:06:04,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993796631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:04,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974909425] [2021-06-12 20:06:04,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 839 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 839 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:04,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:06:04,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:04,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:04,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:04,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:04,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:04,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:04,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:04,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 20:06:04,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:06:04,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:04,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:04,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:04,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:04,294 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:06:04,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:04,294 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:06:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:04,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974909425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:04,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:04,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:04,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000658533] [2021-06-12 20:06:04,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:04,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:04,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:04,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:04,339 INFO L87 Difference]: Start difference. First operand 467 states and 1461 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:04,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:04,692 INFO L93 Difference]: Finished difference Result 861 states and 2621 transitions. [2021-06-12 20:06:04,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:06:04,693 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:04,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:04,694 INFO L225 Difference]: With dead ends: 861 [2021-06-12 20:06:04,694 INFO L226 Difference]: Without dead ends: 830 [2021-06-12 20:06:04,694 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 294.2ms TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:06:04,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-12 20:06:04,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 470. [2021-06-12 20:06:04,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.1321961620469083) internal successors, (1469), 469 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:04,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1469 transitions. [2021-06-12 20:06:04,700 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1469 transitions. Word has length 21 [2021-06-12 20:06:04,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:04,700 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1469 transitions. [2021-06-12 20:06:04,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:04,700 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1469 transitions. [2021-06-12 20:06:04,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:04,701 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:04,701 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:04,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4716,839 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:04,901 INFO L430 AbstractCegarLoop]: === Iteration 851 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:04,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:04,902 INFO L82 PathProgramCache]: Analyzing trace with hash 165254355, now seen corresponding path program 839 times [2021-06-12 20:06:04,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:04,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122874738] [2021-06-12 20:06:04,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:04,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:04,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:04,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:04,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122874738] [2021-06-12 20:06:04,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122874738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:04,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137166328] [2021-06-12 20:06:04,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 840 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 840 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:05,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:06:05,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:05,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:05,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:05,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:05,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:05,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:05,047 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:05,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:05,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:05,054 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:06:05,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:05,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:05,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:05,107 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:05,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:05,113 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:06:05,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:05,113 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:13 [2021-06-12 20:06:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:05,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137166328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:05,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:05,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:05,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263118749] [2021-06-12 20:06:05,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:05,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:05,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:05,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:05,162 INFO L87 Difference]: Start difference. First operand 470 states and 1469 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:05,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:05,785 INFO L93 Difference]: Finished difference Result 1023 states and 3104 transitions. [2021-06-12 20:06:05,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:06:05,785 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:05,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:05,787 INFO L225 Difference]: With dead ends: 1023 [2021-06-12 20:06:05,787 INFO L226 Difference]: Without dead ends: 996 [2021-06-12 20:06:05,787 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 506.2ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:06:05,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-06-12 20:06:05,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 491. [2021-06-12 20:06:05,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.1551020408163266) internal successors, (1546), 490 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:05,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1546 transitions. [2021-06-12 20:06:05,793 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1546 transitions. Word has length 21 [2021-06-12 20:06:05,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:05,793 INFO L482 AbstractCegarLoop]: Abstraction has 491 states and 1546 transitions. [2021-06-12 20:06:05,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:05,793 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1546 transitions. [2021-06-12 20:06:05,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:05,794 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:05,794 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:05,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 840 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4719 [2021-06-12 20:06:05,994 INFO L430 AbstractCegarLoop]: === Iteration 852 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:05,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:05,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1851646195, now seen corresponding path program 840 times [2021-06-12 20:06:05,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:05,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401998971] [2021-06-12 20:06:05,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:06,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:06,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401998971] [2021-06-12 20:06:06,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401998971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:06,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602838559] [2021-06-12 20:06:06,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 841 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 841 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:06,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:06:06,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:06,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:06,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:06,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:06,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:06,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:06,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:06,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:06,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:06,141 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:06:06,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:06,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:06,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:06,206 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:06:06,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:06,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:06:06,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:06,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602838559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:06,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:06,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:06,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178777212] [2021-06-12 20:06:06,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:06,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:06,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:06,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:06,235 INFO L87 Difference]: Start difference. First operand 491 states and 1546 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:06,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:06,745 INFO L93 Difference]: Finished difference Result 965 states and 2948 transitions. [2021-06-12 20:06:06,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:06:06,745 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:06,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:06,746 INFO L225 Difference]: With dead ends: 965 [2021-06-12 20:06:06,746 INFO L226 Difference]: Without dead ends: 944 [2021-06-12 20:06:06,746 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 376.7ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:06:06,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2021-06-12 20:06:06,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 489. [2021-06-12 20:06:06,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 3.1577868852459017) internal successors, (1541), 488 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:06,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1541 transitions. [2021-06-12 20:06:06,753 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1541 transitions. Word has length 21 [2021-06-12 20:06:06,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:06,753 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1541 transitions. [2021-06-12 20:06:06,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:06,753 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1541 transitions. [2021-06-12 20:06:06,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:06,754 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:06,754 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:06,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4729,841 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:06,954 INFO L430 AbstractCegarLoop]: === Iteration 853 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:06,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:06,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1403085303, now seen corresponding path program 841 times [2021-06-12 20:06:06,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:06,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961737896] [2021-06-12 20:06:06,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:06,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:07,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:07,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:07,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961737896] [2021-06-12 20:06:07,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961737896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:07,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145132555] [2021-06-12 20:06:07,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 842 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 842 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:07,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:07,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:07,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:07,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:07,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:07,088 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:07,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:07,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:07,095 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:06:07,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:07,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:07,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:07,154 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:06:07,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:07,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:06:07,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:07,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145132555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:07,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:07,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:07,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231217936] [2021-06-12 20:06:07,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:07,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:07,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:07,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:07,183 INFO L87 Difference]: Start difference. First operand 489 states and 1541 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:07,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:07,807 INFO L93 Difference]: Finished difference Result 1040 states and 3157 transitions. [2021-06-12 20:06:07,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:06:07,808 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:07,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:07,809 INFO L225 Difference]: With dead ends: 1040 [2021-06-12 20:06:07,809 INFO L226 Difference]: Without dead ends: 1019 [2021-06-12 20:06:07,809 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 478.2ms TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:06:07,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2021-06-12 20:06:07,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 469. [2021-06-12 20:06:07,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.141025641025641) internal successors, (1470), 468 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:07,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1470 transitions. [2021-06-12 20:06:07,816 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1470 transitions. Word has length 21 [2021-06-12 20:06:07,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:07,816 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1470 transitions. [2021-06-12 20:06:07,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:07,816 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1470 transitions. [2021-06-12 20:06:07,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:07,817 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:07,817 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:08,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4735,842 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:08,017 INFO L430 AbstractCegarLoop]: === Iteration 854 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:08,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:08,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1996842505, now seen corresponding path program 842 times [2021-06-12 20:06:08,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:08,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029889404] [2021-06-12 20:06:08,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:08,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:08,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029889404] [2021-06-12 20:06:08,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029889404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:08,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350497528] [2021-06-12 20:06:08,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 843 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 843 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:08,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:06:08,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:08,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:08,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:08,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:08,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:08,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:08,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:08,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:08,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:08,149 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:06:08,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:08,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:08,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:08,188 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:06:08,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:08,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:06:08,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:08,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350497528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:08,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:08,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:06:08,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926399546] [2021-06-12 20:06:08,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:06:08,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:08,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:06:08,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:06:08,202 INFO L87 Difference]: Start difference. First operand 469 states and 1470 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:08,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:08,354 INFO L93 Difference]: Finished difference Result 752 states and 2321 transitions. [2021-06-12 20:06:08,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:08,355 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:08,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:08,355 INFO L225 Difference]: With dead ends: 752 [2021-06-12 20:06:08,356 INFO L226 Difference]: Without dead ends: 730 [2021-06-12 20:06:08,356 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 102.7ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:06:08,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-06-12 20:06:08,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 471. [2021-06-12 20:06:08,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.1382978723404253) internal successors, (1475), 470 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:08,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1475 transitions. [2021-06-12 20:06:08,361 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1475 transitions. Word has length 21 [2021-06-12 20:06:08,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:08,361 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1475 transitions. [2021-06-12 20:06:08,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:08,361 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1475 transitions. [2021-06-12 20:06:08,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:08,362 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:08,362 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:08,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4741,843 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:08,562 INFO L430 AbstractCegarLoop]: === Iteration 855 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:08,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:08,562 INFO L82 PathProgramCache]: Analyzing trace with hash 53115141, now seen corresponding path program 843 times [2021-06-12 20:06:08,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:08,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322735318] [2021-06-12 20:06:08,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:08,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:08,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:08,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:08,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322735318] [2021-06-12 20:06:08,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322735318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:08,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601301767] [2021-06-12 20:06:08,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 844 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 844 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:08,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:06:08,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:08,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:08,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:08,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:08,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:08,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:08,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:08,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:08,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:08,721 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:51, output treesize:27 [2021-06-12 20:06:08,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:08,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:08,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:08,750 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:08,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:08,758 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:06:08,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:08,759 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-06-12 20:06:08,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:08,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601301767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:08,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:08,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:06:08,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863274952] [2021-06-12 20:06:08,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:06:08,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:08,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:06:08,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:06:08,781 INFO L87 Difference]: Start difference. First operand 471 states and 1475 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:08,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:08,951 INFO L93 Difference]: Finished difference Result 763 states and 2348 transitions. [2021-06-12 20:06:08,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:08,951 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:08,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:08,952 INFO L225 Difference]: With dead ends: 763 [2021-06-12 20:06:08,952 INFO L226 Difference]: Without dead ends: 734 [2021-06-12 20:06:08,952 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:08,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-06-12 20:06:08,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 463. [2021-06-12 20:06:08,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.1277056277056277) internal successors, (1445), 462 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:08,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1445 transitions. [2021-06-12 20:06:08,958 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1445 transitions. Word has length 21 [2021-06-12 20:06:08,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:08,958 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1445 transitions. [2021-06-12 20:06:08,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:08,958 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1445 transitions. [2021-06-12 20:06:08,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:08,959 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:08,959 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:09,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4744,844 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:09,159 INFO L430 AbstractCegarLoop]: === Iteration 856 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:09,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:09,159 INFO L82 PathProgramCache]: Analyzing trace with hash 124238837, now seen corresponding path program 844 times [2021-06-12 20:06:09,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:09,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869915271] [2021-06-12 20:06:09,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:09,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:09,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:09,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869915271] [2021-06-12 20:06:09,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869915271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:09,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961609191] [2021-06-12 20:06:09,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 845 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 845 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:09,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:06:09,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:09,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:09,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:09,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:09,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:09,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:09,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:09,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:09,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:19 [2021-06-12 20:06:09,389 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 20:06:09,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:09,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:09,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:09,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:09,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:06:09,398 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:09,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:09,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:09,403 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:9 [2021-06-12 20:06:09,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:09,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961609191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:09,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:09,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:06:09,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923900064] [2021-06-12 20:06:09,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:06:09,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:09,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:06:09,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:06:09,412 INFO L87 Difference]: Start difference. First operand 463 states and 1445 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:09,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:09,532 INFO L93 Difference]: Finished difference Result 543 states and 1676 transitions. [2021-06-12 20:06:09,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:09,533 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:09,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:09,533 INFO L225 Difference]: With dead ends: 543 [2021-06-12 20:06:09,533 INFO L226 Difference]: Without dead ends: 521 [2021-06-12 20:06:09,533 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 157.9ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:06:09,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-12 20:06:09,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 469. [2021-06-12 20:06:09,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.1324786324786325) internal successors, (1466), 468 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:09,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1466 transitions. [2021-06-12 20:06:09,538 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1466 transitions. Word has length 21 [2021-06-12 20:06:09,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:09,538 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1466 transitions. [2021-06-12 20:06:09,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:09,538 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1466 transitions. [2021-06-12 20:06:09,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:09,539 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:09,539 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:09,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 845 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4749 [2021-06-12 20:06:09,739 INFO L430 AbstractCegarLoop]: === Iteration 857 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:09,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:09,740 INFO L82 PathProgramCache]: Analyzing trace with hash -377552499, now seen corresponding path program 845 times [2021-06-12 20:06:09,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:09,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204997546] [2021-06-12 20:06:09,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:09,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:09,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:09,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204997546] [2021-06-12 20:06:09,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204997546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:09,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594144284] [2021-06-12 20:06:09,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 846 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 846 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:09,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:06:09,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:09,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:09,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:09,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:09,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:09,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:09,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:09,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:06:09,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 20:06:09,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:09,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:09,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:09,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:10,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:10,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:06:10,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:10,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:10,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:10,009 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 20:06:10,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:10,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594144284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:10,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:10,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:06:10,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406730249] [2021-06-12 20:06:10,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:10,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:10,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:10,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:10,023 INFO L87 Difference]: Start difference. First operand 469 states and 1466 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:10,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:10,163 INFO L93 Difference]: Finished difference Result 552 states and 1700 transitions. [2021-06-12 20:06:10,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:10,163 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:10,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:10,164 INFO L225 Difference]: With dead ends: 552 [2021-06-12 20:06:10,164 INFO L226 Difference]: Without dead ends: 530 [2021-06-12 20:06:10,164 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:10,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-06-12 20:06:10,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 466. [2021-06-12 20:06:10,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.1268817204301076) internal successors, (1454), 465 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:10,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1454 transitions. [2021-06-12 20:06:10,169 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1454 transitions. Word has length 21 [2021-06-12 20:06:10,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:10,169 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1454 transitions. [2021-06-12 20:06:10,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:10,169 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1454 transitions. [2021-06-12 20:06:10,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:10,169 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:10,169 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:10,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4751,846 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:10,370 INFO L430 AbstractCegarLoop]: === Iteration 858 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:10,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:10,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1810630677, now seen corresponding path program 846 times [2021-06-12 20:06:10,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:10,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246296625] [2021-06-12 20:06:10,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:10,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:10,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:10,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246296625] [2021-06-12 20:06:10,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246296625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:10,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545962768] [2021-06-12 20:06:10,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 847 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 847 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:10,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:06:10,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:10,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:10,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:10,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:10,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:10,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:10,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:06:10,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-06-12 20:06:10,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:10,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:10,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:10,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:10,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:10,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:06:10,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:10,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:10,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:10,601 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:12 [2021-06-12 20:06:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:10,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545962768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:10,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:10,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:06:10,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059254487] [2021-06-12 20:06:10,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:10,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:10,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:10,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:10,615 INFO L87 Difference]: Start difference. First operand 466 states and 1454 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:10,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:10,756 INFO L93 Difference]: Finished difference Result 540 states and 1667 transitions. [2021-06-12 20:06:10,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:10,757 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:10,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:10,757 INFO L225 Difference]: With dead ends: 540 [2021-06-12 20:06:10,757 INFO L226 Difference]: Without dead ends: 518 [2021-06-12 20:06:10,757 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:10,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-12 20:06:10,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 463. [2021-06-12 20:06:10,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.1277056277056277) internal successors, (1445), 462 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:10,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1445 transitions. [2021-06-12 20:06:10,762 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1445 transitions. Word has length 21 [2021-06-12 20:06:10,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:10,762 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1445 transitions. [2021-06-12 20:06:10,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:10,762 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1445 transitions. [2021-06-12 20:06:10,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:10,763 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:10,763 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:10,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4754,847 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:10,963 INFO L430 AbstractCegarLoop]: === Iteration 859 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:10,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:10,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1164956425, now seen corresponding path program 847 times [2021-06-12 20:06:10,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:10,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052377140] [2021-06-12 20:06:10,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:11,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:11,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:11,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052377140] [2021-06-12 20:06:11,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052377140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:11,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135406046] [2021-06-12 20:06:11,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 848 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 848 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:11,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:11,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:11,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:11,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:11,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:11,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:06:11,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:26 [2021-06-12 20:06:11,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:11,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:11,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:11,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:11,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:06:11,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:11,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:11,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:11,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:11,215 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:11,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:11,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:11,227 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:13 [2021-06-12 20:06:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:11,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135406046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:11,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:11,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:11,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535840876] [2021-06-12 20:06:11,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:11,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:11,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:11,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:11,272 INFO L87 Difference]: Start difference. First operand 463 states and 1445 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:11,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:11,584 INFO L93 Difference]: Finished difference Result 728 states and 2239 transitions. [2021-06-12 20:06:11,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:06:11,584 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:11,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:11,585 INFO L225 Difference]: With dead ends: 728 [2021-06-12 20:06:11,585 INFO L226 Difference]: Without dead ends: 701 [2021-06-12 20:06:11,585 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 259.8ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:06:11,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-06-12 20:06:11,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 461. [2021-06-12 20:06:11,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.130434782608696) internal successors, (1440), 460 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:11,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1440 transitions. [2021-06-12 20:06:11,591 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1440 transitions. Word has length 21 [2021-06-12 20:06:11,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:11,591 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1440 transitions. [2021-06-12 20:06:11,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:11,591 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1440 transitions. [2021-06-12 20:06:11,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:11,592 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:11,592 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:11,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4756,848 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:11,792 INFO L430 AbstractCegarLoop]: === Iteration 860 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:11,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:11,792 INFO L82 PathProgramCache]: Analyzing trace with hash -751583577, now seen corresponding path program 848 times [2021-06-12 20:06:11,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:11,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039910054] [2021-06-12 20:06:11,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:11,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:11,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:11,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:11,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039910054] [2021-06-12 20:06:11,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039910054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:11,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554791200] [2021-06-12 20:06:11,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 849 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 849 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:11,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:06:11,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:11,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:11,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:11,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:11,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:11,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:11,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:11,964 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:11,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:11,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:11,977 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:47, output treesize:31 [2021-06-12 20:06:12,037 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 20:06:12,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:12,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:12,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:12,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:12,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:06:12,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:12,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:12,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:12,057 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:9 [2021-06-12 20:06:12,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:12,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554791200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:12,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:12,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:06:12,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009510575] [2021-06-12 20:06:12,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:06:12,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:12,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:06:12,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:06:12,066 INFO L87 Difference]: Start difference. First operand 461 states and 1440 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:12,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:12,225 INFO L93 Difference]: Finished difference Result 587 states and 1807 transitions. [2021-06-12 20:06:12,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:12,226 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:12,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:12,226 INFO L225 Difference]: With dead ends: 587 [2021-06-12 20:06:12,226 INFO L226 Difference]: Without dead ends: 565 [2021-06-12 20:06:12,226 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 161.1ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:06:12,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-12 20:06:12,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 464. [2021-06-12 20:06:12,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.136069114470842) internal successors, (1452), 463 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:12,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1452 transitions. [2021-06-12 20:06:12,231 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1452 transitions. Word has length 21 [2021-06-12 20:06:12,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:12,231 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1452 transitions. [2021-06-12 20:06:12,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:12,231 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1452 transitions. [2021-06-12 20:06:12,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:12,232 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:12,232 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:12,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4763,849 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:12,433 INFO L430 AbstractCegarLoop]: === Iteration 861 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:12,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:12,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1253374913, now seen corresponding path program 849 times [2021-06-12 20:06:12,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:12,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228415505] [2021-06-12 20:06:12,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:12,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:12,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228415505] [2021-06-12 20:06:12,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228415505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:12,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127518898] [2021-06-12 20:06:12,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 850 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 850 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:12,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:06:12,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:12,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:12,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:12,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:12,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:12,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:12,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:12,612 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:12,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:12,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:12,624 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:47, output treesize:31 [2021-06-12 20:06:12,667 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 20:06:12,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:12,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:12,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:12,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:12,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:06:12,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:12,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:12,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:12,683 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:12 [2021-06-12 20:06:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:12,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127518898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:12,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:12,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:06:12,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862742045] [2021-06-12 20:06:12,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:12,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:12,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:12,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:12,697 INFO L87 Difference]: Start difference. First operand 464 states and 1452 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:12,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:12,838 INFO L93 Difference]: Finished difference Result 578 states and 1783 transitions. [2021-06-12 20:06:12,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:12,838 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:12,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:12,839 INFO L225 Difference]: With dead ends: 578 [2021-06-12 20:06:12,839 INFO L226 Difference]: Without dead ends: 556 [2021-06-12 20:06:12,839 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 153.5ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:12,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-12 20:06:12,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 461. [2021-06-12 20:06:12,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.130434782608696) internal successors, (1440), 460 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:12,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1440 transitions. [2021-06-12 20:06:12,844 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1440 transitions. Word has length 21 [2021-06-12 20:06:12,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:12,844 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1440 transitions. [2021-06-12 20:06:12,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:12,844 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1440 transitions. [2021-06-12 20:06:12,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:12,845 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:12,845 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:13,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4766,850 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:13,045 INFO L430 AbstractCegarLoop]: === Iteration 862 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:13,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:13,045 INFO L82 PathProgramCache]: Analyzing trace with hash 2128009407, now seen corresponding path program 850 times [2021-06-12 20:06:13,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:13,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802318380] [2021-06-12 20:06:13,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:13,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:13,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:13,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802318380] [2021-06-12 20:06:13,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802318380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:13,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061895724] [2021-06-12 20:06:13,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 851 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 851 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:13,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:06:13,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:13,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:13,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:13,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:13,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:13,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:13,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:13,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:13,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:13,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:13,244 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:47, output treesize:31 [2021-06-12 20:06:13,302 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 20:06:13,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:13,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:13,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:13,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:13,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:13,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:13,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:06:13,322 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:13,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:13,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:13,335 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:15 [2021-06-12 20:06:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:13,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061895724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:13,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:13,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:06:13,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931613165] [2021-06-12 20:06:13,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:06:13,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:13,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:06:13,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:06:13,361 INFO L87 Difference]: Start difference. First operand 461 states and 1440 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:13,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:13,528 INFO L93 Difference]: Finished difference Result 598 states and 1843 transitions. [2021-06-12 20:06:13,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:13,528 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:13,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:13,529 INFO L225 Difference]: With dead ends: 598 [2021-06-12 20:06:13,529 INFO L226 Difference]: Without dead ends: 569 [2021-06-12 20:06:13,529 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 179.2ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:06:13,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-06-12 20:06:13,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 461. [2021-06-12 20:06:13,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.130434782608696) internal successors, (1440), 460 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:13,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1440 transitions. [2021-06-12 20:06:13,534 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1440 transitions. Word has length 21 [2021-06-12 20:06:13,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:13,534 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1440 transitions. [2021-06-12 20:06:13,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:13,534 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1440 transitions. [2021-06-12 20:06:13,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:13,534 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:13,534 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:13,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4769,851 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:13,735 INFO L430 AbstractCegarLoop]: === Iteration 863 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:13,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:13,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1033310489, now seen corresponding path program 851 times [2021-06-12 20:06:13,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:13,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240979407] [2021-06-12 20:06:13,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:13,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:13,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240979407] [2021-06-12 20:06:13,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240979407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:13,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131146990] [2021-06-12 20:06:13,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 852 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 852 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:13,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:06:13,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:13,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:13,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:13,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:13,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:13,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:13,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:13,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:06:13,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 20:06:14,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:14,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:14,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:14,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:14,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:06:14,005 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:14,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:14,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:14,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:14,023 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:14,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:14,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:14,038 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:63, output treesize:16 [2021-06-12 20:06:14,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:14,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131146990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:14,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:14,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:14,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70251601] [2021-06-12 20:06:14,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:14,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:14,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:14,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:14,088 INFO L87 Difference]: Start difference. First operand 461 states and 1440 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:14,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:14,470 INFO L93 Difference]: Finished difference Result 795 states and 2419 transitions. [2021-06-12 20:06:14,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:06:14,470 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:14,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:14,471 INFO L225 Difference]: With dead ends: 795 [2021-06-12 20:06:14,472 INFO L226 Difference]: Without dead ends: 741 [2021-06-12 20:06:14,472 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 299.0ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:06:14,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-06-12 20:06:14,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 462. [2021-06-12 20:06:14,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.1518438177874186) internal successors, (1453), 461 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:14,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1453 transitions. [2021-06-12 20:06:14,477 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1453 transitions. Word has length 21 [2021-06-12 20:06:14,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:14,477 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1453 transitions. [2021-06-12 20:06:14,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:14,477 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1453 transitions. [2021-06-12 20:06:14,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:14,478 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:14,478 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:14,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 852 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4777 [2021-06-12 20:06:14,678 INFO L430 AbstractCegarLoop]: === Iteration 864 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:14,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:14,679 INFO L82 PathProgramCache]: Analyzing trace with hash 409024725, now seen corresponding path program 852 times [2021-06-12 20:06:14,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:14,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664945529] [2021-06-12 20:06:14,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:14,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:14,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664945529] [2021-06-12 20:06:14,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664945529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:14,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248303326] [2021-06-12 20:06:14,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 853 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 853 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:14,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:06:14,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:14,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:14,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:14,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:14,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:14,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:14,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:14,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:14,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:14,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:14,892 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:47, output treesize:31 [2021-06-12 20:06:14,922 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 20:06:14,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:14,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:14,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:14,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:14,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:14,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:14,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:06:14,946 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:14,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:14,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:14,961 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:59, output treesize:21 [2021-06-12 20:06:14,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:14,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248303326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:14,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:14,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:06:14,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693237231] [2021-06-12 20:06:14,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:14,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:14,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:14,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:14,995 INFO L87 Difference]: Start difference. First operand 462 states and 1453 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:15,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:15,142 INFO L93 Difference]: Finished difference Result 602 states and 1859 transitions. [2021-06-12 20:06:15,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:15,142 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:15,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:15,143 INFO L225 Difference]: With dead ends: 602 [2021-06-12 20:06:15,143 INFO L226 Difference]: Without dead ends: 573 [2021-06-12 20:06:15,143 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 177.1ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:15,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-06-12 20:06:15,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 462. [2021-06-12 20:06:15,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.1518438177874186) internal successors, (1453), 461 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:15,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1453 transitions. [2021-06-12 20:06:15,148 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1453 transitions. Word has length 21 [2021-06-12 20:06:15,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:15,148 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1453 transitions. [2021-06-12 20:06:15,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:15,148 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1453 transitions. [2021-06-12 20:06:15,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:15,149 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:15,149 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:15,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4786,853 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:15,349 INFO L430 AbstractCegarLoop]: === Iteration 865 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:15,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:15,349 INFO L82 PathProgramCache]: Analyzing trace with hash -582303487, now seen corresponding path program 853 times [2021-06-12 20:06:15,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:15,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036328311] [2021-06-12 20:06:15,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:15,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:15,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036328311] [2021-06-12 20:06:15,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036328311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:15,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041986361] [2021-06-12 20:06:15,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 854 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 854 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:15,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:15,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:15,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:15,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:15,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:15,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:15,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:06:15,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 20:06:15,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:06:15,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:15,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:15,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:15,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:15,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:15,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:15,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:15,617 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:15,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:15,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:15,635 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:22 [2021-06-12 20:06:15,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:15,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041986361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:15,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:15,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:15,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306353534] [2021-06-12 20:06:15,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:15,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:15,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:15,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:15,712 INFO L87 Difference]: Start difference. First operand 462 states and 1453 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:16,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:16,033 INFO L93 Difference]: Finished difference Result 698 states and 2131 transitions. [2021-06-12 20:06:16,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:06:16,033 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:16,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:16,034 INFO L225 Difference]: With dead ends: 698 [2021-06-12 20:06:16,034 INFO L226 Difference]: Without dead ends: 671 [2021-06-12 20:06:16,035 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 267.3ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:06:16,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-06-12 20:06:16,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 457. [2021-06-12 20:06:16,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 3.129385964912281) internal successors, (1427), 456 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:16,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1427 transitions. [2021-06-12 20:06:16,040 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1427 transitions. Word has length 21 [2021-06-12 20:06:16,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:16,040 INFO L482 AbstractCegarLoop]: Abstraction has 457 states and 1427 transitions. [2021-06-12 20:06:16,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:16,041 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1427 transitions. [2021-06-12 20:06:16,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:16,041 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:16,041 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:16,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 854 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4791 [2021-06-12 20:06:16,242 INFO L430 AbstractCegarLoop]: === Iteration 866 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:16,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:16,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1805411903, now seen corresponding path program 854 times [2021-06-12 20:06:16,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:16,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192145623] [2021-06-12 20:06:16,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:16,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:16,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:16,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192145623] [2021-06-12 20:06:16,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192145623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:16,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155278200] [2021-06-12 20:06:16,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 855 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 855 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:16,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:06:16,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:16,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:16,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:16,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:16,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:16,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:16,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:16,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:16,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:16,440 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:06:16,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:16,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:16,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:16,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:16,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:16,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:06:16,510 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:16,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:16,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:16,516 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:12 [2021-06-12 20:06:16,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:16,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155278200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:16,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:16,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:06:16,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623419370] [2021-06-12 20:06:16,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:16,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:16,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:16,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:16,530 INFO L87 Difference]: Start difference. First operand 457 states and 1427 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:16,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:16,720 INFO L93 Difference]: Finished difference Result 577 states and 1779 transitions. [2021-06-12 20:06:16,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:16,720 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:16,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:16,721 INFO L225 Difference]: With dead ends: 577 [2021-06-12 20:06:16,721 INFO L226 Difference]: Without dead ends: 555 [2021-06-12 20:06:16,721 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 153.0ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:16,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-06-12 20:06:16,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 460. [2021-06-12 20:06:16,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.1350762527233114) internal successors, (1439), 459 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:16,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1439 transitions. [2021-06-12 20:06:16,725 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1439 transitions. Word has length 21 [2021-06-12 20:06:16,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:16,726 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1439 transitions. [2021-06-12 20:06:16,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:16,726 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1439 transitions. [2021-06-12 20:06:16,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:16,726 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:16,726 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:16,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 855 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4803 [2021-06-12 20:06:16,927 INFO L430 AbstractCegarLoop]: === Iteration 867 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:16,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:16,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1864231275, now seen corresponding path program 855 times [2021-06-12 20:06:16,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:16,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051511893] [2021-06-12 20:06:16,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:17,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:17,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051511893] [2021-06-12 20:06:17,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051511893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:17,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585761517] [2021-06-12 20:06:17,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 856 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 856 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:17,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:06:17,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:17,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:17,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:17,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:17,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:17,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:17,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:06:17,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 20:06:17,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:06:17,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:17,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:17,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:17,158 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:17,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:17,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:17,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:17,173 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:17,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:17,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:17,185 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:13 [2021-06-12 20:06:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:17,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585761517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:17,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:17,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:06:17,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129923959] [2021-06-12 20:06:17,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:17,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:17,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:17,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:17,204 INFO L87 Difference]: Start difference. First operand 460 states and 1439 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:17,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:17,391 INFO L93 Difference]: Finished difference Result 570 states and 1749 transitions. [2021-06-12 20:06:17,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:17,391 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:17,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:17,392 INFO L225 Difference]: With dead ends: 570 [2021-06-12 20:06:17,392 INFO L226 Difference]: Without dead ends: 543 [2021-06-12 20:06:17,392 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 138.0ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:17,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-12 20:06:17,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 460. [2021-06-12 20:06:17,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.130718954248366) internal successors, (1437), 459 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:17,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1437 transitions. [2021-06-12 20:06:17,397 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1437 transitions. Word has length 21 [2021-06-12 20:06:17,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:17,397 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1437 transitions. [2021-06-12 20:06:17,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:17,397 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1437 transitions. [2021-06-12 20:06:17,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:17,398 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:17,398 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:17,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 856 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4807 [2021-06-12 20:06:17,598 INFO L430 AbstractCegarLoop]: === Iteration 868 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:17,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:17,599 INFO L82 PathProgramCache]: Analyzing trace with hash 2146473337, now seen corresponding path program 856 times [2021-06-12 20:06:17,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:17,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694751408] [2021-06-12 20:06:17,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:17,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:17,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:17,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694751408] [2021-06-12 20:06:17,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694751408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:17,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538092823] [2021-06-12 20:06:17,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 857 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 857 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:17,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:06:17,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:17,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:17,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:17,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:17,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:17,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:17,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:17,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:17,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:17,782 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:06:17,856 INFO L446 ElimStorePlain]: Different costs {0=[o_0, o_2], 1=[v_prenex_252, v_prenex_253]} [2021-06-12 20:06:17,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:17,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:17,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:17,869 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:06:17,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:17,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:17,872 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:17,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:17,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:17,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:17,883 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:17,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:17,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:17,892 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:43, output treesize:13 [2021-06-12 20:06:17,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:17,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538092823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:17,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:17,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:06:17,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25939591] [2021-06-12 20:06:17,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:06:17,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:17,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:06:17,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:06:17,923 INFO L87 Difference]: Start difference. First operand 460 states and 1437 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:18,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:18,102 INFO L93 Difference]: Finished difference Result 623 states and 1896 transitions. [2021-06-12 20:06:18,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:06:18,102 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:18,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:18,103 INFO L225 Difference]: With dead ends: 623 [2021-06-12 20:06:18,103 INFO L226 Difference]: Without dead ends: 596 [2021-06-12 20:06:18,103 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 191.0ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:18,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-06-12 20:06:18,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 473. [2021-06-12 20:06:18,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.1271186440677967) internal successors, (1476), 472 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:18,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1476 transitions. [2021-06-12 20:06:18,109 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1476 transitions. Word has length 21 [2021-06-12 20:06:18,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:18,109 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1476 transitions. [2021-06-12 20:06:18,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:18,109 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1476 transitions. [2021-06-12 20:06:18,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:18,109 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:18,109 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:18,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 857 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4815 [2021-06-12 20:06:18,317 INFO L430 AbstractCegarLoop]: === Iteration 869 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:18,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:18,317 INFO L82 PathProgramCache]: Analyzing trace with hash -462102119, now seen corresponding path program 857 times [2021-06-12 20:06:18,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:18,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021822703] [2021-06-12 20:06:18,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:18,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:18,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021822703] [2021-06-12 20:06:18,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021822703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:18,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085941460] [2021-06-12 20:06:18,448 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 858 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 858 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:18,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:06:18,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:18,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:18,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:18,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:18,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:18,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:18,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:18,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:18,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:18,551 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:06:18,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:18,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:18,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:18,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:18,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:18,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:18,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:18,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:18,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:18,651 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:28, output treesize:7 [2021-06-12 20:06:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:18,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085941460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:18,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:18,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:18,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450860081] [2021-06-12 20:06:18,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:18,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:18,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:18,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:18,682 INFO L87 Difference]: Start difference. First operand 473 states and 1476 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:18,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:18,943 INFO L93 Difference]: Finished difference Result 632 states and 1936 transitions. [2021-06-12 20:06:18,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:06:18,943 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:18,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:18,944 INFO L225 Difference]: With dead ends: 632 [2021-06-12 20:06:18,944 INFO L226 Difference]: Without dead ends: 611 [2021-06-12 20:06:18,944 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 259.5ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:06:18,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-06-12 20:06:18,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 463. [2021-06-12 20:06:18,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.1363636363636362) internal successors, (1449), 462 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:18,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1449 transitions. [2021-06-12 20:06:18,949 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1449 transitions. Word has length 21 [2021-06-12 20:06:18,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:18,949 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1449 transitions. [2021-06-12 20:06:18,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:18,949 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1449 transitions. [2021-06-12 20:06:18,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:18,950 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:18,950 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:19,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 858 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4828 [2021-06-12 20:06:19,172 INFO L430 AbstractCegarLoop]: === Iteration 870 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:19,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:19,172 INFO L82 PathProgramCache]: Analyzing trace with hash -439597747, now seen corresponding path program 858 times [2021-06-12 20:06:19,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:19,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836124837] [2021-06-12 20:06:19,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:19,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:19,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836124837] [2021-06-12 20:06:19,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836124837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:19,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610936754] [2021-06-12 20:06:19,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 859 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 859 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:19,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:06:19,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:19,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:19,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:19,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:19,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:19,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:19,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:19,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:19,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:19,375 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:06:19,408 INFO L446 ElimStorePlain]: Different costs {0=[o_0, o_2], 1=[v_prenex_254, v_prenex_255]} [2021-06-12 20:06:19,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:19,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:19,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:19,423 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:06:19,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:19,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:19,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:19,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:19,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:19,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:06:19,440 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:19,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:19,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:19,451 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:51, output treesize:21 [2021-06-12 20:06:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:19,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610936754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:19,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:19,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:06:19,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797615965] [2021-06-12 20:06:19,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:19,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:19,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:19,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:19,485 INFO L87 Difference]: Start difference. First operand 463 states and 1449 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:19,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:19,645 INFO L93 Difference]: Finished difference Result 595 states and 1838 transitions. [2021-06-12 20:06:19,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:19,645 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:19,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:19,646 INFO L225 Difference]: With dead ends: 595 [2021-06-12 20:06:19,646 INFO L226 Difference]: Without dead ends: 566 [2021-06-12 20:06:19,646 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 160.1ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:19,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-12 20:06:19,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 463. [2021-06-12 20:06:19,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.1363636363636362) internal successors, (1449), 462 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:19,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1449 transitions. [2021-06-12 20:06:19,650 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1449 transitions. Word has length 21 [2021-06-12 20:06:19,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:19,651 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1449 transitions. [2021-06-12 20:06:19,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:19,651 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1449 transitions. [2021-06-12 20:06:19,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:19,651 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:19,651 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:19,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 859 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4836 [2021-06-12 20:06:19,852 INFO L430 AbstractCegarLoop]: === Iteration 871 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:19,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:19,852 INFO L82 PathProgramCache]: Analyzing trace with hash -142331337, now seen corresponding path program 859 times [2021-06-12 20:06:19,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:19,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819169736] [2021-06-12 20:06:19,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:19,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:19,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:19,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819169736] [2021-06-12 20:06:19,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819169736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:19,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965429081] [2021-06-12 20:06:19,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 860 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 860 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:19,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:19,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:19,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:20,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:20,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:20,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:20,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:06:20,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 20:06:20,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:20,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:20,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:20,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:20,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:06:20,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:20,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:20,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:20,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:20,102 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:20,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:20,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:20,117 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:65, output treesize:19 [2021-06-12 20:06:20,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:20,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965429081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:20,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:20,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:20,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369432710] [2021-06-12 20:06:20,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:20,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:20,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:20,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:20,191 INFO L87 Difference]: Start difference. First operand 463 states and 1449 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:20,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:20,546 INFO L93 Difference]: Finished difference Result 732 states and 2246 transitions. [2021-06-12 20:06:20,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:06:20,546 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:20,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:20,547 INFO L225 Difference]: With dead ends: 732 [2021-06-12 20:06:20,547 INFO L226 Difference]: Without dead ends: 709 [2021-06-12 20:06:20,547 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 339.7ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:06:20,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-06-12 20:06:20,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 462. [2021-06-12 20:06:20,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.1453362255965294) internal successors, (1450), 461 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:20,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1450 transitions. [2021-06-12 20:06:20,552 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1450 transitions. Word has length 21 [2021-06-12 20:06:20,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:20,553 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1450 transitions. [2021-06-12 20:06:20,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:20,553 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1450 transitions. [2021-06-12 20:06:20,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:20,553 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:20,553 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:20,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4842,860 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:20,754 INFO L430 AbstractCegarLoop]: === Iteration 872 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:20,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:20,754 INFO L82 PathProgramCache]: Analyzing trace with hash -426594021, now seen corresponding path program 860 times [2021-06-12 20:06:20,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:20,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284653583] [2021-06-12 20:06:20,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:20,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:20,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284653583] [2021-06-12 20:06:20,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284653583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:20,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090130851] [2021-06-12 20:06:20,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 861 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 861 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:20,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:06:20,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:20,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:20,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:20,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:20,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:20,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:20,950 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:20,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:20,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:20,966 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:06:21,004 INFO L446 ElimStorePlain]: Different costs {0=[o_0, o_2], 1=[v_prenex_256, v_prenex_257]} [2021-06-12 20:06:21,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:21,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:21,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:21,020 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:06:21,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:21,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:21,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:21,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:21,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:21,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:21,036 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:21,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:21,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:21,047 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:51, output treesize:19 [2021-06-12 20:06:21,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:21,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090130851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:21,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:21,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:21,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353261874] [2021-06-12 20:06:21,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:21,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:21,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:21,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:21,124 INFO L87 Difference]: Start difference. First operand 462 states and 1450 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:21,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:21,418 INFO L93 Difference]: Finished difference Result 688 states and 2101 transitions. [2021-06-12 20:06:21,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:06:21,418 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:21,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:21,419 INFO L225 Difference]: With dead ends: 688 [2021-06-12 20:06:21,419 INFO L226 Difference]: Without dead ends: 661 [2021-06-12 20:06:21,419 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 272.9ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:06:21,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-06-12 20:06:21,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 473. [2021-06-12 20:06:21,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.1483050847457625) internal successors, (1486), 472 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:21,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1486 transitions. [2021-06-12 20:06:21,424 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1486 transitions. Word has length 21 [2021-06-12 20:06:21,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:21,424 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1486 transitions. [2021-06-12 20:06:21,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:21,424 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1486 transitions. [2021-06-12 20:06:21,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:21,425 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:21,425 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:21,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4849,861 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:21,625 INFO L430 AbstractCegarLoop]: === Iteration 873 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:21,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:21,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1649095769, now seen corresponding path program 861 times [2021-06-12 20:06:21,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:21,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185282140] [2021-06-12 20:06:21,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:21,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:21,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:21,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185282140] [2021-06-12 20:06:21,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185282140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:21,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529999727] [2021-06-12 20:06:21,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 862 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 862 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:21,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:06:21,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:21,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:21,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:21,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:21,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:21,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:21,818 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:21,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:21,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:21,834 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:06:21,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:21,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:21,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:21,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:21,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:21,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:21,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:21,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:21,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:21,914 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:10 [2021-06-12 20:06:21,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:21,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529999727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:21,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:21,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:21,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700710977] [2021-06-12 20:06:21,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:21,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:21,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:21,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:21,960 INFO L87 Difference]: Start difference. First operand 473 states and 1486 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:22,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:22,224 INFO L93 Difference]: Finished difference Result 637 states and 1957 transitions. [2021-06-12 20:06:22,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:06:22,224 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:22,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:22,225 INFO L225 Difference]: With dead ends: 637 [2021-06-12 20:06:22,225 INFO L226 Difference]: Without dead ends: 616 [2021-06-12 20:06:22,225 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 216.7ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:06:22,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-06-12 20:06:22,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 456. [2021-06-12 20:06:22,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.1274725274725275) internal successors, (1423), 455 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:22,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1423 transitions. [2021-06-12 20:06:22,230 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1423 transitions. Word has length 21 [2021-06-12 20:06:22,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:22,230 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1423 transitions. [2021-06-12 20:06:22,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:22,230 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1423 transitions. [2021-06-12 20:06:22,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:22,231 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:22,231 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:22,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4862,862 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:22,431 INFO L430 AbstractCegarLoop]: === Iteration 874 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:22,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:22,432 INFO L82 PathProgramCache]: Analyzing trace with hash 323402135, now seen corresponding path program 862 times [2021-06-12 20:06:22,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:22,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347324057] [2021-06-12 20:06:22,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:22,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:22,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347324057] [2021-06-12 20:06:22,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347324057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:22,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508941760] [2021-06-12 20:06:22,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 863 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 863 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:22,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:06:22,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:22,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:22,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:22,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:22,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:22,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:22,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:22,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:22,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:22,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:22,621 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:06:22,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:22,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:22,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:22,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:22,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:22,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:06:22,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:22,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:22,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:22,738 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:9 [2021-06-12 20:06:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:22,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508941760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:22,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:22,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:06:22,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137004620] [2021-06-12 20:06:22,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:06:22,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:22,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:06:22,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:06:22,746 INFO L87 Difference]: Start difference. First operand 456 states and 1423 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:22,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:22,910 INFO L93 Difference]: Finished difference Result 549 states and 1693 transitions. [2021-06-12 20:06:22,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:22,910 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:22,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:22,911 INFO L225 Difference]: With dead ends: 549 [2021-06-12 20:06:22,911 INFO L226 Difference]: Without dead ends: 527 [2021-06-12 20:06:22,911 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 162.5ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:06:22,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-06-12 20:06:22,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 467. [2021-06-12 20:06:22,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.1394849785407724) internal successors, (1463), 466 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:22,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1463 transitions. [2021-06-12 20:06:22,916 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1463 transitions. Word has length 21 [2021-06-12 20:06:22,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:22,916 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1463 transitions. [2021-06-12 20:06:22,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:22,916 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1463 transitions. [2021-06-12 20:06:22,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:22,916 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:22,916 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:23,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4867,863 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:23,117 INFO L430 AbstractCegarLoop]: === Iteration 875 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:23,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:23,118 INFO L82 PathProgramCache]: Analyzing trace with hash -178389201, now seen corresponding path program 863 times [2021-06-12 20:06:23,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:23,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930909994] [2021-06-12 20:06:23,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:23,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:23,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:23,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:23,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930909994] [2021-06-12 20:06:23,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930909994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:23,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886683237] [2021-06-12 20:06:23,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 864 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 864 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:23,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:06:23,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:23,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:23,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:23,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:23,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:23,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:23,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:23,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:23,292 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:23,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:23,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:23,307 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:06:23,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:23,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:23,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:23,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:23,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:23,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:06:23,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:23,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:23,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:23,400 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:12 [2021-06-12 20:06:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:23,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886683237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:23,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:23,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:06:23,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573440632] [2021-06-12 20:06:23,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:23,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:23,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:23,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:23,416 INFO L87 Difference]: Start difference. First operand 467 states and 1463 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:23,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:23,575 INFO L93 Difference]: Finished difference Result 558 states and 1717 transitions. [2021-06-12 20:06:23,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:23,575 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:23,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:23,576 INFO L225 Difference]: With dead ends: 558 [2021-06-12 20:06:23,576 INFO L226 Difference]: Without dead ends: 536 [2021-06-12 20:06:23,576 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 141.7ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:23,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-12 20:06:23,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 464. [2021-06-12 20:06:23,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.1339092872570196) internal successors, (1451), 463 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:23,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1451 transitions. [2021-06-12 20:06:23,582 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1451 transitions. Word has length 21 [2021-06-12 20:06:23,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:23,582 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1451 transitions. [2021-06-12 20:06:23,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:23,582 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1451 transitions. [2021-06-12 20:06:23,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:23,583 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:23,583 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:23,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 864 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4874 [2021-06-12 20:06:23,784 INFO L430 AbstractCegarLoop]: === Iteration 876 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:23,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:23,784 INFO L82 PathProgramCache]: Analyzing trace with hash 948726253, now seen corresponding path program 864 times [2021-06-12 20:06:23,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:23,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452411872] [2021-06-12 20:06:23,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:23,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:23,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:23,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452411872] [2021-06-12 20:06:23,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452411872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:23,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589028201] [2021-06-12 20:06:23,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 865 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 865 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:23,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:06:23,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:23,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:23,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:23,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:23,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:23,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:23,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:23,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:23,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:23,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:23,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:23,987 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:06:24,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:24,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:24,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:24,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:24,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:24,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:24,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:24,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:24,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:24,122 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:7 [2021-06-12 20:06:24,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:24,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589028201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:24,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:24,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:24,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964099772] [2021-06-12 20:06:24,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:24,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:24,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:24,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:24,150 INFO L87 Difference]: Start difference. First operand 464 states and 1451 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:24,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:24,489 INFO L93 Difference]: Finished difference Result 661 states and 2032 transitions. [2021-06-12 20:06:24,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:06:24,490 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:24,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:24,491 INFO L225 Difference]: With dead ends: 661 [2021-06-12 20:06:24,491 INFO L226 Difference]: Without dead ends: 642 [2021-06-12 20:06:24,491 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 329.1ms TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:06:24,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-06-12 20:06:24,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 474. [2021-06-12 20:06:24,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.1501057082452433) internal successors, (1490), 473 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:24,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1490 transitions. [2021-06-12 20:06:24,496 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1490 transitions. Word has length 21 [2021-06-12 20:06:24,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:24,496 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1490 transitions. [2021-06-12 20:06:24,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:24,496 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1490 transitions. [2021-06-12 20:06:24,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:24,497 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:24,497 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:24,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 865 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4881 [2021-06-12 20:06:24,697 INFO L430 AbstractCegarLoop]: === Iteration 877 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:24,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:24,697 INFO L82 PathProgramCache]: Analyzing trace with hash 726517641, now seen corresponding path program 865 times [2021-06-12 20:06:24,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:24,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877267425] [2021-06-12 20:06:24,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:24,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:24,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877267425] [2021-06-12 20:06:24,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877267425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:24,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488264667] [2021-06-12 20:06:24,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 866 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 866 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:24,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:24,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:24,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:24,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:24,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:24,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:24,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:24,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:06:24,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 20:06:24,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:24,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:24,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:24,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:24,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:06:24,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:24,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:24,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:24,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:24,993 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:25,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:25,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:25,004 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:51, output treesize:5 [2021-06-12 20:06:25,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:25,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488264667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:25,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:25,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:25,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738703380] [2021-06-12 20:06:25,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:25,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:25,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:25,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:25,031 INFO L87 Difference]: Start difference. First operand 474 states and 1490 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:25,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:25,336 INFO L93 Difference]: Finished difference Result 767 states and 2342 transitions. [2021-06-12 20:06:25,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:06:25,336 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:25,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:25,337 INFO L225 Difference]: With dead ends: 767 [2021-06-12 20:06:25,337 INFO L226 Difference]: Without dead ends: 707 [2021-06-12 20:06:25,337 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 223.8ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:06:25,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-06-12 20:06:25,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 474. [2021-06-12 20:06:25,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.13953488372093) internal successors, (1485), 473 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:25,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1485 transitions. [2021-06-12 20:06:25,343 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1485 transitions. Word has length 21 [2021-06-12 20:06:25,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:25,343 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1485 transitions. [2021-06-12 20:06:25,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:25,343 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1485 transitions. [2021-06-12 20:06:25,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:25,343 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:25,344 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:25,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4891,866 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:25,544 INFO L430 AbstractCegarLoop]: === Iteration 878 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:25,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:25,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1659849203, now seen corresponding path program 866 times [2021-06-12 20:06:25,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:25,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188350521] [2021-06-12 20:06:25,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:25,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:25,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:25,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:25,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188350521] [2021-06-12 20:06:25,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188350521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:25,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698818080] [2021-06-12 20:06:25,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 867 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 867 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:25,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:06:25,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:25,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:25,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:25,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:25,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:25,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:25,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:25,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:25,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:25,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:25,743 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:06:25,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:25,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:25,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:25,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:25,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:25,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:25,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:25,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:25,854 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:25,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:25,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:25,868 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:13 [2021-06-12 20:06:25,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:25,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698818080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:25,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:25,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:25,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505314468] [2021-06-12 20:06:25,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:25,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:25,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:25,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:25,915 INFO L87 Difference]: Start difference. First operand 474 states and 1485 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:26,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:26,199 INFO L93 Difference]: Finished difference Result 769 states and 2345 transitions. [2021-06-12 20:06:26,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:06:26,199 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:26,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:26,200 INFO L225 Difference]: With dead ends: 769 [2021-06-12 20:06:26,200 INFO L226 Difference]: Without dead ends: 746 [2021-06-12 20:06:26,200 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 272.6ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:06:26,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2021-06-12 20:06:26,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 478. [2021-06-12 20:06:26,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.138364779874214) internal successors, (1497), 477 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:26,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1497 transitions. [2021-06-12 20:06:26,206 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1497 transitions. Word has length 21 [2021-06-12 20:06:26,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:26,206 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1497 transitions. [2021-06-12 20:06:26,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:26,207 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1497 transitions. [2021-06-12 20:06:26,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:26,207 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:26,207 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:26,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4901,867 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:26,408 INFO L430 AbstractCegarLoop]: === Iteration 879 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:26,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:26,408 INFO L82 PathProgramCache]: Analyzing trace with hash 636989711, now seen corresponding path program 867 times [2021-06-12 20:06:26,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:26,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361385164] [2021-06-12 20:06:26,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:26,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:26,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:26,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361385164] [2021-06-12 20:06:26,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361385164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:26,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548200318] [2021-06-12 20:06:26,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 868 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 868 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:26,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:06:26,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:26,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:26,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:26,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:26,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:26,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:26,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:26,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:26,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:26,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:26,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:26,609 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:06:26,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:26,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:26,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:26,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:26,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:26,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:26,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:26,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:26,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:26,703 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:10 [2021-06-12 20:06:26,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:26,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548200318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:26,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:26,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:26,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768215605] [2021-06-12 20:06:26,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:26,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:26,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:26,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:26,748 INFO L87 Difference]: Start difference. First operand 478 states and 1497 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:27,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:27,050 INFO L93 Difference]: Finished difference Result 669 states and 2051 transitions. [2021-06-12 20:06:27,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:06:27,050 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:27,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:27,051 INFO L225 Difference]: With dead ends: 669 [2021-06-12 20:06:27,051 INFO L226 Difference]: Without dead ends: 650 [2021-06-12 20:06:27,051 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 282.5ms TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:06:27,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-06-12 20:06:27,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 474. [2021-06-12 20:06:27,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.13107822410148) internal successors, (1481), 473 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:27,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1481 transitions. [2021-06-12 20:06:27,057 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1481 transitions. Word has length 21 [2021-06-12 20:06:27,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:27,057 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1481 transitions. [2021-06-12 20:06:27,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:27,057 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1481 transitions. [2021-06-12 20:06:27,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:27,058 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:27,058 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:27,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4913,868 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:27,258 INFO L430 AbstractCegarLoop]: === Iteration 880 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:27,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:27,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1091972177, now seen corresponding path program 868 times [2021-06-12 20:06:27,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:27,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398229743] [2021-06-12 20:06:27,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:27,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:27,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398229743] [2021-06-12 20:06:27,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398229743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:27,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845489611] [2021-06-12 20:06:27,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 869 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 869 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:27,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:06:27,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:27,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:27,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:27,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:27,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:27,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:27,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:27,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:27,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:27,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:27,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:27,452 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:06:27,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:27,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:27,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:27,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:27,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:27,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:27,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:27,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:06:27,556 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:27,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:27,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:27,570 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:15 [2021-06-12 20:06:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:27,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845489611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:27,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:27,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:06:27,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580130412] [2021-06-12 20:06:27,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:06:27,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:27,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:06:27,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:06:27,597 INFO L87 Difference]: Start difference. First operand 474 states and 1481 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:27,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:27,794 INFO L93 Difference]: Finished difference Result 604 states and 1865 transitions. [2021-06-12 20:06:27,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:27,795 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:27,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:27,796 INFO L225 Difference]: With dead ends: 604 [2021-06-12 20:06:27,796 INFO L226 Difference]: Without dead ends: 575 [2021-06-12 20:06:27,796 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 163.5ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:06:27,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-06-12 20:06:27,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 474. [2021-06-12 20:06:27,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.13107822410148) internal successors, (1481), 473 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:27,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1481 transitions. [2021-06-12 20:06:27,800 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1481 transitions. Word has length 21 [2021-06-12 20:06:27,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:27,800 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1481 transitions. [2021-06-12 20:06:27,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:27,801 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1481 transitions. [2021-06-12 20:06:27,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:27,801 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:27,801 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:28,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 869 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4917 [2021-06-12 20:06:28,002 INFO L430 AbstractCegarLoop]: === Iteration 881 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:28,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:28,002 INFO L82 PathProgramCache]: Analyzing trace with hash 2108296201, now seen corresponding path program 869 times [2021-06-12 20:06:28,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:28,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389077672] [2021-06-12 20:06:28,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:28,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:28,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:28,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389077672] [2021-06-12 20:06:28,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389077672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:28,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276434398] [2021-06-12 20:06:28,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 870 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 870 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:28,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:06:28,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:28,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:28,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:28,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:28,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:28,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:28,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:28,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:06:28,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 20:06:28,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:06:28,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:28,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:28,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:28,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:28,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:28,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:28,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:28,267 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:28,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:28,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:28,281 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:61, output treesize:13 [2021-06-12 20:06:28,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:28,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276434398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:28,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:28,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:06:28,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231676619] [2021-06-12 20:06:28,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:28,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:28,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:28,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:28,300 INFO L87 Difference]: Start difference. First operand 474 states and 1481 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:28,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:28,455 INFO L93 Difference]: Finished difference Result 567 states and 1748 transitions. [2021-06-12 20:06:28,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:28,456 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:28,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:28,456 INFO L225 Difference]: With dead ends: 567 [2021-06-12 20:06:28,456 INFO L226 Difference]: Without dead ends: 540 [2021-06-12 20:06:28,457 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 149.4ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:06:28,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-12 20:06:28,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 471. [2021-06-12 20:06:28,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.1340425531914895) internal successors, (1473), 470 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:28,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1473 transitions. [2021-06-12 20:06:28,461 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1473 transitions. Word has length 21 [2021-06-12 20:06:28,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:28,461 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1473 transitions. [2021-06-12 20:06:28,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:28,461 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1473 transitions. [2021-06-12 20:06:28,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:28,462 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:28,462 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:28,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 870 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4929 [2021-06-12 20:06:28,663 INFO L430 AbstractCegarLoop]: === Iteration 882 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:28,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:28,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1484010437, now seen corresponding path program 870 times [2021-06-12 20:06:28,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:28,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177932005] [2021-06-12 20:06:28,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:28,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:28,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:28,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177932005] [2021-06-12 20:06:28,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177932005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:28,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048856276] [2021-06-12 20:06:28,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 871 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 871 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:28,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:06:28,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:28,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:28,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:28,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:28,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:28,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:28,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:28,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:28,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:28,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:28,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:28,863 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:06:28,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:28,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:28,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:28,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:28,909 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:28,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:28,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:28,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:06:28,929 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:28,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:28,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:28,947 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:65, output treesize:21 [2021-06-12 20:06:28,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:28,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048856276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:28,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:28,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:06:28,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203805429] [2021-06-12 20:06:28,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:28,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:28,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:28,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:28,982 INFO L87 Difference]: Start difference. First operand 471 states and 1473 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:29,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:29,141 INFO L93 Difference]: Finished difference Result 607 states and 1873 transitions. [2021-06-12 20:06:29,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:29,141 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:29,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:29,142 INFO L225 Difference]: With dead ends: 607 [2021-06-12 20:06:29,142 INFO L226 Difference]: Without dead ends: 578 [2021-06-12 20:06:29,142 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 150.7ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:29,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-12 20:06:29,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 471. [2021-06-12 20:06:29,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.1340425531914895) internal successors, (1473), 470 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:29,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1473 transitions. [2021-06-12 20:06:29,147 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1473 transitions. Word has length 21 [2021-06-12 20:06:29,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:29,147 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1473 transitions. [2021-06-12 20:06:29,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:29,147 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1473 transitions. [2021-06-12 20:06:29,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:29,147 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:29,147 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:29,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 871 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4936 [2021-06-12 20:06:29,348 INFO L430 AbstractCegarLoop]: === Iteration 883 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:29,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:29,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1781276847, now seen corresponding path program 871 times [2021-06-12 20:06:29,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:29,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177741856] [2021-06-12 20:06:29,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:29,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:29,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177741856] [2021-06-12 20:06:29,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177741856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:29,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907103784] [2021-06-12 20:06:29,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 872 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 872 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:29,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:29,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:29,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:29,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:29,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:29,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:29,524 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:29,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:29,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:29,543 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:06:29,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:29,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:29,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:29,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:29,593 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:29,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:29,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:29,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:29,612 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:29,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:29,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:29,629 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:67, output treesize:19 [2021-06-12 20:06:29,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:29,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907103784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:29,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:29,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:06:29,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840771308] [2021-06-12 20:06:29,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:06:29,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:29,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:06:29,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:06:29,653 INFO L87 Difference]: Start difference. First operand 471 states and 1473 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:29,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:29,851 INFO L93 Difference]: Finished difference Result 666 states and 2035 transitions. [2021-06-12 20:06:29,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:29,852 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:29,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:29,852 INFO L225 Difference]: With dead ends: 666 [2021-06-12 20:06:29,853 INFO L226 Difference]: Without dead ends: 643 [2021-06-12 20:06:29,853 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 148.9ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:29,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-06-12 20:06:29,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 475. [2021-06-12 20:06:29,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.151898734177215) internal successors, (1494), 474 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:29,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1494 transitions. [2021-06-12 20:06:29,858 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1494 transitions. Word has length 21 [2021-06-12 20:06:29,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:29,858 INFO L482 AbstractCegarLoop]: Abstraction has 475 states and 1494 transitions. [2021-06-12 20:06:29,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:29,858 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1494 transitions. [2021-06-12 20:06:29,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:29,858 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:29,858 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:30,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4945,872 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:30,059 INFO L430 AbstractCegarLoop]: === Iteration 884 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:30,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:30,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1497014163, now seen corresponding path program 872 times [2021-06-12 20:06:30,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:30,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008888423] [2021-06-12 20:06:30,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:30,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:30,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:30,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008888423] [2021-06-12 20:06:30,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008888423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:30,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842792888] [2021-06-12 20:06:30,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 873 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 873 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:30,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:06:30,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:30,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:30,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:30,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:30,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:30,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:30,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:30,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:06:30,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 20:06:30,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:30,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:30,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:30,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:30,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:06:30,290 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:30,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:30,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:30,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:30,321 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:30,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:30,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:30,338 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:67, output treesize:19 [2021-06-12 20:06:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:30,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842792888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:30,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:30,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:30,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356174618] [2021-06-12 20:06:30,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:30,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:30,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:30,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:30,415 INFO L87 Difference]: Start difference. First operand 475 states and 1494 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:30,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:30,622 INFO L93 Difference]: Finished difference Result 659 states and 2030 transitions. [2021-06-12 20:06:30,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:06:30,622 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:30,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:30,623 INFO L225 Difference]: With dead ends: 659 [2021-06-12 20:06:30,623 INFO L226 Difference]: Without dead ends: 632 [2021-06-12 20:06:30,623 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 215.2ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:06:30,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-06-12 20:06:30,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 473. [2021-06-12 20:06:30,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.141949152542373) internal successors, (1483), 472 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:30,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1483 transitions. [2021-06-12 20:06:30,628 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1483 transitions. Word has length 21 [2021-06-12 20:06:30,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:30,628 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1483 transitions. [2021-06-12 20:06:30,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:30,628 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1483 transitions. [2021-06-12 20:06:30,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:30,629 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:30,629 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:30,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4952,873 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:30,829 INFO L430 AbstractCegarLoop]: === Iteration 885 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:30,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:30,830 INFO L82 PathProgramCache]: Analyzing trace with hash 72903839, now seen corresponding path program 873 times [2021-06-12 20:06:30,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:30,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346597670] [2021-06-12 20:06:30,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:30,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:30,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:30,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346597670] [2021-06-12 20:06:30,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346597670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:30,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808829767] [2021-06-12 20:06:30,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 874 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 874 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:30,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:06:30,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:30,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:30,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:31,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:31,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:31,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:31,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:31,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:06:31,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 20:06:31,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:31,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:31,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:31,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:31,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:31,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:31,107 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:31,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:31,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:31,124 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:7 [2021-06-12 20:06:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:31,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808829767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:31,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:31,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:31,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423574763] [2021-06-12 20:06:31,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:31,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:31,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:31,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:31,151 INFO L87 Difference]: Start difference. First operand 473 states and 1483 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:31,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:31,433 INFO L93 Difference]: Finished difference Result 676 states and 2071 transitions. [2021-06-12 20:06:31,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:06:31,434 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:31,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:31,435 INFO L225 Difference]: With dead ends: 676 [2021-06-12 20:06:31,435 INFO L226 Difference]: Without dead ends: 657 [2021-06-12 20:06:31,435 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 299.5ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:06:31,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-06-12 20:06:31,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 477. [2021-06-12 20:06:31,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.1407563025210083) internal successors, (1495), 476 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:31,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1495 transitions. [2021-06-12 20:06:31,441 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1495 transitions. Word has length 21 [2021-06-12 20:06:31,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:31,441 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1495 transitions. [2021-06-12 20:06:31,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:31,442 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1495 transitions. [2021-06-12 20:06:31,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:31,442 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:31,442 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:31,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4964,874 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:31,643 INFO L430 AbstractCegarLoop]: === Iteration 886 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:31,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:31,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1960732641, now seen corresponding path program 874 times [2021-06-12 20:06:31,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:31,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093986537] [2021-06-12 20:06:31,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:31,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:31,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093986537] [2021-06-12 20:06:31,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093986537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:31,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577576878] [2021-06-12 20:06:31,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 875 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 875 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:31,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:06:31,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:31,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:31,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:31,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:31,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:31,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:31,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:31,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:06:31,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 20:06:31,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:31,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:31,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:31,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:31,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:31,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:31,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:31,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:31,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:31,919 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:10 [2021-06-12 20:06:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:31,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577576878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:31,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:31,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:31,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084894257] [2021-06-12 20:06:31,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:31,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:31,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:31,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:31,962 INFO L87 Difference]: Start difference. First operand 477 states and 1495 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:32,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:32,226 INFO L93 Difference]: Finished difference Result 662 states and 2034 transitions. [2021-06-12 20:06:32,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:06:32,226 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:32,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:32,227 INFO L225 Difference]: With dead ends: 662 [2021-06-12 20:06:32,227 INFO L226 Difference]: Without dead ends: 643 [2021-06-12 20:06:32,228 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 302.0ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:06:32,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-06-12 20:06:32,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 464. [2021-06-12 20:06:32,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.125269978401728) internal successors, (1447), 463 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:32,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1447 transitions. [2021-06-12 20:06:32,233 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1447 transitions. Word has length 21 [2021-06-12 20:06:32,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:32,233 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1447 transitions. [2021-06-12 20:06:32,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:32,233 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1447 transitions. [2021-06-12 20:06:32,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:32,233 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:32,233 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:32,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 875 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4970 [2021-06-12 20:06:32,434 INFO L430 AbstractCegarLoop]: === Iteration 887 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:32,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:32,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1342470473, now seen corresponding path program 875 times [2021-06-12 20:06:32,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:32,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72530578] [2021-06-12 20:06:32,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:32,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:32,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:32,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72530578] [2021-06-12 20:06:32,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72530578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:32,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122309803] [2021-06-12 20:06:32,541 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 876 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 876 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:32,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:06:32,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:32,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:06:32,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:32,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:32,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:32,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:32,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:32,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:06:32,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 20:06:32,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:32,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:32,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:32,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:32,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:32,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:32,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:32,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:32,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:32,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:32,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:32,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:32,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:32,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:32,708 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:32,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:32,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:32,737 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:93, output treesize:31 [2021-06-12 20:06:32,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:32,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122309803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:32,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:32,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:32,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203731462] [2021-06-12 20:06:32,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:32,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:32,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:32,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:32,812 INFO L87 Difference]: Start difference. First operand 464 states and 1447 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:33,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:33,024 INFO L93 Difference]: Finished difference Result 542 states and 1671 transitions. [2021-06-12 20:06:33,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:06:33,024 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:33,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:33,025 INFO L225 Difference]: With dead ends: 542 [2021-06-12 20:06:33,025 INFO L226 Difference]: Without dead ends: 523 [2021-06-12 20:06:33,025 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 245.4ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:06:33,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-06-12 20:06:33,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 460. [2021-06-12 20:06:33,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.1263616557734206) internal successors, (1435), 459 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:33,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1435 transitions. [2021-06-12 20:06:33,030 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1435 transitions. Word has length 21 [2021-06-12 20:06:33,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:33,030 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1435 transitions. [2021-06-12 20:06:33,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:33,030 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1435 transitions. [2021-06-12 20:06:33,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:33,030 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:33,030 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:33,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4972,876 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:33,231 INFO L430 AbstractCegarLoop]: === Iteration 888 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:33,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:33,231 INFO L82 PathProgramCache]: Analyzing trace with hash 894285847, now seen corresponding path program 876 times [2021-06-12 20:06:33,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:33,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455642422] [2021-06-12 20:06:33,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:33,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:33,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:33,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455642422] [2021-06-12 20:06:33,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455642422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:33,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242689652] [2021-06-12 20:06:33,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 877 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 877 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:33,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:06:33,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:33,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:33,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:33,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:33,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:33,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:33,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:33,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:06:33,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:28 [2021-06-12 20:06:33,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:33,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:33,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:06:33,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:33,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:06:33,462 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:33,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:33,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:33,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:06:33,479 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:33,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:33,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:33,494 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:15 [2021-06-12 20:06:33,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:33,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242689652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:33,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:33,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:06:33,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101846596] [2021-06-12 20:06:33,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:33,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:33,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:33,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:33,511 INFO L87 Difference]: Start difference. First operand 460 states and 1435 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:33,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:33,694 INFO L93 Difference]: Finished difference Result 563 states and 1733 transitions. [2021-06-12 20:06:33,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:33,694 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:33,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:33,695 INFO L225 Difference]: With dead ends: 563 [2021-06-12 20:06:33,695 INFO L226 Difference]: Without dead ends: 527 [2021-06-12 20:06:33,695 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 133.8ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:33,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-06-12 20:06:33,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 460. [2021-06-12 20:06:33,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.1263616557734206) internal successors, (1435), 459 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:33,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1435 transitions. [2021-06-12 20:06:33,708 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1435 transitions. Word has length 21 [2021-06-12 20:06:33,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:33,708 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1435 transitions. [2021-06-12 20:06:33,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:33,708 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1435 transitions. [2021-06-12 20:06:33,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:33,709 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:33,709 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:33,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4977,877 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:33,909 INFO L430 AbstractCegarLoop]: === Iteration 889 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:33,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:33,909 INFO L82 PathProgramCache]: Analyzing trace with hash -200413071, now seen corresponding path program 877 times [2021-06-12 20:06:33,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:33,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789585686] [2021-06-12 20:06:33,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:33,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:33,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:33,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:33,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789585686] [2021-06-12 20:06:33,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789585686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:33,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884489127] [2021-06-12 20:06:33,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 878 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 878 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:34,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:34,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:34,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:34,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:34,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:34,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:34,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:34,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:34,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:34,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:34,115 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:31 [2021-06-12 20:06:34,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:34,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:34,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:34,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:34,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:34,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:34,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:34,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:34,175 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:34,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:34,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:34,189 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:13 [2021-06-12 20:06:34,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:34,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884489127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:34,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:34,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:06:34,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143457198] [2021-06-12 20:06:34,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:06:34,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:34,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:06:34,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:06:34,219 INFO L87 Difference]: Start difference. First operand 460 states and 1435 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:34,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:34,413 INFO L93 Difference]: Finished difference Result 604 states and 1852 transitions. [2021-06-12 20:06:34,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:06:34,414 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:34,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:34,415 INFO L225 Difference]: With dead ends: 604 [2021-06-12 20:06:34,415 INFO L226 Difference]: Without dead ends: 577 [2021-06-12 20:06:34,415 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 177.1ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:34,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-12 20:06:34,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 475. [2021-06-12 20:06:34,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.1244725738396624) internal successors, (1481), 474 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:34,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1481 transitions. [2021-06-12 20:06:34,420 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1481 transitions. Word has length 21 [2021-06-12 20:06:34,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:34,420 INFO L482 AbstractCegarLoop]: Abstraction has 475 states and 1481 transitions. [2021-06-12 20:06:34,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:34,420 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1481 transitions. [2021-06-12 20:06:34,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:34,420 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:34,420 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:34,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4983,878 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:34,621 INFO L430 AbstractCegarLoop]: === Iteration 890 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:34,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:34,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1680339867, now seen corresponding path program 878 times [2021-06-12 20:06:34,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:34,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970788786] [2021-06-12 20:06:34,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:34,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:34,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:34,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970788786] [2021-06-12 20:06:34,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970788786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:34,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510386828] [2021-06-12 20:06:34,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 879 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 879 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:34,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:06:34,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:34,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:34,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:34,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:34,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:34,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:34,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:34,816 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:34,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:34,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:34,828 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:31 [2021-06-12 20:06:34,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:34,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:34,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:34,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:34,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:34,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:34,888 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:34,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:34,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:34,895 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:7 [2021-06-12 20:06:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:34,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510386828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:34,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:34,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:06:34,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037820665] [2021-06-12 20:06:34,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:06:34,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:34,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:06:34,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:06:34,906 INFO L87 Difference]: Start difference. First operand 475 states and 1481 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:35,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:35,048 INFO L93 Difference]: Finished difference Result 554 states and 1699 transitions. [2021-06-12 20:06:35,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:35,048 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:35,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:35,049 INFO L225 Difference]: With dead ends: 554 [2021-06-12 20:06:35,049 INFO L226 Difference]: Without dead ends: 533 [2021-06-12 20:06:35,049 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:06:35,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-12 20:06:35,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 457. [2021-06-12 20:06:35,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 3.129385964912281) internal successors, (1427), 456 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:35,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1427 transitions. [2021-06-12 20:06:35,053 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1427 transitions. Word has length 21 [2021-06-12 20:06:35,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:35,053 INFO L482 AbstractCegarLoop]: Abstraction has 457 states and 1427 transitions. [2021-06-12 20:06:35,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:35,053 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1427 transitions. [2021-06-12 20:06:35,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:35,054 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:35,054 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:35,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4994,879 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:35,254 INFO L430 AbstractCegarLoop]: === Iteration 891 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:35,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:35,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1962334387, now seen corresponding path program 879 times [2021-06-12 20:06:35,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:35,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882304501] [2021-06-12 20:06:35,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:35,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:35,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:35,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:35,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882304501] [2021-06-12 20:06:35,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882304501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:35,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176096161] [2021-06-12 20:06:35,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 880 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 880 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:35,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:06:35,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:35,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:35,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:35,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:35,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:35,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:35,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:35,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:06:35,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:31 [2021-06-12 20:06:35,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:35,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:35,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:06:35,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:35,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:06:35,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:35,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:35,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:35,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:06:35,494 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:35,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:35,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:35,511 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:65, output treesize:21 [2021-06-12 20:06:35,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:35,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176096161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:35,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:35,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:06:35,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198641810] [2021-06-12 20:06:35,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:35,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:35,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:35,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:35,546 INFO L87 Difference]: Start difference. First operand 457 states and 1427 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:35,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:35,713 INFO L93 Difference]: Finished difference Result 578 states and 1773 transitions. [2021-06-12 20:06:35,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:35,713 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:35,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:35,714 INFO L225 Difference]: With dead ends: 578 [2021-06-12 20:06:35,714 INFO L226 Difference]: Without dead ends: 542 [2021-06-12 20:06:35,714 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 135.4ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:35,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-12 20:06:35,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 458. [2021-06-12 20:06:35,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.1334792122538295) internal successors, (1432), 457 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:35,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1432 transitions. [2021-06-12 20:06:35,718 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1432 transitions. Word has length 21 [2021-06-12 20:06:35,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:35,718 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1432 transitions. [2021-06-12 20:06:35,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:35,719 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1432 transitions. [2021-06-12 20:06:35,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:35,719 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:35,719 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:35,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 880 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5000 [2021-06-12 20:06:35,919 INFO L430 AbstractCegarLoop]: === Iteration 892 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:35,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:35,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1665067977, now seen corresponding path program 880 times [2021-06-12 20:06:35,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:35,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977443376] [2021-06-12 20:06:35,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:36,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:36,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:36,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977443376] [2021-06-12 20:06:36,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977443376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:36,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943680958] [2021-06-12 20:06:36,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 881 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 881 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:36,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:06:36,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:36,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:36,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:36,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:36,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:36,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:36,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:36,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:36,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:36,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:36,107 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:06:36,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:36,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:36,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:36,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:36,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:36,153 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:36,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:36,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:36,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:36,172 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:36,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:36,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:36,189 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:67, output treesize:19 [2021-06-12 20:06:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:36,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943680958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:36,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:36,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:06:36,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278594521] [2021-06-12 20:06:36,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:06:36,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:36,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:06:36,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:06:36,213 INFO L87 Difference]: Start difference. First operand 458 states and 1432 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:36,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:36,350 INFO L93 Difference]: Finished difference Result 663 states and 2025 transitions. [2021-06-12 20:06:36,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:36,350 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:36,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:36,351 INFO L225 Difference]: With dead ends: 663 [2021-06-12 20:06:36,351 INFO L226 Difference]: Without dead ends: 640 [2021-06-12 20:06:36,351 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 145.8ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:36,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-12 20:06:36,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 473. [2021-06-12 20:06:36,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.1504237288135593) internal successors, (1487), 472 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:36,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1487 transitions. [2021-06-12 20:06:36,356 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1487 transitions. Word has length 21 [2021-06-12 20:06:36,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:36,356 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1487 transitions. [2021-06-12 20:06:36,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:36,356 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1487 transitions. [2021-06-12 20:06:36,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:36,357 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:36,357 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:36,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5006,881 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:36,557 INFO L430 AbstractCegarLoop]: === Iteration 893 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:36,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:36,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1949330661, now seen corresponding path program 881 times [2021-06-12 20:06:36,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:36,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252491134] [2021-06-12 20:06:36,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:36,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:36,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:36,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:36,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252491134] [2021-06-12 20:06:36,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252491134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:36,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225427094] [2021-06-12 20:06:36,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 882 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 882 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:36,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:06:36,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:36,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:06:36,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:36,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:36,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:36,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:36,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:36,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:36,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:36,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:36,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:36,752 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:06:36,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:36,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:36,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:36,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:36,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:36,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:36,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:36,803 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:36,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:36,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:36,807 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:36,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:36,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:36,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:36,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:36,855 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:36,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:36,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:36,858 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:36,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:36,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:06:36,903 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:149, output treesize:57 [2021-06-12 20:06:37,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:37,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225427094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:37,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:37,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:37,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292794021] [2021-06-12 20:06:37,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:37,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:37,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:37,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:37,021 INFO L87 Difference]: Start difference. First operand 473 states and 1487 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:37,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:37,653 INFO L93 Difference]: Finished difference Result 787 states and 2411 transitions. [2021-06-12 20:06:37,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:06:37,654 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:37,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:37,655 INFO L225 Difference]: With dead ends: 787 [2021-06-12 20:06:37,655 INFO L226 Difference]: Without dead ends: 739 [2021-06-12 20:06:37,655 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 539.4ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:06:37,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-06-12 20:06:37,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 491. [2021-06-12 20:06:37,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.157142857142857) internal successors, (1547), 490 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:37,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1547 transitions. [2021-06-12 20:06:37,661 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1547 transitions. Word has length 21 [2021-06-12 20:06:37,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:37,661 INFO L482 AbstractCegarLoop]: Abstraction has 491 states and 1547 transitions. [2021-06-12 20:06:37,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:37,661 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1547 transitions. [2021-06-12 20:06:37,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:37,661 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:37,661 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:37,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 882 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5013 [2021-06-12 20:06:37,862 INFO L430 AbstractCegarLoop]: === Iteration 894 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:37,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:37,862 INFO L82 PathProgramCache]: Analyzing trace with hash 384889669, now seen corresponding path program 882 times [2021-06-12 20:06:37,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:37,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093587826] [2021-06-12 20:06:37,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:37,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:37,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:37,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093587826] [2021-06-12 20:06:37,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093587826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:37,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639554315] [2021-06-12 20:06:37,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 883 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 883 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:37,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:06:37,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:37,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:37,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:38,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:38,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:38,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:38,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:38,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:38,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:38,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:38,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:38,069 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:06:38,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:38,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:38,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:38,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:38,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:38,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:38,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:38,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:38,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:38,144 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:10 [2021-06-12 20:06:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:38,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639554315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:38,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:38,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:38,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32889468] [2021-06-12 20:06:38,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:38,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:38,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:38,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:38,191 INFO L87 Difference]: Start difference. First operand 491 states and 1547 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:38,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:38,414 INFO L93 Difference]: Finished difference Result 669 states and 2060 transitions. [2021-06-12 20:06:38,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:06:38,414 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:38,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:38,415 INFO L225 Difference]: With dead ends: 669 [2021-06-12 20:06:38,415 INFO L226 Difference]: Without dead ends: 650 [2021-06-12 20:06:38,415 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 249.9ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:06:38,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-06-12 20:06:38,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 477. [2021-06-12 20:06:38,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.1470588235294117) internal successors, (1498), 476 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:38,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1498 transitions. [2021-06-12 20:06:38,420 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1498 transitions. Word has length 21 [2021-06-12 20:06:38,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:38,420 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1498 transitions. [2021-06-12 20:06:38,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:38,420 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1498 transitions. [2021-06-12 20:06:38,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:38,421 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:38,421 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:38,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5027,883 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:38,621 INFO L430 AbstractCegarLoop]: === Iteration 895 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:38,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:38,622 INFO L82 PathProgramCache]: Analyzing trace with hash 930262323, now seen corresponding path program 883 times [2021-06-12 20:06:38,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:38,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10654420] [2021-06-12 20:06:38,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:38,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:38,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:38,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10654420] [2021-06-12 20:06:38,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10654420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:38,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116617181] [2021-06-12 20:06:38,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 884 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 884 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:38,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:38,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:38,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:38,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:38,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:38,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:38,797 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:38,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:38,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:38,812 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:06:38,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:38,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:38,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:38,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:38,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:38,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:38,922 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:38,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:38,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:38,930 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:7 [2021-06-12 20:06:38,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:38,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116617181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:38,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:38,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:06:38,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952036722] [2021-06-12 20:06:38,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:06:38,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:38,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:06:38,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:06:38,940 INFO L87 Difference]: Start difference. First operand 477 states and 1498 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:39,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:39,095 INFO L93 Difference]: Finished difference Result 585 states and 1788 transitions. [2021-06-12 20:06:39,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:39,096 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:39,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:39,096 INFO L225 Difference]: With dead ends: 585 [2021-06-12 20:06:39,096 INFO L226 Difference]: Without dead ends: 564 [2021-06-12 20:06:39,096 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 186.2ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:06:39,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-06-12 20:06:39,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 473. [2021-06-12 20:06:39,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.1483050847457625) internal successors, (1486), 472 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:39,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1486 transitions. [2021-06-12 20:06:39,101 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1486 transitions. Word has length 21 [2021-06-12 20:06:39,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:39,101 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1486 transitions. [2021-06-12 20:06:39,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:39,101 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1486 transitions. [2021-06-12 20:06:39,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:39,102 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:39,102 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:39,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5031,884 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:39,302 INFO L430 AbstractCegarLoop]: === Iteration 896 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:39,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:39,303 INFO L82 PathProgramCache]: Analyzing trace with hash -788722359, now seen corresponding path program 884 times [2021-06-12 20:06:39,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:39,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334172586] [2021-06-12 20:06:39,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:39,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:39,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:39,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334172586] [2021-06-12 20:06:39,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334172586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:39,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056254636] [2021-06-12 20:06:39,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 885 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 885 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:39,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:06:39,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:39,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:39,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:39,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:39,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:39,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:39,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:39,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:39,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:39,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:39,509 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:06:39,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:39,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:39,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:39,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:39,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:39,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:39,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:39,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:39,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:39,585 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:10 [2021-06-12 20:06:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:39,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056254636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:39,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:39,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:39,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485064045] [2021-06-12 20:06:39,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:39,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:39,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:39,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:39,636 INFO L87 Difference]: Start difference. First operand 473 states and 1486 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:39,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:39,843 INFO L93 Difference]: Finished difference Result 643 states and 1974 transitions. [2021-06-12 20:06:39,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:06:39,843 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:39,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:39,844 INFO L225 Difference]: With dead ends: 643 [2021-06-12 20:06:39,844 INFO L226 Difference]: Without dead ends: 622 [2021-06-12 20:06:39,844 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 220.5ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:06:39,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-06-12 20:06:39,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 456. [2021-06-12 20:06:39,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.1274725274725275) internal successors, (1423), 455 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:39,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1423 transitions. [2021-06-12 20:06:39,850 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1423 transitions. Word has length 21 [2021-06-12 20:06:39,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:39,850 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1423 transitions. [2021-06-12 20:06:39,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:39,850 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1423 transitions. [2021-06-12 20:06:39,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:39,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:39,851 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:40,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 885 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5040 [2021-06-12 20:06:40,052 INFO L430 AbstractCegarLoop]: === Iteration 897 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:40,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:40,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1952062537, now seen corresponding path program 885 times [2021-06-12 20:06:40,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:40,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445156450] [2021-06-12 20:06:40,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:40,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:40,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:40,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445156450] [2021-06-12 20:06:40,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445156450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:40,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31257694] [2021-06-12 20:06:40,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 886 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 886 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:40,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:06:40,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:40,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:40,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:40,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:40,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:40,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:40,219 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:40,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:40,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:40,235 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:06:40,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:40,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:40,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:40,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:40,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:40,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:06:40,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:40,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:40,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:40,306 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:12 [2021-06-12 20:06:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:40,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31257694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:40,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:40,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:06:40,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312181171] [2021-06-12 20:06:40,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:40,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:40,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:40,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:40,320 INFO L87 Difference]: Start difference. First operand 456 states and 1423 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:40,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:40,495 INFO L93 Difference]: Finished difference Result 542 states and 1672 transitions. [2021-06-12 20:06:40,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:40,495 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:40,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:40,496 INFO L225 Difference]: With dead ends: 542 [2021-06-12 20:06:40,497 INFO L226 Difference]: Without dead ends: 520 [2021-06-12 20:06:40,497 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 137.5ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:40,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-12 20:06:40,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 462. [2021-06-12 20:06:40,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.1323210412147504) internal successors, (1444), 461 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:40,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1444 transitions. [2021-06-12 20:06:40,508 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1444 transitions. Word has length 21 [2021-06-12 20:06:40,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:40,508 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1444 transitions. [2021-06-12 20:06:40,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:40,508 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1444 transitions. [2021-06-12 20:06:40,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:40,509 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:40,509 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:40,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 886 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5046 [2021-06-12 20:06:40,725 INFO L430 AbstractCegarLoop]: === Iteration 898 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:40,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:40,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1326738419, now seen corresponding path program 886 times [2021-06-12 20:06:40,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:40,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759622733] [2021-06-12 20:06:40,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:40,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:40,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:40,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:40,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759622733] [2021-06-12 20:06:40,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759622733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:40,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108641674] [2021-06-12 20:06:40,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 887 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 887 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:40,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:06:40,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:40,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:40,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:40,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:40,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:40,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:40,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:06:40,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 20:06:40,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:40,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:40,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:40,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:40,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:06:40,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:40,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:40,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:40,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:40,982 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:40,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:40,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:40,994 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:13 [2021-06-12 20:06:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:41,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108641674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:41,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:41,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:41,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965681589] [2021-06-12 20:06:41,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:41,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:41,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:41,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:41,041 INFO L87 Difference]: Start difference. First operand 462 states and 1444 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:41,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:41,280 INFO L93 Difference]: Finished difference Result 626 states and 1930 transitions. [2021-06-12 20:06:41,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:06:41,281 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:41,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:41,281 INFO L225 Difference]: With dead ends: 626 [2021-06-12 20:06:41,282 INFO L226 Difference]: Without dead ends: 599 [2021-06-12 20:06:41,282 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 233.3ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:06:41,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-06-12 20:06:41,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 462. [2021-06-12 20:06:41,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.1279826464208242) internal successors, (1442), 461 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:41,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1442 transitions. [2021-06-12 20:06:41,287 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1442 transitions. Word has length 21 [2021-06-12 20:06:41,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:41,287 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1442 transitions. [2021-06-12 20:06:41,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:41,287 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1442 transitions. [2021-06-12 20:06:41,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:41,287 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:41,287 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:41,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 887 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5051 [2021-06-12 20:06:41,488 INFO L430 AbstractCegarLoop]: === Iteration 899 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:41,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:41,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1611001103, now seen corresponding path program 887 times [2021-06-12 20:06:41,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:41,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216658772] [2021-06-12 20:06:41,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:41,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:41,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216658772] [2021-06-12 20:06:41,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216658772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:41,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687501441] [2021-06-12 20:06:41,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 888 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 888 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:41,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:06:41,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:41,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:41,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:41,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:41,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:41,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:41,676 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:41,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:41,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:41,692 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:06:41,768 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_258, v_prenex_259], 1=[o_0, o_2]} [2021-06-12 20:06:41,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:41,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:41,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:41,781 INFO L518 ElimStorePlain]: Eliminatee v_prenex_259 vanished before elimination [2021-06-12 20:06:41,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:41,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:41,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:41,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:41,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:41,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:41,794 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:41,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:41,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:41,803 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:43, output treesize:13 [2021-06-12 20:06:41,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:41,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687501441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:41,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:41,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:41,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442516838] [2021-06-12 20:06:41,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:41,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:41,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:41,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:41,854 INFO L87 Difference]: Start difference. First operand 462 states and 1442 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:42,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:42,094 INFO L93 Difference]: Finished difference Result 684 states and 2097 transitions. [2021-06-12 20:06:42,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:06:42,095 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:42,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:42,095 INFO L225 Difference]: With dead ends: 684 [2021-06-12 20:06:42,096 INFO L226 Difference]: Without dead ends: 657 [2021-06-12 20:06:42,096 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 230.4ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:06:42,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-06-12 20:06:42,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 476. [2021-06-12 20:06:42,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.126315789473684) internal successors, (1485), 475 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:42,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1485 transitions. [2021-06-12 20:06:42,101 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1485 transitions. Word has length 21 [2021-06-12 20:06:42,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:42,101 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1485 transitions. [2021-06-12 20:06:42,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:42,101 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1485 transitions. [2021-06-12 20:06:42,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:42,102 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:42,102 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:42,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5059,888 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:42,302 INFO L430 AbstractCegarLoop]: === Iteration 900 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:42,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:42,302 INFO L82 PathProgramCache]: Analyzing trace with hash 75390737, now seen corresponding path program 888 times [2021-06-12 20:06:42,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:42,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519116440] [2021-06-12 20:06:42,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:42,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:42,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:42,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519116440] [2021-06-12 20:06:42,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519116440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:42,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912849742] [2021-06-12 20:06:42,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 889 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 889 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:42,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:06:42,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:42,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:42,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:42,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:42,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:42,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:42,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:42,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:42,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:42,522 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:06:42,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:42,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:42,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:42,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:42,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:42,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:42,621 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:42,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:42,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:42,626 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:28, output treesize:7 [2021-06-12 20:06:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:42,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912849742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:42,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:42,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:42,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833358058] [2021-06-12 20:06:42,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:42,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:42,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:42,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:42,656 INFO L87 Difference]: Start difference. First operand 476 states and 1485 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:42,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:42,875 INFO L93 Difference]: Finished difference Result 644 states and 1974 transitions. [2021-06-12 20:06:42,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:06:42,876 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:42,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:42,877 INFO L225 Difference]: With dead ends: 644 [2021-06-12 20:06:42,877 INFO L226 Difference]: Without dead ends: 623 [2021-06-12 20:06:42,877 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 247.6ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:06:42,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-06-12 20:06:42,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 477. [2021-06-12 20:06:42,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.134453781512605) internal successors, (1492), 476 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:42,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1492 transitions. [2021-06-12 20:06:42,882 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1492 transitions. Word has length 21 [2021-06-12 20:06:42,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:42,882 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1492 transitions. [2021-06-12 20:06:42,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:42,882 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1492 transitions. [2021-06-12 20:06:42,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:42,882 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:42,882 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:43,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5074,889 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:43,083 INFO L430 AbstractCegarLoop]: === Iteration 901 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:43,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:43,083 INFO L82 PathProgramCache]: Analyzing trace with hash 97895109, now seen corresponding path program 889 times [2021-06-12 20:06:43,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:43,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959992738] [2021-06-12 20:06:43,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:43,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:43,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:43,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959992738] [2021-06-12 20:06:43,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959992738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:43,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341055099] [2021-06-12 20:06:43,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 890 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 890 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:43,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:43,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:43,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:43,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:43,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:43,260 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:43,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:43,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:43,276 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:06:43,308 INFO L446 ElimStorePlain]: Different costs {0=[o_0, o_2], 1=[v_prenex_260, v_prenex_261]} [2021-06-12 20:06:43,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:43,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:43,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:43,324 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:06:43,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:43,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:43,326 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:43,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:43,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:43,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:06:43,339 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:43,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:43,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:43,350 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:51, output treesize:21 [2021-06-12 20:06:43,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:43,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341055099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:43,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:43,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:06:43,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772400593] [2021-06-12 20:06:43,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:43,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:43,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:43,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:43,385 INFO L87 Difference]: Start difference. First operand 477 states and 1492 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:43,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:43,543 INFO L93 Difference]: Finished difference Result 604 states and 1867 transitions. [2021-06-12 20:06:43,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:43,543 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:43,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:43,544 INFO L225 Difference]: With dead ends: 604 [2021-06-12 20:06:43,544 INFO L226 Difference]: Without dead ends: 575 [2021-06-12 20:06:43,544 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:43,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-06-12 20:06:43,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 477. [2021-06-12 20:06:43,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.134453781512605) internal successors, (1492), 476 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:43,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1492 transitions. [2021-06-12 20:06:43,549 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1492 transitions. Word has length 21 [2021-06-12 20:06:43,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:43,549 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1492 transitions. [2021-06-12 20:06:43,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:43,549 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1492 transitions. [2021-06-12 20:06:43,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:43,550 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:43,550 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:43,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 890 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5084 [2021-06-12 20:06:43,750 INFO L430 AbstractCegarLoop]: === Iteration 902 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:43,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:43,750 INFO L82 PathProgramCache]: Analyzing trace with hash 395161519, now seen corresponding path program 890 times [2021-06-12 20:06:43,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:43,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347135416] [2021-06-12 20:06:43,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:43,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:43,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:43,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347135416] [2021-06-12 20:06:43,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347135416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:43,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695937418] [2021-06-12 20:06:43,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 891 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 891 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:43,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:06:43,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:43,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:43,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:43,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:43,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:43,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:43,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:06:43,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 20:06:43,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:43,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:43,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:43,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:43,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:06:43,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:43,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:43,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:43,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:43,986 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:44,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:44,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:44,006 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:65, output treesize:19 [2021-06-12 20:06:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:44,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695937418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:44,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:44,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:44,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804882451] [2021-06-12 20:06:44,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:44,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:44,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:44,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:44,078 INFO L87 Difference]: Start difference. First operand 477 states and 1492 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:44,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:44,384 INFO L93 Difference]: Finished difference Result 648 states and 1997 transitions. [2021-06-12 20:06:44,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:06:44,384 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:44,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:44,385 INFO L225 Difference]: With dead ends: 648 [2021-06-12 20:06:44,385 INFO L226 Difference]: Without dead ends: 625 [2021-06-12 20:06:44,385 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 293.5ms TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:06:44,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-06-12 20:06:44,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 476. [2021-06-12 20:06:44,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.143157894736842) internal successors, (1493), 475 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:44,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1493 transitions. [2021-06-12 20:06:44,390 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1493 transitions. Word has length 21 [2021-06-12 20:06:44,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:44,390 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1493 transitions. [2021-06-12 20:06:44,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:44,390 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1493 transitions. [2021-06-12 20:06:44,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:44,390 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:44,391 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:44,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5091,891 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:44,591 INFO L430 AbstractCegarLoop]: === Iteration 903 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:44,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:44,591 INFO L82 PathProgramCache]: Analyzing trace with hash 110898835, now seen corresponding path program 891 times [2021-06-12 20:06:44,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:44,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478198622] [2021-06-12 20:06:44,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:44,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:44,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:44,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478198622] [2021-06-12 20:06:44,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478198622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:44,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927180648] [2021-06-12 20:06:44,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 892 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 892 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:44,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:06:44,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:44,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:44,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:44,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:44,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:44,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:44,775 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:44,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:44,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:44,791 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:06:44,828 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_262, v_prenex_263], 1=[o_0, o_2]} [2021-06-12 20:06:44,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:44,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:44,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:44,849 INFO L518 ElimStorePlain]: Eliminatee v_prenex_263 vanished before elimination [2021-06-12 20:06:44,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:44,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:44,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:44,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:44,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:44,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:44,865 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:44,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:44,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:44,876 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:51, output treesize:19 [2021-06-12 20:06:44,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:44,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927180648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:44,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:44,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:44,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226807675] [2021-06-12 20:06:44,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:44,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:44,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:44,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:44,952 INFO L87 Difference]: Start difference. First operand 476 states and 1493 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:45,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:45,230 INFO L93 Difference]: Finished difference Result 708 states and 2159 transitions. [2021-06-12 20:06:45,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:06:45,230 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:45,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:45,231 INFO L225 Difference]: With dead ends: 708 [2021-06-12 20:06:45,231 INFO L226 Difference]: Without dead ends: 681 [2021-06-12 20:06:45,232 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 225.1ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:06:45,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-06-12 20:06:45,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 479. [2021-06-12 20:06:45,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.1527196652719667) internal successors, (1507), 478 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:45,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1507 transitions. [2021-06-12 20:06:45,237 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1507 transitions. Word has length 21 [2021-06-12 20:06:45,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:45,237 INFO L482 AbstractCegarLoop]: Abstraction has 479 states and 1507 transitions. [2021-06-12 20:06:45,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:45,237 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1507 transitions. [2021-06-12 20:06:45,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:45,238 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:45,238 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:45,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5098,892 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:45,438 INFO L430 AbstractCegarLoop]: === Iteration 904 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:45,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:45,438 INFO L82 PathProgramCache]: Analyzing trace with hash -2108378671, now seen corresponding path program 892 times [2021-06-12 20:06:45,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:45,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581488818] [2021-06-12 20:06:45,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:45,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:45,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:45,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581488818] [2021-06-12 20:06:45,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581488818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:45,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990471056] [2021-06-12 20:06:45,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 893 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 893 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:45,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:06:45,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:45,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:45,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:45,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:45,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:45,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:45,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:45,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:45,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:45,639 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:06:45,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:45,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:45,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:45,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:45,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:45,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:45,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:45,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:45,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:45,711 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:10 [2021-06-12 20:06:45,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:45,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990471056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:45,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:45,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:45,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471501386] [2021-06-12 20:06:45,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:45,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:45,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:45,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:45,756 INFO L87 Difference]: Start difference. First operand 479 states and 1507 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:46,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:46,000 INFO L93 Difference]: Finished difference Result 661 states and 2035 transitions. [2021-06-12 20:06:46,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:06:46,000 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:46,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:46,001 INFO L225 Difference]: With dead ends: 661 [2021-06-12 20:06:46,001 INFO L226 Difference]: Without dead ends: 640 [2021-06-12 20:06:46,001 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 209.5ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:06:46,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-12 20:06:46,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 475. [2021-06-12 20:06:46,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.1434599156118144) internal successors, (1490), 474 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:46,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1490 transitions. [2021-06-12 20:06:46,006 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1490 transitions. Word has length 21 [2021-06-12 20:06:46,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:46,006 INFO L482 AbstractCegarLoop]: Abstraction has 475 states and 1490 transitions. [2021-06-12 20:06:46,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:46,007 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1490 transitions. [2021-06-12 20:06:46,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:46,007 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:46,007 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:46,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 893 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5110 [2021-06-12 20:06:46,208 INFO L430 AbstractCegarLoop]: === Iteration 905 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:46,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:46,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1795140053, now seen corresponding path program 893 times [2021-06-12 20:06:46,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:46,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447170847] [2021-06-12 20:06:46,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:46,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:46,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:46,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:46,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447170847] [2021-06-12 20:06:46,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447170847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:46,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915613657] [2021-06-12 20:06:46,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 894 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 894 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:46,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:06:46,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:46,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:46,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:46,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:46,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:46,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:46,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:46,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:46,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:25 [2021-06-12 20:06:46,400 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-12 20:06:46,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:06:46,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:46,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:06:46,406 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:46,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:46,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:46,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:06:46,424 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:46,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:46,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:46,439 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:59, output treesize:21 [2021-06-12 20:06:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:46,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915613657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:46,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:46,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:06:46,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201904009] [2021-06-12 20:06:46,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:46,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:46,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:46,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:46,473 INFO L87 Difference]: Start difference. First operand 475 states and 1490 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:46,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:46,629 INFO L93 Difference]: Finished difference Result 578 states and 1788 transitions. [2021-06-12 20:06:46,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:46,629 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:46,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:46,630 INFO L225 Difference]: With dead ends: 578 [2021-06-12 20:06:46,630 INFO L226 Difference]: Without dead ends: 542 [2021-06-12 20:06:46,630 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 137.9ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:46,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-12 20:06:46,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 476. [2021-06-12 20:06:46,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.1473684210526316) internal successors, (1495), 475 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:46,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1495 transitions. [2021-06-12 20:06:46,635 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1495 transitions. Word has length 21 [2021-06-12 20:06:46,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:46,635 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1495 transitions. [2021-06-12 20:06:46,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:46,635 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1495 transitions. [2021-06-12 20:06:46,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:46,636 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:46,636 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:46,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5114,894 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:46,836 INFO L430 AbstractCegarLoop]: === Iteration 906 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:46,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:46,836 INFO L82 PathProgramCache]: Analyzing trace with hash 2092406463, now seen corresponding path program 894 times [2021-06-12 20:06:46,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:46,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079283295] [2021-06-12 20:06:46,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:46,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:46,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079283295] [2021-06-12 20:06:46,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079283295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:46,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613433201] [2021-06-12 20:06:46,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 895 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 895 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:46,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:06:46,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:46,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:46,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:47,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:47,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:47,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:47,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:47,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:47,025 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:47,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:47,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:47,042 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:38 [2021-06-12 20:06:47,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:47,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:47,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:47,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:47,091 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:47,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:47,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:47,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:47,114 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:47,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:47,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:47,130 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:66, output treesize:19 [2021-06-12 20:06:47,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:47,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613433201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:47,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:47,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:47,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089622625] [2021-06-12 20:06:47,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:47,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:47,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:47,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:47,204 INFO L87 Difference]: Start difference. First operand 476 states and 1495 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:47,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:47,556 INFO L93 Difference]: Finished difference Result 682 states and 2098 transitions. [2021-06-12 20:06:47,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:06:47,556 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:47,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:47,557 INFO L225 Difference]: With dead ends: 682 [2021-06-12 20:06:47,557 INFO L226 Difference]: Without dead ends: 659 [2021-06-12 20:06:47,557 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 294.7ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:06:47,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-06-12 20:06:47,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 491. [2021-06-12 20:06:47,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.163265306122449) internal successors, (1550), 490 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:47,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1550 transitions. [2021-06-12 20:06:47,563 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1550 transitions. Word has length 21 [2021-06-12 20:06:47,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:47,563 INFO L482 AbstractCegarLoop]: Abstraction has 491 states and 1550 transitions. [2021-06-12 20:06:47,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:47,563 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1550 transitions. [2021-06-12 20:06:47,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:47,563 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:47,563 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:47,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 895 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5118 [2021-06-12 20:06:47,764 INFO L430 AbstractCegarLoop]: === Iteration 907 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:47,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:47,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1808143779, now seen corresponding path program 895 times [2021-06-12 20:06:47,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:47,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388317108] [2021-06-12 20:06:47,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:47,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:47,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388317108] [2021-06-12 20:06:47,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388317108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:47,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274129041] [2021-06-12 20:06:47,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 896 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 896 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:47,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:47,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:47,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:47,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:47,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:47,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:47,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:47,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:47,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:47,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:47,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:47,953 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:47, output treesize:31 [2021-06-12 20:06:47,982 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-12 20:06:47,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:47,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:47,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:47,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:48,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:48,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:48,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:48,006 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:48,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:48,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:48,021 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:59, output treesize:19 [2021-06-12 20:06:48,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:48,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274129041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:48,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:48,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:48,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756986902] [2021-06-12 20:06:48,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:48,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:48,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:48,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:48,096 INFO L87 Difference]: Start difference. First operand 491 states and 1550 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:48,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:48,362 INFO L93 Difference]: Finished difference Result 709 states and 2187 transitions. [2021-06-12 20:06:48,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:06:48,363 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:48,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:48,363 INFO L225 Difference]: With dead ends: 709 [2021-06-12 20:06:48,364 INFO L226 Difference]: Without dead ends: 682 [2021-06-12 20:06:48,364 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 220.2ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:06:48,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-06-12 20:06:48,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 497. [2021-06-12 20:06:48,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.161290322580645) internal successors, (1568), 496 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:48,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1568 transitions. [2021-06-12 20:06:48,369 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1568 transitions. Word has length 21 [2021-06-12 20:06:48,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:48,369 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1568 transitions. [2021-06-12 20:06:48,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:48,369 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1568 transitions. [2021-06-12 20:06:48,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:48,370 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:48,370 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:48,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5127,896 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:48,571 INFO L430 AbstractCegarLoop]: === Iteration 908 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:48,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:48,571 INFO L82 PathProgramCache]: Analyzing trace with hash -152603187, now seen corresponding path program 896 times [2021-06-12 20:06:48,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:48,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558411070] [2021-06-12 20:06:48,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:48,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:48,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:48,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558411070] [2021-06-12 20:06:48,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558411070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:48,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367279938] [2021-06-12 20:06:48,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 897 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 897 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:48,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:06:48,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:48,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:48,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:48,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:48,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:48,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:48,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:48,818 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:48,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:48,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:48,838 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:38 [2021-06-12 20:06:48,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:48,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:48,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:48,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:48,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:48,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:48,912 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:48,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:48,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:48,919 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:10 [2021-06-12 20:06:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:48,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367279938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:48,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:48,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:06:48,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666718668] [2021-06-12 20:06:48,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:48,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:48,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:48,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:48,938 INFO L87 Difference]: Start difference. First operand 497 states and 1568 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:49,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:49,078 INFO L93 Difference]: Finished difference Result 584 states and 1806 transitions. [2021-06-12 20:06:49,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:49,079 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:49,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:49,080 INFO L225 Difference]: With dead ends: 584 [2021-06-12 20:06:49,080 INFO L226 Difference]: Without dead ends: 565 [2021-06-12 20:06:49,080 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 176.8ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:49,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-12 20:06:49,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 481. [2021-06-12 20:06:49,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.154166666666667) internal successors, (1514), 480 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:49,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1514 transitions. [2021-06-12 20:06:49,085 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1514 transitions. Word has length 21 [2021-06-12 20:06:49,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:49,085 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1514 transitions. [2021-06-12 20:06:49,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:49,085 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1514 transitions. [2021-06-12 20:06:49,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:49,086 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:49,086 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:49,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5138,897 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:49,286 INFO L430 AbstractCegarLoop]: === Iteration 909 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:49,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:49,286 INFO L82 PathProgramCache]: Analyzing trace with hash 392769467, now seen corresponding path program 897 times [2021-06-12 20:06:49,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:49,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61239370] [2021-06-12 20:06:49,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:49,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:49,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:49,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61239370] [2021-06-12 20:06:49,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61239370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:49,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595494130] [2021-06-12 20:06:49,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 898 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 898 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:49,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:06:49,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:49,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:49,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:49,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:49,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:49,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:49,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:49,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:49,463 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:49,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:49,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:49,475 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:47, output treesize:31 [2021-06-12 20:06:49,541 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-12 20:06:49,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:49,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:49,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:49,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:49,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:49,551 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:49,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:49,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:49,556 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:7 [2021-06-12 20:06:49,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:49,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595494130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:49,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:49,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:06:49,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680643370] [2021-06-12 20:06:49,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:06:49,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:49,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:06:49,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:06:49,567 INFO L87 Difference]: Start difference. First operand 481 states and 1514 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:49,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:49,740 INFO L93 Difference]: Finished difference Result 593 states and 1825 transitions. [2021-06-12 20:06:49,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:49,740 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:49,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:49,741 INFO L225 Difference]: With dead ends: 593 [2021-06-12 20:06:49,741 INFO L226 Difference]: Without dead ends: 572 [2021-06-12 20:06:49,741 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 185.8ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:06:49,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-12 20:06:49,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 481. [2021-06-12 20:06:49,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.1625) internal successors, (1518), 480 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:49,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1518 transitions. [2021-06-12 20:06:49,746 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1518 transitions. Word has length 21 [2021-06-12 20:06:49,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:49,746 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1518 transitions. [2021-06-12 20:06:49,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:49,746 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1518 transitions. [2021-06-12 20:06:49,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:49,747 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:49,747 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:49,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5142,898 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:49,947 INFO L430 AbstractCegarLoop]: === Iteration 910 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:49,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:49,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1326215215, now seen corresponding path program 898 times [2021-06-12 20:06:49,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:49,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511686882] [2021-06-12 20:06:49,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:50,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:50,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511686882] [2021-06-12 20:06:50,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511686882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:50,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097155262] [2021-06-12 20:06:50,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 899 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 899 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:50,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:06:50,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:50,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:50,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:50,138 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_264], 1=[o_2]} [2021-06-12 20:06:50,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:50,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:50,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:50,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:50,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:50,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:50,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:50,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:06:50,171 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:50, output treesize:34 [2021-06-12 20:06:50,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:50,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:50,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:50,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:50,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:50,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:50,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:50,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:50,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:50,254 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:10 [2021-06-12 20:06:50,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:50,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097155262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:50,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:50,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:50,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593920489] [2021-06-12 20:06:50,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:50,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:50,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:50,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:50,302 INFO L87 Difference]: Start difference. First operand 481 states and 1518 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:50,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:50,553 INFO L93 Difference]: Finished difference Result 673 states and 2072 transitions. [2021-06-12 20:06:50,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:06:50,554 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:50,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:50,555 INFO L225 Difference]: With dead ends: 673 [2021-06-12 20:06:50,555 INFO L226 Difference]: Without dead ends: 652 [2021-06-12 20:06:50,555 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 237.9ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:06:50,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-12 20:06:50,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 477. [2021-06-12 20:06:50,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.153361344537815) internal successors, (1501), 476 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:50,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1501 transitions. [2021-06-12 20:06:50,560 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1501 transitions. Word has length 21 [2021-06-12 20:06:50,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:50,560 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1501 transitions. [2021-06-12 20:06:50,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:50,560 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1501 transitions. [2021-06-12 20:06:50,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:50,560 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:50,561 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:50,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5148,899 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:50,761 INFO L430 AbstractCegarLoop]: === Iteration 911 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:50,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:50,761 INFO L82 PathProgramCache]: Analyzing trace with hash 70171963, now seen corresponding path program 899 times [2021-06-12 20:06:50,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:50,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803587230] [2021-06-12 20:06:50,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:50,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:50,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803587230] [2021-06-12 20:06:50,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803587230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:50,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298962895] [2021-06-12 20:06:50,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 900 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 900 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:50,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:06:50,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:50,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:50,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:50,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:50,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:50,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:50,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:06:50,957 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-06-12 20:06:51,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:51,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:51,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:51,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:51,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:51,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:51,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:51,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:51,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:51,021 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:28, output treesize:7 [2021-06-12 20:06:51,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:51,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298962895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:51,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:51,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:51,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734918744] [2021-06-12 20:06:51,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:51,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:51,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:51,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:51,051 INFO L87 Difference]: Start difference. First operand 477 states and 1501 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:51,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:51,263 INFO L93 Difference]: Finished difference Result 660 states and 2036 transitions. [2021-06-12 20:06:51,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:06:51,263 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:51,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:51,264 INFO L225 Difference]: With dead ends: 660 [2021-06-12 20:06:51,264 INFO L226 Difference]: Without dead ends: 639 [2021-06-12 20:06:51,264 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 197.2ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:06:51,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-06-12 20:06:51,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 479. [2021-06-12 20:06:51,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.1506276150627617) internal successors, (1506), 478 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:51,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1506 transitions. [2021-06-12 20:06:51,269 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1506 transitions. Word has length 21 [2021-06-12 20:06:51,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:51,269 INFO L482 AbstractCegarLoop]: Abstraction has 479 states and 1506 transitions. [2021-06-12 20:06:51,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:51,269 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1506 transitions. [2021-06-12 20:06:51,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:51,270 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:51,270 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:51,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 900 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5153 [2021-06-12 20:06:51,484 INFO L430 AbstractCegarLoop]: === Iteration 912 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:51,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:51,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1259756199, now seen corresponding path program 900 times [2021-06-12 20:06:51,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:51,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562392145] [2021-06-12 20:06:51,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:51,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:51,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:51,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562392145] [2021-06-12 20:06:51,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562392145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:51,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775682876] [2021-06-12 20:06:51,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 901 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 901 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:51,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:06:51,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:51,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:51,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:51,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:51,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:51,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:51,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:06:51,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-06-12 20:06:51,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:51,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:51,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:51,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:51,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:51,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:51,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:51,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:51,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:51,709 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:10 [2021-06-12 20:06:51,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:51,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775682876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:51,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:51,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:06:51,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856968127] [2021-06-12 20:06:51,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:51,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:51,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:51,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:51,724 INFO L87 Difference]: Start difference. First operand 479 states and 1506 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:51,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:51,883 INFO L93 Difference]: Finished difference Result 574 states and 1774 transitions. [2021-06-12 20:06:51,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:51,883 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:51,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:51,884 INFO L225 Difference]: With dead ends: 574 [2021-06-12 20:06:51,884 INFO L226 Difference]: Without dead ends: 553 [2021-06-12 20:06:51,884 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:51,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-12 20:06:51,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 476. [2021-06-12 20:06:51,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.1452631578947368) internal successors, (1494), 475 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:51,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1494 transitions. [2021-06-12 20:06:51,889 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1494 transitions. Word has length 21 [2021-06-12 20:06:51,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:51,889 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1494 transitions. [2021-06-12 20:06:51,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:51,889 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1494 transitions. [2021-06-12 20:06:51,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:51,890 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:51,890 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:52,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5159,901 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:52,090 INFO L430 AbstractCegarLoop]: === Iteration 913 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:52,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:52,091 INFO L82 PathProgramCache]: Analyzing trace with hash 2120129609, now seen corresponding path program 901 times [2021-06-12 20:06:52,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:52,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649631563] [2021-06-12 20:06:52,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:52,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:52,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:52,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649631563] [2021-06-12 20:06:52,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649631563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:52,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059534555] [2021-06-12 20:06:52,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 902 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 902 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:52,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:52,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:52,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:52,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:52,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:52,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:52,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:52,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:06:52,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2021-06-12 20:06:52,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:52,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:52,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:52,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:52,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:52,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:06:52,353 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:52,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:52,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:52,361 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:10 [2021-06-12 20:06:52,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:52,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059534555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:52,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:52,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:06:52,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846019255] [2021-06-12 20:06:52,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:06:52,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:52,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:06:52,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:52,407 INFO L87 Difference]: Start difference. First operand 476 states and 1494 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:52,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:52,618 INFO L93 Difference]: Finished difference Result 652 states and 2000 transitions. [2021-06-12 20:06:52,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:06:52,618 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:52,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:52,619 INFO L225 Difference]: With dead ends: 652 [2021-06-12 20:06:52,619 INFO L226 Difference]: Without dead ends: 631 [2021-06-12 20:06:52,619 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 216.6ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:06:52,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-12 20:06:52,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 455. [2021-06-12 20:06:52,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.1277533039647576) internal successors, (1420), 454 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:52,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1420 transitions. [2021-06-12 20:06:52,625 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1420 transitions. Word has length 21 [2021-06-12 20:06:52,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:52,625 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1420 transitions. [2021-06-12 20:06:52,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:52,625 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1420 transitions. [2021-06-12 20:06:52,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:52,625 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:52,625 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:52,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 902 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5161 [2021-06-12 20:06:52,826 INFO L430 AbstractCegarLoop]: === Iteration 914 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:52,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:52,826 INFO L82 PathProgramCache]: Analyzing trace with hash -347218005, now seen corresponding path program 902 times [2021-06-12 20:06:52,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:52,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878342163] [2021-06-12 20:06:52,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:52,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:52,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:52,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878342163] [2021-06-12 20:06:52,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878342163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:52,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327074506] [2021-06-12 20:06:52,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 903 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 903 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:52,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:06:52,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:52,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:52,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:52,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:52,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:52,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:52,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:52,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:52,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:52,946 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:06:52,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:52,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:52,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:52,968 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:06:52,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:52,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:06:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:52,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327074506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:52,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:52,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:06:52,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781642689] [2021-06-12 20:06:52,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:06:52,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:52,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:06:52,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:06:52,982 INFO L87 Difference]: Start difference. First operand 455 states and 1420 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:53,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:53,114 INFO L93 Difference]: Finished difference Result 757 states and 2307 transitions. [2021-06-12 20:06:53,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:53,114 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:53,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:53,115 INFO L225 Difference]: With dead ends: 757 [2021-06-12 20:06:53,115 INFO L226 Difference]: Without dead ends: 735 [2021-06-12 20:06:53,115 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:06:53,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2021-06-12 20:06:53,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 461. [2021-06-12 20:06:53,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.132608695652174) internal successors, (1441), 460 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:53,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1441 transitions. [2021-06-12 20:06:53,121 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1441 transitions. Word has length 21 [2021-06-12 20:06:53,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:53,121 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1441 transitions. [2021-06-12 20:06:53,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:53,121 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1441 transitions. [2021-06-12 20:06:53,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:53,121 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:53,121 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:53,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5164,903 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:53,322 INFO L430 AbstractCegarLoop]: === Iteration 915 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:53,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:53,322 INFO L82 PathProgramCache]: Analyzing trace with hash -68073609, now seen corresponding path program 903 times [2021-06-12 20:06:53,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:53,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417997176] [2021-06-12 20:06:53,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:53,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:53,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:53,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417997176] [2021-06-12 20:06:53,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417997176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:53,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211542213] [2021-06-12 20:06:53,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 904 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 904 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:53,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:06:53,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:53,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:53,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:53,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:53,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:53,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:53,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:53,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 20:06:53,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:06:53,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:53,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:53,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:53,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:53,477 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:06:53,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:53,477 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:06:53,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:53,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211542213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:53,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:53,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:06:53,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850073358] [2021-06-12 20:06:53,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:53,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:53,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:53,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:53,523 INFO L87 Difference]: Start difference. First operand 461 states and 1441 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:53,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:53,744 INFO L93 Difference]: Finished difference Result 753 states and 2302 transitions. [2021-06-12 20:06:53,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:06:53,745 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:53,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:53,746 INFO L225 Difference]: With dead ends: 753 [2021-06-12 20:06:53,746 INFO L226 Difference]: Without dead ends: 722 [2021-06-12 20:06:53,746 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 156.0ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:06:53,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-06-12 20:06:53,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 464. [2021-06-12 20:06:53,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.1295896328293735) internal successors, (1449), 463 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:53,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1449 transitions. [2021-06-12 20:06:53,751 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1449 transitions. Word has length 21 [2021-06-12 20:06:53,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:53,751 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1449 transitions. [2021-06-12 20:06:53,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:53,751 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1449 transitions. [2021-06-12 20:06:53,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:53,752 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:53,752 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:53,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 904 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5167 [2021-06-12 20:06:53,952 INFO L430 AbstractCegarLoop]: === Iteration 916 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:53,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:53,953 INFO L82 PathProgramCache]: Analyzing trace with hash -352336293, now seen corresponding path program 904 times [2021-06-12 20:06:53,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:53,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279943701] [2021-06-12 20:06:53,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:53,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:54,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:54,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:54,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279943701] [2021-06-12 20:06:54,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279943701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:54,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041013294] [2021-06-12 20:06:54,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 905 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 905 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:54,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:06:54,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:54,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:54,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:54,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:54,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:54,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:54,080 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:54,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:54,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:54,087 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:06:54,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:54,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:54,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:54,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:54,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:54,144 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:06:54,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:54,144 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:13 [2021-06-12 20:06:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:54,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041013294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:54,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:54,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:06:54,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555089902] [2021-06-12 20:06:54,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:06:54,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:54,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:06:54,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:06:54,191 INFO L87 Difference]: Start difference. First operand 464 states and 1449 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:54,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:54,869 INFO L93 Difference]: Finished difference Result 1164 states and 3567 transitions. [2021-06-12 20:06:54,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:06:54,869 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:54,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:54,871 INFO L225 Difference]: With dead ends: 1164 [2021-06-12 20:06:54,871 INFO L226 Difference]: Without dead ends: 1137 [2021-06-12 20:06:54,871 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 497.4ms TimeCoverageRelationStatistics Valid=198, Invalid=924, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:06:54,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-06-12 20:06:54,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 491. [2021-06-12 20:06:54,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.163265306122449) internal successors, (1550), 490 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:54,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1550 transitions. [2021-06-12 20:06:54,878 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1550 transitions. Word has length 21 [2021-06-12 20:06:54,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:54,878 INFO L482 AbstractCegarLoop]: Abstraction has 491 states and 1550 transitions. [2021-06-12 20:06:54,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:54,878 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1550 transitions. [2021-06-12 20:06:54,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:54,879 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:54,879 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:55,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 905 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5170 [2021-06-12 20:06:55,079 INFO L430 AbstractCegarLoop]: === Iteration 917 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:55,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:55,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1334055547, now seen corresponding path program 905 times [2021-06-12 20:06:55,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:55,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209938225] [2021-06-12 20:06:55,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:55,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:55,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:55,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209938225] [2021-06-12 20:06:55,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209938225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:55,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518694942] [2021-06-12 20:06:55,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 906 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 906 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:55,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:06:55,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:55,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:55,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:55,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:55,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:55,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:55,202 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:55,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:55,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:55,209 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:06:55,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:55,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:55,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:55,271 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:06:55,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:55,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:06:55,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:55,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518694942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:55,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:55,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:06:55,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438489978] [2021-06-12 20:06:55,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:06:55,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:55,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:06:55,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:06:55,301 INFO L87 Difference]: Start difference. First operand 491 states and 1550 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:55,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:55,853 INFO L93 Difference]: Finished difference Result 1047 states and 3217 transitions. [2021-06-12 20:06:55,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:06:55,853 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:55,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:55,854 INFO L225 Difference]: With dead ends: 1047 [2021-06-12 20:06:55,854 INFO L226 Difference]: Without dead ends: 1026 [2021-06-12 20:06:55,854 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 437.9ms TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:06:55,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2021-06-12 20:06:55,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 486. [2021-06-12 20:06:55,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.160824742268041) internal successors, (1533), 485 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:55,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1533 transitions. [2021-06-12 20:06:55,861 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1533 transitions. Word has length 21 [2021-06-12 20:06:55,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:55,861 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1533 transitions. [2021-06-12 20:06:55,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:55,861 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1533 transitions. [2021-06-12 20:06:55,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:55,862 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:55,862 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:56,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5180,906 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:56,062 INFO L430 AbstractCegarLoop]: === Iteration 918 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:56,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:56,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1920675951, now seen corresponding path program 906 times [2021-06-12 20:06:56,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:56,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540034723] [2021-06-12 20:06:56,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:56,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:56,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:56,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540034723] [2021-06-12 20:06:56,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540034723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:56,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503851385] [2021-06-12 20:06:56,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 907 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 907 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:56,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:06:56,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:56,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:56,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:56,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:56,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:56,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:56,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:56,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:56,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:56,190 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:06:56,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:56,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:56,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:56,248 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:06:56,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:56,248 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:06:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:56,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503851385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:56,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:56,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:06:56,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348972069] [2021-06-12 20:06:56,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:06:56,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:56,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:06:56,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:06:56,276 INFO L87 Difference]: Start difference. First operand 486 states and 1533 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:57,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:57,020 INFO L93 Difference]: Finished difference Result 1154 states and 3533 transitions. [2021-06-12 20:06:57,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:06:57,021 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:57,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:57,022 INFO L225 Difference]: With dead ends: 1154 [2021-06-12 20:06:57,022 INFO L226 Difference]: Without dead ends: 1133 [2021-06-12 20:06:57,022 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 535.5ms TimeCoverageRelationStatistics Valid=265, Invalid=1141, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:06:57,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-06-12 20:06:57,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 484. [2021-06-12 20:06:57,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.1635610766045548) internal successors, (1528), 483 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:57,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1528 transitions. [2021-06-12 20:06:57,029 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1528 transitions. Word has length 21 [2021-06-12 20:06:57,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:57,030 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1528 transitions. [2021-06-12 20:06:57,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:57,030 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1528 transitions. [2021-06-12 20:06:57,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:57,030 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:57,030 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:57,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5186,907 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:57,231 INFO L430 AbstractCegarLoop]: === Iteration 919 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:57,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:57,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1780534143, now seen corresponding path program 907 times [2021-06-12 20:06:57,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:57,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976395019] [2021-06-12 20:06:57,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:57,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:57,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:57,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:57,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976395019] [2021-06-12 20:06:57,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976395019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:57,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560655466] [2021-06-12 20:06:57,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 908 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 908 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:57,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:57,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:57,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:57,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:57,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:57,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:57,352 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:57,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:57,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:57,358 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:06:57,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:57,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:57,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:57,406 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:06:57,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:57,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:06:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:57,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560655466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:57,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:57,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:06:57,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455169981] [2021-06-12 20:06:57,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:06:57,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:57,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:06:57,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:06:57,420 INFO L87 Difference]: Start difference. First operand 484 states and 1528 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:57,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:57,545 INFO L93 Difference]: Finished difference Result 763 states and 2369 transitions. [2021-06-12 20:06:57,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:57,545 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:57,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:57,546 INFO L225 Difference]: With dead ends: 763 [2021-06-12 20:06:57,546 INFO L226 Difference]: Without dead ends: 741 [2021-06-12 20:06:57,546 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:06:57,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-06-12 20:06:57,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 486. [2021-06-12 20:06:57,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.160824742268041) internal successors, (1533), 485 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:57,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1533 transitions. [2021-06-12 20:06:57,552 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1533 transitions. Word has length 21 [2021-06-12 20:06:57,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:57,552 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1533 transitions. [2021-06-12 20:06:57,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:57,552 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1533 transitions. [2021-06-12 20:06:57,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:57,553 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:57,553 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:57,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 908 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5192 [2021-06-12 20:06:57,753 INFO L430 AbstractCegarLoop]: === Iteration 920 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:57,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:57,753 INFO L82 PathProgramCache]: Analyzing trace with hash -464475507, now seen corresponding path program 908 times [2021-06-12 20:06:57,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:57,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63240238] [2021-06-12 20:06:57,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:57,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:57,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63240238] [2021-06-12 20:06:57,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63240238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:57,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646456374] [2021-06-12 20:06:57,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 909 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 909 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:57,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:06:57,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:57,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:57,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:57,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:57,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:57,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:57,879 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:57,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:57,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:57,886 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:06:57,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:57,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:57,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:57,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:57,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:57,919 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:06:57,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:57,920 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-06-12 20:06:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:57,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646456374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:57,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:57,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:06:57,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272805499] [2021-06-12 20:06:57,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:06:57,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:57,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:06:57,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:06:57,942 INFO L87 Difference]: Start difference. First operand 486 states and 1533 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:58,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:58,124 INFO L93 Difference]: Finished difference Result 777 states and 2407 transitions. [2021-06-12 20:06:58,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:58,124 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:58,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:58,125 INFO L225 Difference]: With dead ends: 777 [2021-06-12 20:06:58,125 INFO L226 Difference]: Without dead ends: 748 [2021-06-12 20:06:58,125 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:06:58,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-06-12 20:06:58,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 479. [2021-06-12 20:06:58,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.1527196652719667) internal successors, (1507), 478 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:58,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1507 transitions. [2021-06-12 20:06:58,131 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1507 transitions. Word has length 21 [2021-06-12 20:06:58,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:58,131 INFO L482 AbstractCegarLoop]: Abstraction has 479 states and 1507 transitions. [2021-06-12 20:06:58,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:58,131 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1507 transitions. [2021-06-12 20:06:58,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:58,131 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:58,131 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:58,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5195,909 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:58,332 INFO L430 AbstractCegarLoop]: === Iteration 921 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:58,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:58,332 INFO L82 PathProgramCache]: Analyzing trace with hash 842409421, now seen corresponding path program 909 times [2021-06-12 20:06:58,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:58,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734486298] [2021-06-12 20:06:58,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:58,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:58,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:58,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734486298] [2021-06-12 20:06:58,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734486298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:58,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939075210] [2021-06-12 20:06:58,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 910 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 910 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:58,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:06:58,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:58,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:58,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:58,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:58,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:58,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:58,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:58,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:58,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:58,481 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:06:58,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:58,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:58,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:58,521 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:06:58,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:58,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:06:58,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:58,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939075210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:58,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:58,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:06:58,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221209603] [2021-06-12 20:06:58,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:06:58,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:58,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:06:58,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:06:58,535 INFO L87 Difference]: Start difference. First operand 479 states and 1507 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:58,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:58,719 INFO L93 Difference]: Finished difference Result 605 states and 1876 transitions. [2021-06-12 20:06:58,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:58,719 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:58,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:58,720 INFO L225 Difference]: With dead ends: 605 [2021-06-12 20:06:58,720 INFO L226 Difference]: Without dead ends: 583 [2021-06-12 20:06:58,720 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 112.9ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:06:58,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-06-12 20:06:58,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 484. [2021-06-12 20:06:58,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.1552795031055902) internal successors, (1524), 483 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:58,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1524 transitions. [2021-06-12 20:06:58,725 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1524 transitions. Word has length 21 [2021-06-12 20:06:58,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:58,725 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1524 transitions. [2021-06-12 20:06:58,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:58,725 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1524 transitions. [2021-06-12 20:06:58,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:58,726 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:58,726 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:58,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 910 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5199 [2021-06-12 20:06:58,926 INFO L430 AbstractCegarLoop]: === Iteration 922 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:58,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:58,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1467733539, now seen corresponding path program 910 times [2021-06-12 20:06:58,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:58,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740023798] [2021-06-12 20:06:58,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:58,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:59,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:59,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:59,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740023798] [2021-06-12 20:06:59,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740023798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:59,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857390174] [2021-06-12 20:06:59,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 911 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 911 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:59,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:06:59,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:59,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:59,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:59,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:59,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:59,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:59,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:06:59,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 20:06:59,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:06:59,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:59,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:59,109 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:59,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:59,115 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:06:59,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:59,116 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:06:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:59,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857390174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:59,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:59,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:06:59,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531996496] [2021-06-12 20:06:59,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:06:59,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:59,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:06:59,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:06:59,161 INFO L87 Difference]: Start difference. First operand 484 states and 1524 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:59,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:59,395 INFO L93 Difference]: Finished difference Result 681 states and 2106 transitions. [2021-06-12 20:06:59,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:06:59,396 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:59,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:59,396 INFO L225 Difference]: With dead ends: 681 [2021-06-12 20:06:59,397 INFO L226 Difference]: Without dead ends: 654 [2021-06-12 20:06:59,397 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 187.1ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:06:59,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-06-12 20:06:59,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 484. [2021-06-12 20:06:59,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.1511387163561078) internal successors, (1522), 483 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:59,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1522 transitions. [2021-06-12 20:06:59,402 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1522 transitions. Word has length 21 [2021-06-12 20:06:59,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:59,402 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1522 transitions. [2021-06-12 20:06:59,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:59,402 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1522 transitions. [2021-06-12 20:06:59,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:59,402 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:59,403 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:59,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5202,911 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:59,603 INFO L430 AbstractCegarLoop]: === Iteration 923 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:59,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:59,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1402600229, now seen corresponding path program 911 times [2021-06-12 20:06:59,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:59,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095041754] [2021-06-12 20:06:59,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:59,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:59,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095041754] [2021-06-12 20:06:59,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095041754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:59,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201479156] [2021-06-12 20:06:59,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 912 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 912 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:59,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:06:59,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:59,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:59,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:59,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:59,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:59,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:59,742 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:59,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:59,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:59,751 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:06:59,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:06:59,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:59,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:59,788 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:06:59,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:59,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:59,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:59,798 INFO L518 ElimStorePlain]: Eliminatee v_prenex_266 vanished before elimination [2021-06-12 20:06:59,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:59,799 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:21 [2021-06-12 20:06:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:06:59,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201479156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:59,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:59,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:06:59,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950271080] [2021-06-12 20:06:59,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:06:59,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:59,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:06:59,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:06:59,832 INFO L87 Difference]: Start difference. First operand 484 states and 1522 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:59,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:59,984 INFO L93 Difference]: Finished difference Result 654 states and 2025 transitions. [2021-06-12 20:06:59,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:06:59,985 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:06:59,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:59,985 INFO L225 Difference]: With dead ends: 654 [2021-06-12 20:06:59,985 INFO L226 Difference]: Without dead ends: 625 [2021-06-12 20:06:59,986 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:06:59,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-06-12 20:06:59,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 485. [2021-06-12 20:06:59,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.15702479338843) internal successors, (1528), 484 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:59,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1528 transitions. [2021-06-12 20:06:59,990 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1528 transitions. Word has length 21 [2021-06-12 20:06:59,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:59,991 INFO L482 AbstractCegarLoop]: Abstraction has 485 states and 1528 transitions. [2021-06-12 20:06:59,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:59,991 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1528 transitions. [2021-06-12 20:06:59,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:06:59,991 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:59,991 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:00,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 912 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5205 [2021-06-12 20:07:00,192 INFO L430 AbstractCegarLoop]: === Iteration 924 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:00,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:00,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1105333819, now seen corresponding path program 912 times [2021-06-12 20:07:00,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:00,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443329978] [2021-06-12 20:07:00,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:00,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:00,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443329978] [2021-06-12 20:07:00,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443329978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:00,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469622018] [2021-06-12 20:07:00,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 913 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 913 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:00,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:07:00,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:00,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:00,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:00,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:00,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:00,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:00,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:00,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 20:07:00,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:00,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:00,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:07:00,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:00,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:00,392 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:07:00,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:00,392 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:45, output treesize:19 [2021-06-12 20:07:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:00,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469622018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:00,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:00,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:07:00,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55787507] [2021-06-12 20:07:00,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:07:00,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:00,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:07:00,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:07:00,462 INFO L87 Difference]: Start difference. First operand 485 states and 1528 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:00,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:00,755 INFO L93 Difference]: Finished difference Result 688 states and 2123 transitions. [2021-06-12 20:07:00,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:07:00,755 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:00,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:00,756 INFO L225 Difference]: With dead ends: 688 [2021-06-12 20:07:00,756 INFO L226 Difference]: Without dead ends: 665 [2021-06-12 20:07:00,756 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 247.7ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:07:00,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-06-12 20:07:00,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 481. [2021-06-12 20:07:00,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.15) internal successors, (1512), 480 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:00,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1512 transitions. [2021-06-12 20:07:00,761 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1512 transitions. Word has length 21 [2021-06-12 20:07:00,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:00,761 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1512 transitions. [2021-06-12 20:07:00,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:00,761 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1512 transitions. [2021-06-12 20:07:00,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:00,762 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:00,762 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:00,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 913 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5210 [2021-06-12 20:07:00,962 INFO L430 AbstractCegarLoop]: === Iteration 925 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:00,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:00,962 INFO L82 PathProgramCache]: Analyzing trace with hash 294644715, now seen corresponding path program 913 times [2021-06-12 20:07:00,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:00,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994676756] [2021-06-12 20:07:00,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:01,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:01,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994676756] [2021-06-12 20:07:01,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994676756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:01,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470002956] [2021-06-12 20:07:01,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 914 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 914 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:01,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:01,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:01,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:01,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:01,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:01,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:01,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-06-12 20:07:01,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:07:01,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:01,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:07:01,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:01,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:01,159 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:07:01,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:01,160 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-06-12 20:07:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:01,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470002956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:01,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:01,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:07:01,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837601780] [2021-06-12 20:07:01,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:07:01,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:01,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:07:01,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:07:01,193 INFO L87 Difference]: Start difference. First operand 481 states and 1512 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:01,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:01,362 INFO L93 Difference]: Finished difference Result 625 states and 1934 transitions. [2021-06-12 20:07:01,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:01,362 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:01,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:01,363 INFO L225 Difference]: With dead ends: 625 [2021-06-12 20:07:01,363 INFO L226 Difference]: Without dead ends: 589 [2021-06-12 20:07:01,363 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:01,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-06-12 20:07:01,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 482. [2021-06-12 20:07:01,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.1538461538461537) internal successors, (1517), 481 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:01,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1517 transitions. [2021-06-12 20:07:01,368 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1517 transitions. Word has length 21 [2021-06-12 20:07:01,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:01,368 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1517 transitions. [2021-06-12 20:07:01,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:01,368 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1517 transitions. [2021-06-12 20:07:01,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:01,369 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:01,369 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:01,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5216,914 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:01,569 INFO L430 AbstractCegarLoop]: === Iteration 926 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:01,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:01,570 INFO L82 PathProgramCache]: Analyzing trace with hash 591911125, now seen corresponding path program 914 times [2021-06-12 20:07:01,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:01,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247148663] [2021-06-12 20:07:01,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:01,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:01,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:01,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247148663] [2021-06-12 20:07:01,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247148663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:01,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615612401] [2021-06-12 20:07:01,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 915 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 915 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:01,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:07:01,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:01,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:01,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:01,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:01,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:01,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:01,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:01,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:01,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:01,730 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:07:01,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:01,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:01,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:01,767 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:07:01,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:01,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:01,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:01,778 INFO L518 ElimStorePlain]: Eliminatee v_prenex_268 vanished before elimination [2021-06-12 20:07:01,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:01,778 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:19 [2021-06-12 20:07:01,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:01,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615612401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:01,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:01,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:07:01,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444355817] [2021-06-12 20:07:01,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:07:01,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:01,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:07:01,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:07:01,848 INFO L87 Difference]: Start difference. First operand 482 states and 1517 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:02,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:02,171 INFO L93 Difference]: Finished difference Result 727 states and 2234 transitions. [2021-06-12 20:07:02,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:07:02,171 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:02,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:02,172 INFO L225 Difference]: With dead ends: 727 [2021-06-12 20:07:02,172 INFO L226 Difference]: Without dead ends: 704 [2021-06-12 20:07:02,172 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 263.1ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:07:02,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-06-12 20:07:02,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 497. [2021-06-12 20:07:02,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.1693548387096775) internal successors, (1572), 496 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:02,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1572 transitions. [2021-06-12 20:07:02,178 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1572 transitions. Word has length 21 [2021-06-12 20:07:02,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:02,178 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1572 transitions. [2021-06-12 20:07:02,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:02,178 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1572 transitions. [2021-06-12 20:07:02,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:02,179 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:02,179 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:02,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5219,915 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:02,379 INFO L430 AbstractCegarLoop]: === Iteration 927 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:02,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:02,379 INFO L82 PathProgramCache]: Analyzing trace with hash 307648441, now seen corresponding path program 915 times [2021-06-12 20:07:02,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:02,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055272626] [2021-06-12 20:07:02,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:02,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:02,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:02,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055272626] [2021-06-12 20:07:02,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055272626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:02,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265449792] [2021-06-12 20:07:02,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 916 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 916 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:02,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:07:02,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:02,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:02,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:02,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:02,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:02,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:02,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:02,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:02,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:02,544 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:07:02,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:02,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:02,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:02,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:02,582 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:02,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:02,591 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:07:02,591 INFO L518 ElimStorePlain]: Eliminatee v_prenex_269 vanished before elimination [2021-06-12 20:07:02,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:02,591 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:19 [2021-06-12 20:07:02,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:02,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265449792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:02,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:02,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:07:02,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946469154] [2021-06-12 20:07:02,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:07:02,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:02,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:07:02,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:07:02,665 INFO L87 Difference]: Start difference. First operand 497 states and 1572 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:02,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:02,954 INFO L93 Difference]: Finished difference Result 812 states and 2510 transitions. [2021-06-12 20:07:02,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:07:02,954 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:02,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:02,956 INFO L225 Difference]: With dead ends: 812 [2021-06-12 20:07:02,956 INFO L226 Difference]: Without dead ends: 785 [2021-06-12 20:07:02,956 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 263.9ms TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:07:02,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2021-06-12 20:07:02,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 503. [2021-06-12 20:07:02,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 3.1673306772908365) internal successors, (1590), 502 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:02,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1590 transitions. [2021-06-12 20:07:02,961 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1590 transitions. Word has length 21 [2021-06-12 20:07:02,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:02,962 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1590 transitions. [2021-06-12 20:07:02,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:02,962 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1590 transitions. [2021-06-12 20:07:02,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:02,962 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:02,962 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:03,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5227,916 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:03,163 INFO L430 AbstractCegarLoop]: === Iteration 928 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:03,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:03,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1653098525, now seen corresponding path program 916 times [2021-06-12 20:07:03,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:03,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164184084] [2021-06-12 20:07:03,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:03,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:03,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:03,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164184084] [2021-06-12 20:07:03,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164184084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:03,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680671497] [2021-06-12 20:07:03,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 917 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 917 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:03,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:07:03,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:03,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:03,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:03,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:03,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:03,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:03,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:03,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:03,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:03,309 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:07:03,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:03,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:03,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:03,347 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:07:03,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:03,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:07:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:03,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680671497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:03,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:03,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:07:03,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558259853] [2021-06-12 20:07:03,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:07:03,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:03,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:07:03,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:07:03,363 INFO L87 Difference]: Start difference. First operand 503 states and 1590 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:03,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:03,507 INFO L93 Difference]: Finished difference Result 631 states and 1952 transitions. [2021-06-12 20:07:03,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:03,508 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:03,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:03,508 INFO L225 Difference]: With dead ends: 631 [2021-06-12 20:07:03,508 INFO L226 Difference]: Without dead ends: 612 [2021-06-12 20:07:03,508 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:03,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-12 20:07:03,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 485. [2021-06-12 20:07:03,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.1632231404958677) internal successors, (1531), 484 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:03,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1531 transitions. [2021-06-12 20:07:03,513 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1531 transitions. Word has length 21 [2021-06-12 20:07:03,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:03,513 INFO L482 AbstractCegarLoop]: Abstraction has 485 states and 1531 transitions. [2021-06-12 20:07:03,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:03,514 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1531 transitions. [2021-06-12 20:07:03,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:03,514 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:03,514 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:03,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5238,917 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:03,715 INFO L430 AbstractCegarLoop]: === Iteration 929 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:03,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:03,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1107725871, now seen corresponding path program 917 times [2021-06-12 20:07:03,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:03,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131077390] [2021-06-12 20:07:03,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:03,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:03,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131077390] [2021-06-12 20:07:03,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131077390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:03,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351766350] [2021-06-12 20:07:03,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 918 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 918 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:03,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:07:03,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:03,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:03,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:03,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:03,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:03,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:03,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:03,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:03,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:03,877 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:07:03,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:03,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:03,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:03,937 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:07:03,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:03,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:07:03,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:03,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351766350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:03,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:03,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:07:03,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396039993] [2021-06-12 20:07:03,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:03,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:03,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:03,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:03,947 INFO L87 Difference]: Start difference. First operand 485 states and 1531 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:04,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:04,138 INFO L93 Difference]: Finished difference Result 650 states and 2005 transitions. [2021-06-12 20:07:04,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:04,138 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:04,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:04,139 INFO L225 Difference]: With dead ends: 650 [2021-06-12 20:07:04,139 INFO L226 Difference]: Without dead ends: 629 [2021-06-12 20:07:04,139 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 186.7ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:07:04,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-12 20:07:04,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 485. [2021-06-12 20:07:04,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.1714876033057853) internal successors, (1535), 484 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:04,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1535 transitions. [2021-06-12 20:07:04,144 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1535 transitions. Word has length 21 [2021-06-12 20:07:04,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:04,144 INFO L482 AbstractCegarLoop]: Abstraction has 485 states and 1535 transitions. [2021-06-12 20:07:04,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:04,145 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1535 transitions. [2021-06-12 20:07:04,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:04,145 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:04,145 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:04,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 918 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5241 [2021-06-12 20:07:04,346 INFO L430 AbstractCegarLoop]: === Iteration 930 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:04,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:04,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1468256743, now seen corresponding path program 918 times [2021-06-12 20:07:04,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:04,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299180476] [2021-06-12 20:07:04,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:04,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:04,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299180476] [2021-06-12 20:07:04,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299180476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:04,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992234204] [2021-06-12 20:07:04,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 919 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 919 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:04,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:07:04,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:04,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:04,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:04,543 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[v_prenex_271]} [2021-06-12 20:07:04,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:04,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:04,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:04,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:04,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:04,563 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:04,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:04,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:04,576 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:50, output treesize:34 [2021-06-12 20:07:04,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:04,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:04,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:04,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:04,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:04,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:04,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:04,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:04,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:04,656 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:10 [2021-06-12 20:07:04,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:04,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992234204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:04,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:04,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:04,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075904306] [2021-06-12 20:07:04,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:04,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:04,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:04,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:04,702 INFO L87 Difference]: Start difference. First operand 485 states and 1535 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:05,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:05,080 INFO L93 Difference]: Finished difference Result 776 states and 2395 transitions. [2021-06-12 20:07:05,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:07:05,080 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:05,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:05,081 INFO L225 Difference]: With dead ends: 776 [2021-06-12 20:07:05,081 INFO L226 Difference]: Without dead ends: 755 [2021-06-12 20:07:05,081 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 347.7ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:07:05,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-06-12 20:07:05,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 481. [2021-06-12 20:07:05,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.1625) internal successors, (1518), 480 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:05,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1518 transitions. [2021-06-12 20:07:05,087 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1518 transitions. Word has length 21 [2021-06-12 20:07:05,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:05,087 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1518 transitions. [2021-06-12 20:07:05,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:05,087 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1518 transitions. [2021-06-12 20:07:05,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:05,087 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:05,087 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:05,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5247,919 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:05,288 INFO L430 AbstractCegarLoop]: === Iteration 931 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:05,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:05,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1430323375, now seen corresponding path program 919 times [2021-06-12 20:07:05,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:05,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441078637] [2021-06-12 20:07:05,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:05,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:05,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:05,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:05,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441078637] [2021-06-12 20:07:05,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441078637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:05,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041025682] [2021-06-12 20:07:05,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 920 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 920 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:05,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:05,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:05,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:05,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:05,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:05,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:07:05,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-06-12 20:07:05,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:05,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:05,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:05,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:05,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:05,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:05,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:05,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:05,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:05,541 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:28, output treesize:7 [2021-06-12 20:07:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:05,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041025682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:05,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:05,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:05,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160612120] [2021-06-12 20:07:05,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:05,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:05,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:05,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:05,571 INFO L87 Difference]: Start difference. First operand 481 states and 1518 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:05,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:05,788 INFO L93 Difference]: Finished difference Result 769 states and 2380 transitions. [2021-06-12 20:07:05,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:07:05,789 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:05,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:05,790 INFO L225 Difference]: With dead ends: 769 [2021-06-12 20:07:05,790 INFO L226 Difference]: Without dead ends: 748 [2021-06-12 20:07:05,790 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 199.0ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:07:05,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-06-12 20:07:05,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 487. [2021-06-12 20:07:05,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.1666666666666665) internal successors, (1539), 486 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:05,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1539 transitions. [2021-06-12 20:07:05,796 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1539 transitions. Word has length 21 [2021-06-12 20:07:05,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:05,796 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1539 transitions. [2021-06-12 20:07:05,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:05,796 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1539 transitions. [2021-06-12 20:07:05,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:05,796 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:05,796 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:05,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5252,920 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:05,997 INFO L430 AbstractCegarLoop]: === Iteration 932 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:05,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:05,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1534715759, now seen corresponding path program 920 times [2021-06-12 20:07:05,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:05,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831688377] [2021-06-12 20:07:05,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:06,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:06,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:06,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831688377] [2021-06-12 20:07:06,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831688377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:06,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351467926] [2021-06-12 20:07:06,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 921 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 921 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:06,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:07:06,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:06,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:06,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:06,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:06,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:06,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:06,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:07:06,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-06-12 20:07:06,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:06,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:06,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:06,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:06,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:06,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:06,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:06,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:06,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:06,209 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:10 [2021-06-12 20:07:06,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:06,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351467926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:06,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:06,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:07:06,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106188888] [2021-06-12 20:07:06,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:06,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:06,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:06,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:06,224 INFO L87 Difference]: Start difference. First operand 487 states and 1539 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:06,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:06,379 INFO L93 Difference]: Finished difference Result 637 states and 1975 transitions. [2021-06-12 20:07:06,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:06,379 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:06,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:06,380 INFO L225 Difference]: With dead ends: 637 [2021-06-12 20:07:06,380 INFO L226 Difference]: Without dead ends: 616 [2021-06-12 20:07:06,380 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:06,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-06-12 20:07:06,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 484. [2021-06-12 20:07:06,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.1614906832298137) internal successors, (1527), 483 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:06,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1527 transitions. [2021-06-12 20:07:06,385 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1527 transitions. Word has length 21 [2021-06-12 20:07:06,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:06,385 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1527 transitions. [2021-06-12 20:07:06,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:06,385 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1527 transitions. [2021-06-12 20:07:06,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:06,385 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:06,385 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:06,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5258,921 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:06,586 INFO L430 AbstractCegarLoop]: === Iteration 933 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:06,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:06,586 INFO L82 PathProgramCache]: Analyzing trace with hash 619634271, now seen corresponding path program 921 times [2021-06-12 20:07:06,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:06,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916606312] [2021-06-12 20:07:06,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:06,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:06,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:06,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916606312] [2021-06-12 20:07:06,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916606312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:06,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998178053] [2021-06-12 20:07:06,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 922 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 922 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:06,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:07:06,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:06,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:06,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:06,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:06,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:06,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:06,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:06,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:07:06,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2021-06-12 20:07:06,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:06,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:06,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:06,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:06,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:06,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:06,844 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:06,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:06,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:06,851 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:10 [2021-06-12 20:07:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:06,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998178053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:06,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:06,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:06,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904331345] [2021-06-12 20:07:06,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:06,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:06,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:06,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:06,897 INFO L87 Difference]: Start difference. First operand 484 states and 1527 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:07,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:07,186 INFO L93 Difference]: Finished difference Result 777 states and 2402 transitions. [2021-06-12 20:07:07,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:07:07,186 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:07,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:07,187 INFO L225 Difference]: With dead ends: 777 [2021-06-12 20:07:07,187 INFO L226 Difference]: Without dead ends: 756 [2021-06-12 20:07:07,187 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 255.4ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:07:07,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-06-12 20:07:07,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 480. [2021-06-12 20:07:07,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.1607515657620042) internal successors, (1514), 479 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:07,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1514 transitions. [2021-06-12 20:07:07,193 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1514 transitions. Word has length 21 [2021-06-12 20:07:07,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:07,193 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1514 transitions. [2021-06-12 20:07:07,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:07,193 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1514 transitions. [2021-06-12 20:07:07,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:07,193 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:07,193 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:07,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 922 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5260 [2021-06-12 20:07:07,394 INFO L430 AbstractCegarLoop]: === Iteration 934 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:07,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:07,394 INFO L82 PathProgramCache]: Analyzing trace with hash -2082457945, now seen corresponding path program 922 times [2021-06-12 20:07:07,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:07,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830386921] [2021-06-12 20:07:07,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:07,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:07,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:07,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:07,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830386921] [2021-06-12 20:07:07,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830386921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:07,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622828121] [2021-06-12 20:07:07,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 923 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 923 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:07,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:07:07,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:07,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:07,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:07,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:07,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:07,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:07,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:07,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 20:07:07,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:07,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:07,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:07,564 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:07:07,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:07,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:07:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:07,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622828121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:07,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:07,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:07:07,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465120957] [2021-06-12 20:07:07,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:07:07,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:07,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:07:07,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:07,592 INFO L87 Difference]: Start difference. First operand 480 states and 1514 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:08,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:08,227 INFO L93 Difference]: Finished difference Result 984 states and 2991 transitions. [2021-06-12 20:07:08,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:07:08,227 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:08,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:08,229 INFO L225 Difference]: With dead ends: 984 [2021-06-12 20:07:08,229 INFO L226 Difference]: Without dead ends: 963 [2021-06-12 20:07:08,229 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 461.3ms TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:07:08,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-06-12 20:07:08,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 478. [2021-06-12 20:07:08,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.1446540880503147) internal successors, (1500), 477 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:08,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1500 transitions. [2021-06-12 20:07:08,235 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1500 transitions. Word has length 21 [2021-06-12 20:07:08,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:08,235 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1500 transitions. [2021-06-12 20:07:08,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:08,235 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1500 transitions. [2021-06-12 20:07:08,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:08,235 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:08,236 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:08,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5263,923 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:08,436 INFO L430 AbstractCegarLoop]: === Iteration 935 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:08,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:08,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2095251849, now seen corresponding path program 923 times [2021-06-12 20:07:08,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:08,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802481702] [2021-06-12 20:07:08,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:08,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:08,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:08,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802481702] [2021-06-12 20:07:08,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802481702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:08,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982426764] [2021-06-12 20:07:08,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 924 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 924 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:08,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:07:08,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:08,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:07:08,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:08,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:08,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:08,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:08,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:08,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:07:08,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:08,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:08,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:08,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:08,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:08,642 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:07:08,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:08,643 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:31 [2021-06-12 20:07:08,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:08,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982426764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:08,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:08,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:07:08,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28971462] [2021-06-12 20:07:08,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:07:08,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:08,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:07:08,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:07:08,715 INFO L87 Difference]: Start difference. First operand 478 states and 1500 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:09,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:09,010 INFO L93 Difference]: Finished difference Result 811 states and 2487 transitions. [2021-06-12 20:07:09,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:07:09,010 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:09,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:09,012 INFO L225 Difference]: With dead ends: 811 [2021-06-12 20:07:09,012 INFO L226 Difference]: Without dead ends: 790 [2021-06-12 20:07:09,012 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 266.3ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:07:09,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-06-12 20:07:09,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 454. [2021-06-12 20:07:09,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 3.1280353200883004) internal successors, (1417), 453 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:09,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1417 transitions. [2021-06-12 20:07:09,017 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1417 transitions. Word has length 21 [2021-06-12 20:07:09,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:09,017 INFO L482 AbstractCegarLoop]: Abstraction has 454 states and 1417 transitions. [2021-06-12 20:07:09,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:09,017 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1417 transitions. [2021-06-12 20:07:09,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:09,018 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:09,018 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:09,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 924 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5265 [2021-06-12 20:07:09,218 INFO L430 AbstractCegarLoop]: === Iteration 936 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:09,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:09,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1901610267, now seen corresponding path program 924 times [2021-06-12 20:07:09,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:09,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717206166] [2021-06-12 20:07:09,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:09,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:09,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:09,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717206166] [2021-06-12 20:07:09,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717206166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:09,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740517429] [2021-06-12 20:07:09,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 925 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 925 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:09,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:07:09,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:09,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:09,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:09,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:09,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:09,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:09,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:09,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:07:09,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 20:07:09,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:09,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:09,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:09,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:09,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:09,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:07:09,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:09,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:09,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:09,488 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:9 [2021-06-12 20:07:09,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:09,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740517429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:09,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:09,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:07:09,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255025948] [2021-06-12 20:07:09,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:07:09,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:09,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:07:09,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:09,496 INFO L87 Difference]: Start difference. First operand 454 states and 1417 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:09,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:09,619 INFO L93 Difference]: Finished difference Result 531 states and 1638 transitions. [2021-06-12 20:07:09,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:09,619 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:09,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:09,620 INFO L225 Difference]: With dead ends: 531 [2021-06-12 20:07:09,620 INFO L226 Difference]: Without dead ends: 509 [2021-06-12 20:07:09,620 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 157.8ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:09,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-12 20:07:09,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 459. [2021-06-12 20:07:09,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 3.131004366812227) internal successors, (1434), 458 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:09,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1434 transitions. [2021-06-12 20:07:09,625 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1434 transitions. Word has length 21 [2021-06-12 20:07:09,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:09,625 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 1434 transitions. [2021-06-12 20:07:09,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:09,625 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1434 transitions. [2021-06-12 20:07:09,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:09,625 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:09,625 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:09,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 925 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5271 [2021-06-12 20:07:09,826 INFO L430 AbstractCegarLoop]: === Iteration 937 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:09,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:09,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1891565693, now seen corresponding path program 925 times [2021-06-12 20:07:09,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:09,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891525131] [2021-06-12 20:07:09,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:09,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:09,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891525131] [2021-06-12 20:07:09,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891525131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:09,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377233293] [2021-06-12 20:07:09,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 926 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 926 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:09,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:09,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:09,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:10,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:10,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:10,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:10,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:10,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:07:10,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 20:07:10,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:10,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:10,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:10,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:10,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:10,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:07:10,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:10,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:10,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:10,093 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 20:07:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:10,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377233293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:10,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:10,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:07:10,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975408751] [2021-06-12 20:07:10,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:10,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:10,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:10,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:10,110 INFO L87 Difference]: Start difference. First operand 459 states and 1434 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:10,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:10,273 INFO L93 Difference]: Finished difference Result 540 states and 1662 transitions. [2021-06-12 20:07:10,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:10,273 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:10,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:10,274 INFO L225 Difference]: With dead ends: 540 [2021-06-12 20:07:10,274 INFO L226 Difference]: Without dead ends: 518 [2021-06-12 20:07:10,274 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 140.3ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:10,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-12 20:07:10,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 456. [2021-06-12 20:07:10,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.1252747252747253) internal successors, (1422), 455 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:10,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1422 transitions. [2021-06-12 20:07:10,280 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1422 transitions. Word has length 21 [2021-06-12 20:07:10,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:10,281 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1422 transitions. [2021-06-12 20:07:10,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:10,281 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1422 transitions. [2021-06-12 20:07:10,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:10,281 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:10,281 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:10,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 926 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5277 [2021-06-12 20:07:10,493 INFO L430 AbstractCegarLoop]: === Iteration 938 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:10,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:10,493 INFO L82 PathProgramCache]: Analyzing trace with hash -215218427, now seen corresponding path program 926 times [2021-06-12 20:07:10,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:10,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22374761] [2021-06-12 20:07:10,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:10,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:10,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22374761] [2021-06-12 20:07:10,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22374761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:10,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149855608] [2021-06-12 20:07:10,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 927 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 927 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:10,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:07:10,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:10,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:10,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:10,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:10,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:10,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:10,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:10,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:07:10,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 20:07:10,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:10,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:10,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:10,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:10,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:10,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:07:10,785 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:10,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:10,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:10,798 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 20:07:10,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:10,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149855608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:10,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:10,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:07:10,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801578221] [2021-06-12 20:07:10,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:10,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:10,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:10,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:10,815 INFO L87 Difference]: Start difference. First operand 456 states and 1422 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:10,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:10,970 INFO L93 Difference]: Finished difference Result 528 states and 1629 transitions. [2021-06-12 20:07:10,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:10,971 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:10,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:10,971 INFO L225 Difference]: With dead ends: 528 [2021-06-12 20:07:10,972 INFO L226 Difference]: Without dead ends: 506 [2021-06-12 20:07:10,972 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 174.2ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:10,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-12 20:07:10,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 453. [2021-06-12 20:07:10,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 3.1261061946902653) internal successors, (1413), 452 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:10,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1413 transitions. [2021-06-12 20:07:10,978 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1413 transitions. Word has length 21 [2021-06-12 20:07:10,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:10,978 INFO L482 AbstractCegarLoop]: Abstraction has 453 states and 1413 transitions. [2021-06-12 20:07:10,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:10,978 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1413 transitions. [2021-06-12 20:07:10,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:10,979 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:10,979 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:11,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5279,927 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:11,179 INFO L430 AbstractCegarLoop]: === Iteration 939 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:11,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:11,180 INFO L82 PathProgramCache]: Analyzing trace with hash 303568207, now seen corresponding path program 927 times [2021-06-12 20:07:11,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:11,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435234896] [2021-06-12 20:07:11,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:11,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:11,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:11,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435234896] [2021-06-12 20:07:11,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435234896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:11,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83610012] [2021-06-12 20:07:11,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 928 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 928 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:11,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:07:11,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:11,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:11,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:11,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:11,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:11,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:11,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:11,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:11,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:11,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:11,399 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:31 [2021-06-12 20:07:11,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:11,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:11,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:11,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:11,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:11,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:11,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:11,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:11,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:11,482 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:7 [2021-06-12 20:07:11,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:11,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83610012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:11,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:11,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:11,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586584700] [2021-06-12 20:07:11,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:11,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:11,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:11,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:11,509 INFO L87 Difference]: Start difference. First operand 453 states and 1413 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:11,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:11,854 INFO L93 Difference]: Finished difference Result 660 states and 2029 transitions. [2021-06-12 20:07:11,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:07:11,854 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:11,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:11,855 INFO L225 Difference]: With dead ends: 660 [2021-06-12 20:07:11,855 INFO L226 Difference]: Without dead ends: 641 [2021-06-12 20:07:11,855 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 319.9ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:07:11,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-06-12 20:07:11,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 457. [2021-06-12 20:07:11,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 3.125) internal successors, (1425), 456 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:11,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1425 transitions. [2021-06-12 20:07:11,860 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1425 transitions. Word has length 21 [2021-06-12 20:07:11,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:11,860 INFO L482 AbstractCegarLoop]: Abstraction has 457 states and 1425 transitions. [2021-06-12 20:07:11,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:11,860 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1425 transitions. [2021-06-12 20:07:11,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:11,861 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:11,861 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:12,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 928 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5281 [2021-06-12 20:07:12,061 INFO L430 AbstractCegarLoop]: === Iteration 940 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:12,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:12,061 INFO L82 PathProgramCache]: Analyzing trace with hash 81359595, now seen corresponding path program 928 times [2021-06-12 20:07:12,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:12,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961712689] [2021-06-12 20:07:12,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:12,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:12,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:12,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961712689] [2021-06-12 20:07:12,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961712689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:12,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522672721] [2021-06-12 20:07:12,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 929 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 929 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:12,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:07:12,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:12,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:12,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:12,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:12,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:12,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:12,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:12,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:07:12,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 20:07:12,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:12,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:12,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:12,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:12,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:07:12,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:12,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:12,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:12,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:12,346 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:12,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:12,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:12,357 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:51, output treesize:5 [2021-06-12 20:07:12,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:12,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522672721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:12,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:12,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:12,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048967359] [2021-06-12 20:07:12,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:12,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:12,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:12,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:12,384 INFO L87 Difference]: Start difference. First operand 457 states and 1425 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:12,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:12,708 INFO L93 Difference]: Finished difference Result 761 states and 2314 transitions. [2021-06-12 20:07:12,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:07:12,708 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:12,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:12,709 INFO L225 Difference]: With dead ends: 761 [2021-06-12 20:07:12,709 INFO L226 Difference]: Without dead ends: 701 [2021-06-12 20:07:12,709 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 258.9ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:07:12,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-06-12 20:07:12,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 457. [2021-06-12 20:07:12,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 3.120614035087719) internal successors, (1423), 456 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:12,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1423 transitions. [2021-06-12 20:07:12,719 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1423 transitions. Word has length 21 [2021-06-12 20:07:12,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:12,719 INFO L482 AbstractCegarLoop]: Abstraction has 457 states and 1423 transitions. [2021-06-12 20:07:12,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:12,719 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1423 transitions. [2021-06-12 20:07:12,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:12,719 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:12,719 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:12,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 929 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5287 [2021-06-12 20:07:12,920 INFO L430 AbstractCegarLoop]: === Iteration 941 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:12,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:12,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1989960047, now seen corresponding path program 929 times [2021-06-12 20:07:12,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:12,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544385619] [2021-06-12 20:07:12,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:13,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:13,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:13,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544385619] [2021-06-12 20:07:13,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544385619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:13,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39464070] [2021-06-12 20:07:13,014 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 930 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 930 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:13,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:07:13,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:13,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:13,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:13,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:13,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:13,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:13,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:13,119 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:13,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:13,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:13,131 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:31 [2021-06-12 20:07:13,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:13,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:13,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:13,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:13,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:13,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:13,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:13,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:13,192 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:13,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:13,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:13,206 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:13 [2021-06-12 20:07:13,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:13,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39464070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:13,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:13,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:13,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491334579] [2021-06-12 20:07:13,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:13,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:13,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:13,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:13,252 INFO L87 Difference]: Start difference. First operand 457 states and 1423 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:13,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:13,642 INFO L93 Difference]: Finished difference Result 737 states and 2270 transitions. [2021-06-12 20:07:13,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:07:13,642 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:13,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:13,643 INFO L225 Difference]: With dead ends: 737 [2021-06-12 20:07:13,643 INFO L226 Difference]: Without dead ends: 714 [2021-06-12 20:07:13,643 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 320.7ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:07:13,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-06-12 20:07:13,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 455. [2021-06-12 20:07:13,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.1233480176211454) internal successors, (1418), 454 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:13,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1418 transitions. [2021-06-12 20:07:13,652 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1418 transitions. Word has length 21 [2021-06-12 20:07:13,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:13,652 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1418 transitions. [2021-06-12 20:07:13,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:13,652 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1418 transitions. [2021-06-12 20:07:13,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:13,653 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:13,653 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:13,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 930 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5297 [2021-06-12 20:07:13,853 INFO L430 AbstractCegarLoop]: === Iteration 942 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:13,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:13,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1104161767, now seen corresponding path program 930 times [2021-06-12 20:07:13,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:13,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792216021] [2021-06-12 20:07:13,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:13,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:13,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:13,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792216021] [2021-06-12 20:07:13,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792216021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:13,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304129810] [2021-06-12 20:07:13,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 931 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 931 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:13,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:07:13,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:13,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:13,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:14,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:14,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:14,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:14,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:14,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:07:14,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 20:07:14,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:07:14,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:14,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:14,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:14,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:14,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:14,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:14,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:14,103 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:14,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:14,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:14,117 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:61, output treesize:13 [2021-06-12 20:07:14,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:14,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304129810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:14,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:14,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:14,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606146679] [2021-06-12 20:07:14,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:14,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:14,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:14,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:14,163 INFO L87 Difference]: Start difference. First operand 455 states and 1418 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:14,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:14,567 INFO L93 Difference]: Finished difference Result 732 states and 2245 transitions. [2021-06-12 20:07:14,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:07:14,568 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:14,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:14,568 INFO L225 Difference]: With dead ends: 732 [2021-06-12 20:07:14,569 INFO L226 Difference]: Without dead ends: 705 [2021-06-12 20:07:14,569 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 296.3ms TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:07:14,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-06-12 20:07:14,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 455. [2021-06-12 20:07:14,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.1233480176211454) internal successors, (1418), 454 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:14,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1418 transitions. [2021-06-12 20:07:14,574 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1418 transitions. Word has length 21 [2021-06-12 20:07:14,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:14,574 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1418 transitions. [2021-06-12 20:07:14,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:14,574 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1418 transitions. [2021-06-12 20:07:14,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:14,574 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:14,574 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:14,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5305,931 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:14,775 INFO L430 AbstractCegarLoop]: === Iteration 943 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:14,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:14,775 INFO L82 PathProgramCache]: Analyzing trace with hash 819899083, now seen corresponding path program 931 times [2021-06-12 20:07:14,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:14,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700096663] [2021-06-12 20:07:14,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:14,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:14,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700096663] [2021-06-12 20:07:14,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700096663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:14,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843898692] [2021-06-12 20:07:14,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 932 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 932 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:14,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:14,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:14,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:14,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:14,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:14,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:14,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:14,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:14,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:14,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:14,986 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:31 [2021-06-12 20:07:15,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:15,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:15,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:15,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:15,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:15,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:15,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:15,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:15,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:15,046 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:15,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:15,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:15,061 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:13 [2021-06-12 20:07:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:15,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843898692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:15,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:15,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:15,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60889502] [2021-06-12 20:07:15,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:15,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:15,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:15,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:15,110 INFO L87 Difference]: Start difference. First operand 455 states and 1418 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:15,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:15,515 INFO L93 Difference]: Finished difference Result 726 states and 2219 transitions. [2021-06-12 20:07:15,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:07:15,515 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:15,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:15,516 INFO L225 Difference]: With dead ends: 726 [2021-06-12 20:07:15,516 INFO L226 Difference]: Without dead ends: 699 [2021-06-12 20:07:15,516 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 316.2ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:07:15,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-06-12 20:07:15,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 467. [2021-06-12 20:07:15,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.11587982832618) internal successors, (1452), 466 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:15,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1452 transitions. [2021-06-12 20:07:15,521 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1452 transitions. Word has length 21 [2021-06-12 20:07:15,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:15,521 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1452 transitions. [2021-06-12 20:07:15,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:15,522 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1452 transitions. [2021-06-12 20:07:15,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:15,522 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:15,522 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:15,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 932 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5311 [2021-06-12 20:07:15,723 INFO L430 AbstractCegarLoop]: === Iteration 944 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:15,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:15,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1788676373, now seen corresponding path program 932 times [2021-06-12 20:07:15,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:15,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398093385] [2021-06-12 20:07:15,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:15,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:15,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:15,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398093385] [2021-06-12 20:07:15,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398093385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:15,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147935393] [2021-06-12 20:07:15,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 933 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 933 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:15,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:07:15,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:15,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:15,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:15,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:15,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:15,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:15,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:15,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:15,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:15,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:15,942 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:31 [2021-06-12 20:07:15,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:15,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:15,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:16,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:16,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:16,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:16,005 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:16,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:16,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:16,012 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:7 [2021-06-12 20:07:16,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:16,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147935393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:16,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:16,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:16,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532722617] [2021-06-12 20:07:16,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:16,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:16,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:16,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:16,042 INFO L87 Difference]: Start difference. First operand 467 states and 1452 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:16,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:16,329 INFO L93 Difference]: Finished difference Result 643 states and 1971 transitions. [2021-06-12 20:07:16,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:07:16,329 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:16,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:16,330 INFO L225 Difference]: With dead ends: 643 [2021-06-12 20:07:16,330 INFO L226 Difference]: Without dead ends: 622 [2021-06-12 20:07:16,330 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 254.0ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:07:16,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-06-12 20:07:16,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 453. [2021-06-12 20:07:16,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 3.1261061946902653) internal successors, (1413), 452 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:16,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1413 transitions. [2021-06-12 20:07:16,335 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1413 transitions. Word has length 21 [2021-06-12 20:07:16,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:16,335 INFO L482 AbstractCegarLoop]: Abstraction has 453 states and 1413 transitions. [2021-06-12 20:07:16,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:16,335 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1413 transitions. [2021-06-12 20:07:16,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:16,335 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:16,335 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:16,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5323,933 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:16,536 INFO L430 AbstractCegarLoop]: === Iteration 945 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:16,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:16,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1517534615, now seen corresponding path program 933 times [2021-06-12 20:07:16,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:16,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433248404] [2021-06-12 20:07:16,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:16,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:16,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:16,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:16,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433248404] [2021-06-12 20:07:16,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433248404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:16,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959918452] [2021-06-12 20:07:16,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 934 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 934 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:16,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:07:16,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:16,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:16,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:16,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:16,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:16,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:16,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:16,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:16,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:16,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:16,725 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:07:16,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:16,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:16,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:16,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:16,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:16,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:07:16,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:16,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:16,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:16,837 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:9 [2021-06-12 20:07:16,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:16,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959918452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:16,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:16,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:07:16,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327456729] [2021-06-12 20:07:16,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:07:16,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:16,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:07:16,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:16,845 INFO L87 Difference]: Start difference. First operand 453 states and 1413 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:16,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:16,983 INFO L93 Difference]: Finished difference Result 579 states and 1785 transitions. [2021-06-12 20:07:16,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:16,983 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:16,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:16,984 INFO L225 Difference]: With dead ends: 579 [2021-06-12 20:07:16,984 INFO L226 Difference]: Without dead ends: 557 [2021-06-12 20:07:16,984 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 162.2ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:16,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-06-12 20:07:16,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 460. [2021-06-12 20:07:16,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.139433551198257) internal successors, (1441), 459 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:16,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1441 transitions. [2021-06-12 20:07:16,989 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1441 transitions. Word has length 21 [2021-06-12 20:07:16,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:16,989 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1441 transitions. [2021-06-12 20:07:16,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:16,989 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1441 transitions. [2021-06-12 20:07:16,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:16,989 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:16,989 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:17,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 934 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5330 [2021-06-12 20:07:17,190 INFO L430 AbstractCegarLoop]: === Iteration 946 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:17,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:17,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1015743279, now seen corresponding path program 934 times [2021-06-12 20:07:17,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:17,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581534173] [2021-06-12 20:07:17,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:17,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:17,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:17,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581534173] [2021-06-12 20:07:17,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581534173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:17,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646760031] [2021-06-12 20:07:17,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 935 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 935 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:17,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:07:17,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:17,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:17,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:17,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:17,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:17,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:17,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:17,361 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:17,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:17,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:17,379 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:07:17,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:17,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:17,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:17,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:17,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:17,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:07:17,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:17,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:17,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:17,463 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 20:07:17,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:17,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646760031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:17,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:17,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:07:17,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588204290] [2021-06-12 20:07:17,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:17,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:17,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:17,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:17,477 INFO L87 Difference]: Start difference. First operand 460 states and 1441 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:17,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:17,629 INFO L93 Difference]: Finished difference Result 570 states and 1761 transitions. [2021-06-12 20:07:17,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:17,629 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:17,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:17,630 INFO L225 Difference]: With dead ends: 570 [2021-06-12 20:07:17,630 INFO L226 Difference]: Without dead ends: 548 [2021-06-12 20:07:17,630 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 148.0ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:17,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-06-12 20:07:17,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 457. [2021-06-12 20:07:17,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 3.133771929824561) internal successors, (1429), 456 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:17,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1429 transitions. [2021-06-12 20:07:17,635 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1429 transitions. Word has length 21 [2021-06-12 20:07:17,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:17,635 INFO L482 AbstractCegarLoop]: Abstraction has 457 states and 1429 transitions. [2021-06-12 20:07:17,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:17,635 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1429 transitions. [2021-06-12 20:07:17,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:17,635 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:17,635 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:17,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5338,935 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:17,836 INFO L430 AbstractCegarLoop]: === Iteration 947 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:17,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:17,836 INFO L82 PathProgramCache]: Analyzing trace with hash 2142858733, now seen corresponding path program 935 times [2021-06-12 20:07:17,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:17,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646383700] [2021-06-12 20:07:17,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:17,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:17,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646383700] [2021-06-12 20:07:17,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646383700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:17,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813907886] [2021-06-12 20:07:17,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 936 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 936 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:17,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:07:17,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:17,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:17,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:18,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:18,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:18,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:18,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:18,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:18,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:18,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:18,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:18,025 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:07:18,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:18,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:18,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:18,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:18,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:18,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:18,143 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:18,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:18,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:18,151 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:7 [2021-06-12 20:07:18,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:18,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813907886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:18,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:18,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:07:18,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169075507] [2021-06-12 20:07:18,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:07:18,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:18,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:07:18,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:18,159 INFO L87 Difference]: Start difference. First operand 457 states and 1429 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:18,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:18,301 INFO L93 Difference]: Finished difference Result 558 states and 1710 transitions. [2021-06-12 20:07:18,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:18,301 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:18,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:18,302 INFO L225 Difference]: With dead ends: 558 [2021-06-12 20:07:18,302 INFO L226 Difference]: Without dead ends: 539 [2021-06-12 20:07:18,302 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 188.2ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:07:18,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-12 20:07:18,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 463. [2021-06-12 20:07:18,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.142857142857143) internal successors, (1452), 462 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:18,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1452 transitions. [2021-06-12 20:07:18,307 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1452 transitions. Word has length 21 [2021-06-12 20:07:18,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:18,307 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1452 transitions. [2021-06-12 20:07:18,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:18,307 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1452 transitions. [2021-06-12 20:07:18,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:18,307 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:18,307 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:18,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 936 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5342 [2021-06-12 20:07:18,508 INFO L430 AbstractCegarLoop]: === Iteration 948 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:18,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:18,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1920650121, now seen corresponding path program 936 times [2021-06-12 20:07:18,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:18,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058590051] [2021-06-12 20:07:18,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:18,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:18,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058590051] [2021-06-12 20:07:18,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058590051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:18,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913015953] [2021-06-12 20:07:18,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 937 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 937 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:18,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:07:18,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:18,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:18,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:18,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:18,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:18,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:18,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:18,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:07:18,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 20:07:18,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:07:18,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:18,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:18,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:18,781 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:18,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:18,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:18,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:18,795 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:18,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:18,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:18,806 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:51, output treesize:5 [2021-06-12 20:07:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:18,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913015953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:18,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:18,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:07:18,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267251449] [2021-06-12 20:07:18,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:07:18,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:18,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:07:18,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:18,814 INFO L87 Difference]: Start difference. First operand 463 states and 1452 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:18,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:18,949 INFO L93 Difference]: Finished difference Result 567 states and 1744 transitions. [2021-06-12 20:07:18,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:18,949 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:18,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:18,950 INFO L225 Difference]: With dead ends: 567 [2021-06-12 20:07:18,950 INFO L226 Difference]: Without dead ends: 534 [2021-06-12 20:07:18,950 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 145.1ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:18,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-12 20:07:18,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 463. [2021-06-12 20:07:18,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.132034632034632) internal successors, (1447), 462 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:18,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1447 transitions. [2021-06-12 20:07:18,955 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1447 transitions. Word has length 21 [2021-06-12 20:07:18,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:18,955 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1447 transitions. [2021-06-12 20:07:18,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:18,955 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1447 transitions. [2021-06-12 20:07:18,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:18,956 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:18,956 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:19,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5351,937 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:19,156 INFO L430 AbstractCegarLoop]: === Iteration 949 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:19,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:19,156 INFO L82 PathProgramCache]: Analyzing trace with hash -465716723, now seen corresponding path program 937 times [2021-06-12 20:07:19,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:19,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98070480] [2021-06-12 20:07:19,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:19,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:19,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:19,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98070480] [2021-06-12 20:07:19,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98070480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:19,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754982978] [2021-06-12 20:07:19,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 938 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 938 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:19,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:19,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:19,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:19,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:19,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:19,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:19,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:19,339 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:19,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:19,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:19,353 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:07:19,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:19,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:19,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:19,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:19,440 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:19,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:19,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:19,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:19,457 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:19,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:19,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:19,473 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:13 [2021-06-12 20:07:19,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:19,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754982978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:19,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:19,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:07:19,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022259085] [2021-06-12 20:07:19,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:07:19,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:19,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:07:19,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:19,505 INFO L87 Difference]: Start difference. First operand 463 states and 1447 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:19,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:19,666 INFO L93 Difference]: Finished difference Result 586 states and 1809 transitions. [2021-06-12 20:07:19,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:19,666 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:19,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:19,667 INFO L225 Difference]: With dead ends: 586 [2021-06-12 20:07:19,667 INFO L226 Difference]: Without dead ends: 563 [2021-06-12 20:07:19,667 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:19,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-12 20:07:19,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 463. [2021-06-12 20:07:19,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.132034632034632) internal successors, (1447), 462 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:19,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1447 transitions. [2021-06-12 20:07:19,672 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1447 transitions. Word has length 21 [2021-06-12 20:07:19,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:19,672 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1447 transitions. [2021-06-12 20:07:19,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:19,672 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1447 transitions. [2021-06-12 20:07:19,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:19,672 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:19,672 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:19,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 938 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5361 [2021-06-12 20:07:19,873 INFO L430 AbstractCegarLoop]: === Iteration 950 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:19,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:19,873 INFO L82 PathProgramCache]: Analyzing trace with hash -749979407, now seen corresponding path program 938 times [2021-06-12 20:07:19,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:19,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021030353] [2021-06-12 20:07:19,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:19,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:19,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:19,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:19,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021030353] [2021-06-12 20:07:19,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021030353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:19,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459419486] [2021-06-12 20:07:19,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 939 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 939 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:19,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:07:19,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:19,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:19,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:20,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:20,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:20,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:20,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:20,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:07:20,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 20:07:20,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:07:20,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:20,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:20,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:20,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:20,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:20,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:20,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:20,145 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:20,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:20,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:20,164 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:61, output treesize:13 [2021-06-12 20:07:20,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:20,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459419486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:20,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:20,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:07:20,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338807990] [2021-06-12 20:07:20,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:20,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:20,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:20,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:20,188 INFO L87 Difference]: Start difference. First operand 463 states and 1447 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:20,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:20,355 INFO L93 Difference]: Finished difference Result 557 states and 1716 transitions. [2021-06-12 20:07:20,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:20,356 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:20,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:20,356 INFO L225 Difference]: With dead ends: 557 [2021-06-12 20:07:20,356 INFO L226 Difference]: Without dead ends: 530 [2021-06-12 20:07:20,356 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 148.7ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:20,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-06-12 20:07:20,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 461. [2021-06-12 20:07:20,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.134782608695652) internal successors, (1442), 460 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:20,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1442 transitions. [2021-06-12 20:07:20,365 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1442 transitions. Word has length 21 [2021-06-12 20:07:20,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:20,366 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1442 transitions. [2021-06-12 20:07:20,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:20,366 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1442 transitions. [2021-06-12 20:07:20,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:20,366 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:20,366 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:20,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 939 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5372 [2021-06-12 20:07:20,567 INFO L430 AbstractCegarLoop]: === Iteration 951 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:20,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:20,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1831122191, now seen corresponding path program 939 times [2021-06-12 20:07:20,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:20,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193852043] [2021-06-12 20:07:20,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:20,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:20,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193852043] [2021-06-12 20:07:20,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193852043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:20,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140708735] [2021-06-12 20:07:20,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 940 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 940 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:20,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:07:20,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:20,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:07:20,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:20,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:20,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:20,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:20,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:20,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:20,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:20,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:20,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:20,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:20,783 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:20,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:20,786 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:20,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:20,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:20,824 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:125, output treesize:93 [2021-06-12 20:07:20,969 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-06-12 20:07:20,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:20,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:20,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:20,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:20,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:20,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:20,976 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:21,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:21,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:21,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:21,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:21,006 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:21,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:21,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:21,009 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:21,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:21,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:21,036 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:89, output treesize:31 [2021-06-12 20:07:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:21,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140708735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:21,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:21,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:21,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612436630] [2021-06-12 20:07:21,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:21,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:21,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:21,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:21,115 INFO L87 Difference]: Start difference. First operand 461 states and 1442 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:21,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:21,490 INFO L93 Difference]: Finished difference Result 662 states and 2042 transitions. [2021-06-12 20:07:21,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:07:21,490 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:21,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:21,491 INFO L225 Difference]: With dead ends: 662 [2021-06-12 20:07:21,491 INFO L226 Difference]: Without dead ends: 643 [2021-06-12 20:07:21,491 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 403.1ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:07:21,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-06-12 20:07:21,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 457. [2021-06-12 20:07:21,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 3.1271929824561404) internal successors, (1426), 456 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:21,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1426 transitions. [2021-06-12 20:07:21,496 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1426 transitions. Word has length 21 [2021-06-12 20:07:21,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:21,496 INFO L482 AbstractCegarLoop]: Abstraction has 457 states and 1426 transitions. [2021-06-12 20:07:21,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:21,496 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1426 transitions. [2021-06-12 20:07:21,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:21,497 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:21,497 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:21,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5379,940 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:21,697 INFO L430 AbstractCegarLoop]: === Iteration 952 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:21,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:21,697 INFO L82 PathProgramCache]: Analyzing trace with hash 102160303, now seen corresponding path program 940 times [2021-06-12 20:07:21,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:21,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567651862] [2021-06-12 20:07:21,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:21,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:21,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:21,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567651862] [2021-06-12 20:07:21,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567651862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:21,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647865938] [2021-06-12 20:07:21,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 941 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 941 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:21,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:07:21,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:21,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:21,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:21,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:21,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:21,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:21,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:21,872 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:21,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:21,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:21,890 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:07:21,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:21,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:21,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:21,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:21,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:21,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:22,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:22,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:22,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:07:22,005 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:22,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:22,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:22,020 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:15 [2021-06-12 20:07:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:22,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647865938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:22,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:22,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:07:22,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660193603] [2021-06-12 20:07:22,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:07:22,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:22,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:07:22,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:22,047 INFO L87 Difference]: Start difference. First operand 457 states and 1426 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:22,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:22,232 INFO L93 Difference]: Finished difference Result 588 states and 1813 transitions. [2021-06-12 20:07:22,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:22,233 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:22,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:22,233 INFO L225 Difference]: With dead ends: 588 [2021-06-12 20:07:22,233 INFO L226 Difference]: Without dead ends: 559 [2021-06-12 20:07:22,234 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 174.2ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:22,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-12 20:07:22,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 457. [2021-06-12 20:07:22,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 3.1271929824561404) internal successors, (1426), 456 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:22,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1426 transitions. [2021-06-12 20:07:22,238 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1426 transitions. Word has length 21 [2021-06-12 20:07:22,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:22,238 INFO L482 AbstractCegarLoop]: Abstraction has 457 states and 1426 transitions. [2021-06-12 20:07:22,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:22,238 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1426 transitions. [2021-06-12 20:07:22,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:22,239 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:22,239 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:22,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5390,941 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:22,439 INFO L430 AbstractCegarLoop]: === Iteration 953 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:22,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:22,440 INFO L82 PathProgramCache]: Analyzing trace with hash -992538615, now seen corresponding path program 941 times [2021-06-12 20:07:22,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:22,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881992576] [2021-06-12 20:07:22,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:22,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:22,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:22,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881992576] [2021-06-12 20:07:22,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881992576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:22,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229650779] [2021-06-12 20:07:22,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 942 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 942 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:22,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:07:22,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:22,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:22,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:22,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:22,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:22,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:22,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:22,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:07:22,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 20:07:22,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:22,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:22,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:22,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:22,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:07:22,703 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:22,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:22,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:22,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:22,719 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:22,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:22,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:22,739 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:13 [2021-06-12 20:07:22,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:22,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229650779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:22,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:22,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:22,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381408748] [2021-06-12 20:07:22,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:22,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:22,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:22,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:22,788 INFO L87 Difference]: Start difference. First operand 457 states and 1426 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:23,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:23,173 INFO L93 Difference]: Finished difference Result 816 states and 2477 transitions. [2021-06-12 20:07:23,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:07:23,174 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:23,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:23,175 INFO L225 Difference]: With dead ends: 816 [2021-06-12 20:07:23,175 INFO L226 Difference]: Without dead ends: 762 [2021-06-12 20:07:23,175 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 351.0ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:07:23,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-06-12 20:07:23,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 458. [2021-06-12 20:07:23,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.148796498905908) internal successors, (1439), 457 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:23,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1439 transitions. [2021-06-12 20:07:23,180 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1439 transitions. Word has length 21 [2021-06-12 20:07:23,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:23,180 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1439 transitions. [2021-06-12 20:07:23,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:23,180 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1439 transitions. [2021-06-12 20:07:23,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:23,181 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:23,181 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:23,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5402,942 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:23,381 INFO L430 AbstractCegarLoop]: === Iteration 954 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:23,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:23,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1616824379, now seen corresponding path program 942 times [2021-06-12 20:07:23,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:23,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151653041] [2021-06-12 20:07:23,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:23,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:23,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151653041] [2021-06-12 20:07:23,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151653041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:23,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280154362] [2021-06-12 20:07:23,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 943 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 943 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:23,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:07:23,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:23,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:23,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:23,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:23,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:23,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:23,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:23,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:23,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:23,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:23,574 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:07:23,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:23,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:23,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:23,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:23,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:23,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:23,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:23,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:23,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:07:23,645 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:23,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:23,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:23,662 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:67, output treesize:21 [2021-06-12 20:07:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:23,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280154362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:23,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:23,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:07:23,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377559671] [2021-06-12 20:07:23,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:23,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:23,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:23,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:23,695 INFO L87 Difference]: Start difference. First operand 458 states and 1439 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:23,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:23,855 INFO L93 Difference]: Finished difference Result 596 states and 1843 transitions. [2021-06-12 20:07:23,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:23,856 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:23,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:23,856 INFO L225 Difference]: With dead ends: 596 [2021-06-12 20:07:23,857 INFO L226 Difference]: Without dead ends: 567 [2021-06-12 20:07:23,857 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 156.0ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:23,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-12 20:07:23,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 458. [2021-06-12 20:07:23,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.148796498905908) internal successors, (1439), 457 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:23,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1439 transitions. [2021-06-12 20:07:23,861 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1439 transitions. Word has length 21 [2021-06-12 20:07:23,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:23,861 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1439 transitions. [2021-06-12 20:07:23,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:23,861 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1439 transitions. [2021-06-12 20:07:23,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:23,862 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:23,862 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:24,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 943 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5415 [2021-06-12 20:07:24,062 INFO L430 AbstractCegarLoop]: === Iteration 955 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:24,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:24,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1319557969, now seen corresponding path program 943 times [2021-06-12 20:07:24,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:24,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966287074] [2021-06-12 20:07:24,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:24,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:24,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966287074] [2021-06-12 20:07:24,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966287074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:24,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589058713] [2021-06-12 20:07:24,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 944 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 944 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:24,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:24,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:24,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:24,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:24,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:24,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:24,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:24,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:24,254 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:24,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:24,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:24,268 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:07:24,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:24,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:24,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:24,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:24,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:24,317 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:24,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:24,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:24,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:24,337 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:24,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:24,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:24,354 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:65, output treesize:19 [2021-06-12 20:07:24,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:24,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589058713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:24,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:24,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:24,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229043518] [2021-06-12 20:07:24,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:24,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:24,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:24,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:24,431 INFO L87 Difference]: Start difference. First operand 458 states and 1439 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:24,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:24,798 INFO L93 Difference]: Finished difference Result 746 states and 2292 transitions. [2021-06-12 20:07:24,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:07:24,798 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:24,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:24,799 INFO L225 Difference]: With dead ends: 746 [2021-06-12 20:07:24,799 INFO L226 Difference]: Without dead ends: 723 [2021-06-12 20:07:24,799 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 370.8ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:07:24,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-06-12 20:07:24,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 458. [2021-06-12 20:07:24,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.148796498905908) internal successors, (1439), 457 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:24,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1439 transitions. [2021-06-12 20:07:24,804 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1439 transitions. Word has length 21 [2021-06-12 20:07:24,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:24,804 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1439 transitions. [2021-06-12 20:07:24,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:24,805 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1439 transitions. [2021-06-12 20:07:24,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:24,805 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:24,805 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:25,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 944 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5421 [2021-06-12 20:07:25,006 INFO L430 AbstractCegarLoop]: === Iteration 956 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:25,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:25,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1686814705, now seen corresponding path program 944 times [2021-06-12 20:07:25,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:25,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420996770] [2021-06-12 20:07:25,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:25,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:25,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:25,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420996770] [2021-06-12 20:07:25,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420996770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:25,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404294333] [2021-06-12 20:07:25,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 945 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 945 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:25,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:07:25,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:25,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:25,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:25,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:25,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:25,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:25,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:25,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:07:25,185 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 20:07:25,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:25,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:25,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:25,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:25,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:07:25,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:25,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:25,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:25,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:25,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:25,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:25,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:25,280 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:67, output treesize:19 [2021-06-12 20:07:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:25,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404294333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:25,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:25,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:25,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71628818] [2021-06-12 20:07:25,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:25,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:25,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:25,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:25,379 INFO L87 Difference]: Start difference. First operand 458 states and 1439 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:25,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:25,861 INFO L93 Difference]: Finished difference Result 725 states and 2211 transitions. [2021-06-12 20:07:25,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:07:25,861 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:25,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:25,862 INFO L225 Difference]: With dead ends: 725 [2021-06-12 20:07:25,862 INFO L226 Difference]: Without dead ends: 698 [2021-06-12 20:07:25,862 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 350.2ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:07:25,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-06-12 20:07:25,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 453. [2021-06-12 20:07:25,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 3.1261061946902653) internal successors, (1413), 452 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:25,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1413 transitions. [2021-06-12 20:07:25,867 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1413 transitions. Word has length 21 [2021-06-12 20:07:25,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:25,867 INFO L482 AbstractCegarLoop]: Abstraction has 453 states and 1413 transitions. [2021-06-12 20:07:25,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:25,867 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1413 transitions. [2021-06-12 20:07:25,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:25,868 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:25,868 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:26,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 945 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5432 [2021-06-12 20:07:26,068 INFO L430 AbstractCegarLoop]: === Iteration 957 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:26,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:26,069 INFO L82 PathProgramCache]: Analyzing trace with hash -220437201, now seen corresponding path program 945 times [2021-06-12 20:07:26,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:26,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694332783] [2021-06-12 20:07:26,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:26,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:26,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694332783] [2021-06-12 20:07:26,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694332783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:26,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705887492] [2021-06-12 20:07:26,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 946 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 946 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:26,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:07:26,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:26,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:26,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:26,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:26,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:26,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:26,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:26,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:26,251 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:26,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:26,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:26,270 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:07:26,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:26,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:26,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:26,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:26,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:26,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:07:26,344 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:26,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:26,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:26,352 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-06-12 20:07:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:26,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705887492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:26,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:26,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:07:26,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096484754] [2021-06-12 20:07:26,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:26,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:26,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:26,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:26,366 INFO L87 Difference]: Start difference. First operand 453 states and 1413 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:26,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:26,521 INFO L93 Difference]: Finished difference Result 569 states and 1754 transitions. [2021-06-12 20:07:26,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:26,522 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:26,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:26,522 INFO L225 Difference]: With dead ends: 569 [2021-06-12 20:07:26,522 INFO L226 Difference]: Without dead ends: 547 [2021-06-12 20:07:26,522 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:26,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-12 20:07:26,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 456. [2021-06-12 20:07:26,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.131868131868132) internal successors, (1425), 455 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:26,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1425 transitions. [2021-06-12 20:07:26,527 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1425 transitions. Word has length 21 [2021-06-12 20:07:26,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:26,527 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1425 transitions. [2021-06-12 20:07:26,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:26,527 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1425 transitions. [2021-06-12 20:07:26,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:26,527 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:26,527 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:26,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5444,946 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:26,728 INFO L430 AbstractCegarLoop]: === Iteration 958 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:26,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:26,728 INFO L82 PathProgramCache]: Analyzing trace with hash 404886917, now seen corresponding path program 946 times [2021-06-12 20:07:26,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:26,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624344162] [2021-06-12 20:07:26,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:26,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:26,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624344162] [2021-06-12 20:07:26,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624344162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:26,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881382672] [2021-06-12 20:07:26,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 947 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 947 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:26,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:07:26,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:26,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:26,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:26,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:26,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:26,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:26,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:26,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:07:26,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 20:07:26,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:07:26,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:26,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:26,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:26,961 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:26,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:26,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:26,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:26,983 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:26,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:26,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:26,997 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:61, output treesize:13 [2021-06-12 20:07:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:27,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881382672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:27,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:27,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:07:27,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529079982] [2021-06-12 20:07:27,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:27,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:27,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:27,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:27,016 INFO L87 Difference]: Start difference. First operand 456 states and 1425 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:27,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:27,191 INFO L93 Difference]: Finished difference Result 562 states and 1724 transitions. [2021-06-12 20:07:27,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:27,192 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:27,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:27,192 INFO L225 Difference]: With dead ends: 562 [2021-06-12 20:07:27,192 INFO L226 Difference]: Without dead ends: 535 [2021-06-12 20:07:27,192 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 132.9ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:27,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-12 20:07:27,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 456. [2021-06-12 20:07:27,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.1274725274725275) internal successors, (1423), 455 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:27,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1423 transitions. [2021-06-12 20:07:27,197 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1423 transitions. Word has length 21 [2021-06-12 20:07:27,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:27,197 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1423 transitions. [2021-06-12 20:07:27,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:27,197 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1423 transitions. [2021-06-12 20:07:27,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:27,197 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:27,197 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:27,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5448,947 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:27,398 INFO L430 AbstractCegarLoop]: === Iteration 959 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:27,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:27,398 INFO L82 PathProgramCache]: Analyzing trace with hash 120624233, now seen corresponding path program 947 times [2021-06-12 20:07:27,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:27,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964150926] [2021-06-12 20:07:27,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:27,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:27,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964150926] [2021-06-12 20:07:27,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964150926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:27,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971077899] [2021-06-12 20:07:27,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 948 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 948 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:27,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:07:27,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:27,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:27,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:27,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:27,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:27,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:27,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:27,570 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:27,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:27,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:27,585 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:07:27,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:27,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:27,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:27,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:27,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:27,673 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:27,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:27,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:27,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:27,690 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:27,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:27,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:27,704 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:13 [2021-06-12 20:07:27,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:27,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971077899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:27,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:27,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:07:27,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369850247] [2021-06-12 20:07:27,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:07:27,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:27,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:07:27,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:27,734 INFO L87 Difference]: Start difference. First operand 456 states and 1423 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:27,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:27,986 INFO L93 Difference]: Finished difference Result 615 states and 1871 transitions. [2021-06-12 20:07:27,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:07:27,986 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:27,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:27,987 INFO L225 Difference]: With dead ends: 615 [2021-06-12 20:07:27,987 INFO L226 Difference]: Without dead ends: 588 [2021-06-12 20:07:27,987 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 186.8ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:27,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-12 20:07:27,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 469. [2021-06-12 20:07:27,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.123931623931624) internal successors, (1462), 468 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:27,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1462 transitions. [2021-06-12 20:07:27,992 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1462 transitions. Word has length 21 [2021-06-12 20:07:27,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:27,992 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1462 transitions. [2021-06-12 20:07:27,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:27,992 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1462 transitions. [2021-06-12 20:07:27,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:27,993 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:27,993 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:28,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 948 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5454 [2021-06-12 20:07:28,193 INFO L430 AbstractCegarLoop]: === Iteration 960 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:28,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:28,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1807016073, now seen corresponding path program 948 times [2021-06-12 20:07:28,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:28,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938745612] [2021-06-12 20:07:28,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:28,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:28,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938745612] [2021-06-12 20:07:28,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938745612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:28,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706024198] [2021-06-12 20:07:28,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 949 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 949 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:28,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:07:28,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:28,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:28,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:28,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:28,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:28,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:28,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:28,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:28,364 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:28,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:28,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:28,378 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:07:28,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:28,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:28,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:28,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:28,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:28,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:28,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:28,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:28,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:28,495 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:7 [2021-06-12 20:07:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:28,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706024198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:28,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:28,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:07:28,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617500071] [2021-06-12 20:07:28,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:07:28,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:28,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:07:28,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:28,507 INFO L87 Difference]: Start difference. First operand 469 states and 1462 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:28,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:28,702 INFO L93 Difference]: Finished difference Result 544 states and 1664 transitions. [2021-06-12 20:07:28,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:28,702 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:28,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:28,703 INFO L225 Difference]: With dead ends: 544 [2021-06-12 20:07:28,703 INFO L226 Difference]: Without dead ends: 523 [2021-06-12 20:07:28,703 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 188.4ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:07:28,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-06-12 20:07:28,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 459. [2021-06-12 20:07:28,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 3.1331877729257642) internal successors, (1435), 458 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:28,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1435 transitions. [2021-06-12 20:07:28,708 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1435 transitions. Word has length 21 [2021-06-12 20:07:28,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:28,708 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 1435 transitions. [2021-06-12 20:07:28,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:28,708 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1435 transitions. [2021-06-12 20:07:28,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:28,708 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:28,708 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:28,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 949 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5471 [2021-06-12 20:07:28,909 INFO L430 AbstractCegarLoop]: === Iteration 961 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:28,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:28,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1829520445, now seen corresponding path program 949 times [2021-06-12 20:07:28,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:28,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620662356] [2021-06-12 20:07:28,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:28,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:28,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:28,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620662356] [2021-06-12 20:07:28,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620662356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:28,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289471956] [2021-06-12 20:07:28,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 950 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 950 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:29,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:29,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:29,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:29,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:29,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:29,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:29,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:29,080 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:29,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:29,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:29,098 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:39 [2021-06-12 20:07:29,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:29,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:29,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:29,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:29,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:29,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:29,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:29,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:07:29,164 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:29,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:29,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:29,181 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:67, output treesize:21 [2021-06-12 20:07:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:29,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289471956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:29,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:29,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:07:29,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872906409] [2021-06-12 20:07:29,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:29,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:29,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:29,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:29,216 INFO L87 Difference]: Start difference. First operand 459 states and 1435 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:29,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:29,370 INFO L93 Difference]: Finished difference Result 587 states and 1813 transitions. [2021-06-12 20:07:29,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:29,370 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:29,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:29,371 INFO L225 Difference]: With dead ends: 587 [2021-06-12 20:07:29,371 INFO L226 Difference]: Without dead ends: 558 [2021-06-12 20:07:29,371 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:29,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-12 20:07:29,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 459. [2021-06-12 20:07:29,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 3.1331877729257642) internal successors, (1435), 458 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:29,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1435 transitions. [2021-06-12 20:07:29,375 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1435 transitions. Word has length 21 [2021-06-12 20:07:29,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:29,375 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 1435 transitions. [2021-06-12 20:07:29,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:29,376 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1435 transitions. [2021-06-12 20:07:29,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:29,376 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:29,376 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:29,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 950 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5483 [2021-06-12 20:07:29,576 INFO L430 AbstractCegarLoop]: === Iteration 962 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:29,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:29,577 INFO L82 PathProgramCache]: Analyzing trace with hash 2126786855, now seen corresponding path program 950 times [2021-06-12 20:07:29,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:29,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847483430] [2021-06-12 20:07:29,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:29,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:29,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847483430] [2021-06-12 20:07:29,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847483430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:29,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184164923] [2021-06-12 20:07:29,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 951 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 951 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:29,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:07:29,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:29,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:29,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:29,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:29,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:29,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:29,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:29,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:07:29,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 20:07:29,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:07:29,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:29,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:29,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:29,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:29,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:29,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:29,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:29,816 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:29,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:29,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:29,833 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:67, output treesize:19 [2021-06-12 20:07:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:29,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184164923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:29,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:29,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:07:29,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529599967] [2021-06-12 20:07:29,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:29,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:29,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:29,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:29,877 INFO L87 Difference]: Start difference. First operand 459 states and 1435 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:30,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:30,034 INFO L93 Difference]: Finished difference Result 552 states and 1699 transitions. [2021-06-12 20:07:30,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:30,034 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:30,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:30,035 INFO L225 Difference]: With dead ends: 552 [2021-06-12 20:07:30,035 INFO L226 Difference]: Without dead ends: 529 [2021-06-12 20:07:30,035 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 161.0ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:30,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-12 20:07:30,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 458. [2021-06-12 20:07:30,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.1422319474835887) internal successors, (1436), 457 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:30,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1436 transitions. [2021-06-12 20:07:30,039 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1436 transitions. Word has length 21 [2021-06-12 20:07:30,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:30,039 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1436 transitions. [2021-06-12 20:07:30,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:30,040 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1436 transitions. [2021-06-12 20:07:30,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:30,040 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:30,040 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:30,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5489,951 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:30,240 INFO L430 AbstractCegarLoop]: === Iteration 963 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:30,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:30,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1842524171, now seen corresponding path program 951 times [2021-06-12 20:07:30,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:30,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590846784] [2021-06-12 20:07:30,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:30,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:30,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:30,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590846784] [2021-06-12 20:07:30,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590846784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:30,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496154819] [2021-06-12 20:07:30,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 952 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 952 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:30,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:07:30,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:30,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:30,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:30,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:30,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:30,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:30,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:30,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:30,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:30,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:30,456 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:07:30,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:30,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:30,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:30,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:30,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:30,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:30,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:30,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:30,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:30,524 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:30,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:30,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:30,542 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:65, output treesize:19 [2021-06-12 20:07:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:30,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496154819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:30,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:30,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:30,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065179193] [2021-06-12 20:07:30,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:30,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:30,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:30,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:30,618 INFO L87 Difference]: Start difference. First operand 458 states and 1436 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:31,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:31,017 INFO L93 Difference]: Finished difference Result 733 states and 2230 transitions. [2021-06-12 20:07:31,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:07:31,017 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:31,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:31,018 INFO L225 Difference]: With dead ends: 733 [2021-06-12 20:07:31,019 INFO L226 Difference]: Without dead ends: 706 [2021-06-12 20:07:31,019 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 384.6ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:07:31,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-06-12 20:07:31,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 469. [2021-06-12 20:07:31,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.1452991452991452) internal successors, (1472), 468 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:31,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1472 transitions. [2021-06-12 20:07:31,024 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1472 transitions. Word has length 21 [2021-06-12 20:07:31,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:31,024 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1472 transitions. [2021-06-12 20:07:31,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:31,024 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1472 transitions. [2021-06-12 20:07:31,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:31,025 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:31,025 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:31,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 952 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5498 [2021-06-12 20:07:31,225 INFO L430 AbstractCegarLoop]: === Iteration 964 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:31,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:31,225 INFO L82 PathProgramCache]: Analyzing trace with hash -376753335, now seen corresponding path program 952 times [2021-06-12 20:07:31,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:31,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866929230] [2021-06-12 20:07:31,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:31,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:31,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:31,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:31,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866929230] [2021-06-12 20:07:31,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866929230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:31,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978413341] [2021-06-12 20:07:31,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 953 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 953 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:31,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:07:31,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:31,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:31,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:31,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:31,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:31,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:31,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:31,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:31,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:31,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:31,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:31,444 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-06-12 20:07:31,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:31,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:31,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:31,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:31,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:31,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:31,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:31,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:31,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:31,521 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:10 [2021-06-12 20:07:31,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:31,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978413341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:31,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:31,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:31,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61564740] [2021-06-12 20:07:31,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:31,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:31,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:31,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:31,566 INFO L87 Difference]: Start difference. First operand 469 states and 1472 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:31,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:31,873 INFO L93 Difference]: Finished difference Result 656 states and 2010 transitions. [2021-06-12 20:07:31,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:07:31,873 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:31,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:31,874 INFO L225 Difference]: With dead ends: 656 [2021-06-12 20:07:31,874 INFO L226 Difference]: Without dead ends: 635 [2021-06-12 20:07:31,874 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 287.4ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:07:31,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-06-12 20:07:31,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 452. [2021-06-12 20:07:31,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.1241685144124167) internal successors, (1409), 451 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:31,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1409 transitions. [2021-06-12 20:07:31,879 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1409 transitions. Word has length 21 [2021-06-12 20:07:31,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:31,879 INFO L482 AbstractCegarLoop]: Abstraction has 452 states and 1409 transitions. [2021-06-12 20:07:31,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:31,879 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1409 transitions. [2021-06-12 20:07:31,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:31,879 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:31,879 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:32,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5513,953 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:32,080 INFO L430 AbstractCegarLoop]: === Iteration 965 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:32,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:32,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1702446969, now seen corresponding path program 953 times [2021-06-12 20:07:32,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:32,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911194256] [2021-06-12 20:07:32,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:32,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:32,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:32,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911194256] [2021-06-12 20:07:32,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911194256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:32,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890923930] [2021-06-12 20:07:32,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 954 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 954 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:32,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:07:32,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:32,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:32,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:32,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:32,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:32,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:32,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:32,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:32,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:32,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:32,265 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-12 20:07:32,331 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_4]} [2021-06-12 20:07:32,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:32,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:32,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:32,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:32,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:07:32,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:32,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:32,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:32,345 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:9 [2021-06-12 20:07:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:32,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890923930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:32,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:32,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:07:32,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276359811] [2021-06-12 20:07:32,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:07:32,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:32,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:07:32,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:32,354 INFO L87 Difference]: Start difference. First operand 452 states and 1409 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:32,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:32,484 INFO L93 Difference]: Finished difference Result 541 states and 1668 transitions. [2021-06-12 20:07:32,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:32,484 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:32,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:32,485 INFO L225 Difference]: With dead ends: 541 [2021-06-12 20:07:32,485 INFO L226 Difference]: Without dead ends: 519 [2021-06-12 20:07:32,485 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 161.8ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:32,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-12 20:07:32,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 463. [2021-06-12 20:07:32,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.1363636363636362) internal successors, (1449), 462 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:32,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1449 transitions. [2021-06-12 20:07:32,489 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1449 transitions. Word has length 21 [2021-06-12 20:07:32,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:32,489 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1449 transitions. [2021-06-12 20:07:32,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:32,489 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1449 transitions. [2021-06-12 20:07:32,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:32,490 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:32,490 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:32,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 954 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5520 [2021-06-12 20:07:32,690 INFO L430 AbstractCegarLoop]: === Iteration 966 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:32,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:32,691 INFO L82 PathProgramCache]: Analyzing trace with hash 2090728991, now seen corresponding path program 954 times [2021-06-12 20:07:32,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:32,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925312465] [2021-06-12 20:07:32,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:32,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:32,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925312465] [2021-06-12 20:07:32,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925312465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:32,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286265970] [2021-06-12 20:07:32,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 955 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 955 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:32,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:07:32,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:32,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:32,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:32,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:32,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:32,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:32,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:32,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:32,865 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:32,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:32,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:32,882 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:42 [2021-06-12 20:07:32,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:32,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:32,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:32,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:32,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:32,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:07:32,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:32,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:32,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:32,973 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:12 [2021-06-12 20:07:32,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:32,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286265970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:32,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:32,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:07:32,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269298958] [2021-06-12 20:07:32,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:32,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:32,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:32,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:32,992 INFO L87 Difference]: Start difference. First operand 463 states and 1449 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:33,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:33,141 INFO L93 Difference]: Finished difference Result 550 states and 1692 transitions. [2021-06-12 20:07:33,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:33,141 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:33,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:33,142 INFO L225 Difference]: With dead ends: 550 [2021-06-12 20:07:33,142 INFO L226 Difference]: Without dead ends: 528 [2021-06-12 20:07:33,142 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 157.2ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:33,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-12 20:07:33,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 460. [2021-06-12 20:07:33,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.130718954248366) internal successors, (1437), 459 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:33,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1437 transitions. [2021-06-12 20:07:33,147 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1437 transitions. Word has length 21 [2021-06-12 20:07:33,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:33,147 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1437 transitions. [2021-06-12 20:07:33,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:33,147 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1437 transitions. [2021-06-12 20:07:33,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:33,147 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:33,147 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:33,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5526,955 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:33,348 INFO L430 AbstractCegarLoop]: === Iteration 967 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:33,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:33,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1077122851, now seen corresponding path program 955 times [2021-06-12 20:07:33,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:33,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392294225] [2021-06-12 20:07:33,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:33,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:33,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:33,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392294225] [2021-06-12 20:07:33,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392294225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:33,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673967537] [2021-06-12 20:07:33,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 956 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 956 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:33,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:33,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:33,557 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[v_prenex_273]} [2021-06-12 20:07:33,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:33,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:33,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:33,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:33,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:33,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:33,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:33,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:33,589 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:36 [2021-06-12 20:07:33,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:33,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:33,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:33,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:33,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:33,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:33,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:33,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:33,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:33,708 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:35, output treesize:7 [2021-06-12 20:07:33,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:33,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673967537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:33,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:33,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:33,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090042926] [2021-06-12 20:07:33,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:33,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:33,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:33,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:33,736 INFO L87 Difference]: Start difference. First operand 460 states and 1437 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:34,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:34,158 INFO L93 Difference]: Finished difference Result 672 states and 2064 transitions. [2021-06-12 20:07:34,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:07:34,158 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:34,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:34,159 INFO L225 Difference]: With dead ends: 672 [2021-06-12 20:07:34,159 INFO L226 Difference]: Without dead ends: 653 [2021-06-12 20:07:34,159 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 423.3ms TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:07:34,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-06-12 20:07:34,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 470. [2021-06-12 20:07:34,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.1471215351812365) internal successors, (1476), 469 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:34,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1476 transitions. [2021-06-12 20:07:34,164 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1476 transitions. Word has length 21 [2021-06-12 20:07:34,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:34,164 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1476 transitions. [2021-06-12 20:07:34,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:34,164 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1476 transitions. [2021-06-12 20:07:34,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:34,165 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:34,165 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:34,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 956 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5530 [2021-06-12 20:07:34,365 INFO L430 AbstractCegarLoop]: === Iteration 968 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:34,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:34,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1299331463, now seen corresponding path program 956 times [2021-06-12 20:07:34,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:34,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714963685] [2021-06-12 20:07:34,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:34,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:34,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:34,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714963685] [2021-06-12 20:07:34,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714963685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:34,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326938672] [2021-06-12 20:07:34,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 957 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 957 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:34,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:07:34,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:34,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:34,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:34,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:34,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:34,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:34,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:34,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:34,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-06-12 20:07:34,599 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_4]} [2021-06-12 20:07:34,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:07:34,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:34,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:34,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:34,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:34,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:34,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:34,615 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:34,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:34,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:34,624 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:45, output treesize:5 [2021-06-12 20:07:34,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:34,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326938672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:34,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:34,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:34,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791284755] [2021-06-12 20:07:34,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:34,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:34,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:34,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:34,651 INFO L87 Difference]: Start difference. First operand 470 states and 1476 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:34,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:34,924 INFO L93 Difference]: Finished difference Result 753 states and 2299 transitions. [2021-06-12 20:07:34,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:07:34,925 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:34,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:34,925 INFO L225 Difference]: With dead ends: 753 [2021-06-12 20:07:34,925 INFO L226 Difference]: Without dead ends: 693 [2021-06-12 20:07:34,925 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 227.3ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:07:34,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-06-12 20:07:34,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 470. [2021-06-12 20:07:34,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.136460554371002) internal successors, (1471), 469 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:34,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1471 transitions. [2021-06-12 20:07:34,931 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1471 transitions. Word has length 21 [2021-06-12 20:07:34,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:34,931 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1471 transitions. [2021-06-12 20:07:34,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:34,931 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1471 transitions. [2021-06-12 20:07:34,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:34,931 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:34,931 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:35,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5538,957 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:35,132 INFO L430 AbstractCegarLoop]: === Iteration 969 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:35,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:35,132 INFO L82 PathProgramCache]: Analyzing trace with hash 609268989, now seen corresponding path program 957 times [2021-06-12 20:07:35,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:35,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049123922] [2021-06-12 20:07:35,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:35,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:35,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:35,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049123922] [2021-06-12 20:07:35,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049123922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:35,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965997692] [2021-06-12 20:07:35,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 958 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 958 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:35,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:07:35,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:35,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:35,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:35,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:35,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:35,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:35,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:35,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:35,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:35,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:35,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:35,322 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:47, output treesize:31 [2021-06-12 20:07:35,377 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_4]} [2021-06-12 20:07:35,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:35,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:35,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:35,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:35,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:35,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:35,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:35,397 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:35,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:35,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:35,409 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:13 [2021-06-12 20:07:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:35,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965997692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:35,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:35,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:35,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742940057] [2021-06-12 20:07:35,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:35,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:35,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:35,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:35,456 INFO L87 Difference]: Start difference. First operand 470 states and 1471 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:35,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:35,838 INFO L93 Difference]: Finished difference Result 778 states and 2368 transitions. [2021-06-12 20:07:35,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:07:35,839 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:35,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:35,840 INFO L225 Difference]: With dead ends: 778 [2021-06-12 20:07:35,840 INFO L226 Difference]: Without dead ends: 755 [2021-06-12 20:07:35,840 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 306.8ms TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:07:35,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-06-12 20:07:35,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 474. [2021-06-12 20:07:35,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.1353065539112053) internal successors, (1483), 473 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:35,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1483 transitions. [2021-06-12 20:07:35,845 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1483 transitions. Word has length 21 [2021-06-12 20:07:35,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:35,845 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1483 transitions. [2021-06-12 20:07:35,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:35,845 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1483 transitions. [2021-06-12 20:07:35,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:35,846 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:35,846 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:36,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5545,958 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:36,046 INFO L430 AbstractCegarLoop]: === Iteration 970 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:36,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:36,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1388859393, now seen corresponding path program 958 times [2021-06-12 20:07:36,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:36,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370189715] [2021-06-12 20:07:36,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:36,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:36,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370189715] [2021-06-12 20:07:36,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370189715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:36,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289011624] [2021-06-12 20:07:36,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 959 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 959 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:36,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:07:36,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:36,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:36,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:36,243 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_274], 1=[o_0]} [2021-06-12 20:07:36,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:36,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:36,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:36,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:36,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:36,262 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:36,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:36,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:36,275 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:36 [2021-06-12 20:07:36,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:36,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:36,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:36,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:36,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:36,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:36,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:36,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:36,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:36,366 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:10 [2021-06-12 20:07:36,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:36,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289011624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:36,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:36,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:36,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154196131] [2021-06-12 20:07:36,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:36,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:36,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:36,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:36,410 INFO L87 Difference]: Start difference. First operand 474 states and 1483 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:36,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:36,753 INFO L93 Difference]: Finished difference Result 672 states and 2059 transitions. [2021-06-12 20:07:36,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:07:36,753 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:36,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:36,754 INFO L225 Difference]: With dead ends: 672 [2021-06-12 20:07:36,754 INFO L226 Difference]: Without dead ends: 653 [2021-06-12 20:07:36,754 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 337.1ms TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:07:36,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-06-12 20:07:36,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 470. [2021-06-12 20:07:36,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.1279317697228146) internal successors, (1467), 469 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:36,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1467 transitions. [2021-06-12 20:07:36,759 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1467 transitions. Word has length 21 [2021-06-12 20:07:36,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:36,759 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1467 transitions. [2021-06-12 20:07:36,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:36,759 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1467 transitions. [2021-06-12 20:07:36,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:36,760 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:36,760 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:36,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 959 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5553 [2021-06-12 20:07:36,960 INFO L430 AbstractCegarLoop]: === Iteration 971 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:36,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:36,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1177146015, now seen corresponding path program 959 times [2021-06-12 20:07:36,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:36,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048994564] [2021-06-12 20:07:36,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:37,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:37,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048994564] [2021-06-12 20:07:37,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048994564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:37,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69182339] [2021-06-12 20:07:37,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 960 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 960 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:37,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:07:37,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:37,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:37,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:37,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:37,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:37,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:37,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:37,130 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:37,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:37,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:37,142 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-12 20:07:37,202 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_4]} [2021-06-12 20:07:37,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:37,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:37,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:37,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:37,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:37,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:37,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:07:37,227 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:37,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:37,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:37,239 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:15 [2021-06-12 20:07:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:37,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69182339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:37,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:37,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:07:37,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114644527] [2021-06-12 20:07:37,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:07:37,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:37,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:07:37,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:37,266 INFO L87 Difference]: Start difference. First operand 470 states and 1467 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:37,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:37,414 INFO L93 Difference]: Finished difference Result 596 states and 1840 transitions. [2021-06-12 20:07:37,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:37,414 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:37,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:37,415 INFO L225 Difference]: With dead ends: 596 [2021-06-12 20:07:37,415 INFO L226 Difference]: Without dead ends: 567 [2021-06-12 20:07:37,415 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 163.5ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:37,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-12 20:07:37,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 470. [2021-06-12 20:07:37,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.1279317697228146) internal successors, (1467), 469 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:37,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1467 transitions. [2021-06-12 20:07:37,420 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1467 transitions. Word has length 21 [2021-06-12 20:07:37,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:37,420 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1467 transitions. [2021-06-12 20:07:37,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:37,420 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1467 transitions. [2021-06-12 20:07:37,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:37,420 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:37,420 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:37,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5558,960 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:37,621 INFO L430 AbstractCegarLoop]: === Iteration 972 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:37,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:37,621 INFO L82 PathProgramCache]: Analyzing trace with hash 82447097, now seen corresponding path program 960 times [2021-06-12 20:07:37,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:37,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587164220] [2021-06-12 20:07:37,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:37,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:37,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:37,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:37,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587164220] [2021-06-12 20:07:37,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587164220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:37,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178459225] [2021-06-12 20:07:37,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 961 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 961 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:37,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:07:37,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:37,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:37,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:37,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:37,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:37,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:37,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:37,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:07:37,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 20:07:37,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:37,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:37,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:37,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:37,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:07:37,901 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:37,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:37,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:37,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:37,922 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:37,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:37,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:37,940 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:13 [2021-06-12 20:07:37,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:37,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178459225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:37,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:37,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:07:37,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072675567] [2021-06-12 20:07:37,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:37,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:37,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:37,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:37,963 INFO L87 Difference]: Start difference. First operand 470 states and 1467 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:38,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:38,216 INFO L93 Difference]: Finished difference Result 559 states and 1723 transitions. [2021-06-12 20:07:38,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:38,217 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:38,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:38,218 INFO L225 Difference]: With dead ends: 559 [2021-06-12 20:07:38,218 INFO L226 Difference]: Without dead ends: 532 [2021-06-12 20:07:38,218 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:38,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-06-12 20:07:38,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 467. [2021-06-12 20:07:38,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.130901287553648) internal successors, (1459), 466 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:38,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1459 transitions. [2021-06-12 20:07:38,224 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1459 transitions. Word has length 21 [2021-06-12 20:07:38,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:38,225 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1459 transitions. [2021-06-12 20:07:38,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:38,225 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1459 transitions. [2021-06-12 20:07:38,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:38,225 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:38,225 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:38,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5567,961 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:38,437 INFO L430 AbstractCegarLoop]: === Iteration 973 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:38,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:38,437 INFO L82 PathProgramCache]: Analyzing trace with hash -541838667, now seen corresponding path program 961 times [2021-06-12 20:07:38,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:38,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602847257] [2021-06-12 20:07:38,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:38,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:38,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602847257] [2021-06-12 20:07:38,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602847257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:38,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700925063] [2021-06-12 20:07:38,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 962 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 962 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:38,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:38,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:38,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:38,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:38,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:38,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:38,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:38,612 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:38,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:38,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:38,629 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:42 [2021-06-12 20:07:38,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:38,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:38,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:38,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:38,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:38,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:38,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:38,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:07:38,698 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:38,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:38,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:38,713 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:70, output treesize:21 [2021-06-12 20:07:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:38,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700925063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:38,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:38,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:07:38,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393709963] [2021-06-12 20:07:38,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:38,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:38,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:38,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:38,754 INFO L87 Difference]: Start difference. First operand 467 states and 1459 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:38,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:38,910 INFO L93 Difference]: Finished difference Result 599 states and 1848 transitions. [2021-06-12 20:07:38,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:38,910 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:38,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:38,911 INFO L225 Difference]: With dead ends: 599 [2021-06-12 20:07:38,911 INFO L226 Difference]: Without dead ends: 570 [2021-06-12 20:07:38,911 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 157.5ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:38,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-12 20:07:38,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 467. [2021-06-12 20:07:38,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.130901287553648) internal successors, (1459), 466 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:38,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1459 transitions. [2021-06-12 20:07:38,916 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1459 transitions. Word has length 21 [2021-06-12 20:07:38,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:38,916 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1459 transitions. [2021-06-12 20:07:38,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:38,916 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1459 transitions. [2021-06-12 20:07:38,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:38,917 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:38,917 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:39,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 962 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5578 [2021-06-12 20:07:39,117 INFO L430 AbstractCegarLoop]: === Iteration 974 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:39,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:39,117 INFO L82 PathProgramCache]: Analyzing trace with hash -244572257, now seen corresponding path program 962 times [2021-06-12 20:07:39,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:39,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295062902] [2021-06-12 20:07:39,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:39,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:39,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:39,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295062902] [2021-06-12 20:07:39,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295062902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:39,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410194353] [2021-06-12 20:07:39,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 963 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 963 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:39,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:07:39,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:39,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:39,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:39,317 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[v_prenex_275]} [2021-06-12 20:07:39,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:39,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:39,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:39,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:39,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:39,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:39,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:39,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:39,351 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:36 [2021-06-12 20:07:39,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:39,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:39,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:39,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:39,398 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:39,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:39,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:39,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:39,417 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:39,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:39,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:39,433 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:64, output treesize:19 [2021-06-12 20:07:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:39,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410194353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:39,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:39,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:07:39,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405606129] [2021-06-12 20:07:39,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:07:39,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:39,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:07:39,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:07:39,457 INFO L87 Difference]: Start difference. First operand 467 states and 1459 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:39,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:39,611 INFO L93 Difference]: Finished difference Result 658 states and 2010 transitions. [2021-06-12 20:07:39,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:39,612 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:39,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:39,612 INFO L225 Difference]: With dead ends: 658 [2021-06-12 20:07:39,613 INFO L226 Difference]: Without dead ends: 635 [2021-06-12 20:07:39,613 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 173.0ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:39,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-06-12 20:07:39,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 471. [2021-06-12 20:07:39,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.148936170212766) internal successors, (1480), 470 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:39,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1480 transitions. [2021-06-12 20:07:39,618 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1480 transitions. Word has length 21 [2021-06-12 20:07:39,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:39,618 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1480 transitions. [2021-06-12 20:07:39,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:39,618 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1480 transitions. [2021-06-12 20:07:39,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:39,618 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:39,618 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:39,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 963 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5584 [2021-06-12 20:07:39,819 INFO L430 AbstractCegarLoop]: === Iteration 975 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:39,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:39,819 INFO L82 PathProgramCache]: Analyzing trace with hash -528834941, now seen corresponding path program 963 times [2021-06-12 20:07:39,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:39,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196978973] [2021-06-12 20:07:39,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:39,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:39,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:39,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196978973] [2021-06-12 20:07:39,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196978973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:39,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181423161] [2021-06-12 20:07:39,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 964 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 964 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:39,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:07:39,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:39,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:39,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:39,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:39,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:39,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:40,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:40,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:07:40,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-06-12 20:07:40,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:07:40,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:40,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:40,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:40,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:40,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:40,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:40,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:40,077 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:40,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:40,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:40,094 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:19 [2021-06-12 20:07:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:40,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181423161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:40,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:40,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:40,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063583806] [2021-06-12 20:07:40,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:40,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:40,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:40,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:40,170 INFO L87 Difference]: Start difference. First operand 471 states and 1480 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:40,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:40,452 INFO L93 Difference]: Finished difference Result 648 states and 1995 transitions. [2021-06-12 20:07:40,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:07:40,452 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:40,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:40,453 INFO L225 Difference]: With dead ends: 648 [2021-06-12 20:07:40,453 INFO L226 Difference]: Without dead ends: 621 [2021-06-12 20:07:40,453 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 267.1ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:07:40,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-12 20:07:40,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 469. [2021-06-12 20:07:40,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.138888888888889) internal successors, (1469), 468 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:40,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1469 transitions. [2021-06-12 20:07:40,458 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1469 transitions. Word has length 21 [2021-06-12 20:07:40,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:40,458 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1469 transitions. [2021-06-12 20:07:40,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:40,458 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1469 transitions. [2021-06-12 20:07:40,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:40,459 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:40,459 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:40,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 964 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5592 [2021-06-12 20:07:40,659 INFO L430 AbstractCegarLoop]: === Iteration 976 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:40,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:40,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1952945265, now seen corresponding path program 964 times [2021-06-12 20:07:40,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:40,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68544636] [2021-06-12 20:07:40,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:40,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:40,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:40,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:40,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68544636] [2021-06-12 20:07:40,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68544636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:40,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982219107] [2021-06-12 20:07:40,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 965 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 965 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:40,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:07:40,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:40,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:40,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:40,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:40,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:40,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:40,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:40,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:40,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:19 [2021-06-12 20:07:40,906 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_4]} [2021-06-12 20:07:40,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:40,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:40,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:40,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:40,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:40,915 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:40,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:40,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:40,920 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:7 [2021-06-12 20:07:40,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:40,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982219107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:40,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:40,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:40,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000770562] [2021-06-12 20:07:40,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:40,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:40,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:40,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:40,946 INFO L87 Difference]: Start difference. First operand 469 states and 1469 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:41,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:41,289 INFO L93 Difference]: Finished difference Result 679 states and 2079 transitions. [2021-06-12 20:07:41,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:07:41,289 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:41,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:41,290 INFO L225 Difference]: With dead ends: 679 [2021-06-12 20:07:41,290 INFO L226 Difference]: Without dead ends: 660 [2021-06-12 20:07:41,290 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 313.9ms TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:07:41,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-06-12 20:07:41,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 473. [2021-06-12 20:07:41,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.13771186440678) internal successors, (1481), 472 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:41,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1481 transitions. [2021-06-12 20:07:41,295 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1481 transitions. Word has length 21 [2021-06-12 20:07:41,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:41,295 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1481 transitions. [2021-06-12 20:07:41,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:41,296 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1481 transitions. [2021-06-12 20:07:41,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:41,296 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:41,296 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:41,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5604,965 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:41,497 INFO L430 AbstractCegarLoop]: === Iteration 977 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:41,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:41,497 INFO L82 PathProgramCache]: Analyzing trace with hash 308385551, now seen corresponding path program 965 times [2021-06-12 20:07:41,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:41,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978547693] [2021-06-12 20:07:41,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:41,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:41,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:41,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978547693] [2021-06-12 20:07:41,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978547693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:41,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054920849] [2021-06-12 20:07:41,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 966 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 966 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:41,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:07:41,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:41,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:41,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:41,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:41,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:41,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:41,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:41,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:07:41,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-06-12 20:07:41,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:41,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:41,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:41,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:41,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:41,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:41,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:41,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:41,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:41,775 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:10 [2021-06-12 20:07:41,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:41,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054920849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:41,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:41,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:41,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501960604] [2021-06-12 20:07:41,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:41,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:41,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:41,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:41,818 INFO L87 Difference]: Start difference. First operand 473 states and 1481 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:42,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:42,195 INFO L93 Difference]: Finished difference Result 665 states and 2042 transitions. [2021-06-12 20:07:42,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:07:42,196 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:42,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:42,197 INFO L225 Difference]: With dead ends: 665 [2021-06-12 20:07:42,197 INFO L226 Difference]: Without dead ends: 646 [2021-06-12 20:07:42,197 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 357.7ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:07:42,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-06-12 20:07:42,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 460. [2021-06-12 20:07:42,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.122004357298475) internal successors, (1433), 459 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:42,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1433 transitions. [2021-06-12 20:07:42,203 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1433 transitions. Word has length 21 [2021-06-12 20:07:42,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:42,203 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1433 transitions. [2021-06-12 20:07:42,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:42,203 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1433 transitions. [2021-06-12 20:07:42,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:42,203 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:42,203 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:42,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5606,966 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:42,404 INFO L430 AbstractCegarLoop]: === Iteration 978 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:42,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:42,404 INFO L82 PathProgramCache]: Analyzing trace with hash 926647719, now seen corresponding path program 966 times [2021-06-12 20:07:42,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:42,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396773911] [2021-06-12 20:07:42,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:42,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:42,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396773911] [2021-06-12 20:07:42,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396773911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:42,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374448320] [2021-06-12 20:07:42,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 967 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 967 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:42,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:07:42,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:42,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:42,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:42,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:42,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:42,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:42,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:07:42,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-06-12 20:07:42,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:42,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:42,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:42,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:42,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:42,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:42,636 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:42,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:42,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:42,642 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:10 [2021-06-12 20:07:42,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:42,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374448320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:42,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:42,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:07:42,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754973591] [2021-06-12 20:07:42,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:42,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:42,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:42,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:42,654 INFO L87 Difference]: Start difference. First operand 460 states and 1433 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:42,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:42,754 INFO L93 Difference]: Finished difference Result 534 states and 1646 transitions. [2021-06-12 20:07:42,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:42,755 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:42,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:42,755 INFO L225 Difference]: With dead ends: 534 [2021-06-12 20:07:42,755 INFO L226 Difference]: Without dead ends: 515 [2021-06-12 20:07:42,756 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 150.8ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:42,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-06-12 20:07:42,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 456. [2021-06-12 20:07:42,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.123076923076923) internal successors, (1421), 455 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:42,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1421 transitions. [2021-06-12 20:07:42,760 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1421 transitions. Word has length 21 [2021-06-12 20:07:42,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:42,760 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1421 transitions. [2021-06-12 20:07:42,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:42,760 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1421 transitions. [2021-06-12 20:07:42,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:42,761 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:42,761 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:42,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 967 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5609 [2021-06-12 20:07:42,961 INFO L430 AbstractCegarLoop]: === Iteration 979 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:42,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:42,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1131563257, now seen corresponding path program 967 times [2021-06-12 20:07:42,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:42,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911872573] [2021-06-12 20:07:42,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:42,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:43,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:43,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:43,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911872573] [2021-06-12 20:07:43,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911872573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:43,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630276782] [2021-06-12 20:07:43,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 968 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 968 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:43,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:43,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:43,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:43,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:43,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:43,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:07:43,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:25 [2021-06-12 20:07:43,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:07:43,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:43,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:43,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:07:43,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:43,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:43,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:43,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:07:43,194 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:43,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:43,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:43,206 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:15 [2021-06-12 20:07:43,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:43,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630276782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:43,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:43,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:07:43,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399461980] [2021-06-12 20:07:43,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:43,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:43,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:43,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:43,224 INFO L87 Difference]: Start difference. First operand 456 states and 1421 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:43,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:43,382 INFO L93 Difference]: Finished difference Result 555 states and 1708 transitions. [2021-06-12 20:07:43,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:43,382 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:43,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:43,383 INFO L225 Difference]: With dead ends: 555 [2021-06-12 20:07:43,383 INFO L226 Difference]: Without dead ends: 519 [2021-06-12 20:07:43,383 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 135.6ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:43,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-12 20:07:43,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 456. [2021-06-12 20:07:43,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.123076923076923) internal successors, (1421), 455 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:43,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1421 transitions. [2021-06-12 20:07:43,388 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1421 transitions. Word has length 21 [2021-06-12 20:07:43,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:43,388 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1421 transitions. [2021-06-12 20:07:43,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:43,388 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1421 transitions. [2021-06-12 20:07:43,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:43,388 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:43,388 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:43,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5611,968 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:43,589 INFO L430 AbstractCegarLoop]: === Iteration 980 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:43,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:43,589 INFO L82 PathProgramCache]: Analyzing trace with hash 2068705121, now seen corresponding path program 968 times [2021-06-12 20:07:43,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:43,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655493849] [2021-06-12 20:07:43,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:43,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:43,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:43,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655493849] [2021-06-12 20:07:43,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655493849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:43,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835846504] [2021-06-12 20:07:43,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 969 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 969 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:43,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:07:43,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:43,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:43,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:43,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:43,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:43,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:43,774 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:43,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:43,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:43,787 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-12 20:07:43,816 INFO L446 ElimStorePlain]: Different costs {0=[o_0, o_4], 1=[v_prenex_276, v_prenex_277]} [2021-06-12 20:07:43,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:43,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:43,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:43,829 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:07:43,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:43,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:43,832 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:43,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:43,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:43,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:43,842 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:43,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:43,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:43,851 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:43, output treesize:13 [2021-06-12 20:07:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:43,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835846504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:43,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:43,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:07:43,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823659728] [2021-06-12 20:07:43,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:07:43,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:43,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:07:43,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:43,880 INFO L87 Difference]: Start difference. First operand 456 states and 1421 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:44,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:44,050 INFO L93 Difference]: Finished difference Result 596 states and 1827 transitions. [2021-06-12 20:07:44,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:07:44,050 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:44,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:44,051 INFO L225 Difference]: With dead ends: 596 [2021-06-12 20:07:44,051 INFO L226 Difference]: Without dead ends: 569 [2021-06-12 20:07:44,051 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 173.2ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:44,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-06-12 20:07:44,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 471. [2021-06-12 20:07:44,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.1212765957446806) internal successors, (1467), 470 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:44,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1467 transitions. [2021-06-12 20:07:44,056 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1467 transitions. Word has length 21 [2021-06-12 20:07:44,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:44,056 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1467 transitions. [2021-06-12 20:07:44,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:44,056 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1467 transitions. [2021-06-12 20:07:44,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:44,057 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:44,057 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:44,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 969 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5618 [2021-06-12 20:07:44,257 INFO L430 AbstractCegarLoop]: === Iteration 981 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:44,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:44,257 INFO L82 PathProgramCache]: Analyzing trace with hash -345509237, now seen corresponding path program 969 times [2021-06-12 20:07:44,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:44,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013053236] [2021-06-12 20:07:44,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:44,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:44,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013053236] [2021-06-12 20:07:44,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013053236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:44,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277464182] [2021-06-12 20:07:44,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 970 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 970 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:44,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:07:44,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:44,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:44,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:44,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:44,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:44,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:44,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:44,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:44,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:44,467 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-12 20:07:44,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:44,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:44,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:44,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:44,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:44,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:44,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:44,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:44,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:44,523 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:28, output treesize:7 [2021-06-12 20:07:44,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:44,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277464182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:44,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:44,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:07:44,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731940731] [2021-06-12 20:07:44,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:07:44,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:44,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:07:44,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:44,533 INFO L87 Difference]: Start difference. First operand 471 states and 1467 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:44,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:44,661 INFO L93 Difference]: Finished difference Result 546 states and 1674 transitions. [2021-06-12 20:07:44,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:44,661 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:44,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:44,662 INFO L225 Difference]: With dead ends: 546 [2021-06-12 20:07:44,662 INFO L226 Difference]: Without dead ends: 525 [2021-06-12 20:07:44,662 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 151.2ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:44,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-06-12 20:07:44,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 453. [2021-06-12 20:07:44,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 3.1261061946902653) internal successors, (1413), 452 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:44,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1413 transitions. [2021-06-12 20:07:44,666 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1413 transitions. Word has length 21 [2021-06-12 20:07:44,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:44,666 INFO L482 AbstractCegarLoop]: Abstraction has 453 states and 1413 transitions. [2021-06-12 20:07:44,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:44,667 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1413 transitions. [2021-06-12 20:07:44,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:44,667 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:44,667 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:44,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 970 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5630 [2021-06-12 20:07:44,868 INFO L430 AbstractCegarLoop]: === Iteration 982 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:44,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:44,868 INFO L82 PathProgramCache]: Analyzing trace with hash 306783805, now seen corresponding path program 970 times [2021-06-12 20:07:44,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:44,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145113193] [2021-06-12 20:07:44,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:44,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:44,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:44,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145113193] [2021-06-12 20:07:44,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145113193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:44,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477600447] [2021-06-12 20:07:44,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 971 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 971 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:44,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:07:44,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:44,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:44,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:45,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:45,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:45,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:45,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:07:45,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:30 [2021-06-12 20:07:45,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:07:45,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:45,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:45,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:07:45,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:45,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:45,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:45,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:07:45,086 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:45,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:45,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:45,101 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:21 [2021-06-12 20:07:45,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:45,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477600447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:45,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:45,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:07:45,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311156827] [2021-06-12 20:07:45,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:45,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:45,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:45,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:45,135 INFO L87 Difference]: Start difference. First operand 453 states and 1413 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:45,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:45,282 INFO L93 Difference]: Finished difference Result 570 states and 1748 transitions. [2021-06-12 20:07:45,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:45,283 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:45,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:45,283 INFO L225 Difference]: With dead ends: 570 [2021-06-12 20:07:45,283 INFO L226 Difference]: Without dead ends: 534 [2021-06-12 20:07:45,284 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:45,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-12 20:07:45,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 454. [2021-06-12 20:07:45,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 3.130242825607064) internal successors, (1418), 453 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:45,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1418 transitions. [2021-06-12 20:07:45,288 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1418 transitions. Word has length 21 [2021-06-12 20:07:45,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:45,288 INFO L482 AbstractCegarLoop]: Abstraction has 454 states and 1418 transitions. [2021-06-12 20:07:45,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:45,288 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1418 transitions. [2021-06-12 20:07:45,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:45,289 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:45,289 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:45,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 971 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5637 [2021-06-12 20:07:45,489 INFO L430 AbstractCegarLoop]: === Iteration 983 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:45,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:45,489 INFO L82 PathProgramCache]: Analyzing trace with hash 604050215, now seen corresponding path program 971 times [2021-06-12 20:07:45,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:45,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471538073] [2021-06-12 20:07:45,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:45,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:45,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:45,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471538073] [2021-06-12 20:07:45,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471538073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:45,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708522184] [2021-06-12 20:07:45,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 972 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 972 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:45,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:07:45,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:45,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:07:45,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:45,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:45,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:45,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:45,657 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:45,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:45,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:45,672 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:07:45,706 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_278, v_prenex_279], 1=[o_0, o_4]} [2021-06-12 20:07:45,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:45,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:45,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:45,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:45,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:45,751 INFO L518 ElimStorePlain]: Eliminatee v_prenex_279 vanished before elimination [2021-06-12 20:07:45,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:45,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:45,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:45,755 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:45,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:45,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:45,759 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:45,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:45,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:45,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:45,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:45,797 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:45,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:45,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:45,800 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:45,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:45,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:07:45,834 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:121, output treesize:57 [2021-06-12 20:07:45,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:45,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708522184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:45,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:45,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:45,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585955318] [2021-06-12 20:07:45,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:45,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:45,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:45,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:45,954 INFO L87 Difference]: Start difference. First operand 454 states and 1418 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:46,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:46,308 INFO L93 Difference]: Finished difference Result 655 states and 2000 transitions. [2021-06-12 20:07:46,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:07:46,308 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:46,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:46,309 INFO L225 Difference]: With dead ends: 655 [2021-06-12 20:07:46,309 INFO L226 Difference]: Without dead ends: 632 [2021-06-12 20:07:46,309 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 352.8ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:07:46,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-06-12 20:07:46,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 469. [2021-06-12 20:07:46,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.1474358974358974) internal successors, (1473), 468 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:46,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1473 transitions. [2021-06-12 20:07:46,314 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1473 transitions. Word has length 21 [2021-06-12 20:07:46,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:46,314 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1473 transitions. [2021-06-12 20:07:46,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:46,314 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1473 transitions. [2021-06-12 20:07:46,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:46,315 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:46,315 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:46,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5641,972 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:46,515 INFO L430 AbstractCegarLoop]: === Iteration 984 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:46,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:46,515 INFO L82 PathProgramCache]: Analyzing trace with hash 319787531, now seen corresponding path program 972 times [2021-06-12 20:07:46,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:46,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240027323] [2021-06-12 20:07:46,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:46,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:46,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240027323] [2021-06-12 20:07:46,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240027323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:46,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397768036] [2021-06-12 20:07:46,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 973 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 973 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:46,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:07:46,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:46,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:46,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:46,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:46,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:46,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:46,690 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:46,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:46,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:46,705 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:07:46,740 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_280, v_prenex_281], 1=[o_0, o_4]} [2021-06-12 20:07:46,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:46,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:46,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:46,756 INFO L518 ElimStorePlain]: Eliminatee v_prenex_281 vanished before elimination [2021-06-12 20:07:46,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:46,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:46,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:46,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:46,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:46,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:46,772 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:46,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:46,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:46,783 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:51, output treesize:19 [2021-06-12 20:07:46,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:46,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397768036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:46,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:46,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:46,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922441397] [2021-06-12 20:07:46,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:46,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:46,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:46,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:46,866 INFO L87 Difference]: Start difference. First operand 469 states and 1473 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:47,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:47,146 INFO L93 Difference]: Finished difference Result 717 states and 2186 transitions. [2021-06-12 20:07:47,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:07:47,146 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:47,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:47,147 INFO L225 Difference]: With dead ends: 717 [2021-06-12 20:07:47,147 INFO L226 Difference]: Without dead ends: 690 [2021-06-12 20:07:47,147 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 282.9ms TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:07:47,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-06-12 20:07:47,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 487. [2021-06-12 20:07:47,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.154320987654321) internal successors, (1533), 486 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:47,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1533 transitions. [2021-06-12 20:07:47,152 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1533 transitions. Word has length 21 [2021-06-12 20:07:47,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:47,152 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1533 transitions. [2021-06-12 20:07:47,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:47,152 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1533 transitions. [2021-06-12 20:07:47,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:47,153 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:47,153 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:47,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 973 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5651 [2021-06-12 20:07:47,353 INFO L430 AbstractCegarLoop]: === Iteration 985 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:47,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:47,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1640959435, now seen corresponding path program 973 times [2021-06-12 20:07:47,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:47,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484466324] [2021-06-12 20:07:47,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:47,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:47,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:47,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484466324] [2021-06-12 20:07:47,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484466324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:47,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741056858] [2021-06-12 20:07:47,457 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 974 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 974 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:47,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:47,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:47,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:47,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:47,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:47,533 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:47,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:47,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:47,549 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:07:47,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:47,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:47,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:47,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:47,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:47,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:47,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:47,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:47,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:47,610 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:10 [2021-06-12 20:07:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:47,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741056858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:47,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:47,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:47,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078994547] [2021-06-12 20:07:47,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:47,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:47,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:47,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:47,661 INFO L87 Difference]: Start difference. First operand 487 states and 1533 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:47,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:47,960 INFO L93 Difference]: Finished difference Result 671 states and 2064 transitions. [2021-06-12 20:07:47,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:07:47,960 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:47,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:47,961 INFO L225 Difference]: With dead ends: 671 [2021-06-12 20:07:47,961 INFO L226 Difference]: Without dead ends: 652 [2021-06-12 20:07:47,961 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 269.9ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:07:47,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-12 20:07:47,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 473. [2021-06-12 20:07:47,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.1440677966101696) internal successors, (1484), 472 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:47,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1484 transitions. [2021-06-12 20:07:47,966 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1484 transitions. Word has length 21 [2021-06-12 20:07:47,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:47,966 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1484 transitions. [2021-06-12 20:07:47,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:47,967 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1484 transitions. [2021-06-12 20:07:47,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:47,967 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:47,967 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:48,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 974 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5663 [2021-06-12 20:07:48,168 INFO L430 AbstractCegarLoop]: === Iteration 986 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:48,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:48,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1095586781, now seen corresponding path program 974 times [2021-06-12 20:07:48,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:48,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623913502] [2021-06-12 20:07:48,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:48,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:48,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:48,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:48,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623913502] [2021-06-12 20:07:48,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623913502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:48,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656390029] [2021-06-12 20:07:48,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 975 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 975 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:48,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:07:48,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:48,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:48,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:48,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:48,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:48,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:48,336 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:48,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:48,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:48,351 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:07:48,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:48,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:48,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:48,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:48,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:48,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:48,449 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:48,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:48,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:48,454 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:28, output treesize:7 [2021-06-12 20:07:48,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:48,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656390029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:48,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:48,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:07:48,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755931380] [2021-06-12 20:07:48,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:07:48,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:48,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:07:48,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:48,469 INFO L87 Difference]: Start difference. First operand 473 states and 1484 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:48,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:48,639 INFO L93 Difference]: Finished difference Result 577 states and 1763 transitions. [2021-06-12 20:07:48,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:48,639 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:48,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:48,640 INFO L225 Difference]: With dead ends: 577 [2021-06-12 20:07:48,640 INFO L226 Difference]: Without dead ends: 556 [2021-06-12 20:07:48,640 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 181.2ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:07:48,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-12 20:07:48,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 469. [2021-06-12 20:07:48,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.1452991452991452) internal successors, (1472), 468 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:48,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1472 transitions. [2021-06-12 20:07:48,645 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1472 transitions. Word has length 21 [2021-06-12 20:07:48,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:48,645 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1472 transitions. [2021-06-12 20:07:48,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:48,645 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1472 transitions. [2021-06-12 20:07:48,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:48,645 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:48,645 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:48,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5667,975 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:48,846 INFO L430 AbstractCegarLoop]: === Iteration 987 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:48,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:48,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1480395833, now seen corresponding path program 975 times [2021-06-12 20:07:48,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:48,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922113362] [2021-06-12 20:07:48,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:48,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:48,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:48,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922113362] [2021-06-12 20:07:48,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922113362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:48,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081015360] [2021-06-12 20:07:48,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 976 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 976 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:48,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:07:48,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:48,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:48,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:49,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:49,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:49,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:49,026 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:49,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:49,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:49,041 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:07:49,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:49,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:49,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:49,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:49,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:49,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:49,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:49,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:49,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:49,102 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:10 [2021-06-12 20:07:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:49,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081015360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:49,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:49,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:49,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172635829] [2021-06-12 20:07:49,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:49,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:49,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:49,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:49,146 INFO L87 Difference]: Start difference. First operand 469 states and 1472 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:49,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:49,397 INFO L93 Difference]: Finished difference Result 626 states and 1921 transitions. [2021-06-12 20:07:49,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:07:49,398 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:49,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:49,398 INFO L225 Difference]: With dead ends: 626 [2021-06-12 20:07:49,398 INFO L226 Difference]: Without dead ends: 605 [2021-06-12 20:07:49,398 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 209.2ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:07:49,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-06-12 20:07:49,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 452. [2021-06-12 20:07:49,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.1241685144124167) internal successors, (1409), 451 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:49,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1409 transitions. [2021-06-12 20:07:49,403 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1409 transitions. Word has length 21 [2021-06-12 20:07:49,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:49,403 INFO L482 AbstractCegarLoop]: Abstraction has 452 states and 1409 transitions. [2021-06-12 20:07:49,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:49,403 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1409 transitions. [2021-06-12 20:07:49,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:49,404 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:49,404 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:49,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 976 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5679 [2021-06-12 20:07:49,604 INFO L430 AbstractCegarLoop]: === Iteration 988 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:49,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:49,604 INFO L82 PathProgramCache]: Analyzing trace with hash 317055655, now seen corresponding path program 976 times [2021-06-12 20:07:49,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:49,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534709657] [2021-06-12 20:07:49,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:49,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:49,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:49,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534709657] [2021-06-12 20:07:49,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534709657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:49,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256861943] [2021-06-12 20:07:49,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 977 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 977 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:49,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:07:49,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:49,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:49,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:49,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:49,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:49,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:49,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:49,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:49,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:49,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:49,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:49,778 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-12 20:07:49,820 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_0]} [2021-06-12 20:07:49,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:49,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:49,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:49,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:49,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:07:49,831 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:49,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:49,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:49,837 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:35, output treesize:12 [2021-06-12 20:07:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:49,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256861943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:49,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:49,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:07:49,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945728756] [2021-06-12 20:07:49,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:49,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:49,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:49,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:49,850 INFO L87 Difference]: Start difference. First operand 452 states and 1409 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:49,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:49,969 INFO L93 Difference]: Finished difference Result 534 states and 1647 transitions. [2021-06-12 20:07:49,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:49,969 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:49,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:49,970 INFO L225 Difference]: With dead ends: 534 [2021-06-12 20:07:49,970 INFO L226 Difference]: Without dead ends: 512 [2021-06-12 20:07:49,970 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 139.1ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:49,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-12 20:07:49,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 458. [2021-06-12 20:07:49,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.1291028446389495) internal successors, (1430), 457 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:49,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1430 transitions. [2021-06-12 20:07:49,974 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1430 transitions. Word has length 21 [2021-06-12 20:07:49,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:49,975 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1430 transitions. [2021-06-12 20:07:49,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:49,975 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1430 transitions. [2021-06-12 20:07:49,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:49,975 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:49,975 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:50,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 977 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5683 [2021-06-12 20:07:50,176 INFO L430 AbstractCegarLoop]: === Iteration 989 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:50,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:50,176 INFO L82 PathProgramCache]: Analyzing trace with hash 942379773, now seen corresponding path program 977 times [2021-06-12 20:07:50,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:50,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981816038] [2021-06-12 20:07:50,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:50,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:50,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:50,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:50,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981816038] [2021-06-12 20:07:50,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981816038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:50,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007407964] [2021-06-12 20:07:50,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 978 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 978 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:50,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:07:50,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:50,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:07:50,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:50,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:50,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:50,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:50,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:50,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:50,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:50,348 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:50,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:50,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:50,370 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:77, output treesize:63 [2021-06-12 20:07:50,460 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_0]} [2021-06-12 20:07:50,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:07:50,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:50,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:50,466 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:50,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-12 20:07:50,469 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:50,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 20:07:50,472 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:50,513 INFO L628 ElimStorePlain]: treesize reduction 16, result has 81.8 percent of original size [2021-06-12 20:07:50,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:50,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:50,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:50,517 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:50,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:50,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-12 20:07:50,519 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:50,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:50,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:07:50,539 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:133, output treesize:26 [2021-06-12 20:07:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:50,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007407964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:50,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:50,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:50,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958665453] [2021-06-12 20:07:50,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:50,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:50,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:50,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:50,611 INFO L87 Difference]: Start difference. First operand 458 states and 1430 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:51,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:51,015 INFO L93 Difference]: Finished difference Result 635 states and 1962 transitions. [2021-06-12 20:07:51,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:07:51,015 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:51,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:51,016 INFO L225 Difference]: With dead ends: 635 [2021-06-12 20:07:51,016 INFO L226 Difference]: Without dead ends: 608 [2021-06-12 20:07:51,016 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 347.5ms TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:07:51,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-06-12 20:07:51,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 458. [2021-06-12 20:07:51,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.12472647702407) internal successors, (1428), 457 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:51,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1428 transitions. [2021-06-12 20:07:51,021 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1428 transitions. Word has length 21 [2021-06-12 20:07:51,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:51,021 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1428 transitions. [2021-06-12 20:07:51,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:51,021 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1428 transitions. [2021-06-12 20:07:51,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:51,022 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:51,022 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:51,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5686,978 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:51,222 INFO L430 AbstractCegarLoop]: === Iteration 990 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:51,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:51,222 INFO L82 PathProgramCache]: Analyzing trace with hash 658117089, now seen corresponding path program 978 times [2021-06-12 20:07:51,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:51,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281560897] [2021-06-12 20:07:51,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:51,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:51,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:51,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281560897] [2021-06-12 20:07:51,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281560897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:51,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490237717] [2021-06-12 20:07:51,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 979 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 979 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:51,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:07:51,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:51,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:51,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:51,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:51,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:51,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:51,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:51,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:51,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:51,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:51,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:51,416 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:47, output treesize:31 [2021-06-12 20:07:51,471 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_0]} [2021-06-12 20:07:51,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:51,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:51,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:51,476 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:51,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:51,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:51,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:51,491 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:51,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:51,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:51,503 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:13 [2021-06-12 20:07:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:51,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490237717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:51,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:51,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:51,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892149551] [2021-06-12 20:07:51,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:51,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:51,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:51,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:51,552 INFO L87 Difference]: Start difference. First operand 458 states and 1428 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:51,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:51,861 INFO L93 Difference]: Finished difference Result 729 states and 2226 transitions. [2021-06-12 20:07:51,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:07:51,861 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:51,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:51,862 INFO L225 Difference]: With dead ends: 729 [2021-06-12 20:07:51,862 INFO L226 Difference]: Without dead ends: 702 [2021-06-12 20:07:51,863 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 300.8ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:07:51,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-06-12 20:07:51,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 472. [2021-06-12 20:07:51,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.1231422505307855) internal successors, (1471), 471 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:51,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1471 transitions. [2021-06-12 20:07:51,868 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1471 transitions. Word has length 21 [2021-06-12 20:07:51,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:51,868 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1471 transitions. [2021-06-12 20:07:51,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:51,868 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1471 transitions. [2021-06-12 20:07:51,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:51,869 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:51,869 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:52,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5704,979 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:52,069 INFO L430 AbstractCegarLoop]: === Iteration 991 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:52,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:52,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1950458367, now seen corresponding path program 979 times [2021-06-12 20:07:52,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:52,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834294618] [2021-06-12 20:07:52,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:52,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:52,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:52,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834294618] [2021-06-12 20:07:52,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834294618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:52,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142055667] [2021-06-12 20:07:52,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 980 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 980 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:52,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:52,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:52,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:52,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:52,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:52,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:52,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:52,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:52,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:52,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:52,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:52,256 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:47, output treesize:31 [2021-06-12 20:07:52,320 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_0]} [2021-06-12 20:07:52,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:52,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:52,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:52,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:52,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:52,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:52,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:52,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:52,334 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:7 [2021-06-12 20:07:52,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:52,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142055667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:52,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:52,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:52,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181859870] [2021-06-12 20:07:52,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:52,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:52,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:52,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:52,364 INFO L87 Difference]: Start difference. First operand 472 states and 1471 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:52,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:52,644 INFO L93 Difference]: Finished difference Result 667 states and 2043 transitions. [2021-06-12 20:07:52,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:07:52,644 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:52,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:52,645 INFO L225 Difference]: With dead ends: 667 [2021-06-12 20:07:52,645 INFO L226 Difference]: Without dead ends: 646 [2021-06-12 20:07:52,645 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 297.6ms TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:07:52,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-06-12 20:07:52,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 473. [2021-06-12 20:07:52,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.1313559322033897) internal successors, (1478), 472 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:52,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1478 transitions. [2021-06-12 20:07:52,655 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1478 transitions. Word has length 21 [2021-06-12 20:07:52,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:52,655 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1478 transitions. [2021-06-12 20:07:52,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:52,655 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1478 transitions. [2021-06-12 20:07:52,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:52,656 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:52,656 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:52,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5715,980 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:52,856 INFO L430 AbstractCegarLoop]: === Iteration 992 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:52,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:52,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1927953995, now seen corresponding path program 980 times [2021-06-12 20:07:52,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:52,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345552729] [2021-06-12 20:07:52,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:52,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:52,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345552729] [2021-06-12 20:07:52,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345552729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:52,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827837089] [2021-06-12 20:07:52,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 981 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 981 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:52,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:07:52,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:52,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:52,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:53,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:53,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:53,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:53,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:53,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:53,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:53,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:53,052 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:46 [2021-06-12 20:07:53,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:53,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:53,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:53,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:53,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:53,109 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:53,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:53,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:53,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:07:53,128 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:53,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:53,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:53,144 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:24 [2021-06-12 20:07:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:53,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827837089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:53,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:53,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:07:53,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629464527] [2021-06-12 20:07:53,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:53,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:53,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:53,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:53,185 INFO L87 Difference]: Start difference. First operand 473 states and 1478 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:53,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:53,359 INFO L93 Difference]: Finished difference Result 596 states and 1842 transitions. [2021-06-12 20:07:53,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:53,360 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:53,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:53,360 INFO L225 Difference]: With dead ends: 596 [2021-06-12 20:07:53,360 INFO L226 Difference]: Without dead ends: 567 [2021-06-12 20:07:53,360 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 160.1ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:53,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-12 20:07:53,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 473. [2021-06-12 20:07:53,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.1313559322033897) internal successors, (1478), 472 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:53,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1478 transitions. [2021-06-12 20:07:53,365 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1478 transitions. Word has length 21 [2021-06-12 20:07:53,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:53,365 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1478 transitions. [2021-06-12 20:07:53,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:53,365 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1478 transitions. [2021-06-12 20:07:53,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:53,366 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:53,366 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:53,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5721,981 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:53,566 INFO L430 AbstractCegarLoop]: === Iteration 993 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:53,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:53,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1630687585, now seen corresponding path program 981 times [2021-06-12 20:07:53,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:53,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530392236] [2021-06-12 20:07:53,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:53,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:53,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530392236] [2021-06-12 20:07:53,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530392236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:53,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11002479] [2021-06-12 20:07:53,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 982 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 982 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:53,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:07:53,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:53,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:53,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:53,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:53,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:53,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:53,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:53,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:53,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-06-12 20:07:53,774 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_0]} [2021-06-12 20:07:53,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:07:53,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:53,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:53,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:53,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:53,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:53,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:53,797 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:53,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:53,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:53,812 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:61, output treesize:19 [2021-06-12 20:07:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:53,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11002479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:53,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:53,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:53,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226120391] [2021-06-12 20:07:53,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:53,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:53,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:53,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:53,884 INFO L87 Difference]: Start difference. First operand 473 states and 1478 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:54,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:54,258 INFO L93 Difference]: Finished difference Result 648 states and 1993 transitions. [2021-06-12 20:07:54,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:07:54,259 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:54,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:54,260 INFO L225 Difference]: With dead ends: 648 [2021-06-12 20:07:54,260 INFO L226 Difference]: Without dead ends: 625 [2021-06-12 20:07:54,260 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 338.7ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:07:54,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-06-12 20:07:54,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 472. [2021-06-12 20:07:54,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.140127388535032) internal successors, (1479), 471 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:54,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1479 transitions. [2021-06-12 20:07:54,265 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1479 transitions. Word has length 21 [2021-06-12 20:07:54,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:54,265 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1479 transitions. [2021-06-12 20:07:54,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:54,265 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1479 transitions. [2021-06-12 20:07:54,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:54,265 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:54,265 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:54,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5728,982 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:54,466 INFO L430 AbstractCegarLoop]: === Iteration 994 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:54,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:54,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1914950269, now seen corresponding path program 982 times [2021-06-12 20:07:54,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:54,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334297301] [2021-06-12 20:07:54,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:54,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:54,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334297301] [2021-06-12 20:07:54,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334297301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:54,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136182609] [2021-06-12 20:07:54,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 983 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 983 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:54,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:07:54,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:54,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:54,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:54,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:54,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:54,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:54,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:54,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:54,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:54,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:54,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:54,663 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:47, output treesize:31 [2021-06-12 20:07:54,692 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_0]} [2021-06-12 20:07:54,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:54,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:54,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:54,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:54,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:54,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:54,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:54,716 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:54,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:54,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:54,731 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:59, output treesize:19 [2021-06-12 20:07:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:54,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136182609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:54,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:54,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:54,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523955711] [2021-06-12 20:07:54,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:54,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:54,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:54,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:54,807 INFO L87 Difference]: Start difference. First operand 472 states and 1479 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:55,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:55,171 INFO L93 Difference]: Finished difference Result 753 states and 2288 transitions. [2021-06-12 20:07:55,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:07:55,171 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:55,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:55,172 INFO L225 Difference]: With dead ends: 753 [2021-06-12 20:07:55,172 INFO L226 Difference]: Without dead ends: 726 [2021-06-12 20:07:55,172 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 326.3ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:07:55,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2021-06-12 20:07:55,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 475. [2021-06-12 20:07:55,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.149789029535865) internal successors, (1493), 474 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:55,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1493 transitions. [2021-06-12 20:07:55,182 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1493 transitions. Word has length 21 [2021-06-12 20:07:55,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:55,182 INFO L482 AbstractCegarLoop]: Abstraction has 475 states and 1493 transitions. [2021-06-12 20:07:55,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:55,182 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1493 transitions. [2021-06-12 20:07:55,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:55,183 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:55,183 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:55,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 983 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5735 [2021-06-12 20:07:55,383 INFO L430 AbstractCegarLoop]: === Iteration 995 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:55,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:55,383 INFO L82 PathProgramCache]: Analyzing trace with hash 160739521, now seen corresponding path program 983 times [2021-06-12 20:07:55,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:55,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901962974] [2021-06-12 20:07:55,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:55,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:55,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901962974] [2021-06-12 20:07:55,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901962974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:55,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266905028] [2021-06-12 20:07:55,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 984 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 984 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:55,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:07:55,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:55,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:07:55,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:55,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:55,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:55,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:55,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:55,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:55,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:55,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:55,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:55,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:55,570 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:55,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:55,582 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:55,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:55,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:07:55,613 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:113, output treesize:81 [2021-06-12 20:07:55,694 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_0]} [2021-06-12 20:07:55,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:55,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:55,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:55,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:55,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:55,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:55,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:55,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:55,726 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:55,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:55,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:55,728 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:55,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:55,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:55,750 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:31 [2021-06-12 20:07:55,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:55,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266905028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:55,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:55,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:55,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165027688] [2021-06-12 20:07:55,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:55,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:55,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:55,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:55,827 INFO L87 Difference]: Start difference. First operand 475 states and 1493 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:56,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:56,196 INFO L93 Difference]: Finished difference Result 703 states and 2170 transitions. [2021-06-12 20:07:56,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:07:56,196 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:56,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:56,197 INFO L225 Difference]: With dead ends: 703 [2021-06-12 20:07:56,197 INFO L226 Difference]: Without dead ends: 682 [2021-06-12 20:07:56,197 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 371.6ms TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:07:56,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-06-12 20:07:56,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 471. [2021-06-12 20:07:56,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.1404255319148935) internal successors, (1476), 470 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:56,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1476 transitions. [2021-06-12 20:07:56,203 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1476 transitions. Word has length 21 [2021-06-12 20:07:56,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:56,203 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1476 transitions. [2021-06-12 20:07:56,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:56,203 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1476 transitions. [2021-06-12 20:07:56,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:56,203 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:56,203 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:56,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5746,984 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:56,404 INFO L430 AbstractCegarLoop]: === Iteration 996 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:56,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:56,404 INFO L82 PathProgramCache]: Analyzing trace with hash -230709051, now seen corresponding path program 984 times [2021-06-12 20:07:56,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:56,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480350588] [2021-06-12 20:07:56,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:56,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:56,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:56,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480350588] [2021-06-12 20:07:56,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480350588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:56,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660730066] [2021-06-12 20:07:56,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 985 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 985 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:56,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:07:56,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:56,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:56,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:56,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:56,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:56,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:56,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:07:56,571 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:30 [2021-06-12 20:07:56,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:07:56,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:56,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:56,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:07:56,607 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:56,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:56,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:56,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-12 20:07:56,625 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:56,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:56,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:56,640 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:21 [2021-06-12 20:07:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:56,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660730066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:56,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:56,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:07:56,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767755615] [2021-06-12 20:07:56,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:56,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:56,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:56,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:56,674 INFO L87 Difference]: Start difference. First operand 471 states and 1476 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:56,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:56,824 INFO L93 Difference]: Finished difference Result 570 states and 1763 transitions. [2021-06-12 20:07:56,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:56,825 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:56,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:56,825 INFO L225 Difference]: With dead ends: 570 [2021-06-12 20:07:56,825 INFO L226 Difference]: Without dead ends: 534 [2021-06-12 20:07:56,825 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:56,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-12 20:07:56,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 472. [2021-06-12 20:07:56,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.1443736730360934) internal successors, (1481), 471 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:56,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1481 transitions. [2021-06-12 20:07:56,830 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1481 transitions. Word has length 21 [2021-06-12 20:07:56,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:56,830 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1481 transitions. [2021-06-12 20:07:56,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:56,830 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1481 transitions. [2021-06-12 20:07:56,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:56,831 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:56,831 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:57,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 985 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5754 [2021-06-12 20:07:57,031 INFO L430 AbstractCegarLoop]: === Iteration 997 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:57,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:57,032 INFO L82 PathProgramCache]: Analyzing trace with hash 66557359, now seen corresponding path program 985 times [2021-06-12 20:07:57,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:57,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702758285] [2021-06-12 20:07:57,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:57,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:57,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:57,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702758285] [2021-06-12 20:07:57,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702758285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:57,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117285084] [2021-06-12 20:07:57,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 986 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 986 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:57,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:57,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:57,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:57,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:57,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:57,213 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:57,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:57,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:57,229 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:07:57,262 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_282, v_prenex_283], 1=[o_0, o_4]} [2021-06-12 20:07:57,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:57,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:57,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:57,278 INFO L518 ElimStorePlain]: Eliminatee v_prenex_283 vanished before elimination [2021-06-12 20:07:57,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:57,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:57,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:57,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:57,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:57,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:57,294 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:57,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:57,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:57,305 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:51, output treesize:19 [2021-06-12 20:07:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:57,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117285084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:57,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:57,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:57,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214422536] [2021-06-12 20:07:57,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:57,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:57,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:57,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:57,376 INFO L87 Difference]: Start difference. First operand 472 states and 1481 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:57,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:57,750 INFO L93 Difference]: Finished difference Result 683 states and 2098 transitions. [2021-06-12 20:07:57,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:07:57,750 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:57,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:57,751 INFO L225 Difference]: With dead ends: 683 [2021-06-12 20:07:57,751 INFO L226 Difference]: Without dead ends: 660 [2021-06-12 20:07:57,751 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 316.2ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:07:57,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-06-12 20:07:57,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 487. [2021-06-12 20:07:57,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.1604938271604937) internal successors, (1536), 486 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:57,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1536 transitions. [2021-06-12 20:07:57,756 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1536 transitions. Word has length 21 [2021-06-12 20:07:57,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:57,756 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1536 transitions. [2021-06-12 20:07:57,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:57,756 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1536 transitions. [2021-06-12 20:07:57,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:57,757 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:57,757 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:57,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5758,986 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:57,957 INFO L430 AbstractCegarLoop]: === Iteration 998 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:57,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:57,958 INFO L82 PathProgramCache]: Analyzing trace with hash -217705325, now seen corresponding path program 986 times [2021-06-12 20:07:57,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:57,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705441246] [2021-06-12 20:07:57,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:58,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:58,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705441246] [2021-06-12 20:07:58,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705441246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:58,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763145382] [2021-06-12 20:07:58,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 987 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 987 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:58,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:07:58,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:58,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:58,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:58,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:58,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:58,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:58,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:58,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:58,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:58,154 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:07:58,187 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_284, v_prenex_285], 1=[o_0, o_4]} [2021-06-12 20:07:58,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:58,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:58,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:58,202 INFO L518 ElimStorePlain]: Eliminatee v_prenex_285 vanished before elimination [2021-06-12 20:07:58,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:58,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:58,205 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:58,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:58,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:58,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:58,218 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:58,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:58,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:07:58,229 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:51, output treesize:19 [2021-06-12 20:07:58,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:58,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763145382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:58,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:58,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:07:58,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509379350] [2021-06-12 20:07:58,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:07:58,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:58,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:07:58,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:58,304 INFO L87 Difference]: Start difference. First operand 487 states and 1536 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:58,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:58,588 INFO L93 Difference]: Finished difference Result 692 states and 2134 transitions. [2021-06-12 20:07:58,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:07:58,588 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:58,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:58,589 INFO L225 Difference]: With dead ends: 692 [2021-06-12 20:07:58,589 INFO L226 Difference]: Without dead ends: 665 [2021-06-12 20:07:58,589 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 265.6ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:07:58,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-06-12 20:07:58,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 493. [2021-06-12 20:07:58,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.158536585365854) internal successors, (1554), 492 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:58,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1554 transitions. [2021-06-12 20:07:58,594 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1554 transitions. Word has length 21 [2021-06-12 20:07:58,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:58,594 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1554 transitions. [2021-06-12 20:07:58,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:58,594 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1554 transitions. [2021-06-12 20:07:58,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:58,595 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:58,595 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:58,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5767,987 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:58,795 INFO L430 AbstractCegarLoop]: === Iteration 999 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:58,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:58,796 INFO L82 PathProgramCache]: Analyzing trace with hash 2116515005, now seen corresponding path program 987 times [2021-06-12 20:07:58,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:58,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881685287] [2021-06-12 20:07:58,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:58,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:58,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881685287] [2021-06-12 20:07:58,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881685287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:58,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236350313] [2021-06-12 20:07:58,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 988 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 988 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:58,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:07:58,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:58,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:58,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:58,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:58,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:58,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:58,961 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:58,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:58,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:58,977 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:07:59,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:59,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:59,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:59,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:59,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:59,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:59,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:59,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:59,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:59,039 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:10 [2021-06-12 20:07:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:59,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236350313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:59,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:59,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:07:59,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947333703] [2021-06-12 20:07:59,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:59,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:59,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:59,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:59,054 INFO L87 Difference]: Start difference. First operand 493 states and 1554 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:59,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:59,214 INFO L93 Difference]: Finished difference Result 576 states and 1781 transitions. [2021-06-12 20:07:59,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:59,214 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:59,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:59,215 INFO L225 Difference]: With dead ends: 576 [2021-06-12 20:07:59,215 INFO L226 Difference]: Without dead ends: 557 [2021-06-12 20:07:59,215 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 137.5ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:59,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-06-12 20:07:59,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 477. [2021-06-12 20:07:59,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.1512605042016806) internal successors, (1500), 476 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:59,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1500 transitions. [2021-06-12 20:07:59,220 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1500 transitions. Word has length 21 [2021-06-12 20:07:59,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:59,220 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1500 transitions. [2021-06-12 20:07:59,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:59,220 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1500 transitions. [2021-06-12 20:07:59,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:59,221 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:59,221 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:59,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5779,988 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:59,421 INFO L430 AbstractCegarLoop]: === Iteration 1000 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:59,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:59,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1633079637, now seen corresponding path program 988 times [2021-06-12 20:07:59,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:59,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788866940] [2021-06-12 20:07:59,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:59,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:59,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:59,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788866940] [2021-06-12 20:07:59,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788866940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:59,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969557710] [2021-06-12 20:07:59,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 989 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 989 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:59,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:07:59,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:59,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:59,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:59,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:07:59,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:59,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:59,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:59,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:59,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:07:59,614 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:07:59,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:59,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:59,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:59,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:59,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:59,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:07:59,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:59,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:59,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:07:59,712 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:28, output treesize:7 [2021-06-12 20:07:59,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:07:59,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969557710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:59,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:59,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:07:59,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647751184] [2021-06-12 20:07:59,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:07:59,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:59,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:07:59,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:59,722 INFO L87 Difference]: Start difference. First operand 477 states and 1500 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:59,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:59,904 INFO L93 Difference]: Finished difference Result 585 states and 1800 transitions. [2021-06-12 20:07:59,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:07:59,904 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:07:59,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:59,905 INFO L225 Difference]: With dead ends: 585 [2021-06-12 20:07:59,905 INFO L226 Difference]: Without dead ends: 564 [2021-06-12 20:07:59,905 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 185.6ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:07:59,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-06-12 20:07:59,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 477. [2021-06-12 20:07:59,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.1596638655462184) internal successors, (1504), 476 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:59,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1504 transitions. [2021-06-12 20:07:59,910 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1504 transitions. Word has length 21 [2021-06-12 20:07:59,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:59,910 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1504 transitions. [2021-06-12 20:07:59,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:59,910 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1504 transitions. [2021-06-12 20:07:59,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:07:59,910 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:59,910 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:00,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 989 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5783 [2021-06-12 20:08:00,111 INFO L430 AbstractCegarLoop]: === Iteration 1001 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:00,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:00,111 INFO L82 PathProgramCache]: Analyzing trace with hash 942902977, now seen corresponding path program 989 times [2021-06-12 20:08:00,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:00,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817903880] [2021-06-12 20:08:00,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:00,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:00,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:00,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817903880] [2021-06-12 20:08:00,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817903880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:00,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42766938] [2021-06-12 20:08:00,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 990 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 990 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:00,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:08:00,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:00,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:08:00,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:00,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:00,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:00,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:00,287 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:00,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:00,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:08:00,303 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:08:00,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:00,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:00,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:00,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:00,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:00,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:00,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:00,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:00,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:00,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:00,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:08:00,386 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:00,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:00,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:08:00,389 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:00,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:00,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:00,410 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:31 [2021-06-12 20:08:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:00,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42766938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:00,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:00,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:08:00,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381548625] [2021-06-12 20:08:00,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:08:00,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:00,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:08:00,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:08:00,487 INFO L87 Difference]: Start difference. First operand 477 states and 1504 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:00,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:00,873 INFO L93 Difference]: Finished difference Result 669 states and 2070 transitions. [2021-06-12 20:08:00,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:08:00,873 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:00,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:00,874 INFO L225 Difference]: With dead ends: 669 [2021-06-12 20:08:00,874 INFO L226 Difference]: Without dead ends: 648 [2021-06-12 20:08:00,874 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 297.4ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:08:00,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-06-12 20:08:00,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 473. [2021-06-12 20:08:00,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.1504237288135593) internal successors, (1487), 472 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:00,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1487 transitions. [2021-06-12 20:08:00,879 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1487 transitions. Word has length 21 [2021-06-12 20:08:00,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:00,880 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1487 transitions. [2021-06-12 20:08:00,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:00,880 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1487 transitions. [2021-06-12 20:08:00,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:00,880 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:00,880 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:01,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 990 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5790 [2021-06-12 20:08:01,081 INFO L430 AbstractCegarLoop]: === Iteration 1002 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:01,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:01,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1955677141, now seen corresponding path program 990 times [2021-06-12 20:08:01,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:01,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563066550] [2021-06-12 20:08:01,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:01,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:01,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563066550] [2021-06-12 20:08:01,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563066550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:01,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666488006] [2021-06-12 20:08:01,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 991 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 991 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:01,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:08:01,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:01,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:01,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:01,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:01,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:01,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:01,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:01,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:08:01,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 20:08:01,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:01,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:01,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:01,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:01,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:01,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:08:01,361 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:01,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:01,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:01,368 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:7 [2021-06-12 20:08:01,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:01,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666488006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:01,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:01,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:08:01,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585995784] [2021-06-12 20:08:01,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:08:01,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:01,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:08:01,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:08:01,399 INFO L87 Difference]: Start difference. First operand 473 states and 1487 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:01,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:01,744 INFO L93 Difference]: Finished difference Result 675 states and 2073 transitions. [2021-06-12 20:08:01,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:08:01,744 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:01,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:01,745 INFO L225 Difference]: With dead ends: 675 [2021-06-12 20:08:01,745 INFO L226 Difference]: Without dead ends: 654 [2021-06-12 20:08:01,745 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 317.5ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:08:01,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-06-12 20:08:01,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 475. [2021-06-12 20:08:01,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.147679324894515) internal successors, (1492), 474 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:01,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1492 transitions. [2021-06-12 20:08:01,750 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1492 transitions. Word has length 21 [2021-06-12 20:08:01,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:01,750 INFO L482 AbstractCegarLoop]: Abstraction has 475 states and 1492 transitions. [2021-06-12 20:08:01,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:01,751 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1492 transitions. [2021-06-12 20:08:01,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:01,751 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:01,751 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:01,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5797,991 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:01,952 INFO L430 AbstractCegarLoop]: === Iteration 1003 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:01,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:01,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1009361993, now seen corresponding path program 991 times [2021-06-12 20:08:01,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:01,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458175241] [2021-06-12 20:08:01,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:02,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:02,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:02,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458175241] [2021-06-12 20:08:02,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458175241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:02,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177147263] [2021-06-12 20:08:02,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 992 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 992 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:02,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:02,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:02,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:02,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:02,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:02,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:02,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:08:02,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 20:08:02,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:02,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:02,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:02,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:02,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:02,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:08:02,205 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:02,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:02,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:02,214 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:10 [2021-06-12 20:08:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:02,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177147263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:02,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:02,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:08:02,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796575265] [2021-06-12 20:08:02,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:02,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:02,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:02,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:02,234 INFO L87 Difference]: Start difference. First operand 475 states and 1492 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:02,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:02,369 INFO L93 Difference]: Finished difference Result 566 states and 1749 transitions. [2021-06-12 20:08:02,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:02,369 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:02,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:02,370 INFO L225 Difference]: With dead ends: 566 [2021-06-12 20:08:02,370 INFO L226 Difference]: Without dead ends: 545 [2021-06-12 20:08:02,370 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 155.5ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:02,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-06-12 20:08:02,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 472. [2021-06-12 20:08:02,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.142250530785563) internal successors, (1480), 471 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:02,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1480 transitions. [2021-06-12 20:08:02,375 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1480 transitions. Word has length 21 [2021-06-12 20:08:02,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:02,375 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1480 transitions. [2021-06-12 20:08:02,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:02,375 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1480 transitions. [2021-06-12 20:08:02,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:02,375 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:02,375 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:02,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5800,992 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:02,576 INFO L430 AbstractCegarLoop]: === Iteration 1004 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:02,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:02,576 INFO L82 PathProgramCache]: Analyzing trace with hash 94280505, now seen corresponding path program 992 times [2021-06-12 20:08:02,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:02,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477242225] [2021-06-12 20:08:02,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:02,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:02,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477242225] [2021-06-12 20:08:02,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477242225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:02,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336721220] [2021-06-12 20:08:02,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 993 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 993 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:02,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:08:02,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:02,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:02,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:02,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:02,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:02,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:02,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:08:02,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-06-12 20:08:02,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:02,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:02,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:02,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:02,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:02,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:08:02,798 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:02,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:02,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:02,804 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:10 [2021-06-12 20:08:02,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:02,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336721220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:02,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:02,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:08:02,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975610608] [2021-06-12 20:08:02,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:08:02,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:02,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:08:02,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:08:02,849 INFO L87 Difference]: Start difference. First operand 472 states and 1480 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:03,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:03,056 INFO L93 Difference]: Finished difference Result 635 states and 1947 transitions. [2021-06-12 20:08:03,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:08:03,056 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:03,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:03,057 INFO L225 Difference]: With dead ends: 635 [2021-06-12 20:08:03,057 INFO L226 Difference]: Without dead ends: 614 [2021-06-12 20:08:03,057 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 243.6ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:08:03,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-06-12 20:08:03,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 451. [2021-06-12 20:08:03,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 3.1244444444444444) internal successors, (1406), 450 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:03,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1406 transitions. [2021-06-12 20:08:03,063 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1406 transitions. Word has length 21 [2021-06-12 20:08:03,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:03,063 INFO L482 AbstractCegarLoop]: Abstraction has 451 states and 1406 transitions. [2021-06-12 20:08:03,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:03,063 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1406 transitions. [2021-06-12 20:08:03,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:03,063 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:03,063 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:03,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 993 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5803 [2021-06-12 20:08:03,264 INFO L430 AbstractCegarLoop]: === Iteration 1005 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:03,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:03,264 INFO L82 PathProgramCache]: Analyzing trace with hash -460746955, now seen corresponding path program 993 times [2021-06-12 20:08:03,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:03,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250355207] [2021-06-12 20:08:03,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:03,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:03,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:03,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250355207] [2021-06-12 20:08:03,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250355207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:03,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384586753] [2021-06-12 20:08:03,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 994 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 994 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:03,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:08:03,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:03,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:03,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:03,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:03,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:03,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:03,409 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:03,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:03,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:03,418 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:08:03,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:03,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:03,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:03,486 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:03,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:03,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-06-12 20:08:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:03,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384586753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:03,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:03,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:08:03,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052307975] [2021-06-12 20:08:03,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:03,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:03,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:03,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:03,495 INFO L87 Difference]: Start difference. First operand 451 states and 1406 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:03,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:03,675 INFO L93 Difference]: Finished difference Result 565 states and 1735 transitions. [2021-06-12 20:08:03,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:03,675 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:03,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:03,676 INFO L225 Difference]: With dead ends: 565 [2021-06-12 20:08:03,676 INFO L226 Difference]: Without dead ends: 543 [2021-06-12 20:08:03,676 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 150.9ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:03,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-12 20:08:03,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 465. [2021-06-12 20:08:03,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.125) internal successors, (1450), 464 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:03,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1450 transitions. [2021-06-12 20:08:03,681 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1450 transitions. Word has length 21 [2021-06-12 20:08:03,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:03,681 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1450 transitions. [2021-06-12 20:08:03,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:03,681 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1450 transitions. [2021-06-12 20:08:03,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:03,682 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:03,682 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:03,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5805,994 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:03,882 INFO L430 AbstractCegarLoop]: === Iteration 1006 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:03,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:03,882 INFO L82 PathProgramCache]: Analyzing trace with hash -962538291, now seen corresponding path program 994 times [2021-06-12 20:08:03,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:03,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522347245] [2021-06-12 20:08:03,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:03,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:03,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522347245] [2021-06-12 20:08:03,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522347245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:03,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107668030] [2021-06-12 20:08:03,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 995 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 995 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:03,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:08:03,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:03,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:03,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:04,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:04,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:04,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:04,027 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:04,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:04,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:04,037 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:08:04,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:04,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:04,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:04,079 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:04,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:04,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:08:04,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:04,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107668030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:04,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:04,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:08:04,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856913032] [2021-06-12 20:08:04,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:04,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:04,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:04,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:04,093 INFO L87 Difference]: Start difference. First operand 465 states and 1450 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:04,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:04,240 INFO L93 Difference]: Finished difference Result 574 states and 1759 transitions. [2021-06-12 20:08:04,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:04,240 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:04,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:04,241 INFO L225 Difference]: With dead ends: 574 [2021-06-12 20:08:04,241 INFO L226 Difference]: Without dead ends: 552 [2021-06-12 20:08:04,241 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:04,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-06-12 20:08:04,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 462. [2021-06-12 20:08:04,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.119305856832972) internal successors, (1438), 461 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:04,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1438 transitions. [2021-06-12 20:08:04,246 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1438 transitions. Word has length 21 [2021-06-12 20:08:04,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:04,246 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1438 transitions. [2021-06-12 20:08:04,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:04,246 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1438 transitions. [2021-06-12 20:08:04,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:04,246 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:04,246 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:04,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 995 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5808 [2021-06-12 20:08:04,447 INFO L430 AbstractCegarLoop]: === Iteration 1007 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:04,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:04,447 INFO L82 PathProgramCache]: Analyzing trace with hash 164577163, now seen corresponding path program 995 times [2021-06-12 20:08:04,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:04,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624401049] [2021-06-12 20:08:04,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:04,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:04,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624401049] [2021-06-12 20:08:04,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624401049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:04,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533610257] [2021-06-12 20:08:04,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 996 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 996 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:04,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:08:04,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:04,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:08:04,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:04,647 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_286], 1=[o_0]} [2021-06-12 20:08:04,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:04,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:04,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:04,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:04,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:04,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:04,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:04,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:04,697 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:04,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:04,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:04,701 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:04,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:04,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-06-12 20:08:04,738 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:123, output treesize:91 [2021-06-12 20:08:04,962 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-06-12 20:08:04,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:04,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:04,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 20:08:04,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:04,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:04,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:04,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:04,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:04,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:04,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:04,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-12 20:08:04,992 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:04,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:04,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:08:04,995 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:05,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:05,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:05,013 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:81, output treesize:21 [2021-06-12 20:08:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:05,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533610257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:05,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:05,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:08:05,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671508929] [2021-06-12 20:08:05,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:08:05,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:05,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:08:05,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:08:05,061 INFO L87 Difference]: Start difference. First operand 462 states and 1438 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:06,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:06,323 INFO L93 Difference]: Finished difference Result 767 states and 2340 transitions. [2021-06-12 20:08:06,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:08:06,323 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:06,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:06,324 INFO L225 Difference]: With dead ends: 767 [2021-06-12 20:08:06,324 INFO L226 Difference]: Without dead ends: 729 [2021-06-12 20:08:06,324 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1135.3ms TimeCoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:08:06,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-06-12 20:08:06,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 471. [2021-06-12 20:08:06,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.1340425531914895) internal successors, (1473), 470 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:06,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1473 transitions. [2021-06-12 20:08:06,330 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1473 transitions. Word has length 21 [2021-06-12 20:08:06,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:06,330 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1473 transitions. [2021-06-12 20:08:06,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:06,330 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1473 transitions. [2021-06-12 20:08:06,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:06,330 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:06,331 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:06,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5811,996 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:06,531 INFO L430 AbstractCegarLoop]: === Iteration 1008 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:06,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:06,531 INFO L82 PathProgramCache]: Analyzing trace with hash -57631449, now seen corresponding path program 996 times [2021-06-12 20:08:06,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:06,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435223816] [2021-06-12 20:08:06,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:06,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:06,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:06,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:06,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435223816] [2021-06-12 20:08:06,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435223816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:06,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498697110] [2021-06-12 20:08:06,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 997 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 997 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:06,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:08:06,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:06,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:06,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:06,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:06,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:06,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:06,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:06,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 20:08:06,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:06,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:06,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:08:06,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:06,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:06,737 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:06,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:06,738 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:5 [2021-06-12 20:08:06,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:06,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498697110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:06,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:06,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:08:06,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047724781] [2021-06-12 20:08:06,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:08:06,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:06,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:08:06,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:06,763 INFO L87 Difference]: Start difference. First operand 471 states and 1473 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:07,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:07,058 INFO L93 Difference]: Finished difference Result 776 states and 2361 transitions. [2021-06-12 20:08:07,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:08:07,058 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:07,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:07,059 INFO L225 Difference]: With dead ends: 776 [2021-06-12 20:08:07,059 INFO L226 Difference]: Without dead ends: 716 [2021-06-12 20:08:07,059 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 232.8ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:08:07,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-06-12 20:08:07,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 471. [2021-06-12 20:08:07,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.123404255319149) internal successors, (1468), 470 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:07,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1468 transitions. [2021-06-12 20:08:07,065 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1468 transitions. Word has length 21 [2021-06-12 20:08:07,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:07,065 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1468 transitions. [2021-06-12 20:08:07,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:07,065 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1468 transitions. [2021-06-12 20:08:07,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:07,066 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:07,066 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:07,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 997 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5828 [2021-06-12 20:08:07,266 INFO L430 AbstractCegarLoop]: === Iteration 1009 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:07,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:07,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1850969003, now seen corresponding path program 997 times [2021-06-12 20:08:07,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:07,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017806410] [2021-06-12 20:08:07,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:07,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:07,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:07,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017806410] [2021-06-12 20:08:07,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017806410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:07,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778382962] [2021-06-12 20:08:07,365 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 998 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 998 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:07,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:07,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:07,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:07,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:07,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:07,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:07,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:07,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:07,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:07,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:07,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:07,454 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:47, output treesize:31 [2021-06-12 20:08:07,519 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_4]} [2021-06-12 20:08:07,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:07,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:07,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:07,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:07,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:07,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:07,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:08:07,541 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:07,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:07,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:07,554 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:13 [2021-06-12 20:08:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:07,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778382962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:07,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:07,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:08:07,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188578147] [2021-06-12 20:08:07,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:08:07,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:07,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:08:07,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:08:07,600 INFO L87 Difference]: Start difference. First operand 471 states and 1468 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:08,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:08,117 INFO L93 Difference]: Finished difference Result 823 states and 2500 transitions. [2021-06-12 20:08:08,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:08:08,117 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:08,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:08,118 INFO L225 Difference]: With dead ends: 823 [2021-06-12 20:08:08,118 INFO L226 Difference]: Without dead ends: 800 [2021-06-12 20:08:08,119 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 394.2ms TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:08:08,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-06-12 20:08:08,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 475. [2021-06-12 20:08:08,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.1223628691983123) internal successors, (1480), 474 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:08,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1480 transitions. [2021-06-12 20:08:08,124 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1480 transitions. Word has length 21 [2021-06-12 20:08:08,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:08,124 INFO L482 AbstractCegarLoop]: Abstraction has 475 states and 1480 transitions. [2021-06-12 20:08:08,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:08,125 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1480 transitions. [2021-06-12 20:08:08,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:08,125 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:08,125 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:08,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5831,998 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:08,326 INFO L430 AbstractCegarLoop]: === Iteration 1010 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:08,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:08,326 INFO L82 PathProgramCache]: Analyzing trace with hash -147159379, now seen corresponding path program 998 times [2021-06-12 20:08:08,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:08,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078711453] [2021-06-12 20:08:08,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:08,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:08,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:08,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078711453] [2021-06-12 20:08:08,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078711453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:08,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950428365] [2021-06-12 20:08:08,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 999 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 999 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:08,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:08:08,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:08,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:08,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:08,537 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_290], 1=[o_0]} [2021-06-12 20:08:08,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:08,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:08,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:08,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:08,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:08,557 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:08,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:08,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:08:08,570 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:36 [2021-06-12 20:08:08,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:08,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:08,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:08,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:08,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:08,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:08:08,648 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:08,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:08,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:08,655 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:10 [2021-06-12 20:08:08,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:08,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950428365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:08,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:08,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:08:08,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577106269] [2021-06-12 20:08:08,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:08:08,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:08,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:08:08,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:08:08,700 INFO L87 Difference]: Start difference. First operand 475 states and 1480 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:09,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:09,203 INFO L93 Difference]: Finished difference Result 719 states and 2200 transitions. [2021-06-12 20:08:09,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:08:09,203 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:09,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:09,204 INFO L225 Difference]: With dead ends: 719 [2021-06-12 20:08:09,204 INFO L226 Difference]: Without dead ends: 700 [2021-06-12 20:08:09,204 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 457.8ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:08:09,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-06-12 20:08:09,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 471. [2021-06-12 20:08:09,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.1148936170212767) internal successors, (1464), 470 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:09,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1464 transitions. [2021-06-12 20:08:09,209 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1464 transitions. Word has length 21 [2021-06-12 20:08:09,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:09,210 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1464 transitions. [2021-06-12 20:08:09,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:09,210 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1464 transitions. [2021-06-12 20:08:09,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:09,210 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:09,210 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:09,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5839,999 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:09,411 INFO L430 AbstractCegarLoop]: === Iteration 1011 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:09,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:09,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1876121267, now seen corresponding path program 999 times [2021-06-12 20:08:09,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:09,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474511928] [2021-06-12 20:08:09,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:09,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:09,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:09,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474511928] [2021-06-12 20:08:09,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474511928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:09,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559566757] [2021-06-12 20:08:09,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1000 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1000 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:09,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:08:09,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:09,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:09,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:09,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:09,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:09,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:09,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:09,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:09,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:09,561 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:08:09,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:09,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:09,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:09,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:09,621 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:09,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:09,627 INFO L518 ElimStorePlain]: Eliminatee v_prenex_292 vanished before elimination [2021-06-12 20:08:09,627 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:09,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:09,628 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:15 [2021-06-12 20:08:09,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:09,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559566757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:09,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:09,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:08:09,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077697896] [2021-06-12 20:08:09,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:09,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:09,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:09,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:09,654 INFO L87 Difference]: Start difference. First operand 471 states and 1464 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:09,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:09,821 INFO L93 Difference]: Finished difference Result 619 states and 1903 transitions. [2021-06-12 20:08:09,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:09,821 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:09,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:09,822 INFO L225 Difference]: With dead ends: 619 [2021-06-12 20:08:09,822 INFO L226 Difference]: Without dead ends: 590 [2021-06-12 20:08:09,822 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 148.6ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:09,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-06-12 20:08:09,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 471. [2021-06-12 20:08:09,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.1148936170212767) internal successors, (1464), 470 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:09,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1464 transitions. [2021-06-12 20:08:09,827 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1464 transitions. Word has length 21 [2021-06-12 20:08:09,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:09,827 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1464 transitions. [2021-06-12 20:08:09,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:09,827 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1464 transitions. [2021-06-12 20:08:09,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:09,828 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:09,828 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:10,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5844,1000 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:10,028 INFO L430 AbstractCegarLoop]: === Iteration 1012 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:10,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:10,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1324147111, now seen corresponding path program 1000 times [2021-06-12 20:08:10,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:10,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533901555] [2021-06-12 20:08:10,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:10,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:10,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:10,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533901555] [2021-06-12 20:08:10,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533901555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:10,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459876578] [2021-06-12 20:08:10,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1001 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1001 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:10,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:08:10,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:10,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:10,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:10,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:10,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:10,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:10,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:10,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 20:08:10,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:10,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:10,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:08:10,209 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:10,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:10,216 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:10,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:10,216 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:08:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:10,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459876578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:10,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:10,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:08:10,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233533732] [2021-06-12 20:08:10,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:10,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:10,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:10,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:10,235 INFO L87 Difference]: Start difference. First operand 471 states and 1464 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:10,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:10,418 INFO L93 Difference]: Finished difference Result 582 states and 1786 transitions. [2021-06-12 20:08:10,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:10,418 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:10,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:10,419 INFO L225 Difference]: With dead ends: 582 [2021-06-12 20:08:10,419 INFO L226 Difference]: Without dead ends: 555 [2021-06-12 20:08:10,419 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:10,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-06-12 20:08:10,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 468. [2021-06-12 20:08:10,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.1177730192719486) internal successors, (1456), 467 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:10,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1456 transitions. [2021-06-12 20:08:10,424 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1456 transitions. Word has length 21 [2021-06-12 20:08:10,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:10,424 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1456 transitions. [2021-06-12 20:08:10,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:10,424 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1456 transitions. [2021-06-12 20:08:10,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:10,425 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:10,425 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:10,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5852,1001 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:10,625 INFO L430 AbstractCegarLoop]: === Iteration 1013 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:10,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:10,625 INFO L82 PathProgramCache]: Analyzing trace with hash 699861347, now seen corresponding path program 1001 times [2021-06-12 20:08:10,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:10,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159172808] [2021-06-12 20:08:10,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:10,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:10,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159172808] [2021-06-12 20:08:10,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159172808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:10,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526071029] [2021-06-12 20:08:10,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1002 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1002 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:10,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:08:10,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:10,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:10,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:10,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:10,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:10,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:10,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:10,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:10,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:10,775 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:08:10,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:10,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:10,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:10,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:10,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:10,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:10,823 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:10,823 INFO L518 ElimStorePlain]: Eliminatee v_prenex_294 vanished before elimination [2021-06-12 20:08:10,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:10,824 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:21 [2021-06-12 20:08:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:10,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526071029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:10,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:10,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:08:10,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344427638] [2021-06-12 20:08:10,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:10,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:10,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:10,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:10,857 INFO L87 Difference]: Start difference. First operand 468 states and 1456 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:11,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:11,033 INFO L93 Difference]: Finished difference Result 622 states and 1911 transitions. [2021-06-12 20:08:11,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:11,034 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:11,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:11,034 INFO L225 Difference]: With dead ends: 622 [2021-06-12 20:08:11,034 INFO L226 Difference]: Without dead ends: 593 [2021-06-12 20:08:11,035 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:11,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-06-12 20:08:11,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 468. [2021-06-12 20:08:11,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.1177730192719486) internal successors, (1456), 467 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:11,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1456 transitions. [2021-06-12 20:08:11,039 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1456 transitions. Word has length 21 [2021-06-12 20:08:11,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:11,039 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1456 transitions. [2021-06-12 20:08:11,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:11,040 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1456 transitions. [2021-06-12 20:08:11,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:11,040 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:11,040 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:11,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5856,1002 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:11,240 INFO L430 AbstractCegarLoop]: === Iteration 1014 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:11,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:11,241 INFO L82 PathProgramCache]: Analyzing trace with hash 997127757, now seen corresponding path program 1002 times [2021-06-12 20:08:11,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:11,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661808985] [2021-06-12 20:08:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:11,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:11,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:11,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661808985] [2021-06-12 20:08:11,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661808985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:11,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57417714] [2021-06-12 20:08:11,325 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1003 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1003 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:11,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:08:11,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:11,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:11,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:11,435 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_295], 1=[o_0]} [2021-06-12 20:08:11,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:11,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:11,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:11,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:11,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:11,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:11,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:11,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:08:11,468 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:36 [2021-06-12 20:08:11,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:11,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:11,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:11,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:11,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:11,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:11,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:11,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:11,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:08:11,536 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:11,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:11,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:11,552 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:64, output treesize:19 [2021-06-12 20:08:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:11,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57417714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:11,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:11,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:08:11,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324756261] [2021-06-12 20:08:11,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:11,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:11,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:11,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:11,597 INFO L87 Difference]: Start difference. First operand 468 states and 1456 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:11,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:11,856 INFO L93 Difference]: Finished difference Result 700 states and 2136 transitions. [2021-06-12 20:08:11,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:11,856 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:11,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:11,857 INFO L225 Difference]: With dead ends: 700 [2021-06-12 20:08:11,857 INFO L226 Difference]: Without dead ends: 677 [2021-06-12 20:08:11,857 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 237.6ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:11,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-06-12 20:08:11,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 472. [2021-06-12 20:08:11,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.1358811040339702) internal successors, (1477), 471 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:11,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1477 transitions. [2021-06-12 20:08:11,862 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1477 transitions. Word has length 21 [2021-06-12 20:08:11,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:11,863 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1477 transitions. [2021-06-12 20:08:11,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:11,863 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1477 transitions. [2021-06-12 20:08:11,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:11,863 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:11,863 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:12,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1003 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5861 [2021-06-12 20:08:12,064 INFO L430 AbstractCegarLoop]: === Iteration 1015 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:12,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:12,064 INFO L82 PathProgramCache]: Analyzing trace with hash 712865073, now seen corresponding path program 1003 times [2021-06-12 20:08:12,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:12,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715126033] [2021-06-12 20:08:12,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:12,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:12,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:12,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:12,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715126033] [2021-06-12 20:08:12,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715126033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:12,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182596846] [2021-06-12 20:08:12,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1004 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1004 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:12,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:12,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:12,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:12,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:12,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:12,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:12,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 20:08:12,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:08:12,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:12,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:12,240 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:12,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:12,248 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:12,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:12,249 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:45, output treesize:19 [2021-06-12 20:08:12,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:12,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182596846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:12,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:12,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:08:12,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997661070] [2021-06-12 20:08:12,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:08:12,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:12,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:08:12,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:12,322 INFO L87 Difference]: Start difference. First operand 472 states and 1477 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:12,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:12,678 INFO L93 Difference]: Finished difference Result 698 states and 2137 transitions. [2021-06-12 20:08:12,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:08:12,678 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:12,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:12,679 INFO L225 Difference]: With dead ends: 698 [2021-06-12 20:08:12,679 INFO L226 Difference]: Without dead ends: 671 [2021-06-12 20:08:12,679 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 280.7ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:08:12,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-06-12 20:08:12,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 470. [2021-06-12 20:08:12,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.1257995735607675) internal successors, (1466), 469 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:12,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1466 transitions. [2021-06-12 20:08:12,684 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1466 transitions. Word has length 21 [2021-06-12 20:08:12,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:12,684 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1466 transitions. [2021-06-12 20:08:12,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:12,684 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1466 transitions. [2021-06-12 20:08:12,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:12,685 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:12,685 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:12,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1004 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5871 [2021-06-12 20:08:12,885 INFO L430 AbstractCegarLoop]: === Iteration 1016 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:12,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:12,886 INFO L82 PathProgramCache]: Analyzing trace with hash -711245251, now seen corresponding path program 1004 times [2021-06-12 20:08:12,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:12,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776154178] [2021-06-12 20:08:12,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:12,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:12,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:12,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776154178] [2021-06-12 20:08:12,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776154178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:12,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563429263] [2021-06-12 20:08:12,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1005 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1005 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:13,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:08:13,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:13,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:13,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:13,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:13,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:13,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:13,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:13,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:13,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:19 [2021-06-12 20:08:13,115 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_4]} [2021-06-12 20:08:13,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:13,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:13,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:13,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:13,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:08:13,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:13,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:13,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:13,130 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:7 [2021-06-12 20:08:13,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:13,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563429263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:13,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:13,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:08:13,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274157441] [2021-06-12 20:08:13,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:08:13,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:13,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:08:13,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:08:13,158 INFO L87 Difference]: Start difference. First operand 470 states and 1466 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:13,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:13,508 INFO L93 Difference]: Finished difference Result 736 states and 2259 transitions. [2021-06-12 20:08:13,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:08:13,508 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:13,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:13,509 INFO L225 Difference]: With dead ends: 736 [2021-06-12 20:08:13,509 INFO L226 Difference]: Without dead ends: 717 [2021-06-12 20:08:13,509 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 321.2ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:08:13,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-06-12 20:08:13,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 478. [2021-06-12 20:08:13,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.1320754716981134) internal successors, (1494), 477 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:13,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1494 transitions. [2021-06-12 20:08:13,515 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1494 transitions. Word has length 21 [2021-06-12 20:08:13,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:13,515 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1494 transitions. [2021-06-12 20:08:13,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:13,515 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1494 transitions. [2021-06-12 20:08:13,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:13,515 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:13,515 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:13,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1005 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5880 [2021-06-12 20:08:13,716 INFO L430 AbstractCegarLoop]: === Iteration 1017 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:13,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:13,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1550085565, now seen corresponding path program 1005 times [2021-06-12 20:08:13,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:13,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262678788] [2021-06-12 20:08:13,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:13,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:13,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:13,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262678788] [2021-06-12 20:08:13,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262678788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:13,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570173156] [2021-06-12 20:08:13,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1006 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1006 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:13,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:08:13,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:13,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:13,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:13,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:13,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:13,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:13,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:13,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:08:13,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-06-12 20:08:13,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:13,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:13,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:13,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:14,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:14,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:08:14,001 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:14,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:14,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:14,008 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:10 [2021-06-12 20:08:14,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:14,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570173156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:14,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:14,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:08:14,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924011421] [2021-06-12 20:08:14,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:08:14,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:14,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:08:14,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:08:14,052 INFO L87 Difference]: Start difference. First operand 478 states and 1494 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:14,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:14,523 INFO L93 Difference]: Finished difference Result 728 states and 2239 transitions. [2021-06-12 20:08:14,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:08:14,524 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:14,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:14,525 INFO L225 Difference]: With dead ends: 728 [2021-06-12 20:08:14,525 INFO L226 Difference]: Without dead ends: 709 [2021-06-12 20:08:14,525 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 431.2ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:08:14,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-06-12 20:08:14,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 474. [2021-06-12 20:08:14,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.124735729386892) internal successors, (1478), 473 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:14,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1478 transitions. [2021-06-12 20:08:14,530 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1478 transitions. Word has length 21 [2021-06-12 20:08:14,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:14,530 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1478 transitions. [2021-06-12 20:08:14,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:14,530 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1478 transitions. [2021-06-12 20:08:14,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:14,530 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:14,530 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:14,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1006 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5882 [2021-06-12 20:08:14,731 INFO L430 AbstractCegarLoop]: === Iteration 1018 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:14,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:14,731 INFO L82 PathProgramCache]: Analyzing trace with hash -2126619563, now seen corresponding path program 1006 times [2021-06-12 20:08:14,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:14,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690413990] [2021-06-12 20:08:14,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:14,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:14,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690413990] [2021-06-12 20:08:14,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690413990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:14,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189384541] [2021-06-12 20:08:14,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1007 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1007 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:14,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:08:14,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:14,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:14,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:14,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:14,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:14,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:14,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:14,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:08:14,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:14,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:14,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:14,917 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:14,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:14,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:08:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:14,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189384541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:14,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:14,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:08:14,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92594124] [2021-06-12 20:08:14,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:14,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:14,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:14,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:14,930 INFO L87 Difference]: Start difference. First operand 474 states and 1478 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:15,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:15,069 INFO L93 Difference]: Finished difference Result 592 states and 1828 transitions. [2021-06-12 20:08:15,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:15,069 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:15,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:15,070 INFO L225 Difference]: With dead ends: 592 [2021-06-12 20:08:15,070 INFO L226 Difference]: Without dead ends: 573 [2021-06-12 20:08:15,070 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 110.9ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:15,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-06-12 20:08:15,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 470. [2021-06-12 20:08:15,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.1257995735607675) internal successors, (1466), 469 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:15,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1466 transitions. [2021-06-12 20:08:15,075 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1466 transitions. Word has length 21 [2021-06-12 20:08:15,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:15,075 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1466 transitions. [2021-06-12 20:08:15,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:15,076 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1466 transitions. [2021-06-12 20:08:15,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:15,076 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:15,076 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:15,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5885,1007 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:15,276 INFO L430 AbstractCegarLoop]: === Iteration 1019 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:15,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:15,277 INFO L82 PathProgramCache]: Analyzing trace with hash 110136757, now seen corresponding path program 1007 times [2021-06-12 20:08:15,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:15,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228824727] [2021-06-12 20:08:15,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:15,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:15,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:15,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228824727] [2021-06-12 20:08:15,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228824727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:15,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998708817] [2021-06-12 20:08:15,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1008 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1008 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:15,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:08:15,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:15,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:15,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:15,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:15,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:15,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:15,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:15,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-06-12 20:08:15,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:08:15,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:15,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:08:15,449 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:15,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:15,455 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:15,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:15,456 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-12 20:08:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:15,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998708817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:15,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:15,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:08:15,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219061049] [2021-06-12 20:08:15,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:15,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:15,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:15,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:15,473 INFO L87 Difference]: Start difference. First operand 470 states and 1466 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:15,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:15,654 INFO L93 Difference]: Finished difference Result 591 states and 1819 transitions. [2021-06-12 20:08:15,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:15,654 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:15,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:15,655 INFO L225 Difference]: With dead ends: 591 [2021-06-12 20:08:15,655 INFO L226 Difference]: Without dead ends: 555 [2021-06-12 20:08:15,655 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:15,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-06-12 20:08:15,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 470. [2021-06-12 20:08:15,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.1257995735607675) internal successors, (1466), 469 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:15,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1466 transitions. [2021-06-12 20:08:15,660 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1466 transitions. Word has length 21 [2021-06-12 20:08:15,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:15,660 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1466 transitions. [2021-06-12 20:08:15,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:15,660 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1466 transitions. [2021-06-12 20:08:15,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:15,661 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:15,661 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:15,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5887,1008 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:15,861 INFO L430 AbstractCegarLoop]: === Iteration 1020 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:15,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:15,862 INFO L82 PathProgramCache]: Analyzing trace with hash -984562161, now seen corresponding path program 1008 times [2021-06-12 20:08:15,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:15,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690865116] [2021-06-12 20:08:15,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:15,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:15,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690865116] [2021-06-12 20:08:15,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690865116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:15,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920406030] [2021-06-12 20:08:15,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1009 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1009 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:15,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:08:15,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:15,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:15,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:16,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:16,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:16,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:16,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:16,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:16,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:16,017 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:08:16,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:16,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:16,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:16,047 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:16,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:16,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:16,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:16,055 INFO L518 ElimStorePlain]: Eliminatee v_prenex_297 vanished before elimination [2021-06-12 20:08:16,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:16,056 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:13 [2021-06-12 20:08:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:16,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920406030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:16,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:16,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:08:16,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534530832] [2021-06-12 20:08:16,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:16,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:16,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:16,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:16,084 INFO L87 Difference]: Start difference. First operand 470 states and 1466 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:16,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:16,271 INFO L93 Difference]: Finished difference Result 632 states and 1938 transitions. [2021-06-12 20:08:16,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:08:16,271 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:16,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:16,272 INFO L225 Difference]: With dead ends: 632 [2021-06-12 20:08:16,272 INFO L226 Difference]: Without dead ends: 605 [2021-06-12 20:08:16,272 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 139.0ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:16,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-06-12 20:08:16,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 485. [2021-06-12 20:08:16,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.12396694214876) internal successors, (1512), 484 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:16,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1512 transitions. [2021-06-12 20:08:16,277 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1512 transitions. Word has length 21 [2021-06-12 20:08:16,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:16,277 INFO L482 AbstractCegarLoop]: Abstraction has 485 states and 1512 transitions. [2021-06-12 20:08:16,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:16,277 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1512 transitions. [2021-06-12 20:08:16,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:16,278 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:16,278 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:16,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1009 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5890 [2021-06-12 20:08:16,478 INFO L430 AbstractCegarLoop]: === Iteration 1021 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:16,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:16,479 INFO L82 PathProgramCache]: Analyzing trace with hash 896190777, now seen corresponding path program 1009 times [2021-06-12 20:08:16,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:16,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799257217] [2021-06-12 20:08:16,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:16,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:16,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:16,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799257217] [2021-06-12 20:08:16,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799257217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:16,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906496060] [2021-06-12 20:08:16,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1010 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1010 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:16,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:16,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:16,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:16,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:16,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:16,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:16,633 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:16,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:16,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:16,640 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:08:16,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:16,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:16,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:16,672 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:16,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:16,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:08:16,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:16,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906496060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:16,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:16,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:08:16,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660676048] [2021-06-12 20:08:16,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:16,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:16,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:16,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:16,683 INFO L87 Difference]: Start difference. First operand 485 states and 1512 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:16,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:16,862 INFO L93 Difference]: Finished difference Result 582 states and 1785 transitions. [2021-06-12 20:08:16,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:16,863 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:16,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:16,864 INFO L225 Difference]: With dead ends: 582 [2021-06-12 20:08:16,864 INFO L226 Difference]: Without dead ends: 561 [2021-06-12 20:08:16,864 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 116.7ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:16,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-06-12 20:08:16,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 467. [2021-06-12 20:08:16,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.128755364806867) internal successors, (1458), 466 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:16,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1458 transitions. [2021-06-12 20:08:16,869 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1458 transitions. Word has length 21 [2021-06-12 20:08:16,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:16,869 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1458 transitions. [2021-06-12 20:08:16,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:16,869 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1458 transitions. [2021-06-12 20:08:16,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:16,869 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:16,869 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:17,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5898,1010 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:17,070 INFO L430 AbstractCegarLoop]: === Iteration 1022 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:17,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:17,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1548483819, now seen corresponding path program 1010 times [2021-06-12 20:08:17,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:17,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308360552] [2021-06-12 20:08:17,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:17,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:17,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308360552] [2021-06-12 20:08:17,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308360552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:17,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960563640] [2021-06-12 20:08:17,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1011 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1011 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:17,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:08:17,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:17,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:17,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:17,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:17,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:17,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:17,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:17,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-06-12 20:08:17,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:08:17,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:17,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:08:17,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:17,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:17,240 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:17,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:17,240 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-06-12 20:08:17,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:17,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960563640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:17,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:17,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:08:17,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303799439] [2021-06-12 20:08:17,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:17,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:17,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:17,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:17,274 INFO L87 Difference]: Start difference. First operand 467 states and 1458 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:17,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:17,433 INFO L93 Difference]: Finished difference Result 606 states and 1859 transitions. [2021-06-12 20:08:17,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:17,433 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:17,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:17,434 INFO L225 Difference]: With dead ends: 606 [2021-06-12 20:08:17,434 INFO L226 Difference]: Without dead ends: 570 [2021-06-12 20:08:17,434 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 109.9ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:17,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-12 20:08:17,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 468. [2021-06-12 20:08:17,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.132762312633833) internal successors, (1463), 467 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:17,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1463 transitions. [2021-06-12 20:08:17,443 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1463 transitions. Word has length 21 [2021-06-12 20:08:17,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:17,444 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1463 transitions. [2021-06-12 20:08:17,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:17,444 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1463 transitions. [2021-06-12 20:08:17,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:17,444 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:17,444 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:17,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5901,1011 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:17,645 INFO L430 AbstractCegarLoop]: === Iteration 1023 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:17,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:17,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1845750229, now seen corresponding path program 1011 times [2021-06-12 20:08:17,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:17,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561508310] [2021-06-12 20:08:17,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:17,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:17,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:17,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561508310] [2021-06-12 20:08:17,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561508310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:17,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788925169] [2021-06-12 20:08:17,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1012 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1012 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:17,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:08:17,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:17,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:17,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:17,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:17,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:17,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:17,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:17,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:17,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:08:17,831 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:08:17,864 INFO L446 ElimStorePlain]: Different costs {0=[o_0, o_4], 1=[v_prenex_298, v_prenex_299]} [2021-06-12 20:08:17,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:17,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:17,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:17,880 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:17,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:17,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:17,883 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:17,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:17,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:17,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:08:17,896 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:17,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:17,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:17,907 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:51, output treesize:19 [2021-06-12 20:08:17,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:17,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788925169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:17,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:17,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:08:17,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523762534] [2021-06-12 20:08:17,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:08:17,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:17,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:08:17,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:17,960 INFO L87 Difference]: Start difference. First operand 468 states and 1463 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:18,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:18,178 INFO L93 Difference]: Finished difference Result 713 states and 2182 transitions. [2021-06-12 20:08:18,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:08:18,178 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:18,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:18,179 INFO L225 Difference]: With dead ends: 713 [2021-06-12 20:08:18,179 INFO L226 Difference]: Without dead ends: 690 [2021-06-12 20:08:18,179 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 191.4ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:08:18,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-06-12 20:08:18,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 474. [2021-06-12 20:08:18,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.141649048625793) internal successors, (1486), 473 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:18,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1486 transitions. [2021-06-12 20:08:18,185 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1486 transitions. Word has length 21 [2021-06-12 20:08:18,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:18,185 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1486 transitions. [2021-06-12 20:08:18,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:18,185 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1486 transitions. [2021-06-12 20:08:18,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:18,185 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:18,185 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:18,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5904,1012 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:18,386 INFO L430 AbstractCegarLoop]: === Iteration 1024 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:18,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:18,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1561487545, now seen corresponding path program 1012 times [2021-06-12 20:08:18,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:18,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320454588] [2021-06-12 20:08:18,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:18,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:18,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:18,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320454588] [2021-06-12 20:08:18,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320454588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:18,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704889017] [2021-06-12 20:08:18,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1013 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1013 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:18,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:08:18,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:18,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:18,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:18,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:18,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:18,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:18,578 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:18,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:18,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:18,587 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:08:18,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:18,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:18,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:18,623 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:18,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:18,626 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:18,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:18,634 INFO L518 ElimStorePlain]: Eliminatee v_prenex_301 vanished before elimination [2021-06-12 20:08:18,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:18,635 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:19 [2021-06-12 20:08:18,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:18,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704889017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:18,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:18,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:08:18,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459583732] [2021-06-12 20:08:18,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:08:18,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:18,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:08:18,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:18,707 INFO L87 Difference]: Start difference. First operand 474 states and 1486 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:19,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:19,127 INFO L93 Difference]: Finished difference Result 744 states and 2268 transitions. [2021-06-12 20:08:19,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:08:19,127 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:19,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:19,128 INFO L225 Difference]: With dead ends: 744 [2021-06-12 20:08:19,128 INFO L226 Difference]: Without dead ends: 717 [2021-06-12 20:08:19,128 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 361.6ms TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:08:19,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-06-12 20:08:19,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 492. [2021-06-12 20:08:19,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 3.1486761710794298) internal successors, (1546), 491 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:19,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1546 transitions. [2021-06-12 20:08:19,134 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1546 transitions. Word has length 21 [2021-06-12 20:08:19,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:19,134 INFO L482 AbstractCegarLoop]: Abstraction has 492 states and 1546 transitions. [2021-06-12 20:08:19,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:19,134 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1546 transitions. [2021-06-12 20:08:19,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:19,135 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:19,135 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:19,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1013 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5913 [2021-06-12 20:08:19,335 INFO L430 AbstractCegarLoop]: === Iteration 1025 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:19,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:19,335 INFO L82 PathProgramCache]: Analyzing trace with hash -399259421, now seen corresponding path program 1013 times [2021-06-12 20:08:19,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:19,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401969826] [2021-06-12 20:08:19,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:19,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:19,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:19,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:19,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401969826] [2021-06-12 20:08:19,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401969826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:19,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071878713] [2021-06-12 20:08:19,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1014 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1014 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:19,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:08:19,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:19,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:08:19,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:19,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:19,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:19,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:19,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:19,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:19,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:08:19,526 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:08:19,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:19,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:19,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:19,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:19,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:19,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:19,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:19,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:19,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:19,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:19,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:08:19,606 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:19,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:19,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:08:19,608 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:19,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:19,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:19,630 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:31 [2021-06-12 20:08:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:19,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071878713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:19,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:19,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:08:19,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283121742] [2021-06-12 20:08:19,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:08:19,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:19,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:08:19,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:08:19,708 INFO L87 Difference]: Start difference. First operand 492 states and 1546 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:20,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:20,072 INFO L93 Difference]: Finished difference Result 761 states and 2350 transitions. [2021-06-12 20:08:20,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:08:20,073 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:20,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:20,074 INFO L225 Difference]: With dead ends: 761 [2021-06-12 20:08:20,074 INFO L226 Difference]: Without dead ends: 742 [2021-06-12 20:08:20,074 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 326.0ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:08:20,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-06-12 20:08:20,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 490. [2021-06-12 20:08:20,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.1513292433537834) internal successors, (1541), 489 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:20,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1541 transitions. [2021-06-12 20:08:20,079 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1541 transitions. Word has length 21 [2021-06-12 20:08:20,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:20,080 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1541 transitions. [2021-06-12 20:08:20,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:20,080 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1541 transitions. [2021-06-12 20:08:20,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:20,080 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:20,080 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:20,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5924,1014 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:20,281 INFO L430 AbstractCegarLoop]: === Iteration 1026 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:20,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:20,281 INFO L82 PathProgramCache]: Analyzing trace with hash 146113233, now seen corresponding path program 1014 times [2021-06-12 20:08:20,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:20,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434926931] [2021-06-12 20:08:20,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:20,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:20,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:20,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434926931] [2021-06-12 20:08:20,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434926931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:20,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172676921] [2021-06-12 20:08:20,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1015 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1015 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:20,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:08:20,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:20,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:20,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:20,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:20,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:20,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:20,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:20,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:20,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:20,425 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:08:20,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:20,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:20,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:20,483 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:20,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:20,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:08:20,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:20,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172676921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:20,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:20,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:08:20,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793829272] [2021-06-12 20:08:20,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:20,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:20,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:20,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:20,494 INFO L87 Difference]: Start difference. First operand 490 states and 1541 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:20,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:20,681 INFO L93 Difference]: Finished difference Result 616 states and 1886 transitions. [2021-06-12 20:08:20,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:20,681 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:20,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:20,682 INFO L225 Difference]: With dead ends: 616 [2021-06-12 20:08:20,682 INFO L226 Difference]: Without dead ends: 595 [2021-06-12 20:08:20,682 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 132.5ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:20,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-06-12 20:08:20,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 486. [2021-06-12 20:08:20,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.1525773195876288) internal successors, (1529), 485 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:20,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1529 transitions. [2021-06-12 20:08:20,687 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1529 transitions. Word has length 21 [2021-06-12 20:08:20,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:20,687 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1529 transitions. [2021-06-12 20:08:20,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:20,688 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1529 transitions. [2021-06-12 20:08:20,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:20,688 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:20,688 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:20,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5931,1015 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:20,889 INFO L430 AbstractCegarLoop]: === Iteration 1027 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:20,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:20,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1572871449, now seen corresponding path program 1015 times [2021-06-12 20:08:20,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:20,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439579341] [2021-06-12 20:08:20,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:20,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:20,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:20,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439579341] [2021-06-12 20:08:20,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439579341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:20,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258896883] [2021-06-12 20:08:20,970 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1016 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1016 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:20,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:20,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:20,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:21,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:21,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:21,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:21,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:21,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:21,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:21,042 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:08:21,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:21,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:21,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:21,090 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:21,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:21,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:08:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:21,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258896883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:21,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:21,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:08:21,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930700778] [2021-06-12 20:08:21,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:08:21,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:21,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:08:21,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:21,132 INFO L87 Difference]: Start difference. First operand 486 states and 1529 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:21,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:21,440 INFO L93 Difference]: Finished difference Result 662 states and 2035 transitions. [2021-06-12 20:08:21,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:08:21,440 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:21,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:21,441 INFO L225 Difference]: With dead ends: 662 [2021-06-12 20:08:21,441 INFO L226 Difference]: Without dead ends: 641 [2021-06-12 20:08:21,441 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 252.3ms TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:08:21,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-06-12 20:08:21,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 469. [2021-06-12 20:08:21,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.1324786324786325) internal successors, (1466), 468 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:21,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1466 transitions. [2021-06-12 20:08:21,446 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1466 transitions. Word has length 21 [2021-06-12 20:08:21,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:21,446 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1466 transitions. [2021-06-12 20:08:21,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:21,446 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1466 transitions. [2021-06-12 20:08:21,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:21,447 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:21,447 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:21,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5937,1016 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:21,647 INFO L430 AbstractCegarLoop]: === Iteration 1028 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:21,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:21,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1918116401, now seen corresponding path program 1016 times [2021-06-12 20:08:21,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:21,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573276244] [2021-06-12 20:08:21,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:21,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:21,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:21,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573276244] [2021-06-12 20:08:21,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573276244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:21,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440686074] [2021-06-12 20:08:21,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1017 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1017 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:21,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:08:21,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:21,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:21,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:21,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:21,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:21,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:21,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:21,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:08:21,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:21,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:21,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:21,861 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:21,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:21,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:08:21,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:21,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440686074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:21,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:21,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:08:21,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229965801] [2021-06-12 20:08:21,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:08:21,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:21,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:08:21,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:21,887 INFO L87 Difference]: Start difference. First operand 469 states and 1466 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:22,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:22,239 INFO L93 Difference]: Finished difference Result 732 states and 2236 transitions. [2021-06-12 20:08:22,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:08:22,240 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:22,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:22,241 INFO L225 Difference]: With dead ends: 732 [2021-06-12 20:08:22,241 INFO L226 Difference]: Without dead ends: 713 [2021-06-12 20:08:22,241 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 312.3ms TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:08:22,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-06-12 20:08:22,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 473. [2021-06-12 20:08:22,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.1313559322033897) internal successors, (1478), 472 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:22,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1478 transitions. [2021-06-12 20:08:22,246 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1478 transitions. Word has length 21 [2021-06-12 20:08:22,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:22,246 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1478 transitions. [2021-06-12 20:08:22,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:22,246 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1478 transitions. [2021-06-12 20:08:22,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:22,247 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:22,247 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:22,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5940,1017 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:22,447 INFO L430 AbstractCegarLoop]: === Iteration 1029 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:22,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:22,448 INFO L82 PathProgramCache]: Analyzing trace with hash 343214415, now seen corresponding path program 1017 times [2021-06-12 20:08:22,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:22,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779335723] [2021-06-12 20:08:22,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:22,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:22,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779335723] [2021-06-12 20:08:22,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779335723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:22,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460371128] [2021-06-12 20:08:22,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1018 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1018 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:22,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:08:22,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:22,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:22,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:22,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:22,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:22,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:22,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:22,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:08:22,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:22,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:22,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:22,642 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:22,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:22,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:08:22,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:22,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460371128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:22,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:22,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:08:22,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606924448] [2021-06-12 20:08:22,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:22,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:22,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:22,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:22,655 INFO L87 Difference]: Start difference. First operand 473 states and 1478 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:22,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:22,786 INFO L93 Difference]: Finished difference Result 618 states and 1901 transitions. [2021-06-12 20:08:22,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:22,786 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:22,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:22,787 INFO L225 Difference]: With dead ends: 618 [2021-06-12 20:08:22,787 INFO L226 Difference]: Without dead ends: 599 [2021-06-12 20:08:22,787 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:22,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-06-12 20:08:22,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 469. [2021-06-12 20:08:22,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.123931623931624) internal successors, (1462), 468 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:22,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1462 transitions. [2021-06-12 20:08:22,792 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1462 transitions. Word has length 21 [2021-06-12 20:08:22,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:22,792 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1462 transitions. [2021-06-12 20:08:22,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:22,792 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1462 transitions. [2021-06-12 20:08:22,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:22,793 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:22,793 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:22,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5943,1018 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:22,993 INFO L430 AbstractCegarLoop]: === Iteration 1030 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:22,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:22,993 INFO L82 PathProgramCache]: Analyzing trace with hash 961476583, now seen corresponding path program 1018 times [2021-06-12 20:08:22,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:22,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459256072] [2021-06-12 20:08:22,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:22,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:23,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:23,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:23,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459256072] [2021-06-12 20:08:23,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459256072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:23,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355188340] [2021-06-12 20:08:23,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1019 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1019 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:23,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:08:23,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:23,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:23,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:23,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:23,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:23,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:23,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:23,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:08:23,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:23,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:23,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:23,155 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:23,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:23,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:08:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:23,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355188340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:23,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:23,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:08:23,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693029846] [2021-06-12 20:08:23,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:08:23,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:23,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:08:23,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:08:23,167 INFO L87 Difference]: Start difference. First operand 469 states and 1462 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:23,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:23,294 INFO L93 Difference]: Finished difference Result 616 states and 1881 transitions. [2021-06-12 20:08:23,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:23,295 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:23,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:23,296 INFO L225 Difference]: With dead ends: 616 [2021-06-12 20:08:23,296 INFO L226 Difference]: Without dead ends: 597 [2021-06-12 20:08:23,296 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:08:23,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-06-12 20:08:23,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 453. [2021-06-12 20:08:23,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 3.1106194690265485) internal successors, (1406), 452 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:23,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1406 transitions. [2021-06-12 20:08:23,301 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1406 transitions. Word has length 21 [2021-06-12 20:08:23,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:23,301 INFO L482 AbstractCegarLoop]: Abstraction has 453 states and 1406 transitions. [2021-06-12 20:08:23,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:23,301 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1406 transitions. [2021-06-12 20:08:23,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:23,301 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:23,301 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:23,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1019 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5946 [2021-06-12 20:08:23,502 INFO L430 AbstractCegarLoop]: === Iteration 1031 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:23,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:23,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1656277809, now seen corresponding path program 1019 times [2021-06-12 20:08:23,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:23,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552939794] [2021-06-12 20:08:23,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:23,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:23,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552939794] [2021-06-12 20:08:23,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552939794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:23,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468126285] [2021-06-12 20:08:23,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1020 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1020 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:23,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:08:23,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:23,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:08:23,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:23,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:23,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:23,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:23,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:23,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 20:08:23,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:23,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:23,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:23,635 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:23,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:23,650 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:23,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:23,650 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:31 [2021-06-12 20:08:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:23,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468126285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:23,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:23,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:08:23,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026487209] [2021-06-12 20:08:23,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:23,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:23,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:23,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:23,715 INFO L87 Difference]: Start difference. First operand 453 states and 1406 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:23,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:23,931 INFO L93 Difference]: Finished difference Result 672 states and 2043 transitions. [2021-06-12 20:08:23,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:08:23,931 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:23,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:23,932 INFO L225 Difference]: With dead ends: 672 [2021-06-12 20:08:23,932 INFO L226 Difference]: Without dead ends: 653 [2021-06-12 20:08:23,932 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 193.2ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:23,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-06-12 20:08:23,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 446. [2021-06-12 20:08:23,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 3.1123595505617976) internal successors, (1385), 445 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:23,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1385 transitions. [2021-06-12 20:08:23,937 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1385 transitions. Word has length 21 [2021-06-12 20:08:23,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:23,937 INFO L482 AbstractCegarLoop]: Abstraction has 446 states and 1385 transitions. [2021-06-12 20:08:23,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:23,938 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1385 transitions. [2021-06-12 20:08:23,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:23,938 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:23,938 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:24,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5948,1020 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:24,139 INFO L430 AbstractCegarLoop]: === Iteration 1032 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:24,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:24,139 INFO L82 PathProgramCache]: Analyzing trace with hash 564129229, now seen corresponding path program 1020 times [2021-06-12 20:08:24,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:24,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813851326] [2021-06-12 20:08:24,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:24,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:24,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:24,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:24,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813851326] [2021-06-12 20:08:24,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813851326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:24,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744325639] [2021-06-12 20:08:24,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1021 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1021 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:24,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:08:24,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:24,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:24,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:24,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:24,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:24,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:24,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:24,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-06-12 20:08:24,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:08:24,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:24,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:08:24,294 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:24,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:24,300 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:24,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:24,301 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-12 20:08:24,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:24,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744325639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:24,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:24,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:08:24,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753423081] [2021-06-12 20:08:24,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:08:24,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:24,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:08:24,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:08:24,318 INFO L87 Difference]: Start difference. First operand 446 states and 1385 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:24,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:24,458 INFO L93 Difference]: Finished difference Result 618 states and 1891 transitions. [2021-06-12 20:08:24,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:24,458 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:24,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:24,459 INFO L225 Difference]: With dead ends: 618 [2021-06-12 20:08:24,459 INFO L226 Difference]: Without dead ends: 571 [2021-06-12 20:08:24,459 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:24,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-12 20:08:24,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 451. [2021-06-12 20:08:24,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 3.1066666666666665) internal successors, (1398), 450 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:24,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1398 transitions. [2021-06-12 20:08:24,464 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1398 transitions. Word has length 21 [2021-06-12 20:08:24,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:24,464 INFO L482 AbstractCegarLoop]: Abstraction has 451 states and 1398 transitions. [2021-06-12 20:08:24,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:24,464 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1398 transitions. [2021-06-12 20:08:24,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:24,465 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:24,465 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:24,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5953,1021 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:24,665 INFO L430 AbstractCegarLoop]: === Iteration 1033 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:24,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:24,665 INFO L82 PathProgramCache]: Analyzing trace with hash -530569689, now seen corresponding path program 1021 times [2021-06-12 20:08:24,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:24,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457874000] [2021-06-12 20:08:24,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:24,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:24,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:24,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457874000] [2021-06-12 20:08:24,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457874000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:24,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204534177] [2021-06-12 20:08:24,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1022 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1022 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:24,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:24,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:24,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:24,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:24,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:24,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:24,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:24,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:24,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:24,787 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-12 20:08:24,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:24,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:24,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:24,808 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:24,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:24,814 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:24,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:24,814 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:13 [2021-06-12 20:08:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:24,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204534177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:24,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:24,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:08:24,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636120828] [2021-06-12 20:08:24,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:08:24,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:24,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:08:24,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:08:24,848 INFO L87 Difference]: Start difference. First operand 451 states and 1398 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:25,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:25,014 INFO L93 Difference]: Finished difference Result 740 states and 2250 transitions. [2021-06-12 20:08:25,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:08:25,014 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:25,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:25,015 INFO L225 Difference]: With dead ends: 740 [2021-06-12 20:08:25,015 INFO L226 Difference]: Without dead ends: 713 [2021-06-12 20:08:25,015 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:25,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-06-12 20:08:25,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 471. [2021-06-12 20:08:25,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.1106382978723404) internal successors, (1462), 470 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:25,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1462 transitions. [2021-06-12 20:08:25,020 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1462 transitions. Word has length 21 [2021-06-12 20:08:25,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:25,020 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1462 transitions. [2021-06-12 20:08:25,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:25,020 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1462 transitions. [2021-06-12 20:08:25,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:25,021 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:25,021 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:25,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1022 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5956 [2021-06-12 20:08:25,222 INFO L430 AbstractCegarLoop]: === Iteration 1034 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:25,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:25,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1350183249, now seen corresponding path program 1022 times [2021-06-12 20:08:25,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:25,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448569457] [2021-06-12 20:08:25,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:25,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:25,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:25,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448569457] [2021-06-12 20:08:25,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448569457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:25,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767358759] [2021-06-12 20:08:25,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1023 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1023 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:25,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:08:25,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:25,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:25,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:25,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:25,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:25,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:25,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:25,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:25,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:25,343 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-12 20:08:25,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:25,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:25,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:25,370 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:25,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:25,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:08:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:25,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767358759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:25,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:25,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:08:25,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034033216] [2021-06-12 20:08:25,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:08:25,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:25,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:08:25,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:08:25,385 INFO L87 Difference]: Start difference. First operand 471 states and 1462 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:25,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:25,508 INFO L93 Difference]: Finished difference Result 713 states and 2168 transitions. [2021-06-12 20:08:25,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:25,509 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:25,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:25,509 INFO L225 Difference]: With dead ends: 713 [2021-06-12 20:08:25,509 INFO L226 Difference]: Without dead ends: 692 [2021-06-12 20:08:25,510 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:08:25,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-06-12 20:08:25,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 468. [2021-06-12 20:08:25,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.113490364025696) internal successors, (1454), 467 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:25,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1454 transitions. [2021-06-12 20:08:25,515 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1454 transitions. Word has length 21 [2021-06-12 20:08:25,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:25,515 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1454 transitions. [2021-06-12 20:08:25,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:25,515 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1454 transitions. [2021-06-12 20:08:25,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:25,516 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:25,516 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:25,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5963,1023 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:25,716 INFO L430 AbstractCegarLoop]: === Iteration 1035 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:25,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:25,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1856529515, now seen corresponding path program 1023 times [2021-06-12 20:08:25,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:25,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594467114] [2021-06-12 20:08:25,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:25,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:25,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:25,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594467114] [2021-06-12 20:08:25,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594467114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:25,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50855454] [2021-06-12 20:08:25,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1024 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1024 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:25,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:08:25,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:25,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:25,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:25,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:25,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:25,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:25,831 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:25,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:25,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:25,834 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-12 20:08:25,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:25,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:25,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:25,848 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:25,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:25,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:08:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:25,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50855454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:25,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:25,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:08:25,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322691961] [2021-06-12 20:08:25,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:08:25,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:25,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:08:25,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:08:25,878 INFO L87 Difference]: Start difference. First operand 468 states and 1454 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:26,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:26,012 INFO L93 Difference]: Finished difference Result 716 states and 2186 transitions. [2021-06-12 20:08:26,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:26,012 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:26,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:26,013 INFO L225 Difference]: With dead ends: 716 [2021-06-12 20:08:26,013 INFO L226 Difference]: Without dead ends: 695 [2021-06-12 20:08:26,013 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:08:26,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2021-06-12 20:08:26,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 441. [2021-06-12 20:08:26,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 3.118181818181818) internal successors, (1372), 440 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:26,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1372 transitions. [2021-06-12 20:08:26,019 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1372 transitions. Word has length 21 [2021-06-12 20:08:26,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:26,019 INFO L482 AbstractCegarLoop]: Abstraction has 441 states and 1372 transitions. [2021-06-12 20:08:26,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:26,019 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1372 transitions. [2021-06-12 20:08:26,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:26,019 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:26,019 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:26,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5966,1024 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:26,220 INFO L430 AbstractCegarLoop]: === Iteration 1036 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:26,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:26,220 INFO L82 PathProgramCache]: Analyzing trace with hash -195880187, now seen corresponding path program 1024 times [2021-06-12 20:08:26,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:26,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182301072] [2021-06-12 20:08:26,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:26,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:26,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182301072] [2021-06-12 20:08:26,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182301072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:26,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094874730] [2021-06-12 20:08:26,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1025 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1025 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:26,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:08:26,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:26,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:26,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:26,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:26,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:26,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:26,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:26,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-06-12 20:08:26,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:08:26,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:26,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:08:26,369 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:26,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:26,377 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:26,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:26,378 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-06-12 20:08:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:26,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094874730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:26,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:26,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:08:26,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896260906] [2021-06-12 20:08:26,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:08:26,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:26,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:08:26,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:08:26,411 INFO L87 Difference]: Start difference. First operand 441 states and 1372 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:26,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:26,576 INFO L93 Difference]: Finished difference Result 638 states and 1944 transitions. [2021-06-12 20:08:26,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:26,576 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:26,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:26,577 INFO L225 Difference]: With dead ends: 638 [2021-06-12 20:08:26,577 INFO L226 Difference]: Without dead ends: 591 [2021-06-12 20:08:26,577 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 122.8ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:26,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-12 20:08:26,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 449. [2021-06-12 20:08:26,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 3.125) internal successors, (1400), 448 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:26,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1400 transitions. [2021-06-12 20:08:26,582 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1400 transitions. Word has length 21 [2021-06-12 20:08:26,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:26,582 INFO L482 AbstractCegarLoop]: Abstraction has 449 states and 1400 transitions. [2021-06-12 20:08:26,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:26,582 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1400 transitions. [2021-06-12 20:08:26,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:26,582 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:26,582 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:26,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1025 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5969 [2021-06-12 20:08:26,783 INFO L430 AbstractCegarLoop]: === Iteration 1037 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:26,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:26,783 INFO L82 PathProgramCache]: Analyzing trace with hash 101386223, now seen corresponding path program 1025 times [2021-06-12 20:08:26,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:26,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296653349] [2021-06-12 20:08:26,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:26,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:26,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:26,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:26,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296653349] [2021-06-12 20:08:26,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296653349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:26,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583197676] [2021-06-12 20:08:26,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1026 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1026 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:26,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:08:26,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:26,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:08:26,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:26,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:26,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:26,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:26,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:26,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:26,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:08:26,954 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:51, output treesize:27 [2021-06-12 20:08:27,008 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_302, v_prenex_303], 1=[o_0, o_4]} [2021-06-12 20:08:27,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:27,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:27,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:27,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:27,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:27,054 INFO L518 ElimStorePlain]: Eliminatee v_prenex_303 vanished before elimination [2021-06-12 20:08:27,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:27,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:27,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:27,058 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:27,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:27,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:27,061 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:27,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:27,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:27,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:27,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:08:27,099 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:27,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:27,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:08:27,102 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:27,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:27,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:08:27,136 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:121, output treesize:57 [2021-06-12 20:08:27,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:27,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583197676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:27,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:27,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:08:27,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977220190] [2021-06-12 20:08:27,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:08:27,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:27,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:08:27,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:08:27,252 INFO L87 Difference]: Start difference. First operand 449 states and 1400 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:28,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:28,307 INFO L93 Difference]: Finished difference Result 998 states and 3030 transitions. [2021-06-12 20:08:28,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:08:28,307 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:28,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:28,309 INFO L225 Difference]: With dead ends: 998 [2021-06-12 20:08:28,309 INFO L226 Difference]: Without dead ends: 956 [2021-06-12 20:08:28,309 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 905.3ms TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:08:28,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-06-12 20:08:28,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 474. [2021-06-12 20:08:28,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.1479915433403804) internal successors, (1489), 473 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:28,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1489 transitions. [2021-06-12 20:08:28,315 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1489 transitions. Word has length 21 [2021-06-12 20:08:28,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:28,315 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1489 transitions. [2021-06-12 20:08:28,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:28,315 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1489 transitions. [2021-06-12 20:08:28,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:28,316 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:28,316 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:28,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5972,1026 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:28,516 INFO L430 AbstractCegarLoop]: === Iteration 1038 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:28,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:28,517 INFO L82 PathProgramCache]: Analyzing trace with hash -182876461, now seen corresponding path program 1026 times [2021-06-12 20:08:28,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:28,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54357382] [2021-06-12 20:08:28,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:28,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:28,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:28,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54357382] [2021-06-12 20:08:28,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54357382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:28,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79478461] [2021-06-12 20:08:28,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1027 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1027 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:28,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:08:28,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:28,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:28,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:28,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:28,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:28,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:28,657 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:28,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:28,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:28,664 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:08:28,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:28,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:28,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:28,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:28,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:28,711 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:28,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:28,711 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:19 [2021-06-12 20:08:28,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:28,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79478461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:28,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:28,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:08:28,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922211933] [2021-06-12 20:08:28,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:08:28,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:28,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:08:28,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:28,783 INFO L87 Difference]: Start difference. First operand 474 states and 1489 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:29,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:29,325 INFO L93 Difference]: Finished difference Result 911 states and 2754 transitions. [2021-06-12 20:08:29,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:08:29,325 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:29,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:29,326 INFO L225 Difference]: With dead ends: 911 [2021-06-12 20:08:29,326 INFO L226 Difference]: Without dead ends: 884 [2021-06-12 20:08:29,326 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 405.0ms TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:08:29,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-06-12 20:08:29,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 499. [2021-06-12 20:08:29,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 3.1666666666666665) internal successors, (1577), 498 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:29,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1577 transitions. [2021-06-12 20:08:29,332 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1577 transitions. Word has length 21 [2021-06-12 20:08:29,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:29,332 INFO L482 AbstractCegarLoop]: Abstraction has 499 states and 1577 transitions. [2021-06-12 20:08:29,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:29,332 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1577 transitions. [2021-06-12 20:08:29,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:29,333 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:29,333 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:29,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1027 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5981 [2021-06-12 20:08:29,534 INFO L430 AbstractCegarLoop]: === Iteration 1039 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:29,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:29,534 INFO L82 PathProgramCache]: Analyzing trace with hash -2143623427, now seen corresponding path program 1027 times [2021-06-12 20:08:29,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:29,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747862504] [2021-06-12 20:08:29,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:29,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:29,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747862504] [2021-06-12 20:08:29,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747862504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:29,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732964785] [2021-06-12 20:08:29,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1028 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1028 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:29,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:29,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:29,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:29,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:29,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:29,675 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:29,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:29,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:08:29,688 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:51, output treesize:27 [2021-06-12 20:08:29,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:29,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:29,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:29,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:29,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:29,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:08:29,765 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:29,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:29,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:29,771 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:10 [2021-06-12 20:08:29,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:29,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732964785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:29,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:29,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:08:29,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248728346] [2021-06-12 20:08:29,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:29,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:29,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:29,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:29,787 INFO L87 Difference]: Start difference. First operand 499 states and 1577 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:29,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:29,980 INFO L93 Difference]: Finished difference Result 831 states and 2540 transitions. [2021-06-12 20:08:29,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:29,980 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:29,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:29,982 INFO L225 Difference]: With dead ends: 831 [2021-06-12 20:08:29,982 INFO L226 Difference]: Without dead ends: 812 [2021-06-12 20:08:29,982 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 157.3ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:29,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-06-12 20:08:29,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 497. [2021-06-12 20:08:29,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.1693548387096775) internal successors, (1572), 496 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:29,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1572 transitions. [2021-06-12 20:08:29,988 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1572 transitions. Word has length 21 [2021-06-12 20:08:29,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:29,988 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1572 transitions. [2021-06-12 20:08:29,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:29,988 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1572 transitions. [2021-06-12 20:08:29,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:29,988 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:29,988 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:30,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1028 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5991 [2021-06-12 20:08:30,189 INFO L430 AbstractCegarLoop]: === Iteration 1040 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:30,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:30,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1598250773, now seen corresponding path program 1028 times [2021-06-12 20:08:30,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:30,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149318246] [2021-06-12 20:08:30,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:30,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:30,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:30,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149318246] [2021-06-12 20:08:30,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149318246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:30,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975642601] [2021-06-12 20:08:30,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1029 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1029 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:30,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:08:30,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:30,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:30,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:30,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:30,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:30,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:30,321 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:30,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:30,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:30,328 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:08:30,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:30,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:30,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:30,396 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:30,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:30,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:08:30,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:30,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975642601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:30,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:30,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:08:30,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841479041] [2021-06-12 20:08:30,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:30,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:30,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:30,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:30,407 INFO L87 Difference]: Start difference. First operand 497 states and 1572 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:30,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:30,593 INFO L93 Difference]: Finished difference Result 786 states and 2383 transitions. [2021-06-12 20:08:30,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:30,593 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:30,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:30,594 INFO L225 Difference]: With dead ends: 786 [2021-06-12 20:08:30,594 INFO L226 Difference]: Without dead ends: 765 [2021-06-12 20:08:30,595 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 138.8ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:30,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-06-12 20:08:30,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 493. [2021-06-12 20:08:30,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.1686991869918697) internal successors, (1559), 492 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:30,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1559 transitions. [2021-06-12 20:08:30,600 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1559 transitions. Word has length 21 [2021-06-12 20:08:30,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:30,600 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1559 transitions. [2021-06-12 20:08:30,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:30,600 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1559 transitions. [2021-06-12 20:08:30,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:30,601 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:30,601 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:30,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5995,1029 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:30,802 INFO L430 AbstractCegarLoop]: === Iteration 1041 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:30,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:30,802 INFO L82 PathProgramCache]: Analyzing trace with hash -658534101, now seen corresponding path program 1029 times [2021-06-12 20:08:30,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:30,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785346167] [2021-06-12 20:08:30,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:30,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:30,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:30,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785346167] [2021-06-12 20:08:30,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785346167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:30,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856669234] [2021-06-12 20:08:30,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1030 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1030 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:30,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:08:30,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:30,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:30,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:30,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:30,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:30,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:30,948 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:30,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:30,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:08:30,961 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:51, output treesize:27 [2021-06-12 20:08:31,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:31,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:31,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:31,010 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:31,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:31,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:08:31,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:31,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856669234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:31,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:31,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:08:31,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609144388] [2021-06-12 20:08:31,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:08:31,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:31,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:08:31,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:31,054 INFO L87 Difference]: Start difference. First operand 493 states and 1559 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:31,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:31,477 INFO L93 Difference]: Finished difference Result 988 states and 2997 transitions. [2021-06-12 20:08:31,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:08:31,478 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:31,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:31,479 INFO L225 Difference]: With dead ends: 988 [2021-06-12 20:08:31,479 INFO L226 Difference]: Without dead ends: 969 [2021-06-12 20:08:31,479 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 292.1ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:08:31,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-06-12 20:08:31,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 471. [2021-06-12 20:08:31,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.151063829787234) internal successors, (1481), 470 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:31,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1481 transitions. [2021-06-12 20:08:31,486 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1481 transitions. Word has length 21 [2021-06-12 20:08:31,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:31,486 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1481 transitions. [2021-06-12 20:08:31,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:31,486 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1481 transitions. [2021-06-12 20:08:31,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:31,487 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:31,487 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:31,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6001,1030 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:31,687 INFO L430 AbstractCegarLoop]: === Iteration 1042 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:31,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:31,687 INFO L82 PathProgramCache]: Analyzing trace with hash 78962131, now seen corresponding path program 1030 times [2021-06-12 20:08:31,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:31,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020818427] [2021-06-12 20:08:31,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:31,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:31,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020818427] [2021-06-12 20:08:31,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020818427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:31,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895515998] [2021-06-12 20:08:31,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1031 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1031 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:31,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:08:31,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:31,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:31,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:31,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:31,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:31,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:31,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:31,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:31,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:31,807 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:08:31,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:31,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:31,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:31,843 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:31,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:31,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:08:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:31,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895515998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:31,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:31,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:08:31,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76283754] [2021-06-12 20:08:31,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:08:31,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:31,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:08:31,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:08:31,854 INFO L87 Difference]: Start difference. First operand 471 states and 1481 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:31,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:31,988 INFO L93 Difference]: Finished difference Result 731 states and 2203 transitions. [2021-06-12 20:08:31,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:31,988 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:31,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:31,989 INFO L225 Difference]: With dead ends: 731 [2021-06-12 20:08:31,989 INFO L226 Difference]: Without dead ends: 710 [2021-06-12 20:08:31,989 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:31,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-06-12 20:08:31,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 439. [2021-06-12 20:08:31,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 3.1141552511415527) internal successors, (1364), 438 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:31,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1364 transitions. [2021-06-12 20:08:31,995 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1364 transitions. Word has length 21 [2021-06-12 20:08:31,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:31,995 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1364 transitions. [2021-06-12 20:08:31,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:31,995 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1364 transitions. [2021-06-12 20:08:31,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:31,995 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:31,995 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:32,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6005,1031 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:32,196 INFO L430 AbstractCegarLoop]: === Iteration 1043 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:32,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:32,196 INFO L82 PathProgramCache]: Analyzing trace with hash 2076346317, now seen corresponding path program 1031 times [2021-06-12 20:08:32,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:32,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330887793] [2021-06-12 20:08:32,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:32,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:32,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330887793] [2021-06-12 20:08:32,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330887793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:32,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788960365] [2021-06-12 20:08:32,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1032 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1032 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:32,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:08:32,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:32,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:32,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:32,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:32,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:32,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:32,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:32,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:32,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:32,353 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:08:32,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:32,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:32,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:32,394 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:08:32,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:32,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:08:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:32,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788960365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:32,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:32,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:08:32,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94813300] [2021-06-12 20:08:32,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:32,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:32,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:32,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:32,408 INFO L87 Difference]: Start difference. First operand 439 states and 1364 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:32,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:32,567 INFO L93 Difference]: Finished difference Result 541 states and 1663 transitions. [2021-06-12 20:08:32,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:32,567 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:32,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:32,568 INFO L225 Difference]: With dead ends: 541 [2021-06-12 20:08:32,568 INFO L226 Difference]: Without dead ends: 519 [2021-06-12 20:08:32,568 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:32,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-12 20:08:32,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 451. [2021-06-12 20:08:32,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 3.117777777777778) internal successors, (1403), 450 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1403 transitions. [2021-06-12 20:08:32,573 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1403 transitions. Word has length 21 [2021-06-12 20:08:32,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:32,573 INFO L482 AbstractCegarLoop]: Abstraction has 451 states and 1403 transitions. [2021-06-12 20:08:32,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:32,573 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1403 transitions. [2021-06-12 20:08:32,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:32,573 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:32,573 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:32,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6011,1032 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:32,774 INFO L430 AbstractCegarLoop]: === Iteration 1044 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:32,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:32,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1593296861, now seen corresponding path program 1032 times [2021-06-12 20:08:32,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:32,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934493386] [2021-06-12 20:08:32,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:32,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:32,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934493386] [2021-06-12 20:08:32,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934493386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:32,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779244979] [2021-06-12 20:08:32,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1033 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1033 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:32,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:08:32,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:32,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:32,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:32,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:32,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:32,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:32,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:32,931 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 20:08:32,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:08:32,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:32,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:32,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:32,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:32,992 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:08:32,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:32,993 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:08:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:33,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779244979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:33,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:33,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:08:33,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333093320] [2021-06-12 20:08:33,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:08:33,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:33,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:08:33,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:33,038 INFO L87 Difference]: Start difference. First operand 451 states and 1403 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:33,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:33,415 INFO L93 Difference]: Finished difference Result 655 states and 2004 transitions. [2021-06-12 20:08:33,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:08:33,415 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:33,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:33,416 INFO L225 Difference]: With dead ends: 655 [2021-06-12 20:08:33,416 INFO L226 Difference]: Without dead ends: 628 [2021-06-12 20:08:33,416 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 272.5ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:08:33,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-06-12 20:08:33,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 451. [2021-06-12 20:08:33,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 3.1133333333333333) internal successors, (1401), 450 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:33,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1401 transitions. [2021-06-12 20:08:33,421 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1401 transitions. Word has length 21 [2021-06-12 20:08:33,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:33,421 INFO L482 AbstractCegarLoop]: Abstraction has 451 states and 1401 transitions. [2021-06-12 20:08:33,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:33,421 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1401 transitions. [2021-06-12 20:08:33,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:33,422 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:33,422 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:33,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1033 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6014 [2021-06-12 20:08:33,622 INFO L430 AbstractCegarLoop]: === Iteration 1045 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:33,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:33,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1877559545, now seen corresponding path program 1033 times [2021-06-12 20:08:33,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:33,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255009620] [2021-06-12 20:08:33,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:33,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:33,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:33,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255009620] [2021-06-12 20:08:33,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255009620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:33,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827632757] [2021-06-12 20:08:33,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1034 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1034 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:33,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:33,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:33,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:33,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:33,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:33,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:33,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:33,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:33,788 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:08:33,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:33,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:33,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:33,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:33,846 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:33,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:33,852 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:08:33,852 INFO L518 ElimStorePlain]: Eliminatee v_prenex_304 vanished before elimination [2021-06-12 20:08:33,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:33,853 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:13 [2021-06-12 20:08:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:33,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827632757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:33,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:33,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:08:33,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307406223] [2021-06-12 20:08:33,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:08:33,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:33,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:08:33,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:33,902 INFO L87 Difference]: Start difference. First operand 451 states and 1401 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:34,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:34,328 INFO L93 Difference]: Finished difference Result 772 states and 2358 transitions. [2021-06-12 20:08:34,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:08:34,329 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:34,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:34,330 INFO L225 Difference]: With dead ends: 772 [2021-06-12 20:08:34,330 INFO L226 Difference]: Without dead ends: 745 [2021-06-12 20:08:34,330 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 345.5ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:08:34,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-06-12 20:08:34,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 467. [2021-06-12 20:08:34,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.11587982832618) internal successors, (1452), 466 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:34,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1452 transitions. [2021-06-12 20:08:34,335 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1452 transitions. Word has length 21 [2021-06-12 20:08:34,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:34,335 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1452 transitions. [2021-06-12 20:08:34,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:34,336 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1452 transitions. [2021-06-12 20:08:34,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:34,336 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:34,336 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:34,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6017,1034 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:34,537 INFO L430 AbstractCegarLoop]: === Iteration 1046 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:34,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:34,537 INFO L82 PathProgramCache]: Analyzing trace with hash -191167705, now seen corresponding path program 1034 times [2021-06-12 20:08:34,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:34,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423989954] [2021-06-12 20:08:34,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:34,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:34,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:34,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:34,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423989954] [2021-06-12 20:08:34,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423989954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:34,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739974582] [2021-06-12 20:08:34,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1035 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1035 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:34,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:08:34,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:34,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:34,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:34,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:34,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:34,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:34,695 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:34,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:34,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:34,705 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:08:34,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:34,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:34,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:34,763 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:08:34,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:34,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:08:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:34,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739974582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:34,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:34,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:08:34,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165446656] [2021-06-12 20:08:34,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:08:34,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:34,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:08:34,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:34,793 INFO L87 Difference]: Start difference. First operand 467 states and 1452 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:35,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:35,263 INFO L93 Difference]: Finished difference Result 700 states and 2141 transitions. [2021-06-12 20:08:35,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:08:35,263 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:35,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:35,264 INFO L225 Difference]: With dead ends: 700 [2021-06-12 20:08:35,264 INFO L226 Difference]: Without dead ends: 679 [2021-06-12 20:08:35,264 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 352.2ms TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:08:35,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-06-12 20:08:35,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 468. [2021-06-12 20:08:35,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.1241970021413277) internal successors, (1459), 467 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:35,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1459 transitions. [2021-06-12 20:08:35,269 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1459 transitions. Word has length 21 [2021-06-12 20:08:35,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:35,269 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1459 transitions. [2021-06-12 20:08:35,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:35,269 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1459 transitions. [2021-06-12 20:08:35,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:35,270 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:35,270 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:35,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6028,1035 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:35,470 INFO L430 AbstractCegarLoop]: === Iteration 1047 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:35,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:35,471 INFO L82 PathProgramCache]: Analyzing trace with hash -168663333, now seen corresponding path program 1035 times [2021-06-12 20:08:35,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:35,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015208658] [2021-06-12 20:08:35,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:35,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:35,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:35,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015208658] [2021-06-12 20:08:35,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015208658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:35,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159919262] [2021-06-12 20:08:35,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1036 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1036 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:35,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:08:35,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:35,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:35,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:35,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:35,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:35,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:35,615 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:35,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:35,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:35,624 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:08:35,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:35,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:35,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:35,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:35,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:35,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:35,671 INFO L518 ElimStorePlain]: Eliminatee v_prenex_307 vanished before elimination [2021-06-12 20:08:35,671 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:08:35,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:35,672 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:21 [2021-06-12 20:08:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:35,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159919262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:35,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:35,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:08:35,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116831954] [2021-06-12 20:08:35,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:35,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:35,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:35,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:35,715 INFO L87 Difference]: Start difference. First operand 468 states and 1459 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:35,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:35,917 INFO L93 Difference]: Finished difference Result 605 states and 1866 transitions. [2021-06-12 20:08:35,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:35,918 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:35,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:35,918 INFO L225 Difference]: With dead ends: 605 [2021-06-12 20:08:35,919 INFO L226 Difference]: Without dead ends: 576 [2021-06-12 20:08:35,919 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 149.1ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:35,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-12 20:08:35,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 468. [2021-06-12 20:08:35,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.1241970021413277) internal successors, (1459), 467 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:35,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1459 transitions. [2021-06-12 20:08:35,924 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1459 transitions. Word has length 21 [2021-06-12 20:08:35,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:35,924 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1459 transitions. [2021-06-12 20:08:35,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:35,924 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1459 transitions. [2021-06-12 20:08:35,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:35,925 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:35,925 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:36,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1036 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6034 [2021-06-12 20:08:36,125 INFO L430 AbstractCegarLoop]: === Iteration 1048 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:36,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:36,125 INFO L82 PathProgramCache]: Analyzing trace with hash 128603077, now seen corresponding path program 1036 times [2021-06-12 20:08:36,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:36,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73789666] [2021-06-12 20:08:36,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:36,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:36,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:36,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73789666] [2021-06-12 20:08:36,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73789666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:36,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709440239] [2021-06-12 20:08:36,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1037 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1037 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:36,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:08:36,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:36,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:36,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:36,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:36,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:36,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:36,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:36,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 20:08:36,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:36,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:36,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:08:36,299 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:36,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:36,307 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:08:36,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:36,308 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:45, output treesize:19 [2021-06-12 20:08:36,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:36,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709440239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:36,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:36,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:08:36,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454670446] [2021-06-12 20:08:36,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:08:36,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:36,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:08:36,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:36,377 INFO L87 Difference]: Start difference. First operand 468 states and 1459 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:36,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:36,875 INFO L93 Difference]: Finished difference Result 680 states and 2083 transitions. [2021-06-12 20:08:36,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:08:36,875 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:36,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:36,876 INFO L225 Difference]: With dead ends: 680 [2021-06-12 20:08:36,876 INFO L226 Difference]: Without dead ends: 657 [2021-06-12 20:08:36,876 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 393.2ms TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:08:36,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-06-12 20:08:36,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 467. [2021-06-12 20:08:36,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.133047210300429) internal successors, (1460), 466 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:36,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1460 transitions. [2021-06-12 20:08:36,881 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1460 transitions. Word has length 21 [2021-06-12 20:08:36,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:36,881 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1460 transitions. [2021-06-12 20:08:36,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:36,881 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1460 transitions. [2021-06-12 20:08:36,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:36,882 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:36,882 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:37,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6039,1037 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:37,082 INFO L430 AbstractCegarLoop]: === Iteration 1049 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:37,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:37,082 INFO L82 PathProgramCache]: Analyzing trace with hash -155659607, now seen corresponding path program 1037 times [2021-06-12 20:08:37,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:37,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664511197] [2021-06-12 20:08:37,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:37,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:37,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:37,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664511197] [2021-06-12 20:08:37,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664511197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:37,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767375995] [2021-06-12 20:08:37,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1038 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1038 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:37,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:08:37,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:37,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:08:37,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:37,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:37,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:37,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:37,245 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:37,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:37,248 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:37,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:37,250 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:37,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:37,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:08:37,277 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:101, output treesize:69 [2021-06-12 20:08:37,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:37,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:37,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:37,356 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:08:37,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:37,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:37,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:37,388 INFO L518 ElimStorePlain]: Eliminatee v_prenex_309 vanished before elimination [2021-06-12 20:08:37,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:37,391 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:37,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:37,424 INFO L518 ElimStorePlain]: Eliminatee v_prenex_311 vanished before elimination [2021-06-12 20:08:37,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:37,426 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:37,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:37,452 INFO L518 ElimStorePlain]: Eliminatee v_prenex_313 vanished before elimination [2021-06-12 20:08:37,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:08:37,452 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:105, output treesize:57 [2021-06-12 20:08:37,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:37,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767375995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:37,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:37,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:08:37,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286361763] [2021-06-12 20:08:37,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:08:37,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:37,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:08:37,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:37,570 INFO L87 Difference]: Start difference. First operand 467 states and 1460 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:38,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:38,348 INFO L93 Difference]: Finished difference Result 874 states and 2647 transitions. [2021-06-12 20:08:38,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:08:38,348 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:38,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:38,349 INFO L225 Difference]: With dead ends: 874 [2021-06-12 20:08:38,349 INFO L226 Difference]: Without dead ends: 826 [2021-06-12 20:08:38,350 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 700.1ms TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:08:38,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-06-12 20:08:38,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 470. [2021-06-12 20:08:38,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.142857142857143) internal successors, (1474), 469 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:38,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1474 transitions. [2021-06-12 20:08:38,355 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1474 transitions. Word has length 21 [2021-06-12 20:08:38,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:38,356 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1474 transitions. [2021-06-12 20:08:38,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:38,356 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1474 transitions. [2021-06-12 20:08:38,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:38,356 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:38,356 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:38,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1038 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6045 [2021-06-12 20:08:38,557 INFO L430 AbstractCegarLoop]: === Iteration 1050 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:38,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:38,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1920030183, now seen corresponding path program 1038 times [2021-06-12 20:08:38,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:38,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394048833] [2021-06-12 20:08:38,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:38,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:38,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:38,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:38,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394048833] [2021-06-12 20:08:38,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394048833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:38,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581782891] [2021-06-12 20:08:38,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1039 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1039 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:38,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:08:38,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:38,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:38,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:38,747 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_314], 1=[o_4]} [2021-06-12 20:08:38,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:38,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:38,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:38,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:38,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:38,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:38,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:38,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:08:38,781 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:55, output treesize:39 [2021-06-12 20:08:38,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:38,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:38,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:38,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:38,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:38,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:08:38,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:38,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:38,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:38,857 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:10 [2021-06-12 20:08:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:38,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581782891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:38,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:38,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:08:38,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219634596] [2021-06-12 20:08:38,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:38,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:38,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:38,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:38,878 INFO L87 Difference]: Start difference. First operand 470 states and 1474 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:39,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:39,105 INFO L93 Difference]: Finished difference Result 603 states and 1852 transitions. [2021-06-12 20:08:39,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:39,105 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:39,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:39,106 INFO L225 Difference]: With dead ends: 603 [2021-06-12 20:08:39,106 INFO L226 Difference]: Without dead ends: 582 [2021-06-12 20:08:39,106 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 247.9ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:39,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-06-12 20:08:39,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 466. [2021-06-12 20:08:39,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.1333333333333333) internal successors, (1457), 465 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:39,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1457 transitions. [2021-06-12 20:08:39,111 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1457 transitions. Word has length 21 [2021-06-12 20:08:39,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:39,111 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1457 transitions. [2021-06-12 20:08:39,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:39,111 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1457 transitions. [2021-06-12 20:08:39,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:39,112 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:39,112 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:39,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6057,1039 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:39,312 INFO L430 AbstractCegarLoop]: === Iteration 1051 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:39,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:39,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1528581611, now seen corresponding path program 1039 times [2021-06-12 20:08:39,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:39,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860486343] [2021-06-12 20:08:39,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:39,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:39,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:39,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860486343] [2021-06-12 20:08:39,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860486343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:39,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816082089] [2021-06-12 20:08:39,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1040 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1040 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:39,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:39,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:39,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:39,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:39,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:39,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:39,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-06-12 20:08:39,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:08:39,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:39,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:08:39,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:39,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:39,481 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:39,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:39,482 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-06-12 20:08:39,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:39,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816082089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:39,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:39,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:08:39,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818020277] [2021-06-12 20:08:39,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:39,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:39,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:39,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:39,516 INFO L87 Difference]: Start difference. First operand 466 states and 1457 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:39,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:39,661 INFO L93 Difference]: Finished difference Result 579 states and 1787 transitions. [2021-06-12 20:08:39,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:39,661 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:39,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:39,662 INFO L225 Difference]: With dead ends: 579 [2021-06-12 20:08:39,662 INFO L226 Difference]: Without dead ends: 543 [2021-06-12 20:08:39,662 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:39,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-12 20:08:39,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 467. [2021-06-12 20:08:39,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.1373390557939915) internal successors, (1462), 466 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:39,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1462 transitions. [2021-06-12 20:08:39,667 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1462 transitions. Word has length 21 [2021-06-12 20:08:39,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:39,667 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1462 transitions. [2021-06-12 20:08:39,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:39,667 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1462 transitions. [2021-06-12 20:08:39,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:39,668 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:39,668 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:39,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6062,1040 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:39,868 INFO L430 AbstractCegarLoop]: === Iteration 1052 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:39,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:39,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1825848021, now seen corresponding path program 1040 times [2021-06-12 20:08:39,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:39,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178588884] [2021-06-12 20:08:39,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:39,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:39,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178588884] [2021-06-12 20:08:39,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178588884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:39,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102315928] [2021-06-12 20:08:39,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1041 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1041 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:39,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:08:39,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:39,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:39,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:40,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:40,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:40,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:40,026 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:40,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:40,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:40,035 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:08:40,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:40,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:40,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:40,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:40,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:40,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:40,083 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:40,083 INFO L518 ElimStorePlain]: Eliminatee v_prenex_315 vanished before elimination [2021-06-12 20:08:40,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:40,084 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:19 [2021-06-12 20:08:40,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:40,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102315928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:40,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:40,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:08:40,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199609927] [2021-06-12 20:08:40,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:08:40,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:40,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:08:40,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:40,155 INFO L87 Difference]: Start difference. First operand 467 states and 1462 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:40,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:40,630 INFO L93 Difference]: Finished difference Result 693 states and 2124 transitions. [2021-06-12 20:08:40,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:08:40,630 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:40,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:40,631 INFO L225 Difference]: With dead ends: 693 [2021-06-12 20:08:40,631 INFO L226 Difference]: Without dead ends: 670 [2021-06-12 20:08:40,631 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 372.2ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:08:40,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-06-12 20:08:40,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 482. [2021-06-12 20:08:40,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.1538461538461537) internal successors, (1517), 481 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:40,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1517 transitions. [2021-06-12 20:08:40,637 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1517 transitions. Word has length 21 [2021-06-12 20:08:40,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:40,637 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1517 transitions. [2021-06-12 20:08:40,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:40,637 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1517 transitions. [2021-06-12 20:08:40,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:40,637 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:40,638 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:40,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1041 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6065 [2021-06-12 20:08:40,838 INFO L430 AbstractCegarLoop]: === Iteration 1053 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:40,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:40,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1541585337, now seen corresponding path program 1041 times [2021-06-12 20:08:40,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:40,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118550054] [2021-06-12 20:08:40,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:40,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:40,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:40,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118550054] [2021-06-12 20:08:40,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118550054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:40,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247250177] [2021-06-12 20:08:40,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1042 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1042 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:40,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:08:40,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:40,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:40,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:40,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:41,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:41,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:41,003 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:41,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:41,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:41,012 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:08:41,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:41,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:41,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:41,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:41,050 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:41,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:41,059 INFO L518 ElimStorePlain]: Eliminatee v_prenex_318 vanished before elimination [2021-06-12 20:08:41,059 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:41,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:41,060 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:19 [2021-06-12 20:08:41,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:41,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247250177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:41,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:41,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:08:41,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217311719] [2021-06-12 20:08:41,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:08:41,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:41,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:08:41,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:41,133 INFO L87 Difference]: Start difference. First operand 482 states and 1517 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:41,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:41,570 INFO L93 Difference]: Finished difference Result 725 states and 2232 transitions. [2021-06-12 20:08:41,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:08:41,570 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:41,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:41,571 INFO L225 Difference]: With dead ends: 725 [2021-06-12 20:08:41,571 INFO L226 Difference]: Without dead ends: 698 [2021-06-12 20:08:41,571 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 314.6ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:08:41,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-06-12 20:08:41,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 488. [2021-06-12 20:08:41,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.1519507186858315) internal successors, (1535), 487 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:41,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1535 transitions. [2021-06-12 20:08:41,581 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1535 transitions. Word has length 21 [2021-06-12 20:08:41,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:41,581 INFO L482 AbstractCegarLoop]: Abstraction has 488 states and 1535 transitions. [2021-06-12 20:08:41,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:41,581 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1535 transitions. [2021-06-12 20:08:41,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:41,582 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:41,582 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:41,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6073,1042 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:41,782 INFO L430 AbstractCegarLoop]: === Iteration 1054 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:41,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:41,782 INFO L82 PathProgramCache]: Analyzing trace with hash -419161629, now seen corresponding path program 1042 times [2021-06-12 20:08:41,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:41,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105893185] [2021-06-12 20:08:41,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:41,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:41,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105893185] [2021-06-12 20:08:41,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105893185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:41,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574564487] [2021-06-12 20:08:41,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1043 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1043 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:41,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:08:41,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:41,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:41,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:41,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:41,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:41,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:41,922 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:41,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:41,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:41,931 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:08:41,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:41,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:41,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:41,968 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:41,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:41,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:08:41,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:41,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574564487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:41,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:41,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:08:41,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258260870] [2021-06-12 20:08:41,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:41,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:41,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:41,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:41,984 INFO L87 Difference]: Start difference. First operand 488 states and 1535 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:42,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:42,155 INFO L93 Difference]: Finished difference Result 585 states and 1805 transitions. [2021-06-12 20:08:42,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:42,156 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:42,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:42,156 INFO L225 Difference]: With dead ends: 585 [2021-06-12 20:08:42,156 INFO L226 Difference]: Without dead ends: 566 [2021-06-12 20:08:42,157 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:42,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-12 20:08:42,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 472. [2021-06-12 20:08:42,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.1443736730360934) internal successors, (1481), 471 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:42,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1481 transitions. [2021-06-12 20:08:42,161 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1481 transitions. Word has length 21 [2021-06-12 20:08:42,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:42,162 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1481 transitions. [2021-06-12 20:08:42,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:42,162 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1481 transitions. [2021-06-12 20:08:42,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:42,162 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:42,162 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:42,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1043 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6084 [2021-06-12 20:08:42,363 INFO L430 AbstractCegarLoop]: === Iteration 1055 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:42,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:42,363 INFO L82 PathProgramCache]: Analyzing trace with hash 126211025, now seen corresponding path program 1043 times [2021-06-12 20:08:42,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:42,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679229484] [2021-06-12 20:08:42,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:42,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:42,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679229484] [2021-06-12 20:08:42,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679229484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:42,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863087229] [2021-06-12 20:08:42,446 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1044 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1044 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:42,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:08:42,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:42,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:42,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:42,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:42,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:42,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:42,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:42,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:42,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:42,518 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:08:42,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:42,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:42,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:42,584 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:42,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:42,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:08:42,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:42,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863087229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:42,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:42,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:08:42,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093174357] [2021-06-12 20:08:42,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:42,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:42,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:42,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:42,595 INFO L87 Difference]: Start difference. First operand 472 states and 1481 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:42,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:42,802 INFO L93 Difference]: Finished difference Result 615 states and 1889 transitions. [2021-06-12 20:08:42,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:42,802 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:42,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:42,803 INFO L225 Difference]: With dead ends: 615 [2021-06-12 20:08:42,803 INFO L226 Difference]: Without dead ends: 594 [2021-06-12 20:08:42,803 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 146.6ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:42,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-12 20:08:42,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 472. [2021-06-12 20:08:42,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.1528662420382165) internal successors, (1485), 471 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:42,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1485 transitions. [2021-06-12 20:08:42,808 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1485 transitions. Word has length 21 [2021-06-12 20:08:42,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:42,808 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1485 transitions. [2021-06-12 20:08:42,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:42,808 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1485 transitions. [2021-06-12 20:08:42,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:42,809 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:42,809 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:43,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6087,1044 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:43,009 INFO L430 AbstractCegarLoop]: === Iteration 1056 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:43,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:43,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1592773657, now seen corresponding path program 1044 times [2021-06-12 20:08:43,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:43,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985508507] [2021-06-12 20:08:43,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:43,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:43,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985508507] [2021-06-12 20:08:43,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985508507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:43,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951830238] [2021-06-12 20:08:43,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1045 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1045 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:43,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:08:43,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:43,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:43,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:43,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:43,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:43,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:43,176 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:43,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:43,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:08:43,192 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:33 [2021-06-12 20:08:43,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:43,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:43,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:43,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:43,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:43,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:08:43,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:43,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:43,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:43,256 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:10 [2021-06-12 20:08:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:43,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951830238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:43,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:43,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:08:43,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267298349] [2021-06-12 20:08:43,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:43,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:43,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:43,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:43,272 INFO L87 Difference]: Start difference. First operand 472 states and 1485 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:43,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:43,419 INFO L93 Difference]: Finished difference Result 615 states and 1889 transitions. [2021-06-12 20:08:43,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:43,420 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:43,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:43,420 INFO L225 Difference]: With dead ends: 615 [2021-06-12 20:08:43,421 INFO L226 Difference]: Without dead ends: 594 [2021-06-12 20:08:43,421 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 139.8ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:43,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-12 20:08:43,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 468. [2021-06-12 20:08:43,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.143468950749465) internal successors, (1468), 467 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:43,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1468 transitions. [2021-06-12 20:08:43,431 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1468 transitions. Word has length 21 [2021-06-12 20:08:43,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:43,431 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1468 transitions. [2021-06-12 20:08:43,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:43,431 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1468 transitions. [2021-06-12 20:08:43,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:43,432 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:43,432 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:43,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6093,1045 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:43,632 INFO L430 AbstractCegarLoop]: === Iteration 1057 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:43,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:43,632 INFO L82 PathProgramCache]: Analyzing trace with hash -196386479, now seen corresponding path program 1045 times [2021-06-12 20:08:43,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:43,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044934328] [2021-06-12 20:08:43,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:43,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:43,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:43,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044934328] [2021-06-12 20:08:43,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044934328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:43,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214285971] [2021-06-12 20:08:43,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1046 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1046 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:43,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:43,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:43,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:43,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:43,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:43,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:43,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:08:43,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:43,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:43,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:43,832 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:08:43,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:43,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:08:43,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:43,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214285971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:43,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:43,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:08:43,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161290486] [2021-06-12 20:08:43,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:08:43,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:43,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:08:43,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:43,861 INFO L87 Difference]: Start difference. First operand 468 states and 1468 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:44,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:44,205 INFO L93 Difference]: Finished difference Result 714 states and 2192 transitions. [2021-06-12 20:08:44,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:08:44,205 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:44,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:44,206 INFO L225 Difference]: With dead ends: 714 [2021-06-12 20:08:44,206 INFO L226 Difference]: Without dead ends: 693 [2021-06-12 20:08:44,206 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 286.5ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:08:44,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-06-12 20:08:44,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 474. [2021-06-12 20:08:44,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.1479915433403804) internal successors, (1489), 473 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:44,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1489 transitions. [2021-06-12 20:08:44,212 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1489 transitions. Word has length 21 [2021-06-12 20:08:44,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:44,212 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1489 transitions. [2021-06-12 20:08:44,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:44,212 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1489 transitions. [2021-06-12 20:08:44,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:44,212 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:44,213 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:44,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1046 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6097 [2021-06-12 20:08:44,413 INFO L430 AbstractCegarLoop]: === Iteration 1058 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:44,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:44,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1526314641, now seen corresponding path program 1046 times [2021-06-12 20:08:44,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:44,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608150394] [2021-06-12 20:08:44,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:44,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:44,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608150394] [2021-06-12 20:08:44,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608150394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:44,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141123427] [2021-06-12 20:08:44,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1047 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1047 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:44,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:08:44,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:44,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:44,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:44,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:44,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:44,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:44,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:44,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:08:44,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 20:08:44,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:44,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:44,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:44,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:44,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:44,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:08:44,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:44,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:44,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:44,674 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:10 [2021-06-12 20:08:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:44,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141123427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:44,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:44,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:08:44,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71256353] [2021-06-12 20:08:44,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:44,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:44,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:44,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:44,695 INFO L87 Difference]: Start difference. First operand 474 states and 1489 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:44,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:44,851 INFO L93 Difference]: Finished difference Result 602 states and 1859 transitions. [2021-06-12 20:08:44,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:44,851 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:44,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:44,852 INFO L225 Difference]: With dead ends: 602 [2021-06-12 20:08:44,852 INFO L226 Difference]: Without dead ends: 581 [2021-06-12 20:08:44,852 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 183.0ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:44,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-06-12 20:08:44,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 471. [2021-06-12 20:08:44,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.1425531914893616) internal successors, (1477), 470 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:44,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1477 transitions. [2021-06-12 20:08:44,857 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1477 transitions. Word has length 21 [2021-06-12 20:08:44,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:44,857 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1477 transitions. [2021-06-12 20:08:44,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:44,857 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1477 transitions. [2021-06-12 20:08:44,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:44,857 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:44,857 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:45,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6099,1047 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:45,058 INFO L430 AbstractCegarLoop]: === Iteration 1059 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:45,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:45,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1853571167, now seen corresponding path program 1047 times [2021-06-12 20:08:45,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:45,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210283700] [2021-06-12 20:08:45,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:45,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:45,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210283700] [2021-06-12 20:08:45,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210283700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:45,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86442409] [2021-06-12 20:08:45,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1048 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1048 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:45,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:08:45,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:45,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:45,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:45,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:45,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:45,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:45,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:08:45,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-06-12 20:08:45,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:45,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:45,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:45,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:45,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:45,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:08:45,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:45,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:45,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:45,279 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:10 [2021-06-12 20:08:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:45,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86442409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:45,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:45,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:08:45,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382194340] [2021-06-12 20:08:45,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:08:45,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:45,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:08:45,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:08:45,330 INFO L87 Difference]: Start difference. First operand 471 states and 1477 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:45,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:45,636 INFO L93 Difference]: Finished difference Result 690 states and 2124 transitions. [2021-06-12 20:08:45,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:08:45,636 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:45,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:45,637 INFO L225 Difference]: With dead ends: 690 [2021-06-12 20:08:45,637 INFO L226 Difference]: Without dead ends: 669 [2021-06-12 20:08:45,637 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 258.9ms TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:08:45,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-06-12 20:08:45,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 467. [2021-06-12 20:08:45,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.1416309012875536) internal successors, (1464), 466 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:45,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1464 transitions. [2021-06-12 20:08:45,642 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1464 transitions. Word has length 21 [2021-06-12 20:08:45,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:45,643 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1464 transitions. [2021-06-12 20:08:45,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:45,643 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1464 transitions. [2021-06-12 20:08:45,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:45,643 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:45,643 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:45,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1048 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6102 [2021-06-12 20:08:45,844 INFO L430 AbstractCegarLoop]: === Iteration 1060 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:45,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:45,844 INFO L82 PathProgramCache]: Analyzing trace with hash 321710461, now seen corresponding path program 1048 times [2021-06-12 20:08:45,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:45,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462194688] [2021-06-12 20:08:45,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:45,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:45,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462194688] [2021-06-12 20:08:45,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462194688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:45,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216136684] [2021-06-12 20:08:45,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1049 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1049 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:45,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:08:45,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:45,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:45,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:45,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:45,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:45,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:45,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:45,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-06-12 20:08:45,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:08:45,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:45,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:08:45,995 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:46,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:46,004 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:46,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:46,004 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-06-12 20:08:46,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:46,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216136684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:46,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:46,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:08:46,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956578303] [2021-06-12 20:08:46,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:08:46,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:46,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:08:46,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:08:46,038 INFO L87 Difference]: Start difference. First operand 467 states and 1464 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:46,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:46,218 INFO L93 Difference]: Finished difference Result 634 states and 1955 transitions. [2021-06-12 20:08:46,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:46,218 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:46,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:46,219 INFO L225 Difference]: With dead ends: 634 [2021-06-12 20:08:46,219 INFO L226 Difference]: Without dead ends: 587 [2021-06-12 20:08:46,219 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 126.6ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:46,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-06-12 20:08:46,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 475. [2021-06-12 20:08:46,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.147679324894515) internal successors, (1492), 474 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:46,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1492 transitions. [2021-06-12 20:08:46,224 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1492 transitions. Word has length 21 [2021-06-12 20:08:46,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:46,224 INFO L482 AbstractCegarLoop]: Abstraction has 475 states and 1492 transitions. [2021-06-12 20:08:46,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:46,224 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1492 transitions. [2021-06-12 20:08:46,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:46,225 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:46,225 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:46,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6104,1049 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:46,426 INFO L430 AbstractCegarLoop]: === Iteration 1061 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:46,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:46,426 INFO L82 PathProgramCache]: Analyzing trace with hash 618976871, now seen corresponding path program 1049 times [2021-06-12 20:08:46,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:46,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317052456] [2021-06-12 20:08:46,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:46,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:46,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317052456] [2021-06-12 20:08:46,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317052456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:46,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28717898] [2021-06-12 20:08:46,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1050 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1050 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:46,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:08:46,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:46,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:08:46,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:46,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:46,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:46,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:46,558 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:46,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:46,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:46,565 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:08:46,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:46,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:46,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:46,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:46,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:46,608 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:46,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:46,611 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:46,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:46,636 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:46,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:08:46,637 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:105, output treesize:57 [2021-06-12 20:08:46,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:46,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28717898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:46,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:46,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:08:46,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215831628] [2021-06-12 20:08:46,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:08:46,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:46,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:08:46,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:46,750 INFO L87 Difference]: Start difference. First operand 475 states and 1492 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:47,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:47,284 INFO L93 Difference]: Finished difference Result 756 states and 2307 transitions. [2021-06-12 20:08:47,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:08:47,285 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:47,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:47,286 INFO L225 Difference]: With dead ends: 756 [2021-06-12 20:08:47,286 INFO L226 Difference]: Without dead ends: 733 [2021-06-12 20:08:47,286 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 495.4ms TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:08:47,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-06-12 20:08:47,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 500. [2021-06-12 20:08:47,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 3.1683366733466936) internal successors, (1581), 499 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:47,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1581 transitions. [2021-06-12 20:08:47,291 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1581 transitions. Word has length 21 [2021-06-12 20:08:47,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:47,292 INFO L482 AbstractCegarLoop]: Abstraction has 500 states and 1581 transitions. [2021-06-12 20:08:47,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:47,292 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1581 transitions. [2021-06-12 20:08:47,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:47,292 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:47,292 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:47,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6107,1050 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:47,493 INFO L430 AbstractCegarLoop]: === Iteration 1062 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:47,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:47,493 INFO L82 PathProgramCache]: Analyzing trace with hash 334714187, now seen corresponding path program 1050 times [2021-06-12 20:08:47,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:47,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535202107] [2021-06-12 20:08:47,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:47,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:47,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:47,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:47,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535202107] [2021-06-12 20:08:47,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535202107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:47,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011635212] [2021-06-12 20:08:47,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1051 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1051 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:47,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:08:47,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:47,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:47,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:47,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:47,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:47,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:47,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:47,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:47,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:47,638 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:08:47,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:47,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:47,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:47,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:47,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:47,686 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:47,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:47,687 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:19 [2021-06-12 20:08:47,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:47,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011635212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:47,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:47,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:08:47,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050070011] [2021-06-12 20:08:47,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:08:47,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:47,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:08:47,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:47,760 INFO L87 Difference]: Start difference. First operand 500 states and 1581 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:48,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:48,181 INFO L93 Difference]: Finished difference Result 872 states and 2679 transitions. [2021-06-12 20:08:48,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:08:48,182 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:48,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:48,183 INFO L225 Difference]: With dead ends: 872 [2021-06-12 20:08:48,183 INFO L226 Difference]: Without dead ends: 845 [2021-06-12 20:08:48,183 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 352.4ms TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:08:48,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-06-12 20:08:48,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 513. [2021-06-12 20:08:48,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 3.177734375) internal successors, (1627), 512 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:48,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1627 transitions. [2021-06-12 20:08:48,189 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1627 transitions. Word has length 21 [2021-06-12 20:08:48,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:48,189 INFO L482 AbstractCegarLoop]: Abstraction has 513 states and 1627 transitions. [2021-06-12 20:08:48,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:48,189 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1627 transitions. [2021-06-12 20:08:48,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:48,190 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:48,190 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:48,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6115,1051 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:48,391 INFO L430 AbstractCegarLoop]: === Iteration 1063 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:48,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:48,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1626032779, now seen corresponding path program 1051 times [2021-06-12 20:08:48,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:48,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649278647] [2021-06-12 20:08:48,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:48,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:48,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:48,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:48,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649278647] [2021-06-12 20:08:48,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649278647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:48,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089450113] [2021-06-12 20:08:48,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1052 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1052 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:48,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:48,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:48,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:48,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:48,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:48,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:48,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:48,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:48,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:48,553 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:08:48,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:48,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:48,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:48,604 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:48,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:48,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:08:48,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:48,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089450113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:48,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:48,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:08:48,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104998838] [2021-06-12 20:08:48,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:48,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:48,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:48,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:48,620 INFO L87 Difference]: Start difference. First operand 513 states and 1627 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:48,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:48,781 INFO L93 Difference]: Finished difference Result 750 states and 2308 transitions. [2021-06-12 20:08:48,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:48,782 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:48,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:48,787 INFO L225 Difference]: With dead ends: 750 [2021-06-12 20:08:48,787 INFO L226 Difference]: Without dead ends: 731 [2021-06-12 20:08:48,787 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 157.2ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:48,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-06-12 20:08:48,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 511. [2021-06-12 20:08:48,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 3.180392156862745) internal successors, (1622), 510 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:48,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1622 transitions. [2021-06-12 20:08:48,793 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1622 transitions. Word has length 21 [2021-06-12 20:08:48,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:48,793 INFO L482 AbstractCegarLoop]: Abstraction has 511 states and 1622 transitions. [2021-06-12 20:08:48,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:48,793 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1622 transitions. [2021-06-12 20:08:48,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:48,794 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:48,794 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:48,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1052 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6125 [2021-06-12 20:08:48,994 INFO L430 AbstractCegarLoop]: === Iteration 1064 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:48,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:48,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1080660125, now seen corresponding path program 1052 times [2021-06-12 20:08:48,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:48,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599067018] [2021-06-12 20:08:48,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:48,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:49,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:49,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:49,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599067018] [2021-06-12 20:08:49,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599067018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:49,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028635593] [2021-06-12 20:08:49,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1053 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1053 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:49,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:08:49,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:49,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:49,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:49,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:49,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:49,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:49,119 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:49,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:49,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:49,126 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:08:49,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:49,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:49,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:49,180 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:49,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:49,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:08:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:49,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028635593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:49,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:49,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:08:49,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113457476] [2021-06-12 20:08:49,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:49,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:49,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:49,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:49,191 INFO L87 Difference]: Start difference. First operand 511 states and 1622 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:49,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:49,356 INFO L93 Difference]: Finished difference Result 771 states and 2368 transitions. [2021-06-12 20:08:49,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:49,356 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:49,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:49,357 INFO L225 Difference]: With dead ends: 771 [2021-06-12 20:08:49,357 INFO L226 Difference]: Without dead ends: 750 [2021-06-12 20:08:49,357 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:49,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-06-12 20:08:49,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 503. [2021-06-12 20:08:49,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 3.1733067729083664) internal successors, (1593), 502 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:49,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1593 transitions. [2021-06-12 20:08:49,363 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1593 transitions. Word has length 21 [2021-06-12 20:08:49,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:49,363 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1593 transitions. [2021-06-12 20:08:49,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:49,363 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1593 transitions. [2021-06-12 20:08:49,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:49,363 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:49,363 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:49,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1053 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6128 [2021-06-12 20:08:49,564 INFO L430 AbstractCegarLoop]: === Iteration 1065 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:49,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:49,564 INFO L82 PathProgramCache]: Analyzing trace with hash -140943453, now seen corresponding path program 1053 times [2021-06-12 20:08:49,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:49,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228524801] [2021-06-12 20:08:49,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:49,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:49,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:49,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:49,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228524801] [2021-06-12 20:08:49,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228524801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:49,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954099769] [2021-06-12 20:08:49,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1054 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1054 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:49,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:08:49,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:49,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:49,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:49,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:49,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:49,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:49,695 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:49,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:49,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:49,702 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:08:49,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:49,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:49,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:49,736 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:49,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:49,736 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:08:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:49,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954099769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:49,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:49,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:08:49,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618072408] [2021-06-12 20:08:49,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:08:49,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:49,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:08:49,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:49,778 INFO L87 Difference]: Start difference. First operand 503 states and 1593 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:50,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:50,173 INFO L93 Difference]: Finished difference Result 822 states and 2511 transitions. [2021-06-12 20:08:50,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:08:50,173 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:50,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:50,175 INFO L225 Difference]: With dead ends: 822 [2021-06-12 20:08:50,175 INFO L226 Difference]: Without dead ends: 803 [2021-06-12 20:08:50,175 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 258.3ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:08:50,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-06-12 20:08:50,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 477. [2021-06-12 20:08:50,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.161764705882353) internal successors, (1505), 476 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:50,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1505 transitions. [2021-06-12 20:08:50,180 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1505 transitions. Word has length 21 [2021-06-12 20:08:50,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:50,180 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1505 transitions. [2021-06-12 20:08:50,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:50,181 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1505 transitions. [2021-06-12 20:08:50,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:50,181 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:50,181 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:50,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1054 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6132 [2021-06-12 20:08:50,382 INFO L430 AbstractCegarLoop]: === Iteration 1066 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:50,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:50,382 INFO L82 PathProgramCache]: Analyzing trace with hash 596552779, now seen corresponding path program 1054 times [2021-06-12 20:08:50,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:50,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782242687] [2021-06-12 20:08:50,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:50,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:50,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:50,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:50,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782242687] [2021-06-12 20:08:50,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782242687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:50,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449822643] [2021-06-12 20:08:50,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1055 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1055 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:50,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:08:50,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:50,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:50,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:50,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:50,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:50,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:50,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:50,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:50,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:50,510 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:08:50,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:50,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:50,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:50,534 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:50,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:50,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:08:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:50,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449822643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:50,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:50,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:08:50,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728877597] [2021-06-12 20:08:50,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:08:50,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:50,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:08:50,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:08:50,545 INFO L87 Difference]: Start difference. First operand 477 states and 1505 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:50,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:50,691 INFO L93 Difference]: Finished difference Result 843 states and 2558 transitions. [2021-06-12 20:08:50,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:50,691 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:50,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:50,692 INFO L225 Difference]: With dead ends: 843 [2021-06-12 20:08:50,692 INFO L226 Difference]: Without dead ends: 822 [2021-06-12 20:08:50,692 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:50,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-06-12 20:08:50,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 470. [2021-06-12 20:08:50,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.159914712153518) internal successors, (1482), 469 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:50,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1482 transitions. [2021-06-12 20:08:50,698 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1482 transitions. Word has length 21 [2021-06-12 20:08:50,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:50,698 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1482 transitions. [2021-06-12 20:08:50,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:50,699 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1482 transitions. [2021-06-12 20:08:50,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:50,699 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:50,699 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:50,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1055 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6135 [2021-06-12 20:08:50,900 INFO L430 AbstractCegarLoop]: === Iteration 1067 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:50,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:50,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1940750485, now seen corresponding path program 1055 times [2021-06-12 20:08:50,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:50,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393570082] [2021-06-12 20:08:50,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:50,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:50,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393570082] [2021-06-12 20:08:50,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393570082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:50,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770443355] [2021-06-12 20:08:50,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1056 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1056 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:51,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:08:51,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:51,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:08:51,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:51,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:51,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:51,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:51,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:51,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:51,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:51,089 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:57, output treesize:43 [2021-06-12 20:08:51,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:51,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:51,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 20:08:51,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:51,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:51,156 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:08:51,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:51,156 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:21 [2021-06-12 20:08:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:51,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770443355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:51,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:51,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:08:51,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592930901] [2021-06-12 20:08:51,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:08:51,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:51,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:08:51,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:51,205 INFO L87 Difference]: Start difference. First operand 470 states and 1482 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:51,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:51,631 INFO L93 Difference]: Finished difference Result 723 states and 2240 transitions. [2021-06-12 20:08:51,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:08:51,632 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:51,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:51,633 INFO L225 Difference]: With dead ends: 723 [2021-06-12 20:08:51,633 INFO L226 Difference]: Without dead ends: 702 [2021-06-12 20:08:51,633 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 390.1ms TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:08:51,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-06-12 20:08:51,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 476. [2021-06-12 20:08:51,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.1515789473684213) internal successors, (1497), 475 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:51,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1497 transitions. [2021-06-12 20:08:51,638 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1497 transitions. Word has length 21 [2021-06-12 20:08:51,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:51,638 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1497 transitions. [2021-06-12 20:08:51,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:51,638 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1497 transitions. [2021-06-12 20:08:51,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:51,639 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:51,639 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:51,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6139,1056 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:51,839 INFO L430 AbstractCegarLoop]: === Iteration 1068 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:51,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:51,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1024288649, now seen corresponding path program 1056 times [2021-06-12 20:08:51,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:51,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794510798] [2021-06-12 20:08:51,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:51,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:51,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794510798] [2021-06-12 20:08:51,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794510798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:51,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162002277] [2021-06-12 20:08:51,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1057 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1057 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:51,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:08:51,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:51,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:51,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:52,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:52,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:52,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:52,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:52,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:08:52,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:52,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:52,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:52,039 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:08:52,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:52,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:08:52,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:52,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162002277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:52,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:52,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:08:52,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412783033] [2021-06-12 20:08:52,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:08:52,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:52,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:08:52,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:52,083 INFO L87 Difference]: Start difference. First operand 476 states and 1497 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:52,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:52,490 INFO L93 Difference]: Finished difference Result 717 states and 2208 transitions. [2021-06-12 20:08:52,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:08:52,491 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:52,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:52,492 INFO L225 Difference]: With dead ends: 717 [2021-06-12 20:08:52,492 INFO L226 Difference]: Without dead ends: 696 [2021-06-12 20:08:52,492 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 316.5ms TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:08:52,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-06-12 20:08:52,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 473. [2021-06-12 20:08:52,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.1461864406779663) internal successors, (1485), 472 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:52,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1485 transitions. [2021-06-12 20:08:52,498 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1485 transitions. Word has length 21 [2021-06-12 20:08:52,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:52,498 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1485 transitions. [2021-06-12 20:08:52,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:52,498 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1485 transitions. [2021-06-12 20:08:52,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:52,498 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:52,499 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:52,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6147,1057 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:52,699 INFO L430 AbstractCegarLoop]: === Iteration 1069 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:52,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:52,699 INFO L82 PathProgramCache]: Analyzing trace with hash 109207161, now seen corresponding path program 1057 times [2021-06-12 20:08:52,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:52,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646384168] [2021-06-12 20:08:52,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:52,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:52,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:52,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646384168] [2021-06-12 20:08:52,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646384168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:52,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77914409] [2021-06-12 20:08:52,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1058 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1058 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:52,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:52,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:52,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:52,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:52,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:52,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:52,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:08:52,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:52,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:52,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:52,878 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:52,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:52,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:08:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:52,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77914409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:52,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:52,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:08:52,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949855831] [2021-06-12 20:08:52,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:08:52,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:52,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:08:52,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:52,920 INFO L87 Difference]: Start difference. First operand 473 states and 1485 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:53,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:53,240 INFO L93 Difference]: Finished difference Result 695 states and 2139 transitions. [2021-06-12 20:08:53,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:08:53,240 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:53,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:53,241 INFO L225 Difference]: With dead ends: 695 [2021-06-12 20:08:53,241 INFO L226 Difference]: Without dead ends: 674 [2021-06-12 20:08:53,242 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 228.9ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:08:53,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-06-12 20:08:53,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 470. [2021-06-12 20:08:53,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.1471215351812365) internal successors, (1476), 469 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:53,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1476 transitions. [2021-06-12 20:08:53,247 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1476 transitions. Word has length 21 [2021-06-12 20:08:53,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:53,247 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1476 transitions. [2021-06-12 20:08:53,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:53,247 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1476 transitions. [2021-06-12 20:08:53,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:53,248 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:53,248 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:53,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1058 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6150 [2021-06-12 20:08:53,448 INFO L430 AbstractCegarLoop]: === Iteration 1070 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:53,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:53,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1594296487, now seen corresponding path program 1058 times [2021-06-12 20:08:53,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:53,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342549252] [2021-06-12 20:08:53,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:53,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:53,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:53,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342549252] [2021-06-12 20:08:53,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342549252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:53,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840465203] [2021-06-12 20:08:53,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1059 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1059 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:53,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:08:53,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:53,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:53,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:53,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:53,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:53,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:53,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:53,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 20:08:53,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:53,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:53,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:53,599 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:53,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:53,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:08:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:53,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840465203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:53,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:53,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:08:53,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709393848] [2021-06-12 20:08:53,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:53,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:53,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:53,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:53,640 INFO L87 Difference]: Start difference. First operand 470 states and 1476 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:53,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:53,936 INFO L93 Difference]: Finished difference Result 784 states and 2376 transitions. [2021-06-12 20:08:53,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:08:53,937 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:53,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:53,938 INFO L225 Difference]: With dead ends: 784 [2021-06-12 20:08:53,938 INFO L226 Difference]: Without dead ends: 763 [2021-06-12 20:08:53,938 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 200.1ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:08:53,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-06-12 20:08:53,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 437. [2021-06-12 20:08:53,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 3.114678899082569) internal successors, (1358), 436 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1358 transitions. [2021-06-12 20:08:53,943 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1358 transitions. Word has length 21 [2021-06-12 20:08:53,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:53,943 INFO L482 AbstractCegarLoop]: Abstraction has 437 states and 1358 transitions. [2021-06-12 20:08:53,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:53,943 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1358 transitions. [2021-06-12 20:08:53,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:53,944 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:53,944 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:54,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6152,1059 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:54,144 INFO L430 AbstractCegarLoop]: === Iteration 1071 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:54,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:54,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1643782331, now seen corresponding path program 1059 times [2021-06-12 20:08:54,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:54,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933262152] [2021-06-12 20:08:54,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:54,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:54,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:54,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933262152] [2021-06-12 20:08:54,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933262152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:54,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641591753] [2021-06-12 20:08:54,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1060 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1060 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:54,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:08:54,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:54,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:54,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:54,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:54,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:54,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:54,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:54,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:54,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:54,260 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:08:54,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:54,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:54,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:54,282 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:08:54,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:54,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:08:54,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:54,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641591753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:54,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:54,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:08:54,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333060443] [2021-06-12 20:08:54,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:08:54,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:54,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:08:54,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:08:54,297 INFO L87 Difference]: Start difference. First operand 437 states and 1358 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:54,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:54,455 INFO L93 Difference]: Finished difference Result 834 states and 2478 transitions. [2021-06-12 20:08:54,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:08:54,455 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:54,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:54,456 INFO L225 Difference]: With dead ends: 834 [2021-06-12 20:08:54,456 INFO L226 Difference]: Without dead ends: 812 [2021-06-12 20:08:54,456 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:54,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-06-12 20:08:54,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 441. [2021-06-12 20:08:54,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 3.1136363636363638) internal successors, (1370), 440 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:54,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1370 transitions. [2021-06-12 20:08:54,461 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1370 transitions. Word has length 21 [2021-06-12 20:08:54,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:54,462 INFO L482 AbstractCegarLoop]: Abstraction has 441 states and 1370 transitions. [2021-06-12 20:08:54,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:54,462 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1370 transitions. [2021-06-12 20:08:54,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:54,462 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:54,462 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:54,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1060 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6154 [2021-06-12 20:08:54,663 INFO L430 AbstractCegarLoop]: === Iteration 1072 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:54,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:54,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1364637935, now seen corresponding path program 1060 times [2021-06-12 20:08:54,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:54,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002547211] [2021-06-12 20:08:54,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:54,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:54,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002547211] [2021-06-12 20:08:54,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002547211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:54,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64405512] [2021-06-12 20:08:54,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1061 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1061 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:54,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:08:54,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:54,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:54,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:54,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:54,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:54,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:54,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:54,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-06-12 20:08:54,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:08:54,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:54,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:54,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:54,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:54,835 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:08:54,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:54,835 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:08:54,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:54,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64405512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:54,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:54,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:08:54,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10037756] [2021-06-12 20:08:54,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:08:54,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:54,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:08:54,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:54,881 INFO L87 Difference]: Start difference. First operand 441 states and 1370 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:55,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:55,356 INFO L93 Difference]: Finished difference Result 903 states and 2690 transitions. [2021-06-12 20:08:55,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:08:55,356 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:55,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:55,357 INFO L225 Difference]: With dead ends: 903 [2021-06-12 20:08:55,357 INFO L226 Difference]: Without dead ends: 872 [2021-06-12 20:08:55,357 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 359.4ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:08:55,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-06-12 20:08:55,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 444. [2021-06-12 20:08:55,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 3.110609480812641) internal successors, (1378), 443 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:55,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1378 transitions. [2021-06-12 20:08:55,363 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1378 transitions. Word has length 21 [2021-06-12 20:08:55,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:55,363 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 1378 transitions. [2021-06-12 20:08:55,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:55,363 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1378 transitions. [2021-06-12 20:08:55,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:55,364 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:55,364 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:55,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1061 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6157 [2021-06-12 20:08:55,564 INFO L430 AbstractCegarLoop]: === Iteration 1073 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:55,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:55,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1648900619, now seen corresponding path program 1061 times [2021-06-12 20:08:55,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:55,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677960312] [2021-06-12 20:08:55,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:55,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:55,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677960312] [2021-06-12 20:08:55,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677960312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:55,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711498370] [2021-06-12 20:08:55,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1062 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1062 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:55,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:08:55,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:55,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:08:55,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:55,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:55,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:55,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:55,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:55,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:55,684 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:55,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:55,687 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:55,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:55,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:08:55,708 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:89, output treesize:57 [2021-06-12 20:08:55,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:55,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:55,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 20:08:55,792 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:55,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:55,795 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:55,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:55,806 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:08:55,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:08:55,806 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:69, output treesize:26 [2021-06-12 20:08:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:55,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711498370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:55,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:55,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:08:55,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317683438] [2021-06-12 20:08:55,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:08:55,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:55,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:08:55,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:55,875 INFO L87 Difference]: Start difference. First operand 444 states and 1378 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:57,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:57,462 INFO L93 Difference]: Finished difference Result 1188 states and 3636 transitions. [2021-06-12 20:08:57,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:08:57,462 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:57,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:57,464 INFO L225 Difference]: With dead ends: 1188 [2021-06-12 20:08:57,464 INFO L226 Difference]: Without dead ends: 1134 [2021-06-12 20:08:57,464 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1218.3ms TimeCoverageRelationStatistics Valid=436, Invalid=2014, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:08:57,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2021-06-12 20:08:57,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 470. [2021-06-12 20:08:57,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.14498933901919) internal successors, (1475), 469 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:57,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1475 transitions. [2021-06-12 20:08:57,471 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1475 transitions. Word has length 21 [2021-06-12 20:08:57,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:57,471 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1475 transitions. [2021-06-12 20:08:57,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:57,471 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1475 transitions. [2021-06-12 20:08:57,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:57,472 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:57,472 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:57,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1062 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6160 [2021-06-12 20:08:57,672 INFO L430 AbstractCegarLoop]: === Iteration 1074 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:57,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:57,672 INFO L82 PathProgramCache]: Analyzing trace with hash 37491221, now seen corresponding path program 1062 times [2021-06-12 20:08:57,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:57,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748484531] [2021-06-12 20:08:57,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:57,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:57,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:57,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:57,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748484531] [2021-06-12 20:08:57,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748484531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:57,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342362223] [2021-06-12 20:08:57,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1063 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1063 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:57,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:08:57,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:57,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:57,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:57,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:57,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:57,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:57,793 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:57,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:57,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:57,800 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:08:57,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:57,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:57,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:57,861 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:08:57,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:57,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:08:57,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:57,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342362223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:57,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:57,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:08:57,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557719487] [2021-06-12 20:08:57,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:08:57,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:57,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:08:57,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:57,889 INFO L87 Difference]: Start difference. First operand 470 states and 1475 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:58,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:58,671 INFO L93 Difference]: Finished difference Result 978 states and 2989 transitions. [2021-06-12 20:08:58,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:08:58,671 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:08:58,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:58,672 INFO L225 Difference]: With dead ends: 978 [2021-06-12 20:08:58,672 INFO L226 Difference]: Without dead ends: 957 [2021-06-12 20:08:58,672 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 524.6ms TimeCoverageRelationStatistics Valid=250, Invalid=1156, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:08:58,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2021-06-12 20:08:58,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 465. [2021-06-12 20:08:58,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.1422413793103448) internal successors, (1458), 464 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:58,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1458 transitions. [2021-06-12 20:08:58,679 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1458 transitions. Word has length 21 [2021-06-12 20:08:58,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:58,679 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1458 transitions. [2021-06-12 20:08:58,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:58,679 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1458 transitions. [2021-06-12 20:08:58,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:08:58,679 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:58,679 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:58,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6170,1063 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:58,880 INFO L430 AbstractCegarLoop]: === Iteration 1075 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:58,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:58,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1077727019, now seen corresponding path program 1063 times [2021-06-12 20:08:58,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:58,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136292721] [2021-06-12 20:08:58,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:58,957 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:58,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:58,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136292721] [2021-06-12 20:08:58,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136292721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:58,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966687496] [2021-06-12 20:08:58,957 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1064 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1064 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:58,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:58,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:59,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:59,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:59,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:59,017 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:59,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:59,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:59,024 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:08:59,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:59,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:59,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:59,085 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:08:59,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:59,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:08:59,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:08:59,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966687496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:59,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:59,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:08:59,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272090313] [2021-06-12 20:08:59,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:08:59,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:59,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:08:59,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:59,114 INFO L87 Difference]: Start difference. First operand 465 states and 1458 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:00,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:00,086 INFO L93 Difference]: Finished difference Result 1097 states and 3339 transitions. [2021-06-12 20:09:00,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:09:00,087 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:00,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:00,088 INFO L225 Difference]: With dead ends: 1097 [2021-06-12 20:09:00,088 INFO L226 Difference]: Without dead ends: 1076 [2021-06-12 20:09:00,088 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 637.5ms TimeCoverageRelationStatistics Valid=356, Invalid=1624, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:09:00,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-06-12 20:09:00,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 463. [2021-06-12 20:09:00,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.145021645021645) internal successors, (1453), 462 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:00,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1453 transitions. [2021-06-12 20:09:00,095 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1453 transitions. Word has length 21 [2021-06-12 20:09:00,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:00,095 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1453 transitions. [2021-06-12 20:09:00,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:00,095 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1453 transitions. [2021-06-12 20:09:00,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:00,095 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:00,095 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:00,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1064 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6176 [2021-06-12 20:09:00,296 INFO L430 AbstractCegarLoop]: === Iteration 1076 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:00,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:00,296 INFO L82 PathProgramCache]: Analyzing trace with hash 483969817, now seen corresponding path program 1064 times [2021-06-12 20:09:00,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:00,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965428422] [2021-06-12 20:09:00,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:00,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:00,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:00,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965428422] [2021-06-12 20:09:00,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965428422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:00,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995794184] [2021-06-12 20:09:00,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1065 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1065 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:00,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:09:00,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:00,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:00,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:00,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:00,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:00,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:00,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:00,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:00,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:00,434 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:09:00,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:00,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:00,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:00,478 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:00,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:00,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:09:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:00,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995794184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:00,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:00,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:09:00,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632270939] [2021-06-12 20:09:00,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:09:00,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:00,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:09:00,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:09:00,493 INFO L87 Difference]: Start difference. First operand 463 states and 1453 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:00,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:00,658 INFO L93 Difference]: Finished difference Result 839 states and 2536 transitions. [2021-06-12 20:09:00,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:09:00,658 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:00,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:00,659 INFO L225 Difference]: With dead ends: 839 [2021-06-12 20:09:00,659 INFO L226 Difference]: Without dead ends: 817 [2021-06-12 20:09:00,659 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:00,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-06-12 20:09:00,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 465. [2021-06-12 20:09:00,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.1422413793103448) internal successors, (1458), 464 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:00,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1458 transitions. [2021-06-12 20:09:00,665 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1458 transitions. Word has length 21 [2021-06-12 20:09:00,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:00,665 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1458 transitions. [2021-06-12 20:09:00,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:00,666 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1458 transitions. [2021-06-12 20:09:00,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:00,666 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:00,666 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:00,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6182,1065 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:00,867 INFO L430 AbstractCegarLoop]: === Iteration 1077 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:00,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:00,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1761039833, now seen corresponding path program 1065 times [2021-06-12 20:09:00,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:00,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559563358] [2021-06-12 20:09:00,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:00,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:00,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:00,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559563358] [2021-06-12 20:09:00,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559563358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:00,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536732957] [2021-06-12 20:09:00,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1066 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1066 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:00,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:09:00,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:00,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:00,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:00,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:00,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:00,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:00,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:00,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:00,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:00,995 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:09:01,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:01,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:01,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:01,021 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:01,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:01,030 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:01,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:01,031 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-06-12 20:09:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:01,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536732957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:01,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:01,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:09:01,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116503940] [2021-06-12 20:09:01,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:09:01,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:01,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:09:01,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:09:01,053 INFO L87 Difference]: Start difference. First operand 465 states and 1458 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:01,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:01,266 INFO L93 Difference]: Finished difference Result 853 states and 2574 transitions. [2021-06-12 20:09:01,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:09:01,267 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:01,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:01,268 INFO L225 Difference]: With dead ends: 853 [2021-06-12 20:09:01,268 INFO L226 Difference]: Without dead ends: 824 [2021-06-12 20:09:01,268 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:09:01,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-06-12 20:09:01,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 458. [2021-06-12 20:09:01,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.1334792122538295) internal successors, (1432), 457 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:01,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1432 transitions. [2021-06-12 20:09:01,274 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1432 transitions. Word has length 21 [2021-06-12 20:09:01,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:01,274 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1432 transitions. [2021-06-12 20:09:01,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:01,274 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1432 transitions. [2021-06-12 20:09:01,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:01,274 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:01,274 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:01,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1066 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6185 [2021-06-12 20:09:01,475 INFO L430 AbstractCegarLoop]: === Iteration 1078 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:01,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:01,475 INFO L82 PathProgramCache]: Analyzing trace with hash -454154905, now seen corresponding path program 1066 times [2021-06-12 20:09:01,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:01,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828829358] [2021-06-12 20:09:01,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:01,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:01,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:01,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828829358] [2021-06-12 20:09:01,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828829358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:01,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656809796] [2021-06-12 20:09:01,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1067 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1067 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:01,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:09:01,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:01,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:01,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:01,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:01,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:01,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:01,609 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:01,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:01,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:01,618 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:09:01,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:01,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:01,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:01,659 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:01,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:01,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:09:01,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:01,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656809796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:01,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:01,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:09:01,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360920269] [2021-06-12 20:09:01,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:09:01,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:01,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:09:01,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:09:01,673 INFO L87 Difference]: Start difference. First operand 458 states and 1432 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:01,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:01,882 INFO L93 Difference]: Finished difference Result 694 states and 2099 transitions. [2021-06-12 20:09:01,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:09:01,882 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:01,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:01,883 INFO L225 Difference]: With dead ends: 694 [2021-06-12 20:09:01,883 INFO L226 Difference]: Without dead ends: 672 [2021-06-12 20:09:01,883 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:01,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-12 20:09:01,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 463. [2021-06-12 20:09:01,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.1363636363636362) internal successors, (1449), 462 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:01,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1449 transitions. [2021-06-12 20:09:01,888 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1449 transitions. Word has length 21 [2021-06-12 20:09:01,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:01,888 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1449 transitions. [2021-06-12 20:09:01,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:01,889 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1449 transitions. [2021-06-12 20:09:01,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:01,889 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:01,889 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:02,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1067 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6189 [2021-06-12 20:09:02,090 INFO L430 AbstractCegarLoop]: === Iteration 1079 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:02,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:02,090 INFO L82 PathProgramCache]: Analyzing trace with hash 171169213, now seen corresponding path program 1067 times [2021-06-12 20:09:02,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:02,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507203507] [2021-06-12 20:09:02,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:02,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:02,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507203507] [2021-06-12 20:09:02,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507203507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:02,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236182123] [2021-06-12 20:09:02,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1068 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1068 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:02,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:09:02,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:02,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:09:02,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:02,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:02,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:02,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:02,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:02,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:02,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:02,254 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-06-12 20:09:02,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-12 20:09:02,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:02,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:09:02,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:02,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 20:09:02,343 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:02,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:02,345 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:02,368 INFO L628 ElimStorePlain]: treesize reduction 8, result has 76.5 percent of original size [2021-06-12 20:09:02,369 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:02,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:09:02,369 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:101, output treesize:26 [2021-06-12 20:09:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:02,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236182123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:02,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:02,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:09:02,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039685065] [2021-06-12 20:09:02,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:09:02,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:02,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:09:02,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:02,441 INFO L87 Difference]: Start difference. First operand 463 states and 1449 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:02,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:02,889 INFO L93 Difference]: Finished difference Result 799 states and 2417 transitions. [2021-06-12 20:09:02,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:09:02,890 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:02,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:02,891 INFO L225 Difference]: With dead ends: 799 [2021-06-12 20:09:02,891 INFO L226 Difference]: Without dead ends: 772 [2021-06-12 20:09:02,891 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 455.7ms TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:09:02,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-06-12 20:09:02,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 463. [2021-06-12 20:09:02,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.132034632034632) internal successors, (1447), 462 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:02,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1447 transitions. [2021-06-12 20:09:02,896 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1447 transitions. Word has length 21 [2021-06-12 20:09:02,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:02,896 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1447 transitions. [2021-06-12 20:09:02,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:02,897 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1447 transitions. [2021-06-12 20:09:02,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:02,897 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:02,897 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:03,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6192,1068 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:03,098 INFO L430 AbstractCegarLoop]: === Iteration 1080 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:03,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:03,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1595802741, now seen corresponding path program 1068 times [2021-06-12 20:09:03,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:03,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370325298] [2021-06-12 20:09:03,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:03,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:03,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:03,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370325298] [2021-06-12 20:09:03,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370325298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:03,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983392929] [2021-06-12 20:09:03,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1069 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1069 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:03,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:09:03,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:03,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:03,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:03,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:03,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:03,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:03,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:03,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:03,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:03,242 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:09:03,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:03,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:03,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:03,278 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:03,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:03,280 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:03,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:03,288 INFO L518 ElimStorePlain]: Eliminatee v_prenex_320 vanished before elimination [2021-06-12 20:09:03,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:03,289 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:21 [2021-06-12 20:09:03,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:03,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983392929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:03,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:03,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:09:03,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550656611] [2021-06-12 20:09:03,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:09:03,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:03,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:09:03,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:09:03,322 INFO L87 Difference]: Start difference. First operand 463 states and 1447 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:03,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:03,517 INFO L93 Difference]: Finished difference Result 739 states and 2231 transitions. [2021-06-12 20:09:03,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:09:03,518 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:03,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:03,519 INFO L225 Difference]: With dead ends: 739 [2021-06-12 20:09:03,519 INFO L226 Difference]: Without dead ends: 710 [2021-06-12 20:09:03,519 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 163.4ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:03,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-06-12 20:09:03,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 464. [2021-06-12 20:09:03,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.138228941684665) internal successors, (1453), 463 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:03,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1453 transitions. [2021-06-12 20:09:03,524 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1453 transitions. Word has length 21 [2021-06-12 20:09:03,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:03,524 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1453 transitions. [2021-06-12 20:09:03,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:03,524 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1453 transitions. [2021-06-12 20:09:03,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:03,524 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:03,525 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:03,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1069 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6202 [2021-06-12 20:09:03,725 INFO L430 AbstractCegarLoop]: === Iteration 1081 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:03,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:03,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1893069151, now seen corresponding path program 1069 times [2021-06-12 20:09:03,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:03,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858383245] [2021-06-12 20:09:03,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:03,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:03,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858383245] [2021-06-12 20:09:03,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858383245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:03,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934244617] [2021-06-12 20:09:03,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1070 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1070 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:03,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:03,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:03,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:03,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:03,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:03,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:03,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:03,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 20:09:03,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:03,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:03,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:09:03,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:03,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:03,904 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:03,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:03,905 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:45, output treesize:19 [2021-06-12 20:09:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:03,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934244617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:03,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:03,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:09:03,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654309771] [2021-06-12 20:09:03,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:09:03,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:03,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:09:03,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:03,973 INFO L87 Difference]: Start difference. First operand 464 states and 1453 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:04,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:04,394 INFO L93 Difference]: Finished difference Result 823 states and 2474 transitions. [2021-06-12 20:09:04,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:09:04,395 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:04,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:04,396 INFO L225 Difference]: With dead ends: 823 [2021-06-12 20:09:04,396 INFO L226 Difference]: Without dead ends: 800 [2021-06-12 20:09:04,396 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 361.5ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:09:04,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-06-12 20:09:04,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 460. [2021-06-12 20:09:04,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.130718954248366) internal successors, (1437), 459 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:04,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1437 transitions. [2021-06-12 20:09:04,402 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1437 transitions. Word has length 21 [2021-06-12 20:09:04,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:04,402 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1437 transitions. [2021-06-12 20:09:04,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:04,402 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1437 transitions. [2021-06-12 20:09:04,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:04,403 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:04,403 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:04,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6207,1070 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:04,603 INFO L430 AbstractCegarLoop]: === Iteration 1082 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:04,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:04,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1001919611, now seen corresponding path program 1070 times [2021-06-12 20:09:04,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:04,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472610132] [2021-06-12 20:09:04,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:04,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:04,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:04,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472610132] [2021-06-12 20:09:04,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472610132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:04,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361501563] [2021-06-12 20:09:04,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1071 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1071 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:04,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:09:04,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:04,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:04,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:04,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:04,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:04,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:04,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:04,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-06-12 20:09:04,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:09:04,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:04,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:09:04,768 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:04,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:04,776 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:04,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:04,777 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-06-12 20:09:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:04,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361501563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:04,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:04,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:09:04,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703993062] [2021-06-12 20:09:04,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:09:04,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:04,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:09:04,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:09:04,810 INFO L87 Difference]: Start difference. First operand 460 states and 1437 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:04,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:04,992 INFO L93 Difference]: Finished difference Result 710 states and 2140 transitions. [2021-06-12 20:09:04,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:09:04,992 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:04,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:04,993 INFO L225 Difference]: With dead ends: 710 [2021-06-12 20:09:04,993 INFO L226 Difference]: Without dead ends: 674 [2021-06-12 20:09:04,993 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:04,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-06-12 20:09:04,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 461. [2021-06-12 20:09:04,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.134782608695652) internal successors, (1442), 460 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:04,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1442 transitions. [2021-06-12 20:09:04,998 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1442 transitions. Word has length 21 [2021-06-12 20:09:04,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:04,999 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1442 transitions. [2021-06-12 20:09:04,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:04,999 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1442 transitions. [2021-06-12 20:09:04,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:04,999 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:04,999 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:05,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1071 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6213 [2021-06-12 20:09:05,200 INFO L430 AbstractCegarLoop]: === Iteration 1083 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:05,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:05,200 INFO L82 PathProgramCache]: Analyzing trace with hash -704653201, now seen corresponding path program 1071 times [2021-06-12 20:09:05,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:05,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791349920] [2021-06-12 20:09:05,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:05,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:05,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:05,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791349920] [2021-06-12 20:09:05,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791349920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:05,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293844716] [2021-06-12 20:09:05,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1072 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1072 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:05,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:09:05,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:05,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:05,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:05,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:05,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:05,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:05,348 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:05,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:05,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:05,358 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:09:05,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:05,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:05,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:05,395 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:05,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:05,397 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:05,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:05,406 INFO L518 ElimStorePlain]: Eliminatee v_prenex_322 vanished before elimination [2021-06-12 20:09:05,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:05,407 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:19 [2021-06-12 20:09:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:05,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293844716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:05,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:05,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:09:05,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599972209] [2021-06-12 20:09:05,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:09:05,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:05,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:09:05,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:05,478 INFO L87 Difference]: Start difference. First operand 461 states and 1442 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:05,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:05,857 INFO L93 Difference]: Finished difference Result 806 states and 2419 transitions. [2021-06-12 20:09:05,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:09:05,858 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:05,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:05,859 INFO L225 Difference]: With dead ends: 806 [2021-06-12 20:09:05,859 INFO L226 Difference]: Without dead ends: 783 [2021-06-12 20:09:05,859 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 331.8ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:09:05,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-06-12 20:09:05,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 476. [2021-06-12 20:09:05,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.1515789473684213) internal successors, (1497), 475 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:05,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1497 transitions. [2021-06-12 20:09:05,865 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1497 transitions. Word has length 21 [2021-06-12 20:09:05,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:05,865 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1497 transitions. [2021-06-12 20:09:05,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:05,865 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1497 transitions. [2021-06-12 20:09:05,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:05,865 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:05,865 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:06,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6216,1072 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:06,066 INFO L430 AbstractCegarLoop]: === Iteration 1084 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:06,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:06,066 INFO L82 PathProgramCache]: Analyzing trace with hash -988915885, now seen corresponding path program 1072 times [2021-06-12 20:09:06,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:06,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886288070] [2021-06-12 20:09:06,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:06,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:06,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:06,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886288070] [2021-06-12 20:09:06,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886288070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:06,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908451914] [2021-06-12 20:09:06,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1073 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1073 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:06,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:09:06,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:06,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:06,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:06,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:06,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:06,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:06,215 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:06,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:06,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:06,224 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:09:06,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:06,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:06,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:06,260 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:06,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:06,262 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:06,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:06,271 INFO L518 ElimStorePlain]: Eliminatee v_prenex_324 vanished before elimination [2021-06-12 20:09:06,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:06,271 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:19 [2021-06-12 20:09:06,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:06,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908451914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:06,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:06,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:09:06,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353786633] [2021-06-12 20:09:06,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:09:06,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:06,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:09:06,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:06,350 INFO L87 Difference]: Start difference. First operand 476 states and 1497 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:06,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:06,645 INFO L93 Difference]: Finished difference Result 747 states and 2298 transitions. [2021-06-12 20:09:06,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:09:06,645 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:06,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:06,646 INFO L225 Difference]: With dead ends: 747 [2021-06-12 20:09:06,646 INFO L226 Difference]: Without dead ends: 720 [2021-06-12 20:09:06,646 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 249.3ms TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:09:06,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-06-12 20:09:06,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 482. [2021-06-12 20:09:06,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.1496881496881497) internal successors, (1515), 481 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:06,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1515 transitions. [2021-06-12 20:09:06,652 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1515 transitions. Word has length 21 [2021-06-12 20:09:06,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:06,652 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1515 transitions. [2021-06-12 20:09:06,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:06,652 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1515 transitions. [2021-06-12 20:09:06,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:06,653 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:06,653 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:06,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6224,1073 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:06,853 INFO L430 AbstractCegarLoop]: === Iteration 1085 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:06,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:06,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1345304445, now seen corresponding path program 1073 times [2021-06-12 20:09:06,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:06,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733798905] [2021-06-12 20:09:06,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:06,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:06,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:06,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733798905] [2021-06-12 20:09:06,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733798905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:06,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490600801] [2021-06-12 20:09:06,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1074 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1074 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:06,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:09:06,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:06,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:09:06,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:06,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:06,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:06,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:06,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:06,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:06,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:06,998 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:09:07,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:07,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:07,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:07,038 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:07,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:07,052 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:07,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:07,053 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:31 [2021-06-12 20:09:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:07,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490600801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:07,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:07,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:09:07,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729132342] [2021-06-12 20:09:07,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:09:07,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:07,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:09:07,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:07,127 INFO L87 Difference]: Start difference. First operand 482 states and 1515 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:07,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:07,410 INFO L93 Difference]: Finished difference Result 716 states and 2158 transitions. [2021-06-12 20:09:07,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:09:07,410 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:07,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:07,411 INFO L225 Difference]: With dead ends: 716 [2021-06-12 20:09:07,411 INFO L226 Difference]: Without dead ends: 697 [2021-06-12 20:09:07,411 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 263.1ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:09:07,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2021-06-12 20:09:07,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 464. [2021-06-12 20:09:07,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.1447084233261338) internal successors, (1456), 463 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:07,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1456 transitions. [2021-06-12 20:09:07,417 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1456 transitions. Word has length 21 [2021-06-12 20:09:07,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:07,417 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1456 transitions. [2021-06-12 20:09:07,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:07,417 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1456 transitions. [2021-06-12 20:09:07,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:07,417 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:07,417 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:07,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1074 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6236 [2021-06-12 20:09:07,618 INFO L430 AbstractCegarLoop]: === Iteration 1086 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:07,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:07,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1890677099, now seen corresponding path program 1074 times [2021-06-12 20:09:07,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:07,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085462800] [2021-06-12 20:09:07,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:07,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:07,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:07,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085462800] [2021-06-12 20:09:07,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085462800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:07,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323965551] [2021-06-12 20:09:07,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1075 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1075 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:07,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:09:07,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:07,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:07,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:07,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:07,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:07,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:07,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:07,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:07,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:07,775 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:09:07,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:07,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:07,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:07,834 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:07,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:07,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:09:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:07,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323965551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:07,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:07,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:09:07,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21730503] [2021-06-12 20:09:07,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:09:07,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:07,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:09:07,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:09:07,844 INFO L87 Difference]: Start difference. First operand 464 states and 1456 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:08,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:08,041 INFO L93 Difference]: Finished difference Result 610 states and 1872 transitions. [2021-06-12 20:09:08,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:09:08,041 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:08,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:08,042 INFO L225 Difference]: With dead ends: 610 [2021-06-12 20:09:08,042 INFO L226 Difference]: Without dead ends: 589 [2021-06-12 20:09:08,042 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 183.5ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:09:08,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-06-12 20:09:08,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 464. [2021-06-12 20:09:08,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.1533477321814254) internal successors, (1460), 463 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:08,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1460 transitions. [2021-06-12 20:09:08,051 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1460 transitions. Word has length 21 [2021-06-12 20:09:08,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:08,051 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1460 transitions. [2021-06-12 20:09:08,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:08,052 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1460 transitions. [2021-06-12 20:09:08,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:08,052 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:08,052 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:08,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1075 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6242 [2021-06-12 20:09:08,253 INFO L430 AbstractCegarLoop]: === Iteration 1087 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:08,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:08,253 INFO L82 PathProgramCache]: Analyzing trace with hash 171692417, now seen corresponding path program 1075 times [2021-06-12 20:09:08,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:08,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143889931] [2021-06-12 20:09:08,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:08,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:08,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:08,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:08,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143889931] [2021-06-12 20:09:08,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143889931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:08,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501385822] [2021-06-12 20:09:08,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1076 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1076 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:08,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:08,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:08,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:08,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:08,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:08,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:08,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:08,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:08,421 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:09:08,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:08,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:08,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:08,459 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:08,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:08,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:09:08,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:08,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501385822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:08,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:08,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:09:08,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674551321] [2021-06-12 20:09:08,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:09:08,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:08,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:09:08,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:09:08,504 INFO L87 Difference]: Start difference. First operand 464 states and 1460 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:08,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:08,871 INFO L93 Difference]: Finished difference Result 711 states and 2183 transitions. [2021-06-12 20:09:08,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:09:08,871 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:08,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:08,872 INFO L225 Difference]: With dead ends: 711 [2021-06-12 20:09:08,872 INFO L226 Difference]: Without dead ends: 690 [2021-06-12 20:09:08,872 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 249.4ms TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:09:08,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-06-12 20:09:08,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 460. [2021-06-12 20:09:08,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.1437908496732025) internal successors, (1443), 459 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:08,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1443 transitions. [2021-06-12 20:09:08,878 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1443 transitions. Word has length 21 [2021-06-12 20:09:08,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:08,878 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1443 transitions. [2021-06-12 20:09:08,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:08,878 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1443 transitions. [2021-06-12 20:09:08,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:08,878 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:08,879 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:09,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1076 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6249 [2021-06-12 20:09:09,079 INFO L430 AbstractCegarLoop]: === Iteration 1088 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:09,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:09,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1568079595, now seen corresponding path program 1076 times [2021-06-12 20:09:09,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:09,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133323256] [2021-06-12 20:09:09,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:09,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:09,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133323256] [2021-06-12 20:09:09,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133323256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:09,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206711798] [2021-06-12 20:09:09,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1077 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1077 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:09,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:09:09,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:09,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:09,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:09,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:09,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:09,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:09,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:09,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:09:09,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:09,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:09,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:09,288 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:09,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:09,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:09:09,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:09,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206711798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:09,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:09,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:09:09,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020245966] [2021-06-12 20:09:09,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:09:09,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:09,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:09:09,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:09:09,318 INFO L87 Difference]: Start difference. First operand 460 states and 1443 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:09,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:09,575 INFO L93 Difference]: Finished difference Result 704 states and 2168 transitions. [2021-06-12 20:09:09,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:09:09,576 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:09,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:09,577 INFO L225 Difference]: With dead ends: 704 [2021-06-12 20:09:09,577 INFO L226 Difference]: Without dead ends: 683 [2021-06-12 20:09:09,577 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 200.7ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:09:09,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-06-12 20:09:09,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 466. [2021-06-12 20:09:09,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.1483870967741936) internal successors, (1464), 465 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:09,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1464 transitions. [2021-06-12 20:09:09,582 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1464 transitions. Word has length 21 [2021-06-12 20:09:09,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:09,582 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1464 transitions. [2021-06-12 20:09:09,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:09,582 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1464 transitions. [2021-06-12 20:09:09,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:09,583 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:09,583 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:09,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6253,1077 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:09,783 INFO L430 AbstractCegarLoop]: === Iteration 1089 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:09,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:09,784 INFO L82 PathProgramCache]: Analyzing trace with hash 238151433, now seen corresponding path program 1077 times [2021-06-12 20:09:09,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:09,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414389103] [2021-06-12 20:09:09,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:09,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:09,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:09,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414389103] [2021-06-12 20:09:09,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414389103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:09,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437317018] [2021-06-12 20:09:09,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1078 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1078 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:09,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:09:09,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:09,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:09,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:09,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:09,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:09,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:09,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:09,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:09:09,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:09,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:09,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:09,976 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:09,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:09,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:09:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:09,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437317018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:09,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:09,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:09:09,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382594635] [2021-06-12 20:09:09,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:09:09,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:09,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:09:09,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:09:09,991 INFO L87 Difference]: Start difference. First operand 466 states and 1464 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:10,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:10,137 INFO L93 Difference]: Finished difference Result 597 states and 1842 transitions. [2021-06-12 20:09:10,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:09:10,138 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:10,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:10,139 INFO L225 Difference]: With dead ends: 597 [2021-06-12 20:09:10,139 INFO L226 Difference]: Without dead ends: 576 [2021-06-12 20:09:10,139 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 140.2ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:10,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-12 20:09:10,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 463. [2021-06-12 20:09:10,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.142857142857143) internal successors, (1452), 462 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:10,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1452 transitions. [2021-06-12 20:09:10,144 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1452 transitions. Word has length 21 [2021-06-12 20:09:10,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:10,144 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1452 transitions. [2021-06-12 20:09:10,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:10,144 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1452 transitions. [2021-06-12 20:09:10,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:10,144 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:10,144 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:10,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1078 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6256 [2021-06-12 20:09:10,345 INFO L430 AbstractCegarLoop]: === Iteration 1090 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:10,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:10,345 INFO L82 PathProgramCache]: Analyzing trace with hash -676930055, now seen corresponding path program 1078 times [2021-06-12 20:09:10,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:10,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674576415] [2021-06-12 20:09:10,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:10,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:10,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:10,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:10,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674576415] [2021-06-12 20:09:10,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674576415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:10,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465961270] [2021-06-12 20:09:10,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1079 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1079 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:10,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:09:10,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:10,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:10,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:10,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:10,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:10,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:10,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:10,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:09:10,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:10,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:10,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:10,538 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:10,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:10,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:09:10,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:10,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465961270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:10,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:10,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:09:10,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140808466] [2021-06-12 20:09:10,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:09:10,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:10,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:09:10,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:09:10,584 INFO L87 Difference]: Start difference. First operand 463 states and 1452 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:10,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:10,847 INFO L93 Difference]: Finished difference Result 712 states and 2190 transitions. [2021-06-12 20:09:10,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:09:10,847 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:10,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:10,848 INFO L225 Difference]: With dead ends: 712 [2021-06-12 20:09:10,848 INFO L226 Difference]: Without dead ends: 691 [2021-06-12 20:09:10,848 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 197.8ms TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:09:10,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-06-12 20:09:10,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 459. [2021-06-12 20:09:10,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 3.1419213973799125) internal successors, (1439), 458 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:10,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1439 transitions. [2021-06-12 20:09:10,853 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1439 transitions. Word has length 21 [2021-06-12 20:09:10,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:10,853 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 1439 transitions. [2021-06-12 20:09:10,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:10,853 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1439 transitions. [2021-06-12 20:09:10,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:10,854 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:10,854 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:11,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6259,1079 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:11,054 INFO L430 AbstractCegarLoop]: === Iteration 1091 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:11,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:11,055 INFO L82 PathProgramCache]: Analyzing trace with hash 915945025, now seen corresponding path program 1079 times [2021-06-12 20:09:11,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:11,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303715412] [2021-06-12 20:09:11,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:11,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:11,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303715412] [2021-06-12 20:09:11,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303715412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:11,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339255309] [2021-06-12 20:09:11,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1080 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1080 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:11,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:09:11,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:11,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:09:11,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:11,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:11,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:11,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:11,167 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:11,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:11,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:11,180 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:37 [2021-06-12 20:09:11,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:11,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:11,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 20:09:11,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:11,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:11,258 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:11,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:11,259 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:21 [2021-06-12 20:09:11,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:11,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339255309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:11,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:11,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:09:11,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313438384] [2021-06-12 20:09:11,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:09:11,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:11,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:09:11,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:09:11,309 INFO L87 Difference]: Start difference. First operand 459 states and 1439 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:12,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:12,416 INFO L93 Difference]: Finished difference Result 1019 states and 3104 transitions. [2021-06-12 20:09:12,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:09:12,416 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:12,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:12,418 INFO L225 Difference]: With dead ends: 1019 [2021-06-12 20:09:12,418 INFO L226 Difference]: Without dead ends: 977 [2021-06-12 20:09:12,418 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 809.4ms TimeCoverageRelationStatistics Valid=366, Invalid=1614, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:09:12,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-06-12 20:09:12,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 465. [2021-06-12 20:09:12,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.1400862068965516) internal successors, (1457), 464 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:12,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1457 transitions. [2021-06-12 20:09:12,425 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1457 transitions. Word has length 21 [2021-06-12 20:09:12,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:12,425 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1457 transitions. [2021-06-12 20:09:12,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:12,425 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1457 transitions. [2021-06-12 20:09:12,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:12,425 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:12,425 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:12,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6262,1080 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:12,626 INFO L430 AbstractCegarLoop]: === Iteration 1092 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:12,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:12,626 INFO L82 PathProgramCache]: Analyzing trace with hash 798687523, now seen corresponding path program 1080 times [2021-06-12 20:09:12,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:12,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690988809] [2021-06-12 20:09:12,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:12,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:12,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690988809] [2021-06-12 20:09:12,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690988809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:12,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895514074] [2021-06-12 20:09:12,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1081 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1081 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:12,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:09:12,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:12,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:12,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:12,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:12,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:12,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:12,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:12,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:09:12,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:12,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:12,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:12,808 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:12,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:12,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:09:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:12,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895514074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:12,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:12,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:09:12,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49879750] [2021-06-12 20:09:12,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:09:12,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:12,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:09:12,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:12,850 INFO L87 Difference]: Start difference. First operand 465 states and 1457 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:13,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:13,082 INFO L93 Difference]: Finished difference Result 779 states and 2387 transitions. [2021-06-12 20:09:13,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:09:13,082 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:13,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:13,083 INFO L225 Difference]: With dead ends: 779 [2021-06-12 20:09:13,083 INFO L226 Difference]: Without dead ends: 758 [2021-06-12 20:09:13,084 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 186.4ms TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:09:13,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-06-12 20:09:13,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 458. [2021-06-12 20:09:13,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.140043763676149) internal successors, (1435), 457 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:13,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1435 transitions. [2021-06-12 20:09:13,089 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1435 transitions. Word has length 21 [2021-06-12 20:09:13,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:13,089 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1435 transitions. [2021-06-12 20:09:13,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:13,089 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1435 transitions. [2021-06-12 20:09:13,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:13,090 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:13,090 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:13,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6270,1081 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:13,290 INFO L430 AbstractCegarLoop]: === Iteration 1093 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:13,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:13,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1489336201, now seen corresponding path program 1081 times [2021-06-12 20:09:13,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:13,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761639711] [2021-06-12 20:09:13,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:13,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:13,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761639711] [2021-06-12 20:09:13,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761639711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:13,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395597113] [2021-06-12 20:09:13,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1082 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1082 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:13,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:13,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:13,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:13,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:13,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:13,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:13,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:13,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:13,435 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:09:13,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:13,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:13,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:13,481 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:13,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:13,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-06-12 20:09:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:13,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395597113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:13,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:13,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:09:13,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294459753] [2021-06-12 20:09:13,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:09:13,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:13,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:09:13,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:09:13,495 INFO L87 Difference]: Start difference. First operand 458 states and 1435 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:13,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:13,689 INFO L93 Difference]: Finished difference Result 668 states and 2020 transitions. [2021-06-12 20:09:13,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:09:13,689 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:13,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:13,690 INFO L225 Difference]: With dead ends: 668 [2021-06-12 20:09:13,690 INFO L226 Difference]: Without dead ends: 646 [2021-06-12 20:09:13,690 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 141.5ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:13,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-06-12 20:09:13,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 466. [2021-06-12 20:09:13,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.1333333333333333) internal successors, (1457), 465 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:13,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1457 transitions. [2021-06-12 20:09:13,695 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1457 transitions. Word has length 21 [2021-06-12 20:09:13,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:13,695 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1457 transitions. [2021-06-12 20:09:13,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:13,695 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1457 transitions. [2021-06-12 20:09:13,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:13,696 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:13,696 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:13,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1082 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6273 [2021-06-12 20:09:13,896 INFO L430 AbstractCegarLoop]: === Iteration 1094 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:13,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:13,897 INFO L82 PathProgramCache]: Analyzing trace with hash -864012083, now seen corresponding path program 1082 times [2021-06-12 20:09:13,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:13,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996658621] [2021-06-12 20:09:13,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:13,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:13,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:13,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996658621] [2021-06-12 20:09:13,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996658621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:13,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633008946] [2021-06-12 20:09:13,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1083 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1083 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:14,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:09:14,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:14,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:14,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:14,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:14,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:14,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:14,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:14,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 20:09:14,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:09:14,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:14,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:14,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:14,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:14,085 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:14,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:14,086 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:09:14,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:14,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633008946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:14,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:14,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:09:14,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662093695] [2021-06-12 20:09:14,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:09:14,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:14,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:09:14,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:14,131 INFO L87 Difference]: Start difference. First operand 466 states and 1457 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:14,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:14,492 INFO L93 Difference]: Finished difference Result 807 states and 2429 transitions. [2021-06-12 20:09:14,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:09:14,492 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:14,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:14,493 INFO L225 Difference]: With dead ends: 807 [2021-06-12 20:09:14,493 INFO L226 Difference]: Without dead ends: 780 [2021-06-12 20:09:14,493 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 274.1ms TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:09:14,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-06-12 20:09:14,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 466. [2021-06-12 20:09:14,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.129032258064516) internal successors, (1455), 465 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:14,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1455 transitions. [2021-06-12 20:09:14,499 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1455 transitions. Word has length 21 [2021-06-12 20:09:14,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:14,499 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1455 transitions. [2021-06-12 20:09:14,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:14,499 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1455 transitions. [2021-06-12 20:09:14,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:14,500 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:14,500 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:14,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6276,1083 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:14,700 INFO L430 AbstractCegarLoop]: === Iteration 1095 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:14,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:14,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1148274767, now seen corresponding path program 1083 times [2021-06-12 20:09:14,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:14,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503498695] [2021-06-12 20:09:14,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:14,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:14,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:14,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503498695] [2021-06-12 20:09:14,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503498695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:14,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815515431] [2021-06-12 20:09:14,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1084 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1084 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:14,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:09:14,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:14,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:14,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:14,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:14,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:14,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:14,851 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:14,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:14,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:14,861 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:09:14,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:14,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:14,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:14,916 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:14,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:14,919 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:14,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:14,925 INFO L518 ElimStorePlain]: Eliminatee v_prenex_326 vanished before elimination [2021-06-12 20:09:14,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:14,925 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:13 [2021-06-12 20:09:14,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:14,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815515431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:14,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:14,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:09:14,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340058417] [2021-06-12 20:09:14,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:09:14,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:14,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:09:14,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:14,974 INFO L87 Difference]: Start difference. First operand 466 states and 1455 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:15,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:15,372 INFO L93 Difference]: Finished difference Result 730 states and 2233 transitions. [2021-06-12 20:09:15,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:09:15,372 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:15,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:15,373 INFO L225 Difference]: With dead ends: 730 [2021-06-12 20:09:15,373 INFO L226 Difference]: Without dead ends: 703 [2021-06-12 20:09:15,373 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 301.9ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:09:15,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-06-12 20:09:15,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 471. [2021-06-12 20:09:15,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.1319148936170214) internal successors, (1472), 470 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:15,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1472 transitions. [2021-06-12 20:09:15,379 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1472 transitions. Word has length 21 [2021-06-12 20:09:15,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:15,379 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1472 transitions. [2021-06-12 20:09:15,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:15,379 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1472 transitions. [2021-06-12 20:09:15,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:15,379 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:15,379 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:15,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1084 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6279 [2021-06-12 20:09:15,580 INFO L430 AbstractCegarLoop]: === Iteration 1096 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:15,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:15,580 INFO L82 PathProgramCache]: Analyzing trace with hash 538117073, now seen corresponding path program 1084 times [2021-06-12 20:09:15,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:15,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749358527] [2021-06-12 20:09:15,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:15,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:15,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:15,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:15,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749358527] [2021-06-12 20:09:15,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749358527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:15,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979487956] [2021-06-12 20:09:15,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1085 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1085 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:15,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:09:15,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:15,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:15,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:15,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:15,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:15,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:15,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:15,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:15,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:15,738 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:09:15,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:15,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:15,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:15,797 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:15,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:15,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:09:15,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:15,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979487956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:15,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:15,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:09:15,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501491613] [2021-06-12 20:09:15,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:09:15,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:15,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:09:15,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:15,827 INFO L87 Difference]: Start difference. First operand 471 states and 1472 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:16,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:16,255 INFO L93 Difference]: Finished difference Result 669 states and 2050 transitions. [2021-06-12 20:09:16,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:09:16,255 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:16,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:16,256 INFO L225 Difference]: With dead ends: 669 [2021-06-12 20:09:16,256 INFO L226 Difference]: Without dead ends: 648 [2021-06-12 20:09:16,256 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 275.7ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:09:16,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-06-12 20:09:16,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 470. [2021-06-12 20:09:16,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.138592750533049) internal successors, (1472), 469 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:16,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1472 transitions. [2021-06-12 20:09:16,261 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1472 transitions. Word has length 21 [2021-06-12 20:09:16,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:16,261 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1472 transitions. [2021-06-12 20:09:16,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:16,261 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1472 transitions. [2021-06-12 20:09:16,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:16,262 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:16,262 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:16,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6291,1085 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:16,462 INFO L430 AbstractCegarLoop]: === Iteration 1097 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:16,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:16,463 INFO L82 PathProgramCache]: Analyzing trace with hash 560621445, now seen corresponding path program 1085 times [2021-06-12 20:09:16,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:16,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272762426] [2021-06-12 20:09:16,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:16,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:16,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:16,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:16,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272762426] [2021-06-12 20:09:16,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272762426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:16,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997938898] [2021-06-12 20:09:16,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1086 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1086 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:16,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:09:16,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:16,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:16,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:16,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:16,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:16,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:16,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:16,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:16,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:16,606 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:09:16,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:16,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:16,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:16,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:16,644 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:16,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:16,652 INFO L518 ElimStorePlain]: Eliminatee v_prenex_328 vanished before elimination [2021-06-12 20:09:16,652 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:16,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:16,653 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:21 [2021-06-12 20:09:16,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:16,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997938898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:16,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:16,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:09:16,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007212729] [2021-06-12 20:09:16,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:09:16,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:16,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:09:16,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:09:16,686 INFO L87 Difference]: Start difference. First operand 470 states and 1472 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:16,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:16,946 INFO L93 Difference]: Finished difference Result 719 states and 2182 transitions. [2021-06-12 20:09:16,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:09:16,946 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:16,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:16,947 INFO L225 Difference]: With dead ends: 719 [2021-06-12 20:09:16,947 INFO L226 Difference]: Without dead ends: 690 [2021-06-12 20:09:16,947 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 160.7ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:16,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-06-12 20:09:16,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 470. [2021-06-12 20:09:16,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.138592750533049) internal successors, (1472), 469 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:16,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1472 transitions. [2021-06-12 20:09:16,953 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1472 transitions. Word has length 21 [2021-06-12 20:09:16,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:16,953 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1472 transitions. [2021-06-12 20:09:16,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:16,953 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1472 transitions. [2021-06-12 20:09:16,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:16,953 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:16,953 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:17,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1086 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6298 [2021-06-12 20:09:17,154 INFO L430 AbstractCegarLoop]: === Iteration 1098 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:17,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:17,154 INFO L82 PathProgramCache]: Analyzing trace with hash 857887855, now seen corresponding path program 1086 times [2021-06-12 20:09:17,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:17,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476167885] [2021-06-12 20:09:17,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:17,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:17,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:17,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:17,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476167885] [2021-06-12 20:09:17,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476167885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:17,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655615409] [2021-06-12 20:09:17,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1087 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1087 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:17,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:09:17,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:17,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:17,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:17,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:17,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:17,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:17,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:17,300 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 20:09:17,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:17,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:17,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-12 20:09:17,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:17,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:17,333 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:17,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:17,334 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:45, output treesize:19 [2021-06-12 20:09:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:17,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655615409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:17,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:17,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:09:17,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823970526] [2021-06-12 20:09:17,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:09:17,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:17,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:09:17,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:17,405 INFO L87 Difference]: Start difference. First operand 470 states and 1472 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:17,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:17,905 INFO L93 Difference]: Finished difference Result 837 states and 2519 transitions. [2021-06-12 20:09:17,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:09:17,905 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:17,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:17,907 INFO L225 Difference]: With dead ends: 837 [2021-06-12 20:09:17,907 INFO L226 Difference]: Without dead ends: 814 [2021-06-12 20:09:17,907 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 408.3ms TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:09:17,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-06-12 20:09:17,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 469. [2021-06-12 20:09:17,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.1474358974358974) internal successors, (1473), 468 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:17,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1473 transitions. [2021-06-12 20:09:17,912 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1473 transitions. Word has length 21 [2021-06-12 20:09:17,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:17,912 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1473 transitions. [2021-06-12 20:09:17,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:17,913 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1473 transitions. [2021-06-12 20:09:17,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:17,913 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:17,913 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:18,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6303,1087 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:18,114 INFO L430 AbstractCegarLoop]: === Iteration 1099 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:18,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:18,114 INFO L82 PathProgramCache]: Analyzing trace with hash 573625171, now seen corresponding path program 1087 times [2021-06-12 20:09:18,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:18,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716913042] [2021-06-12 20:09:18,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:18,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:18,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716913042] [2021-06-12 20:09:18,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716913042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:18,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524289351] [2021-06-12 20:09:18,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1088 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1088 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:18,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:18,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:18,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:18,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:18,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:18,269 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:18,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:18,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:18,278 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:09:18,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:18,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:18,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:18,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:18,317 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:18,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:18,325 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:18,325 INFO L518 ElimStorePlain]: Eliminatee v_prenex_330 vanished before elimination [2021-06-12 20:09:18,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:18,325 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:19 [2021-06-12 20:09:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:18,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524289351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:18,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:18,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:09:18,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987634196] [2021-06-12 20:09:18,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:09:18,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:18,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:09:18,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:18,399 INFO L87 Difference]: Start difference. First operand 469 states and 1473 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:18,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:18,770 INFO L93 Difference]: Finished difference Result 754 states and 2295 transitions. [2021-06-12 20:09:18,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:09:18,770 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:18,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:18,771 INFO L225 Difference]: With dead ends: 754 [2021-06-12 20:09:18,771 INFO L226 Difference]: Without dead ends: 727 [2021-06-12 20:09:18,771 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 312.3ms TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:09:18,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-06-12 20:09:18,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 468. [2021-06-12 20:09:18,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.1413276231263385) internal successors, (1467), 467 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:18,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1467 transitions. [2021-06-12 20:09:18,777 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1467 transitions. Word has length 21 [2021-06-12 20:09:18,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:18,777 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1467 transitions. [2021-06-12 20:09:18,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:18,777 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1467 transitions. [2021-06-12 20:09:18,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:18,777 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:18,777 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:18,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1088 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6309 [2021-06-12 20:09:18,978 INFO L430 AbstractCegarLoop]: === Iteration 1100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:18,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:18,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1645652335, now seen corresponding path program 1088 times [2021-06-12 20:09:18,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:18,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603365868] [2021-06-12 20:09:18,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:19,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:19,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603365868] [2021-06-12 20:09:19,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603365868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:19,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219959836] [2021-06-12 20:09:19,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1089 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1089 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:19,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:09:19,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:19,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:19,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:19,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:19,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:19,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:19,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:19,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:19,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:19,146 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:09:19,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:19,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:19,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:19,184 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:19,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:19,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:09:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:19,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219959836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:19,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:19,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:09:19,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884177556] [2021-06-12 20:09:19,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:09:19,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:19,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:09:19,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:19,228 INFO L87 Difference]: Start difference. First operand 468 states and 1467 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:19,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:19,560 INFO L93 Difference]: Finished difference Result 682 states and 2091 transitions. [2021-06-12 20:09:19,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:09:19,560 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:19,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:19,561 INFO L225 Difference]: With dead ends: 682 [2021-06-12 20:09:19,561 INFO L226 Difference]: Without dead ends: 661 [2021-06-12 20:09:19,561 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 266.5ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:09:19,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-06-12 20:09:19,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 463. [2021-06-12 20:09:19,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.1277056277056277) internal successors, (1445), 462 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:19,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1445 transitions. [2021-06-12 20:09:19,566 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1445 transitions. Word has length 21 [2021-06-12 20:09:19,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:19,566 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1445 transitions. [2021-06-12 20:09:19,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:19,566 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1445 transitions. [2021-06-12 20:09:19,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:19,567 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:19,567 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:19,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1089 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6321 [2021-06-12 20:09:19,767 INFO L430 AbstractCegarLoop]: === Iteration 1101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:19,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:19,768 INFO L82 PathProgramCache]: Analyzing trace with hash -2037100907, now seen corresponding path program 1089 times [2021-06-12 20:09:19,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:19,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955834313] [2021-06-12 20:09:19,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:19,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:19,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:19,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:19,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955834313] [2021-06-12 20:09:19,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955834313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:19,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233282616] [2021-06-12 20:09:19,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1090 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1090 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:19,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:09:19,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:19,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:19,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:19,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:19,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:19,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:19,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:19,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-06-12 20:09:19,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:09:19,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:19,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:09:19,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:19,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:19,936 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:19,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:19,937 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-06-12 20:09:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:19,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233282616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:19,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:19,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:09:19,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450170314] [2021-06-12 20:09:19,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:09:19,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:19,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:09:19,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:09:19,971 INFO L87 Difference]: Start difference. First operand 463 states and 1445 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:20,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:20,171 INFO L93 Difference]: Finished difference Result 688 states and 2078 transitions. [2021-06-12 20:09:20,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:09:20,172 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:20,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:20,173 INFO L225 Difference]: With dead ends: 688 [2021-06-12 20:09:20,173 INFO L226 Difference]: Without dead ends: 652 [2021-06-12 20:09:20,173 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 145.4ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:20,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-12 20:09:20,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 464. [2021-06-12 20:09:20,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.1317494600431965) internal successors, (1450), 463 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:20,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1450 transitions. [2021-06-12 20:09:20,178 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1450 transitions. Word has length 21 [2021-06-12 20:09:20,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:20,178 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1450 transitions. [2021-06-12 20:09:20,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:20,178 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1450 transitions. [2021-06-12 20:09:20,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:20,178 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:20,178 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:20,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6325,1090 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:20,379 INFO L430 AbstractCegarLoop]: === Iteration 1102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:20,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:20,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1739834497, now seen corresponding path program 1090 times [2021-06-12 20:09:20,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:20,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905023139] [2021-06-12 20:09:20,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:20,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:20,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905023139] [2021-06-12 20:09:20,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905023139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:20,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097086111] [2021-06-12 20:09:20,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1091 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1091 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:20,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:09:20,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:20,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:20,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:20,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:20,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:20,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:20,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:20,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:20,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:20,538 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:09:20,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:20,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:20,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:20,575 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:20,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:20,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:20,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:20,585 INFO L518 ElimStorePlain]: Eliminatee v_prenex_332 vanished before elimination [2021-06-12 20:09:20,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:20,586 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:19 [2021-06-12 20:09:20,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:20,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097086111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:20,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:20,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:09:20,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845815782] [2021-06-12 20:09:20,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:09:20,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:20,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:09:20,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:20,655 INFO L87 Difference]: Start difference. First operand 464 states and 1450 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:21,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:21,160 INFO L93 Difference]: Finished difference Result 836 states and 2505 transitions. [2021-06-12 20:09:21,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:09:21,160 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:21,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:21,161 INFO L225 Difference]: With dead ends: 836 [2021-06-12 20:09:21,161 INFO L226 Difference]: Without dead ends: 813 [2021-06-12 20:09:21,161 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 386.2ms TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:09:21,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2021-06-12 20:09:21,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 479. [2021-06-12 20:09:21,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.1485355648535567) internal successors, (1505), 478 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:21,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1505 transitions. [2021-06-12 20:09:21,167 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1505 transitions. Word has length 21 [2021-06-12 20:09:21,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:21,167 INFO L482 AbstractCegarLoop]: Abstraction has 479 states and 1505 transitions. [2021-06-12 20:09:21,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:21,167 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1505 transitions. [2021-06-12 20:09:21,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:21,167 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:21,168 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:21,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6328,1091 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:21,368 INFO L430 AbstractCegarLoop]: === Iteration 1103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:21,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:21,368 INFO L82 PathProgramCache]: Analyzing trace with hash -2024097181, now seen corresponding path program 1091 times [2021-06-12 20:09:21,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:21,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081311964] [2021-06-12 20:09:21,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:21,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:21,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081311964] [2021-06-12 20:09:21,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081311964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:21,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859811149] [2021-06-12 20:09:21,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1092 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1092 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:21,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:09:21,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:21,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:09:21,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:21,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:21,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:21,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:21,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:21,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:21,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:21,534 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:09:21,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:21,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:21,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:21,564 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:21,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:21,594 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:21,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:21,597 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:21,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:21,599 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:21,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:21,624 INFO L518 ElimStorePlain]: Eliminatee v_prenex_334 vanished before elimination [2021-06-12 20:09:21,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:09:21,625 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:105, output treesize:57 [2021-06-12 20:09:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:21,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859811149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:21,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:21,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:09:21,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385095257] [2021-06-12 20:09:21,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:09:21,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:21,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:09:21,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:21,742 INFO L87 Difference]: Start difference. First operand 479 states and 1505 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:22,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:22,406 INFO L93 Difference]: Finished difference Result 760 states and 2345 transitions. [2021-06-12 20:09:22,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:09:22,406 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:22,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:22,407 INFO L225 Difference]: With dead ends: 760 [2021-06-12 20:09:22,407 INFO L226 Difference]: Without dead ends: 712 [2021-06-12 20:09:22,407 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 573.1ms TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:09:22,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-06-12 20:09:22,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 485. [2021-06-12 20:09:22,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.146694214876033) internal successors, (1523), 484 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:22,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1523 transitions. [2021-06-12 20:09:22,413 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1523 transitions. Word has length 21 [2021-06-12 20:09:22,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:22,413 INFO L482 AbstractCegarLoop]: Abstraction has 485 states and 1523 transitions. [2021-06-12 20:09:22,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:22,413 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1523 transitions. [2021-06-12 20:09:22,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:22,413 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:22,413 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:22,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6336,1092 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:22,614 INFO L430 AbstractCegarLoop]: === Iteration 1104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:22,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:22,614 INFO L82 PathProgramCache]: Analyzing trace with hash 310123149, now seen corresponding path program 1092 times [2021-06-12 20:09:22,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:22,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151856862] [2021-06-12 20:09:22,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:22,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:22,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:22,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:22,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151856862] [2021-06-12 20:09:22,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151856862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:22,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804095831] [2021-06-12 20:09:22,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1093 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1093 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:22,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:09:22,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:22,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:22,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:22,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:22,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:22,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:22,749 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:22,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:22,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:22,759 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:09:22,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:22,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:22,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:22,797 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:22,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:22,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:09:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:22,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804095831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:22,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:22,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:09:22,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340877339] [2021-06-12 20:09:22,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:09:22,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:22,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:09:22,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:09:22,813 INFO L87 Difference]: Start difference. First operand 485 states and 1523 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:22,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:22,998 INFO L93 Difference]: Finished difference Result 694 states and 2096 transitions. [2021-06-12 20:09:22,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:09:22,998 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:22,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:22,999 INFO L225 Difference]: With dead ends: 694 [2021-06-12 20:09:22,999 INFO L226 Difference]: Without dead ends: 675 [2021-06-12 20:09:22,999 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:23,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-06-12 20:09:23,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 469. [2021-06-12 20:09:23,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.138888888888889) internal successors, (1469), 468 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:23,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1469 transitions. [2021-06-12 20:09:23,004 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1469 transitions. Word has length 21 [2021-06-12 20:09:23,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:23,004 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1469 transitions. [2021-06-12 20:09:23,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:23,004 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1469 transitions. [2021-06-12 20:09:23,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:23,005 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:23,005 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:23,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1093 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6349 [2021-06-12 20:09:23,205 INFO L430 AbstractCegarLoop]: === Iteration 1105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:23,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:23,206 INFO L82 PathProgramCache]: Analyzing trace with hash 855495803, now seen corresponding path program 1093 times [2021-06-12 20:09:23,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:23,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933451298] [2021-06-12 20:09:23,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:23,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:23,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933451298] [2021-06-12 20:09:23,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933451298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:23,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819532599] [2021-06-12 20:09:23,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1094 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1094 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:23,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:23,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:23,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:23,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:23,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:23,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:23,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:23,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:23,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:23,356 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:09:23,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:23,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:23,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:23,418 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:23,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:23,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:09:23,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:23,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819532599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:23,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:23,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:09:23,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802292283] [2021-06-12 20:09:23,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:09:23,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:23,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:09:23,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:09:23,429 INFO L87 Difference]: Start difference. First operand 469 states and 1469 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:23,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:23,648 INFO L93 Difference]: Finished difference Result 603 states and 1851 transitions. [2021-06-12 20:09:23,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:09:23,648 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:23,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:23,649 INFO L225 Difference]: With dead ends: 603 [2021-06-12 20:09:23,649 INFO L226 Difference]: Without dead ends: 582 [2021-06-12 20:09:23,649 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 171.4ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:09:23,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-06-12 20:09:23,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 466. [2021-06-12 20:09:23,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.1440860215053763) internal successors, (1462), 465 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:23,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1462 transitions. [2021-06-12 20:09:23,654 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1462 transitions. Word has length 21 [2021-06-12 20:09:23,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:23,654 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1462 transitions. [2021-06-12 20:09:23,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:23,654 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1462 transitions. [2021-06-12 20:09:23,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:23,654 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:23,654 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:23,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6352,1094 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:23,855 INFO L430 AbstractCegarLoop]: === Iteration 1106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:23,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:23,855 INFO L82 PathProgramCache]: Analyzing trace with hash -863488879, now seen corresponding path program 1094 times [2021-06-12 20:09:23,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:23,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274081810] [2021-06-12 20:09:23,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:23,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:23,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274081810] [2021-06-12 20:09:23,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274081810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:23,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848789734] [2021-06-12 20:09:23,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1095 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1095 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:23,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:09:23,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:23,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:23,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:24,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:24,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:24,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:24,021 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:24,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:24,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:24,031 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-06-12 20:09:24,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:24,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:24,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:24,070 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:24,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:24,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:09:24,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:24,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848789734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:24,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:24,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:09:24,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655991102] [2021-06-12 20:09:24,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:09:24,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:24,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:09:24,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:09:24,115 INFO L87 Difference]: Start difference. First operand 466 states and 1462 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:24,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:24,459 INFO L93 Difference]: Finished difference Result 665 states and 2040 transitions. [2021-06-12 20:09:24,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:09:24,459 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:24,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:24,460 INFO L225 Difference]: With dead ends: 665 [2021-06-12 20:09:24,460 INFO L226 Difference]: Without dead ends: 644 [2021-06-12 20:09:24,460 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 240.1ms TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:09:24,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-06-12 20:09:24,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 461. [2021-06-12 20:09:24,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.130434782608696) internal successors, (1440), 460 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:24,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1440 transitions. [2021-06-12 20:09:24,465 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1440 transitions. Word has length 21 [2021-06-12 20:09:24,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:24,465 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1440 transitions. [2021-06-12 20:09:24,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:24,465 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1440 transitions. [2021-06-12 20:09:24,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:24,466 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:24,466 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:24,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1095 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6359 [2021-06-12 20:09:24,666 INFO L430 AbstractCegarLoop]: === Iteration 1107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:24,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:24,666 INFO L82 PathProgramCache]: Analyzing trace with hash 532898299, now seen corresponding path program 1095 times [2021-06-12 20:09:24,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:24,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879587919] [2021-06-12 20:09:24,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:24,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:24,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879587919] [2021-06-12 20:09:24,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879587919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:24,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546144906] [2021-06-12 20:09:24,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1096 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1096 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:24,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:09:24,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:24,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:24,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:24,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:24,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:24,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:24,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:24,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:09:24,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:24,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:24,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:24,878 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:24,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:24,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:09:24,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:24,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546144906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:24,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:24,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:09:24,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200434715] [2021-06-12 20:09:24,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:09:24,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:24,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:09:24,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:09:24,908 INFO L87 Difference]: Start difference. First operand 461 states and 1440 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:25,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:25,188 INFO L93 Difference]: Finished difference Result 686 states and 2103 transitions. [2021-06-12 20:09:25,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:09:25,188 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:25,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:25,189 INFO L225 Difference]: With dead ends: 686 [2021-06-12 20:09:25,189 INFO L226 Difference]: Without dead ends: 665 [2021-06-12 20:09:25,189 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 248.1ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:09:25,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-06-12 20:09:25,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 467. [2021-06-12 20:09:25,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.1351931330472103) internal successors, (1461), 466 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:25,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1461 transitions. [2021-06-12 20:09:25,194 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1461 transitions. Word has length 21 [2021-06-12 20:09:25,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:25,194 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1461 transitions. [2021-06-12 20:09:25,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:25,194 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1461 transitions. [2021-06-12 20:09:25,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:25,195 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:25,195 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:25,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6363,1096 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:25,395 INFO L430 AbstractCegarLoop]: === Iteration 1108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:25,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:25,396 INFO L82 PathProgramCache]: Analyzing trace with hash -797029863, now seen corresponding path program 1096 times [2021-06-12 20:09:25,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:25,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138443778] [2021-06-12 20:09:25,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:25,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:25,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:25,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138443778] [2021-06-12 20:09:25,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138443778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:25,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283851520] [2021-06-12 20:09:25,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1097 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1097 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:25,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:09:25,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:25,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:25,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:25,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:25,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:25,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:25,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:25,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:09:25,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:25,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:25,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:25,580 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:25,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:25,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:09:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:25,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283851520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:25,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:25,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:09:25,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665099303] [2021-06-12 20:09:25,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:09:25,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:25,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:09:25,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:09:25,596 INFO L87 Difference]: Start difference. First operand 467 states and 1461 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:25,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:25,739 INFO L93 Difference]: Finished difference Result 586 states and 1805 transitions. [2021-06-12 20:09:25,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:09:25,739 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:25,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:25,740 INFO L225 Difference]: With dead ends: 586 [2021-06-12 20:09:25,740 INFO L226 Difference]: Without dead ends: 565 [2021-06-12 20:09:25,740 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 133.5ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:25,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-12 20:09:25,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 464. [2021-06-12 20:09:25,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.1295896328293735) internal successors, (1449), 463 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:25,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1449 transitions. [2021-06-12 20:09:25,745 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1449 transitions. Word has length 21 [2021-06-12 20:09:25,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:25,745 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1449 transitions. [2021-06-12 20:09:25,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:25,745 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1449 transitions. [2021-06-12 20:09:25,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:25,745 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:25,745 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:25,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1097 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6366 [2021-06-12 20:09:25,946 INFO L430 AbstractCegarLoop]: === Iteration 1109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:25,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:25,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1712111351, now seen corresponding path program 1097 times [2021-06-12 20:09:25,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:25,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874592427] [2021-06-12 20:09:25,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:25,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:26,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:26,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:26,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874592427] [2021-06-12 20:09:26,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874592427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:26,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514463679] [2021-06-12 20:09:26,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1098 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1098 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:26,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:09:26,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:26,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:09:26,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:26,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:26,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:26,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:26,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:26,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:09:26,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:26,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:26,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:26,139 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:26,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:26,154 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:26,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:26,154 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:31 [2021-06-12 20:09:26,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:26,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514463679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:26,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:26,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:09:26,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817236704] [2021-06-12 20:09:26,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:09:26,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:26,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:09:26,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:09:26,230 INFO L87 Difference]: Start difference. First operand 464 states and 1449 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:26,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:26,633 INFO L93 Difference]: Finished difference Result 675 states and 2082 transitions. [2021-06-12 20:09:26,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:09:26,633 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:26,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:26,634 INFO L225 Difference]: With dead ends: 675 [2021-06-12 20:09:26,634 INFO L226 Difference]: Without dead ends: 654 [2021-06-12 20:09:26,634 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 327.9ms TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:09:26,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-06-12 20:09:26,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 459. [2021-06-12 20:09:26,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 3.126637554585153) internal successors, (1432), 458 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:26,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1432 transitions. [2021-06-12 20:09:26,639 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1432 transitions. Word has length 21 [2021-06-12 20:09:26,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:26,639 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 1432 transitions. [2021-06-12 20:09:26,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:26,639 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1432 transitions. [2021-06-12 20:09:26,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:26,640 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:26,640 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:26,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6369,1098 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:26,840 INFO L430 AbstractCegarLoop]: === Iteration 1110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:26,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:26,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1050995239, now seen corresponding path program 1098 times [2021-06-12 20:09:26,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:26,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319199750] [2021-06-12 20:09:26,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:26,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:26,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319199750] [2021-06-12 20:09:26,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319199750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:26,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178101193] [2021-06-12 20:09:26,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1099 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1099 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:26,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:09:26,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:26,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:26,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:26,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:26,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:26,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:26,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:26,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-06-12 20:09:26,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-12 20:09:26,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:26,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-12 20:09:26,983 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:26,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:26,992 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:26,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:26,992 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-06-12 20:09:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:27,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178101193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:27,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:27,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:09:27,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343866261] [2021-06-12 20:09:27,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:09:27,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:27,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:09:27,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:09:27,026 INFO L87 Difference]: Start difference. First operand 459 states and 1432 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:27,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:27,240 INFO L93 Difference]: Finished difference Result 726 states and 2175 transitions. [2021-06-12 20:09:27,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:09:27,240 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:27,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:27,241 INFO L225 Difference]: With dead ends: 726 [2021-06-12 20:09:27,241 INFO L226 Difference]: Without dead ends: 679 [2021-06-12 20:09:27,241 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 140.3ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:27,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-06-12 20:09:27,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 463. [2021-06-12 20:09:27,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.1147186147186146) internal successors, (1439), 462 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:27,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1439 transitions. [2021-06-12 20:09:27,246 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1439 transitions. Word has length 21 [2021-06-12 20:09:27,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:27,247 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1439 transitions. [2021-06-12 20:09:27,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:27,247 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1439 transitions. [2021-06-12 20:09:27,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:27,247 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:27,247 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:27,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1099 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6375 [2021-06-12 20:09:27,448 INFO L430 AbstractCegarLoop]: === Iteration 1111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:27,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:27,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1348261649, now seen corresponding path program 1099 times [2021-06-12 20:09:27,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:27,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107518579] [2021-06-12 20:09:27,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:27,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:27,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:27,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:27,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107518579] [2021-06-12 20:09:27,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107518579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:27,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418475653] [2021-06-12 20:09:27,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:27,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:27,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:27,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:27,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:27,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:27,571 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:27,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:27,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:27,583 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:09:27,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:27,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:27,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:27,622 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:27,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:27,630 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:27,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:27,631 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:19 [2021-06-12 20:09:27,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:27,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418475653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:27,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:27,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:09:27,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506335470] [2021-06-12 20:09:27,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:09:27,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:27,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:09:27,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:09:27,682 INFO L87 Difference]: Start difference. First operand 463 states and 1439 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:27,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:27,986 INFO L93 Difference]: Finished difference Result 822 states and 2446 transitions. [2021-06-12 20:09:27,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:09:27,986 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:27,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:27,987 INFO L225 Difference]: With dead ends: 822 [2021-06-12 20:09:27,987 INFO L226 Difference]: Without dead ends: 799 [2021-06-12 20:09:27,987 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 256.4ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:09:27,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-06-12 20:09:27,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 488. [2021-06-12 20:09:27,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.137577002053388) internal successors, (1528), 487 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:27,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1528 transitions. [2021-06-12 20:09:27,993 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1528 transitions. Word has length 21 [2021-06-12 20:09:27,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:27,993 INFO L482 AbstractCegarLoop]: Abstraction has 488 states and 1528 transitions. [2021-06-12 20:09:27,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:27,993 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1528 transitions. [2021-06-12 20:09:27,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:27,994 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:27,994 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:28,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6378 [2021-06-12 20:09:28,194 INFO L430 AbstractCegarLoop]: === Iteration 1112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:28,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:28,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1063998965, now seen corresponding path program 1100 times [2021-06-12 20:09:28,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:28,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652680544] [2021-06-12 20:09:28,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:28,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:28,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:28,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652680544] [2021-06-12 20:09:28,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652680544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:28,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139787701] [2021-06-12 20:09:28,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:28,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:09:28,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:28,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:28,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:28,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:28,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:28,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:28,327 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:28,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:28,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:28,333 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:09:28,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:28,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:28,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:28,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:28,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:28,368 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:28,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:28,368 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:19 [2021-06-12 20:09:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:28,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139787701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:28,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:28,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:09:28,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874760686] [2021-06-12 20:09:28,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:09:28,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:28,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:09:28,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:09:28,449 INFO L87 Difference]: Start difference. First operand 488 states and 1528 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:28,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:28,870 INFO L93 Difference]: Finished difference Result 846 states and 2583 transitions. [2021-06-12 20:09:28,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:09:28,870 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:28,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:28,871 INFO L225 Difference]: With dead ends: 846 [2021-06-12 20:09:28,871 INFO L226 Difference]: Without dead ends: 819 [2021-06-12 20:09:28,871 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 289.7ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:09:28,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-06-12 20:09:28,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 501. [2021-06-12 20:09:28,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 3.148) internal successors, (1574), 500 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:28,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1574 transitions. [2021-06-12 20:09:28,877 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1574 transitions. Word has length 21 [2021-06-12 20:09:28,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:28,878 INFO L482 AbstractCegarLoop]: Abstraction has 501 states and 1574 transitions. [2021-06-12 20:09:28,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:28,878 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1574 transitions. [2021-06-12 20:09:28,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:28,878 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:28,878 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:29,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6385 [2021-06-12 20:09:29,079 INFO L430 AbstractCegarLoop]: === Iteration 1113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:29,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:29,079 INFO L82 PathProgramCache]: Analyzing trace with hash -896748001, now seen corresponding path program 1101 times [2021-06-12 20:09:29,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:29,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285573695] [2021-06-12 20:09:29,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:29,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:29,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:29,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285573695] [2021-06-12 20:09:29,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285573695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:29,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880206975] [2021-06-12 20:09:29,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:29,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:09:29,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:29,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:29,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:29,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:29,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:29,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:29,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:29,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:29,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:29,229 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:09:29,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:29,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:29,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:29,282 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:29,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:29,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:09:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:29,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880206975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:29,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:29,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:09:29,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236364513] [2021-06-12 20:09:29,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:09:29,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:29,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:09:29,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:09:29,303 INFO L87 Difference]: Start difference. First operand 501 states and 1574 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:29,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:29,522 INFO L93 Difference]: Finished difference Result 816 states and 2447 transitions. [2021-06-12 20:09:29,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:09:29,522 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:29,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:29,523 INFO L225 Difference]: With dead ends: 816 [2021-06-12 20:09:29,523 INFO L226 Difference]: Without dead ends: 797 [2021-06-12 20:09:29,524 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 169.4ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:09:29,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2021-06-12 20:09:29,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 499. [2021-06-12 20:09:29,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 3.1506024096385543) internal successors, (1569), 498 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:29,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1569 transitions. [2021-06-12 20:09:29,529 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1569 transitions. Word has length 21 [2021-06-12 20:09:29,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:29,529 INFO L482 AbstractCegarLoop]: Abstraction has 499 states and 1569 transitions. [2021-06-12 20:09:29,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:29,530 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1569 transitions. [2021-06-12 20:09:29,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:29,530 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:29,530 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:29,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6396 [2021-06-12 20:09:29,731 INFO L430 AbstractCegarLoop]: === Iteration 1114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:29,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:29,731 INFO L82 PathProgramCache]: Analyzing trace with hash -351375347, now seen corresponding path program 1102 times [2021-06-12 20:09:29,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:29,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370931540] [2021-06-12 20:09:29,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:29,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:29,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370931540] [2021-06-12 20:09:29,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370931540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:29,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541325680] [2021-06-12 20:09:29,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:29,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:09:29,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:29,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:29,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:29,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:29,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:29,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:29,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:29,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:29,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:29,887 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:09:29,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:29,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:29,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:29,940 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:29,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:29,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:09:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:29,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541325680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:29,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:29,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:09:29,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296358885] [2021-06-12 20:09:29,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:09:29,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:29,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:09:29,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:09:29,950 INFO L87 Difference]: Start difference. First operand 499 states and 1569 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:30,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:30,116 INFO L93 Difference]: Finished difference Result 748 states and 2284 transitions. [2021-06-12 20:09:30,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:09:30,116 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:30,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:30,117 INFO L225 Difference]: With dead ends: 748 [2021-06-12 20:09:30,117 INFO L226 Difference]: Without dead ends: 727 [2021-06-12 20:09:30,117 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 170.0ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:09:30,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-06-12 20:09:30,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 491. [2021-06-12 20:09:30,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.142857142857143) internal successors, (1540), 490 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:30,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1540 transitions. [2021-06-12 20:09:30,123 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1540 transitions. Word has length 21 [2021-06-12 20:09:30,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:30,123 INFO L482 AbstractCegarLoop]: Abstraction has 491 states and 1540 transitions. [2021-06-12 20:09:30,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:30,123 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1540 transitions. [2021-06-12 20:09:30,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:30,123 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:30,123 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:30,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6399 [2021-06-12 20:09:30,324 INFO L430 AbstractCegarLoop]: === Iteration 1115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:30,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:30,324 INFO L82 PathProgramCache]: Analyzing trace with hash 588341325, now seen corresponding path program 1103 times [2021-06-12 20:09:30,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:30,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854075687] [2021-06-12 20:09:30,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:30,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:30,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854075687] [2021-06-12 20:09:30,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854075687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:30,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687226238] [2021-06-12 20:09:30,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:30,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:09:30,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:30,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:09:30,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:30,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:30,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:30,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:30,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:30,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:30,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:30,462 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:09:30,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:30,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:30,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:30,495 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:30,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:30,510 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:30,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:30,511 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:31 [2021-06-12 20:09:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:30,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687226238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:30,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:30,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:09:30,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865215878] [2021-06-12 20:09:30,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:09:30,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:30,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:09:30,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:09:30,583 INFO L87 Difference]: Start difference. First operand 491 states and 1540 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:31,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:31,103 INFO L93 Difference]: Finished difference Result 902 states and 2699 transitions. [2021-06-12 20:09:31,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:09:31,103 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:31,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:31,104 INFO L225 Difference]: With dead ends: 902 [2021-06-12 20:09:31,105 INFO L226 Difference]: Without dead ends: 883 [2021-06-12 20:09:31,105 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 416.6ms TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:09:31,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-06-12 20:09:31,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 465. [2021-06-12 20:09:31,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.1293103448275863) internal successors, (1452), 464 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:31,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1452 transitions. [2021-06-12 20:09:31,110 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1452 transitions. Word has length 21 [2021-06-12 20:09:31,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:31,111 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1452 transitions. [2021-06-12 20:09:31,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:31,111 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1452 transitions. [2021-06-12 20:09:31,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:31,111 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:31,111 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:31,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6404,1104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:31,312 INFO L430 AbstractCegarLoop]: === Iteration 1116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:31,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:31,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1325837557, now seen corresponding path program 1104 times [2021-06-12 20:09:31,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:31,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587979355] [2021-06-12 20:09:31,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:31,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:31,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:31,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587979355] [2021-06-12 20:09:31,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587979355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:31,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367637950] [2021-06-12 20:09:31,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:31,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:09:31,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:31,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:31,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:31,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:31,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:31,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:31,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:31,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:31,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:31,421 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:09:31,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:31,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:31,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:31,445 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:31,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:31,446 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:09:31,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:31,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367637950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:31,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:31,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:09:31,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443796792] [2021-06-12 20:09:31,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:09:31,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:31,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:09:31,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:09:31,456 INFO L87 Difference]: Start difference. First operand 465 states and 1452 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:31,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:31,620 INFO L93 Difference]: Finished difference Result 820 states and 2474 transitions. [2021-06-12 20:09:31,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:09:31,620 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:31,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:31,621 INFO L225 Difference]: With dead ends: 820 [2021-06-12 20:09:31,622 INFO L226 Difference]: Without dead ends: 799 [2021-06-12 20:09:31,622 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:09:31,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-06-12 20:09:31,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 458. [2021-06-12 20:09:31,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.1269146608315097) internal successors, (1429), 457 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:31,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1429 transitions. [2021-06-12 20:09:31,627 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1429 transitions. Word has length 21 [2021-06-12 20:09:31,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:31,627 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1429 transitions. [2021-06-12 20:09:31,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:31,627 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1429 transitions. [2021-06-12 20:09:31,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:31,628 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:31,628 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:31,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6410 [2021-06-12 20:09:31,828 INFO L430 AbstractCegarLoop]: === Iteration 1117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:31,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:31,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1211465707, now seen corresponding path program 1105 times [2021-06-12 20:09:31,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:31,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557722033] [2021-06-12 20:09:31,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:31,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:31,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:31,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557722033] [2021-06-12 20:09:31,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557722033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:31,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533951480] [2021-06-12 20:09:31,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:31,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:31,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:31,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:31,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:31,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:31,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:31,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:09:31,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:31,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:32,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:32,001 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:32,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:32,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:09:32,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:32,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533951480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:32,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:32,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:09:32,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539715316] [2021-06-12 20:09:32,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:09:32,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:32,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:09:32,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:09:32,037 INFO L87 Difference]: Start difference. First operand 458 states and 1429 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:32,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:32,377 INFO L93 Difference]: Finished difference Result 726 states and 2225 transitions. [2021-06-12 20:09:32,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:09:32,378 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:32,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:32,378 INFO L225 Difference]: With dead ends: 726 [2021-06-12 20:09:32,378 INFO L226 Difference]: Without dead ends: 705 [2021-06-12 20:09:32,379 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 254.0ms TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:09:32,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-06-12 20:09:32,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 470. [2021-06-12 20:09:32,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.1300639658848612) internal successors, (1468), 469 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:32,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1468 transitions. [2021-06-12 20:09:32,384 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1468 transitions. Word has length 21 [2021-06-12 20:09:32,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:32,384 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1468 transitions. [2021-06-12 20:09:32,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:32,384 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1468 transitions. [2021-06-12 20:09:32,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:32,385 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:32,385 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:32,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6414,1106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:32,585 INFO L430 AbstractCegarLoop]: === Iteration 1118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:32,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:32,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1753573427, now seen corresponding path program 1106 times [2021-06-12 20:09:32,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:32,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858266256] [2021-06-12 20:09:32,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:32,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:32,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858266256] [2021-06-12 20:09:32,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858266256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:32,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337786394] [2021-06-12 20:09:32,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:32,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:09:32,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:32,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:32,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:32,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:32,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:32,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:32,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:32,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:09:32,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:32,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:32,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:32,750 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:32,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:32,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:09:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:32,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337786394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:32,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:32,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:09:32,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086335695] [2021-06-12 20:09:32,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:09:32,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:32,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:09:32,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:09:32,793 INFO L87 Difference]: Start difference. First operand 470 states and 1468 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:33,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:33,136 INFO L93 Difference]: Finished difference Result 720 states and 2210 transitions. [2021-06-12 20:09:33,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:09:33,137 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:33,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:33,137 INFO L225 Difference]: With dead ends: 720 [2021-06-12 20:09:33,138 INFO L226 Difference]: Without dead ends: 699 [2021-06-12 20:09:33,138 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 257.2ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:09:33,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-06-12 20:09:33,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 467. [2021-06-12 20:09:33,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.124463519313305) internal successors, (1456), 466 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1456 transitions. [2021-06-12 20:09:33,143 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1456 transitions. Word has length 21 [2021-06-12 20:09:33,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:33,143 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1456 transitions. [2021-06-12 20:09:33,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:33,143 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1456 transitions. [2021-06-12 20:09:33,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:33,143 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:33,143 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:33,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6417,1107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:33,344 INFO L430 AbstractCegarLoop]: === Iteration 1119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:33,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:33,344 INFO L82 PathProgramCache]: Analyzing trace with hash 838491939, now seen corresponding path program 1107 times [2021-06-12 20:09:33,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:33,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785529852] [2021-06-12 20:09:33,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:33,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:33,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:33,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785529852] [2021-06-12 20:09:33,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785529852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:33,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672098028] [2021-06-12 20:09:33,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:33,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:09:33,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:33,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:33,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:33,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:33,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:33,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:33,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:33,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:09:33,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:33,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:33,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:33,525 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:33,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:33,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:09:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:33,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672098028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:33,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:33,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:09:33,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741738771] [2021-06-12 20:09:33,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:09:33,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:33,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:09:33,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:33,567 INFO L87 Difference]: Start difference. First operand 467 states and 1456 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:33,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:33,886 INFO L93 Difference]: Finished difference Result 702 states and 2153 transitions. [2021-06-12 20:09:33,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:09:33,886 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:33,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:33,887 INFO L225 Difference]: With dead ends: 702 [2021-06-12 20:09:33,887 INFO L226 Difference]: Without dead ends: 681 [2021-06-12 20:09:33,887 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 236.8ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:09:33,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-06-12 20:09:33,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 464. [2021-06-12 20:09:33,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.125269978401728) internal successors, (1447), 463 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:33,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1447 transitions. [2021-06-12 20:09:33,892 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1447 transitions. Word has length 21 [2021-06-12 20:09:33,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:33,893 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1447 transitions. [2021-06-12 20:09:33,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:33,893 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1447 transitions. [2021-06-12 20:09:33,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:33,893 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:33,893 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:34,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6420 [2021-06-12 20:09:34,094 INFO L430 AbstractCegarLoop]: === Iteration 1120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:34,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:34,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1971386031, now seen corresponding path program 1108 times [2021-06-12 20:09:34,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:34,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896495067] [2021-06-12 20:09:34,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:34,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:34,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:34,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896495067] [2021-06-12 20:09:34,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896495067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:34,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741236766] [2021-06-12 20:09:34,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:34,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:09:34,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:34,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:34,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:34,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:34,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:34,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:34,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:34,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 20:09:34,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:34,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:34,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:34,243 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:34,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:34,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:09:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:34,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741236766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:34,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:34,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:09:34,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261953344] [2021-06-12 20:09:34,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:09:34,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:34,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:09:34,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:09:34,258 INFO L87 Difference]: Start difference. First operand 464 states and 1447 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:34,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:34,411 INFO L93 Difference]: Finished difference Result 739 states and 2244 transitions. [2021-06-12 20:09:34,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:09:34,411 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:34,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:34,412 INFO L225 Difference]: With dead ends: 739 [2021-06-12 20:09:34,412 INFO L226 Difference]: Without dead ends: 718 [2021-06-12 20:09:34,412 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:09:34,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-06-12 20:09:34,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 456. [2021-06-12 20:09:34,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.123076923076923) internal successors, (1421), 455 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:34,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1421 transitions. [2021-06-12 20:09:34,417 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1421 transitions. Word has length 21 [2021-06-12 20:09:34,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:34,417 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1421 transitions. [2021-06-12 20:09:34,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:34,417 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1421 transitions. [2021-06-12 20:09:34,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:34,418 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:34,418 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:34,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6423,1109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:34,618 INFO L430 AbstractCegarLoop]: === Iteration 1121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:34,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:34,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1619731609, now seen corresponding path program 1109 times [2021-06-12 20:09:34,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:34,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883027194] [2021-06-12 20:09:34,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:34,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:34,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883027194] [2021-06-12 20:09:34,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883027194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:34,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376238222] [2021-06-12 20:09:34,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:34,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:09:34,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:34,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:09:34,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:34,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:34,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:34,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:34,727 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:34,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:34,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:34,739 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:37 [2021-06-12 20:09:34,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:34,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:34,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 20:09:34,812 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:34,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:34,821 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:34,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:34,821 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:21 [2021-06-12 20:09:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:34,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376238222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:34,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:34,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:09:34,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514023583] [2021-06-12 20:09:34,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:09:34,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:34,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:09:34,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:09:34,866 INFO L87 Difference]: Start difference. First operand 456 states and 1421 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:35,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:35,938 INFO L93 Difference]: Finished difference Result 984 states and 2934 transitions. [2021-06-12 20:09:35,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:09:35,938 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:35,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:35,939 INFO L225 Difference]: With dead ends: 984 [2021-06-12 20:09:35,939 INFO L226 Difference]: Without dead ends: 942 [2021-06-12 20:09:35,939 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 754.4ms TimeCoverageRelationStatistics Valid=385, Invalid=1595, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:09:35,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-06-12 20:09:35,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 456. [2021-06-12 20:09:35,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.1164835164835165) internal successors, (1418), 455 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:35,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1418 transitions. [2021-06-12 20:09:35,945 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1418 transitions. Word has length 21 [2021-06-12 20:09:35,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:35,945 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1418 transitions. [2021-06-12 20:09:35,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:35,945 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1418 transitions. [2021-06-12 20:09:35,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:35,946 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:35,946 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:36,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6426 [2021-06-12 20:09:36,146 INFO L430 AbstractCegarLoop]: === Iteration 1122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:36,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:36,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1736989111, now seen corresponding path program 1110 times [2021-06-12 20:09:36,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:36,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985591848] [2021-06-12 20:09:36,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:36,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:36,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:36,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985591848] [2021-06-12 20:09:36,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985591848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:36,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902857561] [2021-06-12 20:09:36,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:36,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:09:36,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:36,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:36,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:36,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:36,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:36,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:36,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:36,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:09:36,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:36,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:36,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:36,304 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:36,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:36,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:09:36,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:36,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902857561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:36,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:36,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:09:36,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662749517] [2021-06-12 20:09:36,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:09:36,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:36,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:09:36,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:09:36,345 INFO L87 Difference]: Start difference. First operand 456 states and 1418 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:36,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:36,577 INFO L93 Difference]: Finished difference Result 771 states and 2302 transitions. [2021-06-12 20:09:36,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:09:36,577 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:36,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:36,578 INFO L225 Difference]: With dead ends: 771 [2021-06-12 20:09:36,578 INFO L226 Difference]: Without dead ends: 750 [2021-06-12 20:09:36,578 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 164.8ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:09:36,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-06-12 20:09:36,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 450. [2021-06-12 20:09:36,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 3.11804008908686) internal successors, (1400), 449 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:36,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1400 transitions. [2021-06-12 20:09:36,583 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1400 transitions. Word has length 21 [2021-06-12 20:09:36,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:36,583 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 1400 transitions. [2021-06-12 20:09:36,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:36,584 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1400 transitions. [2021-06-12 20:09:36,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:36,584 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:36,584 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:36,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6433 [2021-06-12 20:09:36,785 INFO L430 AbstractCegarLoop]: === Iteration 1123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:36,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:36,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1583006251, now seen corresponding path program 1111 times [2021-06-12 20:09:36,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:36,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224516397] [2021-06-12 20:09:36,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:36,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:36,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224516397] [2021-06-12 20:09:36,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224516397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:36,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626913834] [2021-06-12 20:09:36,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:36,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:36,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:36,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:36,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:36,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:36,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:36,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:09:36,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:36,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:36,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:36,953 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:36,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:36,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 20:09:36,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:36,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626913834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:36,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:36,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:09:36,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26788058] [2021-06-12 20:09:36,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:09:36,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:36,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:09:36,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:09:36,980 INFO L87 Difference]: Start difference. First operand 450 states and 1400 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:37,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:37,275 INFO L93 Difference]: Finished difference Result 745 states and 2221 transitions. [2021-06-12 20:09:37,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:09:37,275 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:37,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:37,276 INFO L225 Difference]: With dead ends: 745 [2021-06-12 20:09:37,276 INFO L226 Difference]: Without dead ends: 724 [2021-06-12 20:09:37,276 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 188.4ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:09:37,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-06-12 20:09:37,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 452. [2021-06-12 20:09:37,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.11529933481153) internal successors, (1405), 451 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:37,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1405 transitions. [2021-06-12 20:09:37,282 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1405 transitions. Word has length 21 [2021-06-12 20:09:37,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:37,282 INFO L482 AbstractCegarLoop]: Abstraction has 452 states and 1405 transitions. [2021-06-12 20:09:37,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:37,282 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1405 transitions. [2021-06-12 20:09:37,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:37,282 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:37,282 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:37,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6436,1112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:37,483 INFO L430 AbstractCegarLoop]: === Iteration 1124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:37,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:37,483 INFO L82 PathProgramCache]: Analyzing trace with hash 253078089, now seen corresponding path program 1112 times [2021-06-12 20:09:37,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:37,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776241134] [2021-06-12 20:09:37,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:37,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:37,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:37,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776241134] [2021-06-12 20:09:37,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776241134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:37,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226111466] [2021-06-12 20:09:37,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:37,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:09:37,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:37,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:37,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:37,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:37,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:37,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:37,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:37,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:09:37,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:37,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:37,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:37,645 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:37,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:37,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:09:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:37,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226111466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:37,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:37,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:09:37,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898881981] [2021-06-12 20:09:37,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:09:37,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:37,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:09:37,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:09:37,688 INFO L87 Difference]: Start difference. First operand 452 states and 1405 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:37,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:37,948 INFO L93 Difference]: Finished difference Result 739 states and 2206 transitions. [2021-06-12 20:09:37,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:09:37,949 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:37,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:37,950 INFO L225 Difference]: With dead ends: 739 [2021-06-12 20:09:37,950 INFO L226 Difference]: Without dead ends: 718 [2021-06-12 20:09:37,950 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 199.6ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:09:37,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-06-12 20:09:37,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 449. [2021-06-12 20:09:37,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 3.109375) internal successors, (1393), 448 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:37,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1393 transitions. [2021-06-12 20:09:37,955 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1393 transitions. Word has length 21 [2021-06-12 20:09:37,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:37,955 INFO L482 AbstractCegarLoop]: Abstraction has 449 states and 1393 transitions. [2021-06-12 20:09:37,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:37,955 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1393 transitions. [2021-06-12 20:09:37,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:37,956 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:37,956 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:38,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6439,1113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:38,156 INFO L430 AbstractCegarLoop]: === Iteration 1125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:38,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:38,156 INFO L82 PathProgramCache]: Analyzing trace with hash -662003399, now seen corresponding path program 1113 times [2021-06-12 20:09:38,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:38,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673600657] [2021-06-12 20:09:38,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:38,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:38,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:38,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673600657] [2021-06-12 20:09:38,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673600657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:38,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366622584] [2021-06-12 20:09:38,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:38,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:09:38,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:38,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:38,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:38,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:38,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:38,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:38,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:38,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:09:38,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:38,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:38,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:38,361 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:38,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:38,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:09:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:38,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366622584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:38,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:38,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:09:38,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107263450] [2021-06-12 20:09:38,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:09:38,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:38,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:09:38,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:09:38,403 INFO L87 Difference]: Start difference. First operand 449 states and 1393 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:38,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:38,623 INFO L93 Difference]: Finished difference Result 727 states and 2167 transitions. [2021-06-12 20:09:38,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:09:38,623 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:38,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:38,624 INFO L225 Difference]: With dead ends: 727 [2021-06-12 20:09:38,624 INFO L226 Difference]: Without dead ends: 706 [2021-06-12 20:09:38,624 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 187.3ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:09:38,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-06-12 20:09:38,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 446. [2021-06-12 20:09:38,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 3.1101123595505618) internal successors, (1384), 445 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:38,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1384 transitions. [2021-06-12 20:09:38,630 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1384 transitions. Word has length 21 [2021-06-12 20:09:38,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:38,630 INFO L482 AbstractCegarLoop]: Abstraction has 446 states and 1384 transitions. [2021-06-12 20:09:38,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:38,630 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1384 transitions. [2021-06-12 20:09:38,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:09:38,630 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:38,630 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:38,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6442,1114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:38,831 INFO L430 AbstractCegarLoop]: === Iteration 1126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:38,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:38,831 INFO L82 PathProgramCache]: Analyzing trace with hash 823085927, now seen corresponding path program 1114 times [2021-06-12 20:09:38,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:38,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253315536] [2021-06-12 20:09:38,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:38,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:38,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253315536] [2021-06-12 20:09:38,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253315536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:38,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272029830] [2021-06-12 20:09:38,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:38,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:09:38,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:38,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:38,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:38,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:38,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:38,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:38,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:38,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 20:09:38,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:09:38,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:38,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:38,972 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:38,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:38,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:09:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:39,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272029830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:39,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:39,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:09:39,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290930291] [2021-06-12 20:09:39,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:09:39,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:39,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:09:39,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:09:39,013 INFO L87 Difference]: Start difference. First operand 446 states and 1384 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:39,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:39,273 INFO L93 Difference]: Finished difference Result 819 states and 2413 transitions. [2021-06-12 20:09:39,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:09:39,273 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:09:39,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:39,274 INFO L225 Difference]: With dead ends: 819 [2021-06-12 20:09:39,274 INFO L226 Difference]: Without dead ends: 798 [2021-06-12 20:09:39,275 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 179.4ms TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:09:39,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-06-12 20:09:39,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 417. [2021-06-12 20:09:39,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 3.076923076923077) internal successors, (1280), 416 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:39,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1280 transitions. [2021-06-12 20:09:39,280 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1280 transitions. Word has length 21 [2021-06-12 20:09:39,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:39,280 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 1280 transitions. [2021-06-12 20:09:39,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:39,280 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1280 transitions. [2021-06-12 20:09:39,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:09:39,280 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:39,280 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:39,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6445,1115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:39,481 INFO L430 AbstractCegarLoop]: === Iteration 1127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:39,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:39,481 INFO L82 PathProgramCache]: Analyzing trace with hash 384168452, now seen corresponding path program 1115 times [2021-06-12 20:09:39,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:39,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956506290] [2021-06-12 20:09:39,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:39,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:39,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:39,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956506290] [2021-06-12 20:09:39,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956506290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:39,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023627092] [2021-06-12 20:09:39,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:39,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:09:39,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:39,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:09:39,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:39,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:09:39,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:39,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:09:39,600 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:39,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:39,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:39,603 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:25, output treesize:9 [2021-06-12 20:09:39,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:39,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:39,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:39,619 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:39,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:39,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2021-06-12 20:09:39,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:39,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023627092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:39,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:39,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:09:39,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650365054] [2021-06-12 20:09:39,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:09:39,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:39,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:09:39,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:09:39,627 INFO L87 Difference]: Start difference. First operand 417 states and 1280 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:39,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:39,740 INFO L93 Difference]: Finished difference Result 679 states and 2041 transitions. [2021-06-12 20:09:39,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:09:39,740 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:09:39,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:39,741 INFO L225 Difference]: With dead ends: 679 [2021-06-12 20:09:39,741 INFO L226 Difference]: Without dead ends: 651 [2021-06-12 20:09:39,741 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:09:39,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-06-12 20:09:39,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 427. [2021-06-12 20:09:39,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.0938967136150235) internal successors, (1318), 426 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:39,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1318 transitions. [2021-06-12 20:09:39,746 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1318 transitions. Word has length 22 [2021-06-12 20:09:39,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:39,746 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1318 transitions. [2021-06-12 20:09:39,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:39,746 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1318 transitions. [2021-06-12 20:09:39,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:09:39,747 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:39,747 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:39,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6448,1116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:39,947 INFO L430 AbstractCegarLoop]: === Iteration 1128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:39,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:39,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1340933574, now seen corresponding path program 1116 times [2021-06-12 20:09:39,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:39,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178359188] [2021-06-12 20:09:39,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:40,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:40,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178359188] [2021-06-12 20:09:40,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178359188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:40,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310498721] [2021-06-12 20:09:40,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:40,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:09:40,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:40,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:09:40,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:40,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:40,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:40,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:40,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:40,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 20:09:40,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:40,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:40,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:40,087 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:40,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:40,089 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:40,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:40,089 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:5 [2021-06-12 20:09:40,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:40,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310498721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:40,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:40,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:09:40,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767059692] [2021-06-12 20:09:40,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:09:40,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:40,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:09:40,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:09:40,097 INFO L87 Difference]: Start difference. First operand 427 states and 1318 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:40,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:40,257 INFO L93 Difference]: Finished difference Result 633 states and 1916 transitions. [2021-06-12 20:09:40,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:09:40,257 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:09:40,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:40,258 INFO L225 Difference]: With dead ends: 633 [2021-06-12 20:09:40,258 INFO L226 Difference]: Without dead ends: 575 [2021-06-12 20:09:40,258 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:09:40,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-06-12 20:09:40,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 428. [2021-06-12 20:09:40,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.088992974238876) internal successors, (1319), 427 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:40,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1319 transitions. [2021-06-12 20:09:40,262 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1319 transitions. Word has length 22 [2021-06-12 20:09:40,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:40,262 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 1319 transitions. [2021-06-12 20:09:40,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:40,262 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1319 transitions. [2021-06-12 20:09:40,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:09:40,263 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:40,263 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:40,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6452 [2021-06-12 20:09:40,463 INFO L430 AbstractCegarLoop]: === Iteration 1129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:40,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:40,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1558531740, now seen corresponding path program 1117 times [2021-06-12 20:09:40,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:40,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619284464] [2021-06-12 20:09:40,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:40,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:40,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:40,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619284464] [2021-06-12 20:09:40,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619284464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:40,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350179305] [2021-06-12 20:09:40,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:40,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:09:40,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:40,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:09:40,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:40,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:09:40,585 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:40,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:40,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:40,588 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:25, output treesize:9 [2021-06-12 20:09:40,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:40,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:40,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:40,616 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:40,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:40,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2021-06-12 20:09:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:40,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350179305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:40,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:40,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:09:40,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869692528] [2021-06-12 20:09:40,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:09:40,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:40,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:09:40,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:09:40,624 INFO L87 Difference]: Start difference. First operand 428 states and 1319 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:40,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:40,766 INFO L93 Difference]: Finished difference Result 661 states and 2002 transitions. [2021-06-12 20:09:40,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:09:40,767 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:09:40,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:40,768 INFO L225 Difference]: With dead ends: 661 [2021-06-12 20:09:40,768 INFO L226 Difference]: Without dead ends: 633 [2021-06-12 20:09:40,768 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:09:40,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-12 20:09:40,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 430. [2021-06-12 20:09:40,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.086247086247086) internal successors, (1324), 429 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:40,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1324 transitions. [2021-06-12 20:09:40,772 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1324 transitions. Word has length 22 [2021-06-12 20:09:40,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:40,772 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1324 transitions. [2021-06-12 20:09:40,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:40,772 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1324 transitions. [2021-06-12 20:09:40,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:09:40,773 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:40,773 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:40,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6456,1118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:40,973 INFO L430 AbstractCegarLoop]: === Iteration 1130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:40,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:40,974 INFO L82 PathProgramCache]: Analyzing trace with hash 127860100, now seen corresponding path program 1118 times [2021-06-12 20:09:40,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:40,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626915675] [2021-06-12 20:09:40,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:41,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:41,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626915675] [2021-06-12 20:09:41,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626915675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:41,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39713362] [2021-06-12 20:09:41,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:41,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:09:41,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:41,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:09:41,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:41,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:09:41,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:41,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:09:41,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:41,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:41,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:41,100 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:25, output treesize:9 [2021-06-12 20:09:41,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:41,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:41,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:41,119 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:41,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:41,125 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:41,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:41,126 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-12 20:09:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:41,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39713362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:41,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:41,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:09:41,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979585957] [2021-06-12 20:09:41,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:09:41,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:41,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:09:41,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:09:41,150 INFO L87 Difference]: Start difference. First operand 430 states and 1324 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:41,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:41,303 INFO L93 Difference]: Finished difference Result 658 states and 1993 transitions. [2021-06-12 20:09:41,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:09:41,303 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:09:41,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:41,304 INFO L225 Difference]: With dead ends: 658 [2021-06-12 20:09:41,304 INFO L226 Difference]: Without dead ends: 624 [2021-06-12 20:09:41,304 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:09:41,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-06-12 20:09:41,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 427. [2021-06-12 20:09:41,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.0938967136150235) internal successors, (1318), 426 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:41,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1318 transitions. [2021-06-12 20:09:41,309 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1318 transitions. Word has length 22 [2021-06-12 20:09:41,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:41,309 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1318 transitions. [2021-06-12 20:09:41,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:41,309 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1318 transitions. [2021-06-12 20:09:41,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:09:41,309 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:41,309 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:41,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6460,1119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:41,510 INFO L430 AbstractCegarLoop]: === Iteration 1131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:41,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:41,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1468978378, now seen corresponding path program 1119 times [2021-06-12 20:09:41,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:41,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565741132] [2021-06-12 20:09:41,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:41,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:41,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:41,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565741132] [2021-06-12 20:09:41,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565741132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:41,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836894012] [2021-06-12 20:09:41,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:41,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:09:41,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:41,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:09:41,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:41,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:09:41,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:41,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:09:41,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:41,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:41,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:41,652 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:31, output treesize:17 [2021-06-12 20:09:41,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:41,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:41,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:41,668 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:41,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:41,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2021-06-12 20:09:41,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:41,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836894012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:41,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:41,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:09:41,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181350206] [2021-06-12 20:09:41,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:09:41,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:41,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:09:41,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:09:41,676 INFO L87 Difference]: Start difference. First operand 427 states and 1318 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:41,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:41,782 INFO L93 Difference]: Finished difference Result 550 states and 1681 transitions. [2021-06-12 20:09:41,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:09:41,783 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:09:41,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:41,783 INFO L225 Difference]: With dead ends: 550 [2021-06-12 20:09:41,783 INFO L226 Difference]: Without dead ends: 522 [2021-06-12 20:09:41,783 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:09:41,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-06-12 20:09:41,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 433. [2021-06-12 20:09:41,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.099537037037037) internal successors, (1339), 432 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:41,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1339 transitions. [2021-06-12 20:09:41,788 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1339 transitions. Word has length 22 [2021-06-12 20:09:41,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:41,788 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1339 transitions. [2021-06-12 20:09:41,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:41,788 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1339 transitions. [2021-06-12 20:09:41,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:09:41,788 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:41,788 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:41,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6465,1120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:41,989 INFO L430 AbstractCegarLoop]: === Iteration 1132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:41,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:41,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1246769766, now seen corresponding path program 1120 times [2021-06-12 20:09:41,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:41,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665654157] [2021-06-12 20:09:41,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:41,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:42,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:42,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665654157] [2021-06-12 20:09:42,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665654157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:42,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238599467] [2021-06-12 20:09:42,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:42,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:09:42,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:42,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:09:42,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:42,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:42,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:42,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:42,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:42,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:09:42,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:42,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:42,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:42,167 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:42,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:42,169 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:42,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:42,170 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:5 [2021-06-12 20:09:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:42,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238599467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:42,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:42,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:09:42,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039331357] [2021-06-12 20:09:42,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:09:42,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:42,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:09:42,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:09:42,177 INFO L87 Difference]: Start difference. First operand 433 states and 1339 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:42,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:42,324 INFO L93 Difference]: Finished difference Result 556 states and 1699 transitions. [2021-06-12 20:09:42,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:09:42,325 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:09:42,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:42,325 INFO L225 Difference]: With dead ends: 556 [2021-06-12 20:09:42,325 INFO L226 Difference]: Without dead ends: 507 [2021-06-12 20:09:42,325 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:09:42,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-06-12 20:09:42,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 433. [2021-06-12 20:09:42,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.0925925925925926) internal successors, (1336), 432 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:42,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1336 transitions. [2021-06-12 20:09:42,330 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1336 transitions. Word has length 22 [2021-06-12 20:09:42,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:42,330 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1336 transitions. [2021-06-12 20:09:42,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:42,330 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1336 transitions. [2021-06-12 20:09:42,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:09:42,330 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:42,330 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:42,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6469,1121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:42,531 INFO L430 AbstractCegarLoop]: === Iteration 1133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:42,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:42,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1139597078, now seen corresponding path program 1121 times [2021-06-12 20:09:42,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:42,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478364988] [2021-06-12 20:09:42,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:42,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:42,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:42,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:42,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478364988] [2021-06-12 20:09:42,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478364988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:42,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876461523] [2021-06-12 20:09:42,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:42,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:09:42,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:42,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:09:42,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:42,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:09:42,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:42,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:09:42,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:42,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:42,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:42,673 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:31, output treesize:17 [2021-06-12 20:09:42,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:42,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:42,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:42,686 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:42,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:42,692 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:42,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:42,692 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-12 20:09:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:42,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876461523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:42,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:42,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:09:42,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94931508] [2021-06-12 20:09:42,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:09:42,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:42,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:09:42,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:09:42,709 INFO L87 Difference]: Start difference. First operand 433 states and 1336 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:42,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:42,828 INFO L93 Difference]: Finished difference Result 574 states and 1753 transitions. [2021-06-12 20:09:42,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:09:42,828 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:09:42,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:42,829 INFO L225 Difference]: With dead ends: 574 [2021-06-12 20:09:42,829 INFO L226 Difference]: Without dead ends: 540 [2021-06-12 20:09:42,829 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:09:42,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-12 20:09:42,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 430. [2021-06-12 20:09:42,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.093240093240093) internal successors, (1327), 429 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:42,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1327 transitions. [2021-06-12 20:09:42,833 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1327 transitions. Word has length 22 [2021-06-12 20:09:42,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:42,833 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1327 transitions. [2021-06-12 20:09:42,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:42,833 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1327 transitions. [2021-06-12 20:09:42,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:09:42,834 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:42,834 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:43,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6473 [2021-06-12 20:09:43,034 INFO L430 AbstractCegarLoop]: === Iteration 1134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:43,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:43,034 INFO L82 PathProgramCache]: Analyzing trace with hash -2025395358, now seen corresponding path program 1122 times [2021-06-12 20:09:43,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:43,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166616174] [2021-06-12 20:09:43,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:43,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:43,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:43,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:43,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166616174] [2021-06-12 20:09:43,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166616174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:43,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434310328] [2021-06-12 20:09:43,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:43,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:09:43,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:43,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:09:43,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:43,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:43,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:43,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:43,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:43,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:09:43,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:43,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:43,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:43,189 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:43,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:43,195 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:43,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:43,196 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-12 20:09:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:43,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434310328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:43,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:43,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:09:43,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788412443] [2021-06-12 20:09:43,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:09:43,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:43,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:09:43,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:09:43,212 INFO L87 Difference]: Start difference. First operand 430 states and 1327 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:43,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:43,354 INFO L93 Difference]: Finished difference Result 553 states and 1690 transitions. [2021-06-12 20:09:43,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:09:43,355 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:09:43,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:43,355 INFO L225 Difference]: With dead ends: 553 [2021-06-12 20:09:43,355 INFO L226 Difference]: Without dead ends: 513 [2021-06-12 20:09:43,355 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:09:43,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-12 20:09:43,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 430. [2021-06-12 20:09:43,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.093240093240093) internal successors, (1327), 429 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:43,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1327 transitions. [2021-06-12 20:09:43,360 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1327 transitions. Word has length 22 [2021-06-12 20:09:43,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:43,360 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1327 transitions. [2021-06-12 20:09:43,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:43,360 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1327 transitions. [2021-06-12 20:09:43,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:09:43,360 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:43,360 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:43,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6478,1123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:43,561 INFO L430 AbstractCegarLoop]: === Iteration 1135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:43,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:43,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1985309254, now seen corresponding path program 1123 times [2021-06-12 20:09:43,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:43,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969515891] [2021-06-12 20:09:43,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:43,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:43,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:43,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:43,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969515891] [2021-06-12 20:09:43,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969515891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:43,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542133427] [2021-06-12 20:09:43,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:43,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:43,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:09:43,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:43,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:09:43,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:43,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:09:43,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:43,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:43,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:43,714 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:31, output treesize:17 [2021-06-12 20:09:43,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:43,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:43,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:43,744 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:43,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:43,746 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:43,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:43,752 INFO L518 ElimStorePlain]: Eliminatee v_prenex_336 vanished before elimination [2021-06-12 20:09:43,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:43,752 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:35, output treesize:13 [2021-06-12 20:09:43,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:43,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542133427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:43,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:43,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:09:43,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366550959] [2021-06-12 20:09:43,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:09:43,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:43,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:09:43,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:09:43,780 INFO L87 Difference]: Start difference. First operand 430 states and 1327 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:43,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:43,965 INFO L93 Difference]: Finished difference Result 592 states and 1798 transitions. [2021-06-12 20:09:43,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:09:43,965 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:09:43,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:43,966 INFO L225 Difference]: With dead ends: 592 [2021-06-12 20:09:43,966 INFO L226 Difference]: Without dead ends: 552 [2021-06-12 20:09:43,966 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 156.1ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:09:43,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-06-12 20:09:43,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 448. [2021-06-12 20:09:43,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 3.102908277404922) internal successors, (1387), 447 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:43,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1387 transitions. [2021-06-12 20:09:43,970 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1387 transitions. Word has length 22 [2021-06-12 20:09:43,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:43,971 INFO L482 AbstractCegarLoop]: Abstraction has 448 states and 1387 transitions. [2021-06-12 20:09:43,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:43,971 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1387 transitions. [2021-06-12 20:09:43,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:09:43,971 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:43,971 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:44,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6482 [2021-06-12 20:09:44,172 INFO L430 AbstractCegarLoop]: === Iteration 1136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:44,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:44,172 INFO L82 PathProgramCache]: Analyzing trace with hash -623266202, now seen corresponding path program 1124 times [2021-06-12 20:09:44,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:44,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3869245] [2021-06-12 20:09:44,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:44,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:44,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:44,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:44,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3869245] [2021-06-12 20:09:44,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3869245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:44,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448589337] [2021-06-12 20:09:44,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:44,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:09:44,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:44,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:09:44,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:44,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:09:44,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:44,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:09:44,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:44,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:44,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:44,329 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:31, output treesize:17 [2021-06-12 20:09:44,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:44,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:44,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:44,361 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:44,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:44,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2021-06-12 20:09:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:44,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448589337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:44,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:44,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:09:44,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227620454] [2021-06-12 20:09:44,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:09:44,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:44,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:09:44,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:09:44,372 INFO L87 Difference]: Start difference. First operand 448 states and 1387 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:44,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:44,501 INFO L93 Difference]: Finished difference Result 547 states and 1663 transitions. [2021-06-12 20:09:44,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:09:44,502 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:09:44,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:44,502 INFO L225 Difference]: With dead ends: 547 [2021-06-12 20:09:44,502 INFO L226 Difference]: Without dead ends: 516 [2021-06-12 20:09:44,502 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:44,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-06-12 20:09:44,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 428. [2021-06-12 20:09:44,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.1053864168618266) internal successors, (1326), 427 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:44,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1326 transitions. [2021-06-12 20:09:44,507 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1326 transitions. Word has length 22 [2021-06-12 20:09:44,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:44,507 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 1326 transitions. [2021-06-12 20:09:44,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:44,507 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1326 transitions. [2021-06-12 20:09:44,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:09:44,507 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:44,507 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:44,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6491,1125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:44,708 INFO L430 AbstractCegarLoop]: === Iteration 1137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:44,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:44,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1196397136, now seen corresponding path program 1125 times [2021-06-12 20:09:44,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:44,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071591648] [2021-06-12 20:09:44,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:44,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:44,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:44,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:44,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071591648] [2021-06-12 20:09:44,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071591648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:44,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499864926] [2021-06-12 20:09:44,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:44,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:09:44,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:44,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:09:44,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:44,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:44,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:44,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:44,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:44,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:09:44,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:44,911 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:09:44,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:44,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:44,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:44,914 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:44,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:44,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:09:44,929 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:93, output treesize:48 [2021-06-12 20:09:45,067 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_339, o_4, v_prenex_340, v_prenex_341, v_prenex_344, v_prenex_345], 1=[v_prenex_338, o_2]} [2021-06-12 20:09:45,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:09:45,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:45,114 INFO L628 ElimStorePlain]: treesize reduction 27, result has 74.5 percent of original size [2021-06-12 20:09:45,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:45,117 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:45,152 INFO L628 ElimStorePlain]: treesize reduction 9, result has 87.5 percent of original size [2021-06-12 20:09:45,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:45,155 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:45,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:45,170 INFO L518 ElimStorePlain]: Eliminatee v_prenex_341 vanished before elimination [2021-06-12 20:09:45,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:45,173 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:45,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:45,186 INFO L518 ElimStorePlain]: Eliminatee v_prenex_345 vanished before elimination [2021-06-12 20:09:45,186 INFO L518 ElimStorePlain]: Eliminatee v_prenex_338 vanished before elimination [2021-06-12 20:09:45,186 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:45,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:09:45,188 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:113, output treesize:13 [2021-06-12 20:09:45,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:45,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499864926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:45,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:45,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:09:45,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907125939] [2021-06-12 20:09:45,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:09:45,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:45,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:09:45,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:09:45,200 INFO L87 Difference]: Start difference. First operand 428 states and 1326 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:45,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:45,471 INFO L93 Difference]: Finished difference Result 583 states and 1723 transitions. [2021-06-12 20:09:45,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:09:45,471 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:09:45,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:45,472 INFO L225 Difference]: With dead ends: 583 [2021-06-12 20:09:45,472 INFO L226 Difference]: Without dead ends: 532 [2021-06-12 20:09:45,472 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 283.9ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:09:45,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-06-12 20:09:45,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 432. [2021-06-12 20:09:45,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.0951276102088165) internal successors, (1334), 431 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:45,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1334 transitions. [2021-06-12 20:09:45,477 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1334 transitions. Word has length 22 [2021-06-12 20:09:45,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:45,477 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 1334 transitions. [2021-06-12 20:09:45,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:45,477 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1334 transitions. [2021-06-12 20:09:45,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:09:45,477 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:45,477 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:45,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6495 [2021-06-12 20:09:45,678 INFO L430 AbstractCegarLoop]: === Iteration 1138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:45,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:45,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1290560944, now seen corresponding path program 1126 times [2021-06-12 20:09:45,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:45,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997662006] [2021-06-12 20:09:45,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:45,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:45,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:45,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997662006] [2021-06-12 20:09:45,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997662006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:45,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723042350] [2021-06-12 20:09:45,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:45,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:09:45,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:45,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:09:45,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:45,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:45,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:45,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:45,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:45,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:09:45,922 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:45,923 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:09:45,923 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:45,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:45,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:45,927 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:45,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:45,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:09:45,943 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:93, output treesize:48 [2021-06-12 20:09:46,097 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_349, o_4, v_prenex_350, v_prenex_353, v_prenex_354, v_prenex_348], 1=[o_2, v_prenex_347]} [2021-06-12 20:09:46,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:46,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:46,142 INFO L628 ElimStorePlain]: treesize reduction 34, result has 67.3 percent of original size [2021-06-12 20:09:46,142 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:46,142 INFO L518 ElimStorePlain]: Eliminatee v_prenex_350 vanished before elimination [2021-06-12 20:09:46,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:46,145 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:46,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:46,162 INFO L518 ElimStorePlain]: Eliminatee v_prenex_354 vanished before elimination [2021-06-12 20:09:46,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:46,164 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:46,192 INFO L628 ElimStorePlain]: treesize reduction 9, result has 80.9 percent of original size [2021-06-12 20:09:46,192 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:46,192 INFO L518 ElimStorePlain]: Eliminatee v_prenex_347 vanished before elimination [2021-06-12 20:09:46,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:09:46,194 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 12 variables, input treesize:113, output treesize:13 [2021-06-12 20:09:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:46,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723042350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:46,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:46,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:09:46,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60133526] [2021-06-12 20:09:46,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:09:46,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:46,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:09:46,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:09:46,206 INFO L87 Difference]: Start difference. First operand 432 states and 1334 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:46,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:46,457 INFO L93 Difference]: Finished difference Result 577 states and 1706 transitions. [2021-06-12 20:09:46,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:09:46,457 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:09:46,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:46,458 INFO L225 Difference]: With dead ends: 577 [2021-06-12 20:09:46,458 INFO L226 Difference]: Without dead ends: 534 [2021-06-12 20:09:46,458 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 296.2ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:09:46,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-12 20:09:46,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 434. [2021-06-12 20:09:46,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.087759815242494) internal successors, (1337), 433 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:46,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1337 transitions. [2021-06-12 20:09:46,462 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1337 transitions. Word has length 22 [2021-06-12 20:09:46,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:46,462 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 1337 transitions. [2021-06-12 20:09:46,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:46,462 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1337 transitions. [2021-06-12 20:09:46,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:09:46,463 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:46,463 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:46,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6509 [2021-06-12 20:09:46,663 INFO L430 AbstractCegarLoop]: === Iteration 1139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:46,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:46,664 INFO L82 PathProgramCache]: Analyzing trace with hash -552021456, now seen corresponding path program 1127 times [2021-06-12 20:09:46,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:46,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111109019] [2021-06-12 20:09:46,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:46,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:46,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111109019] [2021-06-12 20:09:46,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111109019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:46,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31065362] [2021-06-12 20:09:46,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:46,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:09:46,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:46,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:09:46,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:46,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:46,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:46,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:46,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:46,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:46,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:46,872 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:09:46,872 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:46,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:46,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:09:46,875 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:46,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:46,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:09:46,889 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:93, output treesize:48 [2021-06-12 20:09:47,003 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_360, v_prenex_363, v_prenex_357, v_prenex_358, v_prenex_359], 1=[o_2, v_prenex_356]} [2021-06-12 20:09:47,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:09:47,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:47,055 INFO L628 ElimStorePlain]: treesize reduction 33, result has 70.8 percent of original size [2021-06-12 20:09:47,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:47,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:47,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:47,079 INFO L518 ElimStorePlain]: Eliminatee v_prenex_363 vanished before elimination [2021-06-12 20:09:47,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:47,082 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:47,114 INFO L628 ElimStorePlain]: treesize reduction 9, result has 84.2 percent of original size [2021-06-12 20:09:47,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:47,117 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:47,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:47,131 INFO L518 ElimStorePlain]: Eliminatee v_prenex_359 vanished before elimination [2021-06-12 20:09:47,131 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:47,131 INFO L518 ElimStorePlain]: Eliminatee v_prenex_356 vanished before elimination [2021-06-12 20:09:47,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:09:47,133 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:120, output treesize:14 [2021-06-12 20:09:47,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:47,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31065362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:47,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:47,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:09:47,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502361738] [2021-06-12 20:09:47,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:09:47,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:47,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:09:47,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:09:47,150 INFO L87 Difference]: Start difference. First operand 434 states and 1337 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:47,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:47,526 INFO L93 Difference]: Finished difference Result 606 states and 1770 transitions. [2021-06-12 20:09:47,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:09:47,526 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:09:47,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:47,527 INFO L225 Difference]: With dead ends: 606 [2021-06-12 20:09:47,527 INFO L226 Difference]: Without dead ends: 571 [2021-06-12 20:09:47,527 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 358.9ms TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:09:47,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-12 20:09:47,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 446. [2021-06-12 20:09:47,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 3.0719101123595505) internal successors, (1367), 445 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:47,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1367 transitions. [2021-06-12 20:09:47,531 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1367 transitions. Word has length 22 [2021-06-12 20:09:47,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:47,531 INFO L482 AbstractCegarLoop]: Abstraction has 446 states and 1367 transitions. [2021-06-12 20:09:47,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:47,532 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1367 transitions. [2021-06-12 20:09:47,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:09:47,532 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:47,532 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:47,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6529,1128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:47,733 INFO L430 AbstractCegarLoop]: === Iteration 1140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:47,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:47,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1134370384, now seen corresponding path program 1128 times [2021-06-12 20:09:47,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:47,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168934382] [2021-06-12 20:09:47,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:47,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:47,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168934382] [2021-06-12 20:09:47,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168934382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:47,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713696138] [2021-06-12 20:09:47,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:47,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:09:47,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:47,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:09:47,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:47,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:47,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:47,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:47,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:47,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:09:47,964 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:47,965 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:09:47,965 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:47,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:47,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:47,973 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:47,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:47,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:09:47,988 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:93, output treesize:48 [2021-06-12 20:09:48,084 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_370, o_4, v_prenex_371, v_prenex_366, v_prenex_367, v_prenex_368], 1=[o_2, v_prenex_365]} [2021-06-12 20:09:48,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:48,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:48,134 INFO L628 ElimStorePlain]: treesize reduction 40, result has 64.0 percent of original size [2021-06-12 20:09:48,134 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:48,134 INFO L518 ElimStorePlain]: Eliminatee v_prenex_371 vanished before elimination [2021-06-12 20:09:48,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:48,137 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:48,172 INFO L628 ElimStorePlain]: treesize reduction 9, result has 85.9 percent of original size [2021-06-12 20:09:48,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:48,175 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:48,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:48,195 INFO L518 ElimStorePlain]: Eliminatee v_prenex_368 vanished before elimination [2021-06-12 20:09:48,195 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:48,195 INFO L518 ElimStorePlain]: Eliminatee v_prenex_365 vanished before elimination [2021-06-12 20:09:48,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:09:48,197 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 12 variables, input treesize:120, output treesize:14 [2021-06-12 20:09:48,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:48,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713696138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:48,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:48,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:09:48,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843396823] [2021-06-12 20:09:48,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:09:48,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:48,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:09:48,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:09:48,214 INFO L87 Difference]: Start difference. First operand 446 states and 1367 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:48,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:48,559 INFO L93 Difference]: Finished difference Result 580 states and 1707 transitions. [2021-06-12 20:09:48,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:09:48,559 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:09:48,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:48,560 INFO L225 Difference]: With dead ends: 580 [2021-06-12 20:09:48,560 INFO L226 Difference]: Without dead ends: 541 [2021-06-12 20:09:48,560 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 319.4ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:09:48,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-06-12 20:09:48,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 430. [2021-06-12 20:09:48,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.097902097902098) internal successors, (1329), 429 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:48,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1329 transitions. [2021-06-12 20:09:48,564 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1329 transitions. Word has length 22 [2021-06-12 20:09:48,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:48,565 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1329 transitions. [2021-06-12 20:09:48,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:48,565 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1329 transitions. [2021-06-12 20:09:48,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:09:48,565 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:48,565 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:48,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6543 [2021-06-12 20:09:48,766 INFO L430 AbstractCegarLoop]: === Iteration 1141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:48,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:48,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1927027798, now seen corresponding path program 1129 times [2021-06-12 20:09:48,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:48,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933292882] [2021-06-12 20:09:48,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:48,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:48,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933292882] [2021-06-12 20:09:48,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933292882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:48,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004117226] [2021-06-12 20:09:48,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:48,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:09:48,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:48,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:48,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:48,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:48,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:48,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:09:48,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:48,987 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:09:48,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:48,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:48,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:48,991 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:49,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:49,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:09:49,009 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:105, output treesize:58 [2021-06-12 20:09:49,144 INFO L446 ElimStorePlain]: Different costs {0=[o_2, o_4, v_prenex_374, v_prenex_375, v_prenex_377, v_prenex_379], 1=[v_prenex_376, v_prenex_378]} [2021-06-12 20:09:49,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:49,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:49,187 INFO L628 ElimStorePlain]: treesize reduction 34, result has 64.9 percent of original size [2021-06-12 20:09:49,187 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:49,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:49,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:49,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:49,207 INFO L518 ElimStorePlain]: Eliminatee v_prenex_375 vanished before elimination [2021-06-12 20:09:49,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:49,209 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:49,237 INFO L628 ElimStorePlain]: treesize reduction 9, result has 80.9 percent of original size [2021-06-12 20:09:49,237 INFO L518 ElimStorePlain]: Eliminatee v_prenex_379 vanished before elimination [2021-06-12 20:09:49,237 INFO L518 ElimStorePlain]: Eliminatee v_prenex_376 vanished before elimination [2021-06-12 20:09:49,237 INFO L518 ElimStorePlain]: Eliminatee v_prenex_378 vanished before elimination [2021-06-12 20:09:49,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:09:49,239 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 12 variables, input treesize:113, output treesize:13 [2021-06-12 20:09:49,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:49,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004117226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:49,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:49,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:09:49,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246909414] [2021-06-12 20:09:49,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:09:49,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:49,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:09:49,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:09:49,252 INFO L87 Difference]: Start difference. First operand 430 states and 1329 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:49,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:49,531 INFO L93 Difference]: Finished difference Result 522 states and 1575 transitions. [2021-06-12 20:09:49,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:09:49,531 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:09:49,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:49,532 INFO L225 Difference]: With dead ends: 522 [2021-06-12 20:09:49,532 INFO L226 Difference]: Without dead ends: 479 [2021-06-12 20:09:49,532 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 296.9ms TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:09:49,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-06-12 20:09:49,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 434. [2021-06-12 20:09:49,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.087759815242494) internal successors, (1337), 433 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:49,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1337 transitions. [2021-06-12 20:09:49,536 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1337 transitions. Word has length 22 [2021-06-12 20:09:49,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:49,536 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 1337 transitions. [2021-06-12 20:09:49,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:49,536 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1337 transitions. [2021-06-12 20:09:49,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:09:49,537 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:49,537 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:49,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6557,1130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:49,737 INFO L430 AbstractCegarLoop]: === Iteration 1142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:49,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:49,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1188488310, now seen corresponding path program 1130 times [2021-06-12 20:09:49,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:49,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534708509] [2021-06-12 20:09:49,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:49,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:49,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:49,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534708509] [2021-06-12 20:09:49,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534708509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:49,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637301898] [2021-06-12 20:09:49,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:49,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:09:49,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:49,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:09:49,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:49,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:49,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:49,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:49,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:49,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:49,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:49,976 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:09:49,976 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:49,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:49,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:09:49,980 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:49,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:49,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:09:49,998 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:105, output treesize:58 [2021-06-12 20:09:50,059 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_384, v_prenex_385, v_prenex_386, v_prenex_387, v_prenex_388], 1=[o_2, v_prenex_383]} [2021-06-12 20:09:50,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:50,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:50,106 INFO L628 ElimStorePlain]: treesize reduction 49, result has 56.6 percent of original size [2021-06-12 20:09:50,106 INFO L518 ElimStorePlain]: Eliminatee v_prenex_384 vanished before elimination [2021-06-12 20:09:50,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:50,109 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:50,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:50,127 INFO L518 ElimStorePlain]: Eliminatee v_prenex_386 vanished before elimination [2021-06-12 20:09:50,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:50,130 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:50,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:50,144 INFO L518 ElimStorePlain]: Eliminatee v_prenex_388 vanished before elimination [2021-06-12 20:09:50,144 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:50,144 INFO L518 ElimStorePlain]: Eliminatee v_prenex_383 vanished before elimination [2021-06-12 20:09:50,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:09:50,146 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 12 variables, input treesize:120, output treesize:14 [2021-06-12 20:09:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:50,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637301898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:50,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:50,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:09:50,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238179362] [2021-06-12 20:09:50,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:09:50,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:50,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:09:50,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:09:50,163 INFO L87 Difference]: Start difference. First operand 434 states and 1337 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:50,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:50,464 INFO L93 Difference]: Finished difference Result 553 states and 1645 transitions. [2021-06-12 20:09:50,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:09:50,464 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:09:50,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:50,465 INFO L225 Difference]: With dead ends: 553 [2021-06-12 20:09:50,465 INFO L226 Difference]: Without dead ends: 518 [2021-06-12 20:09:50,465 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 324.3ms TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:09:50,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-12 20:09:50,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 446. [2021-06-12 20:09:50,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 3.0719101123595505) internal successors, (1367), 445 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:50,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1367 transitions. [2021-06-12 20:09:50,469 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1367 transitions. Word has length 22 [2021-06-12 20:09:50,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:50,469 INFO L482 AbstractCegarLoop]: Abstraction has 446 states and 1367 transitions. [2021-06-12 20:09:50,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:50,469 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1367 transitions. [2021-06-12 20:09:50,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:09:50,470 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:50,470 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:50,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1131 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6571 [2021-06-12 20:09:50,670 INFO L430 AbstractCegarLoop]: === Iteration 1143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:50,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:50,670 INFO L82 PathProgramCache]: Analyzing trace with hash 497903530, now seen corresponding path program 1131 times [2021-06-12 20:09:50,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:50,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546854099] [2021-06-12 20:09:50,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:50,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:50,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:50,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546854099] [2021-06-12 20:09:50,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546854099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:50,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332472200] [2021-06-12 20:09:50,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:50,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:09:50,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:50,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:09:50,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:50,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:50,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:50,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:09:50,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:50,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:50,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:50,909 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:09:50,909 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:50,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:50,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:50,912 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:50,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:50,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:09:50,931 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:105, output treesize:58 [2021-06-12 20:09:50,992 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_392, v_prenex_393, o_4, v_prenex_395, v_prenex_397], 1=[v_prenex_394, v_prenex_396]} [2021-06-12 20:09:50,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:50,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:51,043 INFO L628 ElimStorePlain]: treesize reduction 40, result has 64.0 percent of original size [2021-06-12 20:09:51,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:51,046 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:51,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:51,064 INFO L518 ElimStorePlain]: Eliminatee v_prenex_393 vanished before elimination [2021-06-12 20:09:51,065 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:51,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:51,067 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:51,099 INFO L628 ElimStorePlain]: treesize reduction 9, result has 81.3 percent of original size [2021-06-12 20:09:51,099 INFO L518 ElimStorePlain]: Eliminatee v_prenex_397 vanished before elimination [2021-06-12 20:09:51,099 INFO L518 ElimStorePlain]: Eliminatee v_prenex_394 vanished before elimination [2021-06-12 20:09:51,099 INFO L518 ElimStorePlain]: Eliminatee v_prenex_396 vanished before elimination [2021-06-12 20:09:51,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:09:51,101 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 12 variables, input treesize:120, output treesize:14 [2021-06-12 20:09:51,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:51,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332472200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:51,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:51,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:09:51,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200529449] [2021-06-12 20:09:51,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:09:51,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:51,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:09:51,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:09:51,118 INFO L87 Difference]: Start difference. First operand 446 states and 1367 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:51,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:51,375 INFO L93 Difference]: Finished difference Result 514 states and 1543 transitions. [2021-06-12 20:09:51,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:09:51,375 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:09:51,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:51,376 INFO L225 Difference]: With dead ends: 514 [2021-06-12 20:09:51,376 INFO L226 Difference]: Without dead ends: 477 [2021-06-12 20:09:51,376 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 272.2ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:09:51,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-06-12 20:09:51,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 432. [2021-06-12 20:09:51,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.0904872389791183) internal successors, (1332), 431 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:51,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1332 transitions. [2021-06-12 20:09:51,380 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1332 transitions. Word has length 22 [2021-06-12 20:09:51,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:51,380 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 1332 transitions. [2021-06-12 20:09:51,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:51,380 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1332 transitions. [2021-06-12 20:09:51,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:09:51,381 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:51,381 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:51,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6585,1132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:51,581 INFO L430 AbstractCegarLoop]: === Iteration 1144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:51,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:51,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1416536082, now seen corresponding path program 1132 times [2021-06-12 20:09:51,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:51,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649489368] [2021-06-12 20:09:51,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:51,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:51,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649489368] [2021-06-12 20:09:51,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649489368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:51,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098539794] [2021-06-12 20:09:51,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:51,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:09:51,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:51,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:09:51,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:51,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:51,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:51,785 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:09:51,785 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:51,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:09:51,789 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:51,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:51,792 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:51,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:51,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:09:51,814 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:57 [2021-06-12 20:09:51,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:51,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:51,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:51,879 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:51,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:51,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:51,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:09:51,883 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:51,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:51,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:51,886 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:51,905 INFO L628 ElimStorePlain]: treesize reduction 42, result has 26.3 percent of original size [2021-06-12 20:09:51,905 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:51,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:09:51,906 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:97, output treesize:6 [2021-06-12 20:09:51,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:51,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098539794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:51,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:51,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:09:51,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432552383] [2021-06-12 20:09:51,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:09:51,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:51,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:09:51,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:09:51,922 INFO L87 Difference]: Start difference. First operand 432 states and 1332 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:52,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:52,248 INFO L93 Difference]: Finished difference Result 557 states and 1654 transitions. [2021-06-12 20:09:52,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:09:52,248 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:09:52,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:52,249 INFO L225 Difference]: With dead ends: 557 [2021-06-12 20:09:52,249 INFO L226 Difference]: Without dead ends: 522 [2021-06-12 20:09:52,249 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 338.4ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:09:52,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-06-12 20:09:52,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 448. [2021-06-12 20:09:52,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 3.0738255033557045) internal successors, (1374), 447 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:52,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1374 transitions. [2021-06-12 20:09:52,253 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1374 transitions. Word has length 22 [2021-06-12 20:09:52,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:52,253 INFO L482 AbstractCegarLoop]: Abstraction has 448 states and 1374 transitions. [2021-06-12 20:09:52,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:52,254 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1374 transitions. [2021-06-12 20:09:52,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:09:52,254 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:52,254 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:52,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6605,1133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:52,455 INFO L430 AbstractCegarLoop]: === Iteration 1145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:52,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:52,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1192039374, now seen corresponding path program 1133 times [2021-06-12 20:09:52,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:52,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079031158] [2021-06-12 20:09:52,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:52,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:52,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079031158] [2021-06-12 20:09:52,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079031158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:52,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800457379] [2021-06-12 20:09:52,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:52,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:09:52,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:52,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:52,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:52,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:09:52,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:52,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:52,643 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:52,660 INFO L628 ElimStorePlain]: treesize reduction 2, result has 93.3 percent of original size [2021-06-12 20:09:52,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:52,661 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:53, output treesize:28 [2021-06-12 20:09:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:52,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800457379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:52,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:52,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:09:52,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956630630] [2021-06-12 20:09:52,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:09:52,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:52,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:09:52,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:52,722 INFO L87 Difference]: Start difference. First operand 448 states and 1374 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:53,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:53,122 INFO L93 Difference]: Finished difference Result 528 states and 1569 transitions. [2021-06-12 20:09:53,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:09:53,123 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:09:53,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:53,123 INFO L225 Difference]: With dead ends: 528 [2021-06-12 20:09:53,123 INFO L226 Difference]: Without dead ends: 520 [2021-06-12 20:09:53,124 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 402.6ms TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:09:53,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-12 20:09:53,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 446. [2021-06-12 20:09:53,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 3.0719101123595505) internal successors, (1367), 445 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:53,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1367 transitions. [2021-06-12 20:09:53,128 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1367 transitions. Word has length 22 [2021-06-12 20:09:53,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:53,128 INFO L482 AbstractCegarLoop]: Abstraction has 446 states and 1367 transitions. [2021-06-12 20:09:53,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:53,128 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1367 transitions. [2021-06-12 20:09:53,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:09:53,129 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:53,129 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:53,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6612 [2021-06-12 20:09:53,329 INFO L430 AbstractCegarLoop]: === Iteration 1146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:53,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:53,329 INFO L82 PathProgramCache]: Analyzing trace with hash -2077837654, now seen corresponding path program 1134 times [2021-06-12 20:09:53,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:53,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43271491] [2021-06-12 20:09:53,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:53,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:53,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:53,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43271491] [2021-06-12 20:09:53,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43271491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:53,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324476336] [2021-06-12 20:09:53,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:53,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:09:53,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:53,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:09:53,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:53,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:53,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:53,527 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:09:53,527 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:53,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:09:53,530 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:53,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:53,532 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:53,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:53,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:09:53,548 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:57 [2021-06-12 20:09:53,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:53,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:53,624 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:09:53,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:53,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:53,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:53,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:53,628 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:53,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:53,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:09:53,631 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:53,644 INFO L628 ElimStorePlain]: treesize reduction 34, result has 29.2 percent of original size [2021-06-12 20:09:53,644 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:09:53,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:53,645 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:93, output treesize:5 [2021-06-12 20:09:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:53,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324476336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:53,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:53,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:09:53,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757852087] [2021-06-12 20:09:53,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:09:53,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:53,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:09:53,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:09:53,660 INFO L87 Difference]: Start difference. First operand 446 states and 1367 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:54,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:54,024 INFO L93 Difference]: Finished difference Result 520 states and 1557 transitions. [2021-06-12 20:09:54,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:09:54,024 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:09:54,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:54,025 INFO L225 Difference]: With dead ends: 520 [2021-06-12 20:09:54,025 INFO L226 Difference]: Without dead ends: 475 [2021-06-12 20:09:54,025 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 437.8ms TimeCoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:09:54,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-12 20:09:54,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 428. [2021-06-12 20:09:54,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.1030444964871196) internal successors, (1325), 427 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:54,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1325 transitions. [2021-06-12 20:09:54,029 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1325 transitions. Word has length 22 [2021-06-12 20:09:54,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:54,029 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 1325 transitions. [2021-06-12 20:09:54,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:54,029 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1325 transitions. [2021-06-12 20:09:54,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:09:54,030 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:54,030 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:54,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6619,1135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:54,230 INFO L430 AbstractCegarLoop]: === Iteration 1147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:54,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:54,230 INFO L82 PathProgramCache]: Analyzing trace with hash 532418614, now seen corresponding path program 1135 times [2021-06-12 20:09:54,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:54,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670428777] [2021-06-12 20:09:54,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:54,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:54,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:54,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670428777] [2021-06-12 20:09:54,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670428777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:54,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074530236] [2021-06-12 20:09:54,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:54,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:09:54,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:54,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:54,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:54,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:09:54,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:54,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:09:54,371 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:54,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:09:54,373 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:54,394 INFO L628 ElimStorePlain]: treesize reduction 3, result has 90.3 percent of original size [2021-06-12 20:09:54,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 3 xjuncts. [2021-06-12 20:09:54,396 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:53, output treesize:19 [2021-06-12 20:09:54,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:54,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:54,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:54,423 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:54,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:54,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2021-06-12 20:09:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:54,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074530236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:54,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:54,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:09:54,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067830828] [2021-06-12 20:09:54,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:09:54,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:54,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:09:54,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:09:54,432 INFO L87 Difference]: Start difference. First operand 428 states and 1325 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:54,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:54,547 INFO L93 Difference]: Finished difference Result 900 states and 2746 transitions. [2021-06-12 20:09:54,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:09:54,548 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:09:54,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:54,549 INFO L225 Difference]: With dead ends: 900 [2021-06-12 20:09:54,549 INFO L226 Difference]: Without dead ends: 872 [2021-06-12 20:09:54,549 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:09:54,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-06-12 20:09:54,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 436. [2021-06-12 20:09:54,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 3.1241379310344826) internal successors, (1359), 435 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:54,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1359 transitions. [2021-06-12 20:09:54,554 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1359 transitions. Word has length 22 [2021-06-12 20:09:54,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:54,554 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 1359 transitions. [2021-06-12 20:09:54,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:54,554 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1359 transitions. [2021-06-12 20:09:54,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:09:54,555 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:54,555 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:54,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6626 [2021-06-12 20:09:54,755 INFO L430 AbstractCegarLoop]: === Iteration 1148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:54,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:54,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1489183736, now seen corresponding path program 1136 times [2021-06-12 20:09:54,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:54,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044271002] [2021-06-12 20:09:54,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:54,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:54,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:54,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044271002] [2021-06-12 20:09:54,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044271002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:54,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226873066] [2021-06-12 20:09:54,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:54,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:09:54,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:54,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:09:54,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:54,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:54,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:54,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:54,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:54,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:54,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:54,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:54,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:09:54,906 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:29 [2021-06-12 20:09:54,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:54,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:54,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:54,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:54,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:54,944 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:54,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:54,944 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:5 [2021-06-12 20:09:54,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:54,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226873066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:54,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:54,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:09:54,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882739105] [2021-06-12 20:09:54,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:09:54,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:54,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:09:54,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:09:54,951 INFO L87 Difference]: Start difference. First operand 436 states and 1359 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:55,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:55,130 INFO L93 Difference]: Finished difference Result 772 states and 2348 transitions. [2021-06-12 20:09:55,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:09:55,130 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:09:55,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:55,131 INFO L225 Difference]: With dead ends: 772 [2021-06-12 20:09:55,131 INFO L226 Difference]: Without dead ends: 714 [2021-06-12 20:09:55,131 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:09:55,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-06-12 20:09:55,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 439. [2021-06-12 20:09:55,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 3.1073059360730593) internal successors, (1361), 438 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:55,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1361 transitions. [2021-06-12 20:09:55,136 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1361 transitions. Word has length 22 [2021-06-12 20:09:55,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:55,136 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1361 transitions. [2021-06-12 20:09:55,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:55,136 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1361 transitions. [2021-06-12 20:09:55,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:09:55,137 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:55,137 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:55,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6637,1137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:55,337 INFO L430 AbstractCegarLoop]: === Iteration 1149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:55,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:55,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1410281578, now seen corresponding path program 1137 times [2021-06-12 20:09:55,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:55,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996561927] [2021-06-12 20:09:55,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:55,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:55,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:55,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996561927] [2021-06-12 20:09:55,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996561927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:55,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525993708] [2021-06-12 20:09:55,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:55,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:09:55,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:55,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:09:55,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:55,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:09:55,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:55,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:09:55,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:55,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:09:55,461 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:55,469 INFO L628 ElimStorePlain]: treesize reduction 3, result has 76.9 percent of original size [2021-06-12 20:09:55,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:09:55,470 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:37, output treesize:10 [2021-06-12 20:09:55,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:55,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:55,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:55,501 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:55,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:09:55,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2021-06-12 20:09:55,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:55,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525993708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:55,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:55,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:09:55,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193335554] [2021-06-12 20:09:55,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:09:55,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:55,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:09:55,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:09:55,509 INFO L87 Difference]: Start difference. First operand 439 states and 1361 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:55,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:55,617 INFO L93 Difference]: Finished difference Result 840 states and 2569 transitions. [2021-06-12 20:09:55,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:09:55,617 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:09:55,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:55,618 INFO L225 Difference]: With dead ends: 840 [2021-06-12 20:09:55,618 INFO L226 Difference]: Without dead ends: 812 [2021-06-12 20:09:55,618 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:09:55,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-06-12 20:09:55,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 445. [2021-06-12 20:09:55,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 3.1126126126126126) internal successors, (1382), 444 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:55,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1382 transitions. [2021-06-12 20:09:55,624 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1382 transitions. Word has length 22 [2021-06-12 20:09:55,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:55,624 INFO L482 AbstractCegarLoop]: Abstraction has 445 states and 1382 transitions. [2021-06-12 20:09:55,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:55,624 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1382 transitions. [2021-06-12 20:09:55,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:09:55,625 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:55,625 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:55,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6643,1138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:55,825 INFO L430 AbstractCegarLoop]: === Iteration 1150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:55,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:55,825 INFO L82 PathProgramCache]: Analyzing trace with hash 276110262, now seen corresponding path program 1138 times [2021-06-12 20:09:55,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:55,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441702449] [2021-06-12 20:09:55,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:55,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:55,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441702449] [2021-06-12 20:09:55,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441702449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:55,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652337782] [2021-06-12 20:09:55,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:55,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:09:55,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:55,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:09:55,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:55,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:55,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:55,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:09:55,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:55,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:09:56,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:56,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:09:56,003 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:56,023 INFO L628 ElimStorePlain]: treesize reduction 3, result has 90.3 percent of original size [2021-06-12 20:09:56,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 3 xjuncts. [2021-06-12 20:09:56,025 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:53, output treesize:19 [2021-06-12 20:09:56,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:56,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:56,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:56,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:56,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:56,061 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:56,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:09:56,062 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-12 20:09:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:56,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652337782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:56,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:56,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:09:56,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658674944] [2021-06-12 20:09:56,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:09:56,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:56,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:09:56,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:09:56,089 INFO L87 Difference]: Start difference. First operand 445 states and 1382 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:56,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:56,286 INFO L93 Difference]: Finished difference Result 882 states and 2686 transitions. [2021-06-12 20:09:56,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:09:56,287 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:09:56,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:56,288 INFO L225 Difference]: With dead ends: 882 [2021-06-12 20:09:56,288 INFO L226 Difference]: Without dead ends: 848 [2021-06-12 20:09:56,288 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 138.3ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:56,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2021-06-12 20:09:56,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 448. [2021-06-12 20:09:56,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 3.1185682326621924) internal successors, (1394), 447 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:56,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1394 transitions. [2021-06-12 20:09:56,294 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1394 transitions. Word has length 22 [2021-06-12 20:09:56,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:56,294 INFO L482 AbstractCegarLoop]: Abstraction has 448 states and 1394 transitions. [2021-06-12 20:09:56,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:56,294 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1394 transitions. [2021-06-12 20:09:56,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:09:56,294 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:56,294 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:56,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6649,1139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:56,495 INFO L430 AbstractCegarLoop]: === Iteration 1151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:56,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:56,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1130239694, now seen corresponding path program 1139 times [2021-06-12 20:09:56,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:56,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315366559] [2021-06-12 20:09:56,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:56,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:56,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:56,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315366559] [2021-06-12 20:09:56,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315366559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:56,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894092892] [2021-06-12 20:09:56,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:56,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:09:56,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:56,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:09:56,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:56,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:56,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:56,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:09:56,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:56,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:56,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:56,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:09:56,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:56,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:56,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:56,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:09:56,684 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:56,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:56,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:56,687 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:56,739 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.2 percent of original size [2021-06-12 20:09:56,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-12 20:09:56,743 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:121, output treesize:72 [2021-06-12 20:09:56,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:56,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894092892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:56,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:56,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:09:56,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279035704] [2021-06-12 20:09:56,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:09:56,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:56,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:09:56,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:09:56,875 INFO L87 Difference]: Start difference. First operand 448 states and 1394 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:57,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:57,593 INFO L93 Difference]: Finished difference Result 834 states and 2394 transitions. [2021-06-12 20:09:57,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:09:57,593 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:09:57,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:57,594 INFO L225 Difference]: With dead ends: 834 [2021-06-12 20:09:57,594 INFO L226 Difference]: Without dead ends: 759 [2021-06-12 20:09:57,595 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 672.3ms TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:09:57,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-06-12 20:09:57,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 452. [2021-06-12 20:09:57,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.108647450110865) internal successors, (1402), 451 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:57,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1402 transitions. [2021-06-12 20:09:57,600 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1402 transitions. Word has length 22 [2021-06-12 20:09:57,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:57,600 INFO L482 AbstractCegarLoop]: Abstraction has 452 states and 1402 transitions. [2021-06-12 20:09:57,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:57,600 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1402 transitions. [2021-06-12 20:09:57,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:09:57,601 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:57,601 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:57,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6661 [2021-06-12 20:09:57,801 INFO L430 AbstractCegarLoop]: === Iteration 1152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:57,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:57,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1036075886, now seen corresponding path program 1140 times [2021-06-12 20:09:57,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:57,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543138975] [2021-06-12 20:09:57,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:57,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:57,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543138975] [2021-06-12 20:09:57,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543138975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:57,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129694064] [2021-06-12 20:09:57,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:57,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:09:57,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:09:57,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:09:57,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:57,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:57,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:57,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:57,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:57,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:57,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:57,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:57,983 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:57,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:57,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:57,986 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:58,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:58,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-06-12 20:09:58,014 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:105, output treesize:73 [2021-06-12 20:09:58,253 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_405, v_prenex_406, o_2, v_prenex_408, o_4, v_prenex_411], 1=[v_prenex_407, v_prenex_410]} [2021-06-12 20:09:58,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:58,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:58,298 INFO L628 ElimStorePlain]: treesize reduction 34, result has 67.3 percent of original size [2021-06-12 20:09:58,298 INFO L518 ElimStorePlain]: Eliminatee v_prenex_406 vanished before elimination [2021-06-12 20:09:58,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:58,301 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:58,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:58,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:58,321 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:58,348 INFO L628 ElimStorePlain]: treesize reduction 9, result has 80.9 percent of original size [2021-06-12 20:09:58,348 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:58,348 INFO L518 ElimStorePlain]: Eliminatee v_prenex_411 vanished before elimination [2021-06-12 20:09:58,348 INFO L518 ElimStorePlain]: Eliminatee v_prenex_407 vanished before elimination [2021-06-12 20:09:58,348 INFO L518 ElimStorePlain]: Eliminatee v_prenex_410 vanished before elimination [2021-06-12 20:09:58,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:09:58,350 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 12 variables, input treesize:113, output treesize:13 [2021-06-12 20:09:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:58,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129694064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:58,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:58,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:09:58,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139239334] [2021-06-12 20:09:58,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:09:58,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:58,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:09:58,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:09:58,363 INFO L87 Difference]: Start difference. First operand 452 states and 1402 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:58,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:09:58,894 INFO L93 Difference]: Finished difference Result 715 states and 2116 transitions. [2021-06-12 20:09:58,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:09:58,894 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:09:58,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:09:58,895 INFO L225 Difference]: With dead ends: 715 [2021-06-12 20:09:58,895 INFO L226 Difference]: Without dead ends: 672 [2021-06-12 20:09:58,895 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 568.1ms TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:09:58,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-12 20:09:58,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 456. [2021-06-12 20:09:58,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.098901098901099) internal successors, (1410), 455 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:58,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1410 transitions. [2021-06-12 20:09:58,905 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1410 transitions. Word has length 22 [2021-06-12 20:09:58,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:09:58,905 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1410 transitions. [2021-06-12 20:09:58,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:09:58,905 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1410 transitions. [2021-06-12 20:09:58,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:09:58,906 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:09:58,906 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:09:59,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6676,1141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:59,106 INFO L430 AbstractCegarLoop]: === Iteration 1153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:09:59,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:09:59,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1774615374, now seen corresponding path program 1141 times [2021-06-12 20:09:59,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:09:59,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972018781] [2021-06-12 20:09:59,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:09:59,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:59,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:59,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:09:59,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972018781] [2021-06-12 20:09:59,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972018781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:59,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471005844] [2021-06-12 20:09:59,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:09:59,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:09:59,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:09:59,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:09:59,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:59,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:59,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:59,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:59,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:59,284 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:59,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:59,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:09:59,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:59,288 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:59,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:59,291 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:59,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:59,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-06-12 20:09:59,318 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:105, output treesize:73 [2021-06-12 20:09:59,505 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_416, v_prenex_417, o_2, v_prenex_419, o_4, v_prenex_421], 1=[v_prenex_418, v_prenex_420]} [2021-06-12 20:09:59,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:09:59,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:59,555 INFO L628 ElimStorePlain]: treesize reduction 40, result has 64.0 percent of original size [2021-06-12 20:09:59,555 INFO L518 ElimStorePlain]: Eliminatee v_prenex_417 vanished before elimination [2021-06-12 20:09:59,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:59,558 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:59,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:09:59,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:09:59,579 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:09:59,608 INFO L628 ElimStorePlain]: treesize reduction 9, result has 81.3 percent of original size [2021-06-12 20:09:59,608 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:09:59,609 INFO L518 ElimStorePlain]: Eliminatee v_prenex_421 vanished before elimination [2021-06-12 20:09:59,609 INFO L518 ElimStorePlain]: Eliminatee v_prenex_418 vanished before elimination [2021-06-12 20:09:59,609 INFO L518 ElimStorePlain]: Eliminatee v_prenex_420 vanished before elimination [2021-06-12 20:09:59,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:09:59,610 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 12 variables, input treesize:120, output treesize:14 [2021-06-12 20:09:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:09:59,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471005844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:09:59,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:09:59,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:09:59,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588824259] [2021-06-12 20:09:59,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:09:59,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:09:59,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:09:59,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:09:59,627 INFO L87 Difference]: Start difference. First operand 456 states and 1410 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:00,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:00,271 INFO L93 Difference]: Finished difference Result 781 states and 2264 transitions. [2021-06-12 20:10:00,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:10:00,271 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:10:00,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:00,272 INFO L225 Difference]: With dead ends: 781 [2021-06-12 20:10:00,272 INFO L226 Difference]: Without dead ends: 746 [2021-06-12 20:10:00,272 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 687.9ms TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:10:00,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2021-06-12 20:10:00,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 472. [2021-06-12 20:10:00,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.0870488322717624) internal successors, (1454), 471 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:00,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1454 transitions. [2021-06-12 20:10:00,278 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1454 transitions. Word has length 22 [2021-06-12 20:10:00,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:00,278 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1454 transitions. [2021-06-12 20:10:00,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:00,278 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1454 transitions. [2021-06-12 20:10:00,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:10:00,279 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:00,279 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:00,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6691 [2021-06-12 20:10:00,479 INFO L430 AbstractCegarLoop]: === Iteration 1154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:00,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:00,479 INFO L82 PathProgramCache]: Analyzing trace with hash -833960082, now seen corresponding path program 1142 times [2021-06-12 20:10:00,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:00,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677526895] [2021-06-12 20:10:00,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:00,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:00,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677526895] [2021-06-12 20:10:00,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677526895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:00,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897518762] [2021-06-12 20:10:00,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:00,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:10:00,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:00,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:10:00,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:00,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:00,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:00,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:00,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:00,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:00,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:00,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:00,655 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:00,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:00,658 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:00,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:00,661 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:00,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:00,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-06-12 20:10:00,689 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:105, output treesize:73 [2021-06-12 20:10:00,866 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_427, v_prenex_428, o_2, o_4, v_prenex_430, v_prenex_433], 1=[v_prenex_429, v_prenex_432]} [2021-06-12 20:10:00,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:00,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:00,915 INFO L628 ElimStorePlain]: treesize reduction 40, result has 64.0 percent of original size [2021-06-12 20:10:00,915 INFO L518 ElimStorePlain]: Eliminatee v_prenex_428 vanished before elimination [2021-06-12 20:10:00,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:00,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:00,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:00,936 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:10:00,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:00,939 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:00,968 INFO L628 ElimStorePlain]: treesize reduction 9, result has 81.3 percent of original size [2021-06-12 20:10:00,969 INFO L518 ElimStorePlain]: Eliminatee v_prenex_433 vanished before elimination [2021-06-12 20:10:00,969 INFO L518 ElimStorePlain]: Eliminatee v_prenex_429 vanished before elimination [2021-06-12 20:10:00,969 INFO L518 ElimStorePlain]: Eliminatee v_prenex_432 vanished before elimination [2021-06-12 20:10:00,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:10:00,970 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 12 variables, input treesize:120, output treesize:14 [2021-06-12 20:10:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:00,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897518762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:00,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:00,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:10:00,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414741845] [2021-06-12 20:10:00,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:10:00,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:00,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:10:00,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:10:00,987 INFO L87 Difference]: Start difference. First operand 472 states and 1454 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:01,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:01,462 INFO L93 Difference]: Finished difference Result 744 states and 2166 transitions. [2021-06-12 20:10:01,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:10:01,462 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:10:01,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:01,463 INFO L225 Difference]: With dead ends: 744 [2021-06-12 20:10:01,463 INFO L226 Difference]: Without dead ends: 705 [2021-06-12 20:10:01,463 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 541.9ms TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:10:01,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-06-12 20:10:01,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 456. [2021-06-12 20:10:01,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.10989010989011) internal successors, (1415), 455 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:01,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1415 transitions. [2021-06-12 20:10:01,469 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1415 transitions. Word has length 22 [2021-06-12 20:10:01,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:01,469 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1415 transitions. [2021-06-12 20:10:01,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:01,469 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1415 transitions. [2021-06-12 20:10:01,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:10:01,469 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:01,469 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:01,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6708 [2021-06-12 20:10:01,670 INFO L430 AbstractCegarLoop]: === Iteration 1155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:01,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:01,670 INFO L82 PathProgramCache]: Analyzing trace with hash -848272444, now seen corresponding path program 1143 times [2021-06-12 20:10:01,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:01,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203487345] [2021-06-12 20:10:01,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:01,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:01,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:01,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:01,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203487345] [2021-06-12 20:10:01,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203487345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:01,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159163864] [2021-06-12 20:10:01,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:01,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:10:01,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:01,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:10:01,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:01,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:01,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:01,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:10:01,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:01,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:10:01,819 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:01,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:10:01,822 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:01,843 INFO L628 ElimStorePlain]: treesize reduction 3, result has 90.3 percent of original size [2021-06-12 20:10:01,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 3 xjuncts. [2021-06-12 20:10:01,844 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:53, output treesize:19 [2021-06-12 20:10:01,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:01,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:01,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:01,871 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:10:01,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:10:01,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2021-06-12 20:10:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:01,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159163864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:01,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:01,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:10:01,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642023037] [2021-06-12 20:10:01,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:10:01,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:01,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:10:01,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:10:01,880 INFO L87 Difference]: Start difference. First operand 456 states and 1415 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:02,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:02,003 INFO L93 Difference]: Finished difference Result 862 states and 2592 transitions. [2021-06-12 20:10:02,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:10:02,004 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:10:02,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:02,005 INFO L225 Difference]: With dead ends: 862 [2021-06-12 20:10:02,005 INFO L226 Difference]: Without dead ends: 834 [2021-06-12 20:10:02,005 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:10:02,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-06-12 20:10:02,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 448. [2021-06-12 20:10:02,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 3.087248322147651) internal successors, (1380), 447 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:02,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1380 transitions. [2021-06-12 20:10:02,011 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1380 transitions. Word has length 22 [2021-06-12 20:10:02,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:02,011 INFO L482 AbstractCegarLoop]: Abstraction has 448 states and 1380 transitions. [2021-06-12 20:10:02,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:02,011 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1380 transitions. [2021-06-12 20:10:02,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:10:02,012 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:02,012 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:02,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6723,1144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:02,212 INFO L430 AbstractCegarLoop]: === Iteration 1156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:02,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:02,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1981296144, now seen corresponding path program 1144 times [2021-06-12 20:10:02,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:02,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567405247] [2021-06-12 20:10:02,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:02,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:02,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:02,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567405247] [2021-06-12 20:10:02,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567405247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:02,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564388990] [2021-06-12 20:10:02,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:02,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:10:02,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:02,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:10:02,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:02,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:02,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:02,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:02,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:02,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:02,406 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:02,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:02,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:02,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:02,409 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:02,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:02,412 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:02,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:02,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-06-12 20:10:02,441 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:105, output treesize:73 [2021-06-12 20:10:02,718 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_442, v_prenex_443, v_prenex_444, v_prenex_445, v_prenex_447], 1=[o_2, v_prenex_441]} [2021-06-12 20:10:02,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:10:02,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:02,766 INFO L628 ElimStorePlain]: treesize reduction 27, result has 74.5 percent of original size [2021-06-12 20:10:02,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:02,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:02,805 INFO L628 ElimStorePlain]: treesize reduction 9, result has 87.5 percent of original size [2021-06-12 20:10:02,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:02,808 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:02,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:02,824 INFO L518 ElimStorePlain]: Eliminatee v_prenex_444 vanished before elimination [2021-06-12 20:10:02,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:02,827 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:02,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:02,841 INFO L518 ElimStorePlain]: Eliminatee v_prenex_447 vanished before elimination [2021-06-12 20:10:02,842 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:10:02,842 INFO L518 ElimStorePlain]: Eliminatee v_prenex_441 vanished before elimination [2021-06-12 20:10:02,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:10:02,843 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:113, output treesize:13 [2021-06-12 20:10:02,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:02,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564388990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:02,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:02,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:10:02,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067359703] [2021-06-12 20:10:02,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:10:02,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:02,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:10:02,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:10:02,856 INFO L87 Difference]: Start difference. First operand 448 states and 1380 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:03,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:03,237 INFO L93 Difference]: Finished difference Result 685 states and 2013 transitions. [2021-06-12 20:10:03,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:10:03,237 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:10:03,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:03,238 INFO L225 Difference]: With dead ends: 685 [2021-06-12 20:10:03,238 INFO L226 Difference]: Without dead ends: 634 [2021-06-12 20:10:03,238 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 531.1ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:10:03,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-06-12 20:10:03,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 436. [2021-06-12 20:10:03,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 3.094252873563218) internal successors, (1346), 435 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:03,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1346 transitions. [2021-06-12 20:10:03,244 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1346 transitions. Word has length 22 [2021-06-12 20:10:03,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:03,244 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 1346 transitions. [2021-06-12 20:10:03,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:03,244 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1346 transitions. [2021-06-12 20:10:03,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:10:03,245 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:03,245 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:03,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6736,1145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:03,445 INFO L430 AbstractCegarLoop]: === Iteration 1157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:03,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:03,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1764558538, now seen corresponding path program 1145 times [2021-06-12 20:10:03,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:03,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351246840] [2021-06-12 20:10:03,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:03,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:03,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351246840] [2021-06-12 20:10:03,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351246840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:03,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475572197] [2021-06-12 20:10:03,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:03,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:10:03,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:03,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:10:03,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:03,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:10:03,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:03,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:10:03,571 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:03,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:10:03,573 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:03,581 INFO L628 ElimStorePlain]: treesize reduction 3, result has 76.9 percent of original size [2021-06-12 20:10:03,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:10:03,582 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:37, output treesize:10 [2021-06-12 20:10:03,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:03,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:03,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:03,604 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:10:03,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:10:03,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2021-06-12 20:10:03,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:03,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475572197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:03,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:03,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:10:03,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332661456] [2021-06-12 20:10:03,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:10:03,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:03,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:10:03,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:10:03,612 INFO L87 Difference]: Start difference. First operand 436 states and 1346 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:03,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:03,735 INFO L93 Difference]: Finished difference Result 776 states and 2355 transitions. [2021-06-12 20:10:03,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:10:03,736 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:10:03,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:03,737 INFO L225 Difference]: With dead ends: 776 [2021-06-12 20:10:03,737 INFO L226 Difference]: Without dead ends: 748 [2021-06-12 20:10:03,737 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:10:03,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-06-12 20:10:03,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 440. [2021-06-12 20:10:03,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 3.10250569476082) internal successors, (1362), 439 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1362 transitions. [2021-06-12 20:10:03,742 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1362 transitions. Word has length 22 [2021-06-12 20:10:03,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:03,742 INFO L482 AbstractCegarLoop]: Abstraction has 440 states and 1362 transitions. [2021-06-12 20:10:03,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:03,742 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1362 transitions. [2021-06-12 20:10:03,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:10:03,743 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:03,743 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:03,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6751 [2021-06-12 20:10:03,943 INFO L430 AbstractCegarLoop]: === Iteration 1158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:03,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:03,944 INFO L82 PathProgramCache]: Analyzing trace with hash -2106336848, now seen corresponding path program 1146 times [2021-06-12 20:10:03,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:03,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517797876] [2021-06-12 20:10:03,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:04,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:04,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:04,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517797876] [2021-06-12 20:10:04,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517797876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:04,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922974904] [2021-06-12 20:10:04,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:04,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:10:04,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:04,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:10:04,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:04,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:04,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:04,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:10:04,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:04,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:04,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:04,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:04,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:04,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:04,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:04,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:10:04,160 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:04,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:04,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:10:04,163 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:04,215 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.2 percent of original size [2021-06-12 20:10:04,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-12 20:10:04,218 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:121, output treesize:72 [2021-06-12 20:10:04,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:04,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922974904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:04,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:04,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:10:04,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319153272] [2021-06-12 20:10:04,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:10:04,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:04,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:10:04,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:10:04,388 INFO L87 Difference]: Start difference. First operand 440 states and 1362 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:05,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:05,243 INFO L93 Difference]: Finished difference Result 673 states and 1990 transitions. [2021-06-12 20:10:05,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:10:05,243 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:10:05,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:05,244 INFO L225 Difference]: With dead ends: 673 [2021-06-12 20:10:05,244 INFO L226 Difference]: Without dead ends: 649 [2021-06-12 20:10:05,244 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 794.9ms TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:10:05,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-06-12 20:10:05,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 440. [2021-06-12 20:10:05,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 3.093394077448747) internal successors, (1358), 439 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:05,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1358 transitions. [2021-06-12 20:10:05,249 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1358 transitions. Word has length 22 [2021-06-12 20:10:05,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:05,249 INFO L482 AbstractCegarLoop]: Abstraction has 440 states and 1358 transitions. [2021-06-12 20:10:05,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:05,250 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1358 transitions. [2021-06-12 20:10:05,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:10:05,250 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:05,250 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:05,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6757,1147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:05,450 INFO L430 AbstractCegarLoop]: === Iteration 1159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:05,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:05,451 INFO L82 PathProgramCache]: Analyzing trace with hash -649655820, now seen corresponding path program 1147 times [2021-06-12 20:10:05,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:05,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987620605] [2021-06-12 20:10:05,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:05,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:05,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:05,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:05,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987620605] [2021-06-12 20:10:05,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987620605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:05,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795985986] [2021-06-12 20:10:05,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:05,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:10:05,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:05,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:10:05,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:05,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:10:05,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:05,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:10:05,578 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:05,586 INFO L628 ElimStorePlain]: treesize reduction 3, result has 76.9 percent of original size [2021-06-12 20:10:05,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:10:05,587 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:37, output treesize:10 [2021-06-12 20:10:05,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:05,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:05,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:05,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:05,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:05,619 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:10:05,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:10:05,620 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-12 20:10:05,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:05,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795985986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:05,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:05,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:10:05,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134252567] [2021-06-12 20:10:05,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:10:05,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:05,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:10:05,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:10:05,636 INFO L87 Difference]: Start difference. First operand 440 states and 1358 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:05,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:05,762 INFO L93 Difference]: Finished difference Result 777 states and 2357 transitions. [2021-06-12 20:10:05,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:10:05,762 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:10:05,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:05,763 INFO L225 Difference]: With dead ends: 777 [2021-06-12 20:10:05,763 INFO L226 Difference]: Without dead ends: 740 [2021-06-12 20:10:05,763 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:10:05,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-06-12 20:10:05,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 440. [2021-06-12 20:10:05,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 3.093394077448747) internal successors, (1358), 439 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:05,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1358 transitions. [2021-06-12 20:10:05,769 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1358 transitions. Word has length 22 [2021-06-12 20:10:05,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:05,769 INFO L482 AbstractCegarLoop]: Abstraction has 440 states and 1358 transitions. [2021-06-12 20:10:05,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:05,769 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1358 transitions. [2021-06-12 20:10:05,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:10:05,770 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:05,770 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:05,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6772 [2021-06-12 20:10:05,970 INFO L430 AbstractCegarLoop]: === Iteration 1160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:05,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:05,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1744354738, now seen corresponding path program 1148 times [2021-06-12 20:10:05,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:05,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120720127] [2021-06-12 20:10:05,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:05,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:06,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:06,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120720127] [2021-06-12 20:10:06,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120720127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:06,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733102498] [2021-06-12 20:10:06,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:06,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:10:06,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:06,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:10:06,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:06,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:06,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:06,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:06,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:06,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:06,168 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:06,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:06,172 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:06,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:06,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:06,175 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:06,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:06,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-06-12 20:10:06,204 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:105, output treesize:73 [2021-06-12 20:10:06,412 INFO L446 ElimStorePlain]: Different costs {0=[o_2, o_4, v_prenex_452, v_prenex_453, v_prenex_455, v_prenex_458], 1=[v_prenex_454, v_prenex_457]} [2021-06-12 20:10:06,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:06,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:06,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:06,456 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:10:06,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:06,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:06,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:06,496 INFO L518 ElimStorePlain]: Eliminatee v_prenex_453 vanished before elimination [2021-06-12 20:10:06,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:06,499 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:06,563 INFO L628 ElimStorePlain]: treesize reduction 9, result has 91.0 percent of original size [2021-06-12 20:10:06,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:06,566 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:06,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:06,596 INFO L518 ElimStorePlain]: Eliminatee v_prenex_454 vanished before elimination [2021-06-12 20:10:06,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:06,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-06-12 20:10:06,599 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:06,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:06,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:10:06,630 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:125, output treesize:46 [2021-06-12 20:10:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:06,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733102498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:06,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:06,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:10:06,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717649787] [2021-06-12 20:10:06,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:10:06,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:06,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:10:06,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:10:06,692 INFO L87 Difference]: Start difference. First operand 440 states and 1358 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:07,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:07,085 INFO L93 Difference]: Finished difference Result 674 states and 2020 transitions. [2021-06-12 20:10:07,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:10:07,085 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:10:07,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:07,086 INFO L225 Difference]: With dead ends: 674 [2021-06-12 20:10:07,086 INFO L226 Difference]: Without dead ends: 639 [2021-06-12 20:10:07,086 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 465.8ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:10:07,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-06-12 20:10:07,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 456. [2021-06-12 20:10:07,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.098901098901099) internal successors, (1410), 455 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:07,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1410 transitions. [2021-06-12 20:10:07,091 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1410 transitions. Word has length 22 [2021-06-12 20:10:07,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:07,091 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1410 transitions. [2021-06-12 20:10:07,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:07,091 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1410 transitions. [2021-06-12 20:10:07,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:10:07,092 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:07,092 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:07,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6779,1149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:07,292 INFO L430 AbstractCegarLoop]: === Iteration 1161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:07,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:07,293 INFO L82 PathProgramCache]: Analyzing trace with hash -2009772560, now seen corresponding path program 1149 times [2021-06-12 20:10:07,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:07,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200422690] [2021-06-12 20:10:07,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:07,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:07,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:07,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200422690] [2021-06-12 20:10:07,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200422690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:07,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950396463] [2021-06-12 20:10:07,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:07,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:10:07,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:07,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:10:07,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:07,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:07,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:07,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:07,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:07,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:07,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:07,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:07,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:07,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:07,493 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:07,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:07,496 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:07,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:07,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-06-12 20:10:07,525 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:105, output treesize:73 [2021-06-12 20:10:07,695 INFO L446 ElimStorePlain]: Different costs {0=[o_2, o_4, v_prenex_461, v_prenex_462, v_prenex_464, v_prenex_467], 1=[v_prenex_463, v_prenex_465]} [2021-06-12 20:10:07,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:07,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:07,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:07,737 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:10:07,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:07,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:07,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:07,777 INFO L518 ElimStorePlain]: Eliminatee v_prenex_462 vanished before elimination [2021-06-12 20:10:07,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:07,780 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:07,845 INFO L628 ElimStorePlain]: treesize reduction 9, result has 91.0 percent of original size [2021-06-12 20:10:07,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:07,848 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:07,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:07,878 INFO L518 ElimStorePlain]: Eliminatee v_prenex_463 vanished before elimination [2021-06-12 20:10:07,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:07,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-06-12 20:10:07,881 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:07,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:07,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:10:07,913 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:125, output treesize:46 [2021-06-12 20:10:08,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:08,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950396463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:08,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:08,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:10:08,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251168618] [2021-06-12 20:10:08,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:10:08,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:08,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:10:08,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:10:08,009 INFO L87 Difference]: Start difference. First operand 456 states and 1410 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:08,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:08,370 INFO L93 Difference]: Finished difference Result 637 states and 1922 transitions. [2021-06-12 20:10:08,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:10:08,371 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:10:08,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:08,372 INFO L225 Difference]: With dead ends: 637 [2021-06-12 20:10:08,372 INFO L226 Difference]: Without dead ends: 610 [2021-06-12 20:10:08,372 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 456.1ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:10:08,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-06-12 20:10:08,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 435. [2021-06-12 20:10:08,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.1013824884792625) internal successors, (1346), 434 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:08,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1346 transitions. [2021-06-12 20:10:08,377 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1346 transitions. Word has length 22 [2021-06-12 20:10:08,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:08,377 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 1346 transitions. [2021-06-12 20:10:08,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:08,377 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1346 transitions. [2021-06-12 20:10:08,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:10:08,377 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:08,377 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:08,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6790 [2021-06-12 20:10:08,578 INFO L430 AbstractCegarLoop]: === Iteration 1162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:08,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:08,578 INFO L82 PathProgramCache]: Analyzing trace with hash 882565554, now seen corresponding path program 1150 times [2021-06-12 20:10:08,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:08,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976705380] [2021-06-12 20:10:08,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:08,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:08,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976705380] [2021-06-12 20:10:08,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976705380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:08,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88446332] [2021-06-12 20:10:08,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:08,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:10:08,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:08,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:10:08,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:08,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:08,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:08,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:08,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:08,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:08,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:10:08,706 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:10:08,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:08,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:08,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:08,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:08,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:08,754 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:10:08,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:10:08,755 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:5 [2021-06-12 20:10:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:08,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88446332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:08,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:08,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:10:08,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155298976] [2021-06-12 20:10:08,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:10:08,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:08,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:10:08,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:10:08,762 INFO L87 Difference]: Start difference. First operand 435 states and 1346 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:08,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:08,936 INFO L93 Difference]: Finished difference Result 682 states and 2079 transitions. [2021-06-12 20:10:08,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:10:08,936 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:10:08,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:08,937 INFO L225 Difference]: With dead ends: 682 [2021-06-12 20:10:08,937 INFO L226 Difference]: Without dead ends: 633 [2021-06-12 20:10:08,937 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 123.4ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:10:08,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-12 20:10:08,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 439. [2021-06-12 20:10:08,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 3.095890410958904) internal successors, (1356), 438 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:08,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1356 transitions. [2021-06-12 20:10:08,942 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1356 transitions. Word has length 22 [2021-06-12 20:10:08,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:08,942 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1356 transitions. [2021-06-12 20:10:08,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:08,942 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1356 transitions. [2021-06-12 20:10:08,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:10:08,943 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:08,943 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:09,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6801,1151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:09,143 INFO L430 AbstractCegarLoop]: === Iteration 1163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:09,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:09,144 INFO L82 PathProgramCache]: Analyzing trace with hash -943635512, now seen corresponding path program 1151 times [2021-06-12 20:10:09,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:09,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986842344] [2021-06-12 20:10:09,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:09,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:09,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:09,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:09,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986842344] [2021-06-12 20:10:09,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986842344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:09,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971427667] [2021-06-12 20:10:09,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:09,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:10:09,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:09,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:10:09,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:09,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:09,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:09,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:09,266 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:09,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:09,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:10:09,273 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:10:09,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:09,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:09,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:09,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:09,316 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-12 20:10:09,317 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:10:09,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:10:09,317 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:6 [2021-06-12 20:10:09,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:09,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971427667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:09,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:09,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:10:09,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988354231] [2021-06-12 20:10:09,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:10:09,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:09,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:10:09,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:10:09,328 INFO L87 Difference]: Start difference. First operand 439 states and 1356 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:09,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:09,474 INFO L93 Difference]: Finished difference Result 746 states and 2265 transitions. [2021-06-12 20:10:09,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:10:09,475 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:10:09,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:09,475 INFO L225 Difference]: With dead ends: 746 [2021-06-12 20:10:09,476 INFO L226 Difference]: Without dead ends: 706 [2021-06-12 20:10:09,476 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:10:09,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-06-12 20:10:09,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 459. [2021-06-12 20:10:09,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 3.106986899563319) internal successors, (1423), 458 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:09,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1423 transitions. [2021-06-12 20:10:09,481 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1423 transitions. Word has length 22 [2021-06-12 20:10:09,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:09,481 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 1423 transitions. [2021-06-12 20:10:09,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:09,481 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1423 transitions. [2021-06-12 20:10:09,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:10:09,482 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:09,482 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:09,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6807 [2021-06-12 20:10:09,682 INFO L430 AbstractCegarLoop]: === Iteration 1164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:09,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:09,682 INFO L82 PathProgramCache]: Analyzing trace with hash 937117426, now seen corresponding path program 1152 times [2021-06-12 20:10:09,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:09,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070650967] [2021-06-12 20:10:09,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:09,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:09,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:09,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070650967] [2021-06-12 20:10:09,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070650967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:09,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231979322] [2021-06-12 20:10:09,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:09,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:10:09,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:09,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:10:09,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:09,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:09,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:09,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:09,805 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:09,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:09,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:10:09,812 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-12 20:10:09,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:09,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:09,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:09,853 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:09,861 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-12 20:10:09,861 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:10:09,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:10:09,861 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:6 [2021-06-12 20:10:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:09,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231979322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:09,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:09,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 20:10:09,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159854269] [2021-06-12 20:10:09,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:10:09,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:09,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:10:09,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:10:09,871 INFO L87 Difference]: Start difference. First operand 459 states and 1423 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:10,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:10,042 INFO L93 Difference]: Finished difference Result 689 states and 2088 transitions. [2021-06-12 20:10:10,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:10:10,043 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:10:10,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:10,044 INFO L225 Difference]: With dead ends: 689 [2021-06-12 20:10:10,044 INFO L226 Difference]: Without dead ends: 639 [2021-06-12 20:10:10,044 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:10:10,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-06-12 20:10:10,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 434. [2021-06-12 20:10:10,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.115473441108545) internal successors, (1349), 433 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:10,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1349 transitions. [2021-06-12 20:10:10,049 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1349 transitions. Word has length 22 [2021-06-12 20:10:10,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:10,049 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 1349 transitions. [2021-06-12 20:10:10,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:10,049 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1349 transitions. [2021-06-12 20:10:10,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:10:10,049 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:10,049 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:10,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6815,1153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:10,250 INFO L430 AbstractCegarLoop]: === Iteration 1165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:10,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:10,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1344434634, now seen corresponding path program 1153 times [2021-06-12 20:10:10,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:10,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045582938] [2021-06-12 20:10:10,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:10,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:10,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:10,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045582938] [2021-06-12 20:10:10,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045582938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:10,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418510072] [2021-06-12 20:10:10,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:10,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:10,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:10:10,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:10,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:10,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:10,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:10:10,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:10,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:10:10,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:10,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:10:10,439 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:10,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:10,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-06-12 20:10:10,460 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:28 [2021-06-12 20:10:10,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:10,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:10,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:10,522 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:10:10,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:10:10,522 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2021-06-12 20:10:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:10,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418510072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:10,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:10,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:10:10,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129830234] [2021-06-12 20:10:10,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:10:10,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:10,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:10:10,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:10:10,530 INFO L87 Difference]: Start difference. First operand 434 states and 1349 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:10,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:10,693 INFO L93 Difference]: Finished difference Result 747 states and 2298 transitions. [2021-06-12 20:10:10,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:10:10,693 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:10:10,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:10,694 INFO L225 Difference]: With dead ends: 747 [2021-06-12 20:10:10,694 INFO L226 Difference]: Without dead ends: 719 [2021-06-12 20:10:10,694 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:10:10,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-06-12 20:10:10,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 441. [2021-06-12 20:10:10,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 3.125) internal successors, (1375), 440 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:10,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1375 transitions. [2021-06-12 20:10:10,700 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1375 transitions. Word has length 22 [2021-06-12 20:10:10,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:10,700 INFO L482 AbstractCegarLoop]: Abstraction has 441 states and 1375 transitions. [2021-06-12 20:10:10,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:10,700 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1375 transitions. [2021-06-12 20:10:10,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:10:10,700 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:10,700 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:10,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6823,1154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:10,901 INFO L430 AbstractCegarLoop]: === Iteration 1166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:10,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:10,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1264140822, now seen corresponding path program 1154 times [2021-06-12 20:10:10,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:10,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879058298] [2021-06-12 20:10:10,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:10,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:10,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:10,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879058298] [2021-06-12 20:10:10,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879058298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:10,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181845706] [2021-06-12 20:10:10,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:11,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:10:11,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:11,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:10:11,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:11,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:11,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:11,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:10:11,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:11,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:10:11,082 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:11,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:10:11,085 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:11,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:11,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-06-12 20:10:11,108 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:28 [2021-06-12 20:10:11,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:11,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:11,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:11,155 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:11,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:11,161 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:10:11,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:10:11,161 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-12 20:10:11,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:11,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181845706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:11,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:11,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:10:11,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230789394] [2021-06-12 20:10:11,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:10:11,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:11,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:10:11,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:10:11,187 INFO L87 Difference]: Start difference. First operand 441 states and 1375 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:11,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:11,366 INFO L93 Difference]: Finished difference Result 789 states and 2415 transitions. [2021-06-12 20:10:11,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:10:11,366 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:10:11,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:11,367 INFO L225 Difference]: With dead ends: 789 [2021-06-12 20:10:11,367 INFO L226 Difference]: Without dead ends: 755 [2021-06-12 20:10:11,368 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 176.4ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:10:11,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-06-12 20:10:11,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 447. [2021-06-12 20:10:11,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 3.1300448430493275) internal successors, (1396), 446 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:11,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1396 transitions. [2021-06-12 20:10:11,373 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1396 transitions. Word has length 22 [2021-06-12 20:10:11,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:11,373 INFO L482 AbstractCegarLoop]: Abstraction has 447 states and 1396 transitions. [2021-06-12 20:10:11,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:11,373 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1396 transitions. [2021-06-12 20:10:11,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:10:11,374 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:11,374 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:11,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6833 [2021-06-12 20:10:11,574 INFO L430 AbstractCegarLoop]: === Iteration 1167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:11,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:11,574 INFO L82 PathProgramCache]: Analyzing trace with hash -967562800, now seen corresponding path program 1155 times [2021-06-12 20:10:11,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:11,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513113413] [2021-06-12 20:10:11,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:11,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:11,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:11,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513113413] [2021-06-12 20:10:11,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513113413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:11,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706736800] [2021-06-12 20:10:11,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:11,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:10:11,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:11,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:10:11,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:11,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:11,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:11,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:11,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:11,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:11,819 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:11,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:11,822 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:11,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:11,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:11,826 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:11,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:11,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:10:11,870 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:89 [2021-06-12 20:10:12,252 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_480, v_prenex_482, v_prenex_477, v_prenex_478], 1=[o_2, o_4, v_prenex_475, v_prenex_476]} [2021-06-12 20:10:12,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:12,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:12,315 INFO L628 ElimStorePlain]: treesize reduction 40, result has 68.8 percent of original size [2021-06-12 20:10:12,315 INFO L518 ElimStorePlain]: Eliminatee v_prenex_482 vanished before elimination [2021-06-12 20:10:12,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:12,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:12,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:12,344 INFO L518 ElimStorePlain]: Eliminatee v_prenex_478 vanished before elimination [2021-06-12 20:10:12,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:12,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:12,347 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:12,389 INFO L628 ElimStorePlain]: treesize reduction 9, result has 86.2 percent of original size [2021-06-12 20:10:12,390 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:10:12,390 INFO L518 ElimStorePlain]: Eliminatee v_prenex_475 vanished before elimination [2021-06-12 20:10:12,390 INFO L518 ElimStorePlain]: Eliminatee v_prenex_476 vanished before elimination [2021-06-12 20:10:12,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:10:12,392 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 16 variables, input treesize:137, output treesize:13 [2021-06-12 20:10:12,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:12,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706736800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:12,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:12,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:10:12,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240097840] [2021-06-12 20:10:12,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:10:12,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:12,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:10:12,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:10:12,421 INFO L87 Difference]: Start difference. First operand 447 states and 1396 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:12,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:12,844 INFO L93 Difference]: Finished difference Result 659 states and 1999 transitions. [2021-06-12 20:10:12,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:10:12,845 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:10:12,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:12,845 INFO L225 Difference]: With dead ends: 659 [2021-06-12 20:10:12,845 INFO L226 Difference]: Without dead ends: 616 [2021-06-12 20:10:12,845 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 544.7ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:10:12,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-06-12 20:10:12,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 451. [2021-06-12 20:10:12,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 3.12) internal successors, (1404), 450 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:12,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1404 transitions. [2021-06-12 20:10:12,850 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1404 transitions. Word has length 22 [2021-06-12 20:10:12,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:12,851 INFO L482 AbstractCegarLoop]: Abstraction has 451 states and 1404 transitions. [2021-06-12 20:10:12,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:12,851 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1404 transitions. [2021-06-12 20:10:12,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:10:12,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:12,851 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:13,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6841,1156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:13,052 INFO L430 AbstractCegarLoop]: === Iteration 1168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:13,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:13,052 INFO L82 PathProgramCache]: Analyzing trace with hash -229023312, now seen corresponding path program 1156 times [2021-06-12 20:10:13,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:13,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043097981] [2021-06-12 20:10:13,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:13,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:13,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:13,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043097981] [2021-06-12 20:10:13,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043097981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:13,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539757958] [2021-06-12 20:10:13,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:13,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:10:13,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:13,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:10:13,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:13,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:13,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:13,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:13,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:13,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:13,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:13,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:13,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:13,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:13,327 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:13,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:13,330 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:13,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:13,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:10:13,374 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:89 [2021-06-12 20:10:13,668 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_490, o_2, v_prenex_491, o_4], 1=[v_prenex_494, v_prenex_495, v_prenex_498, v_prenex_499]} [2021-06-12 20:10:13,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:13,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:13,735 INFO L628 ElimStorePlain]: treesize reduction 46, result has 65.9 percent of original size [2021-06-12 20:10:13,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:13,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:13,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:13,766 INFO L518 ElimStorePlain]: Eliminatee v_prenex_491 vanished before elimination [2021-06-12 20:10:13,766 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:10:13,766 INFO L518 ElimStorePlain]: Eliminatee v_prenex_494 vanished before elimination [2021-06-12 20:10:13,766 INFO L518 ElimStorePlain]: Eliminatee v_prenex_495 vanished before elimination [2021-06-12 20:10:13,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:13,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:13,769 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:13,813 INFO L628 ElimStorePlain]: treesize reduction 9, result has 86.4 percent of original size [2021-06-12 20:10:13,813 INFO L518 ElimStorePlain]: Eliminatee v_prenex_499 vanished before elimination [2021-06-12 20:10:13,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:10:13,815 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 16 variables, input treesize:144, output treesize:14 [2021-06-12 20:10:13,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:13,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539757958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:13,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:13,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:10:13,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596616356] [2021-06-12 20:10:13,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:10:13,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:13,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:10:13,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:10:13,861 INFO L87 Difference]: Start difference. First operand 451 states and 1404 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:14,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:14,564 INFO L93 Difference]: Finished difference Result 725 states and 2147 transitions. [2021-06-12 20:10:14,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:10:14,565 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:10:14,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:14,566 INFO L225 Difference]: With dead ends: 725 [2021-06-12 20:10:14,566 INFO L226 Difference]: Without dead ends: 690 [2021-06-12 20:10:14,566 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 770.9ms TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:10:14,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-06-12 20:10:14,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 467. [2021-06-12 20:10:14,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.107296137339056) internal successors, (1448), 466 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:14,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1448 transitions. [2021-06-12 20:10:14,571 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1448 transitions. Word has length 22 [2021-06-12 20:10:14,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:14,572 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1448 transitions. [2021-06-12 20:10:14,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:14,572 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1448 transitions. [2021-06-12 20:10:14,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:10:14,572 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:14,572 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:14,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6865,1157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:14,773 INFO L430 AbstractCegarLoop]: === Iteration 1169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:14,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:14,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1457368528, now seen corresponding path program 1157 times [2021-06-12 20:10:14,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:14,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343156869] [2021-06-12 20:10:14,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:14,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:14,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:14,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343156869] [2021-06-12 20:10:14,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343156869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:14,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113424517] [2021-06-12 20:10:14,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:14,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:10:14,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:14,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:10:14,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:14,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:14,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:14,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:14,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:14,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:14,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:14,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:10:14,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:14,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:14,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:14,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:10:14,982 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:14,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:14,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:10:14,985 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:15,074 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.3 percent of original size [2021-06-12 20:10:15,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-12 20:10:15,080 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:101 [2021-06-12 20:10:15,333 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:15,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113424517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:15,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:15,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:10:15,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705685795] [2021-06-12 20:10:15,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:10:15,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:15,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:10:15,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:10:15,334 INFO L87 Difference]: Start difference. First operand 467 states and 1448 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:16,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:16,297 INFO L93 Difference]: Finished difference Result 701 states and 2077 transitions. [2021-06-12 20:10:16,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:10:16,297 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:10:16,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:16,298 INFO L225 Difference]: With dead ends: 701 [2021-06-12 20:10:16,298 INFO L226 Difference]: Without dead ends: 664 [2021-06-12 20:10:16,298 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 915.5ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:10:16,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-06-12 20:10:16,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 453. [2021-06-12 20:10:16,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 3.1238938053097347) internal successors, (1412), 452 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:16,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1412 transitions. [2021-06-12 20:10:16,303 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1412 transitions. Word has length 22 [2021-06-12 20:10:16,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:16,303 INFO L482 AbstractCegarLoop]: Abstraction has 453 states and 1412 transitions. [2021-06-12 20:10:16,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:16,303 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1412 transitions. [2021-06-12 20:10:16,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:10:16,304 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:16,304 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:16,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6884 [2021-06-12 20:10:16,504 INFO L430 AbstractCegarLoop]: === Iteration 1170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:16,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:16,505 INFO L82 PathProgramCache]: Analyzing trace with hash 468612220, now seen corresponding path program 1158 times [2021-06-12 20:10:16,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:16,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631197323] [2021-06-12 20:10:16,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:16,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:16,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631197323] [2021-06-12 20:10:16,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631197323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:16,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304218396] [2021-06-12 20:10:16,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:16,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:10:16,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:16,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:10:16,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:16,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:10:16,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:16,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:10:16,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:16,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:10:16,649 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:16,657 INFO L628 ElimStorePlain]: treesize reduction 3, result has 76.9 percent of original size [2021-06-12 20:10:16,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:10:16,657 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:37, output treesize:10 [2021-06-12 20:10:16,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:16,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:16,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:16,706 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:10:16,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:10:16,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2021-06-12 20:10:16,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:16,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304218396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:16,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:16,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:10:16,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912037874] [2021-06-12 20:10:16,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:10:16,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:16,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:10:16,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:10:16,715 INFO L87 Difference]: Start difference. First operand 453 states and 1412 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:16,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:16,868 INFO L93 Difference]: Finished difference Result 743 states and 2274 transitions. [2021-06-12 20:10:16,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:10:16,868 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:10:16,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:16,869 INFO L225 Difference]: With dead ends: 743 [2021-06-12 20:10:16,869 INFO L226 Difference]: Without dead ends: 715 [2021-06-12 20:10:16,869 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 111.3ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:10:16,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-06-12 20:10:16,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 448. [2021-06-12 20:10:16,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 3.1073825503355703) internal successors, (1389), 447 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:16,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1389 transitions. [2021-06-12 20:10:16,874 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1389 transitions. Word has length 22 [2021-06-12 20:10:16,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:16,874 INFO L482 AbstractCegarLoop]: Abstraction has 448 states and 1389 transitions. [2021-06-12 20:10:16,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:16,874 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1389 transitions. [2021-06-12 20:10:16,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:10:16,875 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:16,875 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:17,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6894 [2021-06-12 20:10:17,075 INFO L430 AbstractCegarLoop]: === Iteration 1171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:17,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:17,076 INFO L82 PathProgramCache]: Analyzing trace with hash 871727726, now seen corresponding path program 1159 times [2021-06-12 20:10:17,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:17,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571854984] [2021-06-12 20:10:17,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:17,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:17,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571854984] [2021-06-12 20:10:17,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571854984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:17,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671437651] [2021-06-12 20:10:17,181 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:17,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:17,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:10:17,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:17,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:17,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:17,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:17,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:17,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:17,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:17,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:17,292 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:17,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:17,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:17,296 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:17,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:17,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:10:17,341 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:89 [2021-06-12 20:10:17,785 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_519, v_prenex_520, v_prenex_523, v_prenex_524], 1=[v_prenex_515, v_prenex_516, o_2, o_4]} [2021-06-12 20:10:17,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:17,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:17,844 INFO L628 ElimStorePlain]: treesize reduction 40, result has 66.9 percent of original size [2021-06-12 20:10:17,844 INFO L518 ElimStorePlain]: Eliminatee v_prenex_520 vanished before elimination [2021-06-12 20:10:17,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:17,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:17,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:17,872 INFO L518 ElimStorePlain]: Eliminatee v_prenex_524 vanished before elimination [2021-06-12 20:10:17,872 INFO L518 ElimStorePlain]: Eliminatee v_prenex_515 vanished before elimination [2021-06-12 20:10:17,872 INFO L518 ElimStorePlain]: Eliminatee v_prenex_516 vanished before elimination [2021-06-12 20:10:17,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:17,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:17,876 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:17,918 INFO L628 ElimStorePlain]: treesize reduction 9, result has 86.2 percent of original size [2021-06-12 20:10:17,918 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:10:17,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:10:17,920 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 16 variables, input treesize:137, output treesize:13 [2021-06-12 20:10:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:17,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671437651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:17,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:17,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:10:17,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050202036] [2021-06-12 20:10:17,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:10:17,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:17,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:10:17,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:10:17,933 INFO L87 Difference]: Start difference. First operand 448 states and 1389 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:18,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:18,372 INFO L93 Difference]: Finished difference Result 641 states and 1933 transitions. [2021-06-12 20:10:18,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:10:18,372 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:10:18,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:18,373 INFO L225 Difference]: With dead ends: 641 [2021-06-12 20:10:18,373 INFO L226 Difference]: Without dead ends: 598 [2021-06-12 20:10:18,373 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 589.2ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:10:18,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-06-12 20:10:18,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 438. [2021-06-12 20:10:18,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.1121281464530894) internal successors, (1360), 437 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:18,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1360 transitions. [2021-06-12 20:10:18,378 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1360 transitions. Word has length 22 [2021-06-12 20:10:18,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:18,378 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1360 transitions. [2021-06-12 20:10:18,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:18,378 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1360 transitions. [2021-06-12 20:10:18,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:10:18,378 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:18,379 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:18,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6901 [2021-06-12 20:10:18,579 INFO L430 AbstractCegarLoop]: === Iteration 1172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:18,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:18,579 INFO L82 PathProgramCache]: Analyzing trace with hash -946762092, now seen corresponding path program 1160 times [2021-06-12 20:10:18,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:18,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963305674] [2021-06-12 20:10:18,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:18,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:18,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963305674] [2021-06-12 20:10:18,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963305674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:18,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706383803] [2021-06-12 20:10:18,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:18,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:10:18,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:18,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:10:18,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:18,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:10:18,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:18,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:10:18,722 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:18,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:10:18,724 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:18,732 INFO L628 ElimStorePlain]: treesize reduction 3, result has 76.9 percent of original size [2021-06-12 20:10:18,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:10:18,733 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:37, output treesize:10 [2021-06-12 20:10:18,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:18,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:18,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:18,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:18,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:18,776 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:10:18,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:10:18,776 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-12 20:10:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:18,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706383803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:18,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:18,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 20:10:18,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210553572] [2021-06-12 20:10:18,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:10:18,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:18,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:10:18,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:10:18,792 INFO L87 Difference]: Start difference. First operand 438 states and 1360 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:18,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:18,947 INFO L93 Difference]: Finished difference Result 738 states and 2269 transitions. [2021-06-12 20:10:18,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:10:18,947 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:10:18,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:18,948 INFO L225 Difference]: With dead ends: 738 [2021-06-12 20:10:18,948 INFO L226 Difference]: Without dead ends: 701 [2021-06-12 20:10:18,948 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:10:18,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-06-12 20:10:18,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 438. [2021-06-12 20:10:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.1121281464530894) internal successors, (1360), 437 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:18,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1360 transitions. [2021-06-12 20:10:18,953 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1360 transitions. Word has length 22 [2021-06-12 20:10:18,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:18,953 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1360 transitions. [2021-06-12 20:10:18,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:18,953 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1360 transitions. [2021-06-12 20:10:18,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:10:18,954 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:18,954 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:19,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6923,1161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:19,154 INFO L430 AbstractCegarLoop]: === Iteration 1173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:19,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:19,155 INFO L82 PathProgramCache]: Analyzing trace with hash -2041461010, now seen corresponding path program 1161 times [2021-06-12 20:10:19,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:19,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791320099] [2021-06-12 20:10:19,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:19,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:19,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:19,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:19,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791320099] [2021-06-12 20:10:19,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791320099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:19,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253059608] [2021-06-12 20:10:19,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:19,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:10:19,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:19,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:10:19,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:19,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:19,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:19,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:19,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:19,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:19,379 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:19,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:19,383 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:19,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:19,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:19,386 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:19,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:19,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:10:19,430 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:89 [2021-06-12 20:10:19,699 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_529, o_4, v_prenex_530], 1=[v_prenex_531, v_prenex_532, v_prenex_534, v_prenex_535]} [2021-06-12 20:10:19,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:19,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:19,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:19,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:19,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:19,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:19,809 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:10:19,809 INFO L518 ElimStorePlain]: Eliminatee v_prenex_530 vanished before elimination [2021-06-12 20:10:19,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:19,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:19,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:19,903 INFO L628 ElimStorePlain]: treesize reduction 9, result has 93.2 percent of original size [2021-06-12 20:10:19,904 INFO L518 ElimStorePlain]: Eliminatee v_prenex_532 vanished before elimination [2021-06-12 20:10:19,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:19,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:19,908 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:19,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:19,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:19,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-06-12 20:10:19,954 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:19,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:19,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:10:19,997 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 16 variables, input treesize:157, output treesize:52 [2021-06-12 20:10:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:20,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253059608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:20,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:20,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:10:20,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775589893] [2021-06-12 20:10:20,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:10:20,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:20,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:10:20,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:10:20,061 INFO L87 Difference]: Start difference. First operand 438 states and 1360 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:20,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:20,779 INFO L93 Difference]: Finished difference Result 696 states and 2102 transitions. [2021-06-12 20:10:20,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:10:20,779 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:10:20,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:20,780 INFO L225 Difference]: With dead ends: 696 [2021-06-12 20:10:20,780 INFO L226 Difference]: Without dead ends: 661 [2021-06-12 20:10:20,780 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 790.9ms TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:10:20,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-06-12 20:10:20,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 454. [2021-06-12 20:10:20,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 3.116997792494481) internal successors, (1412), 453 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:20,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1412 transitions. [2021-06-12 20:10:20,785 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1412 transitions. Word has length 22 [2021-06-12 20:10:20,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:20,785 INFO L482 AbstractCegarLoop]: Abstraction has 454 states and 1412 transitions. [2021-06-12 20:10:20,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:20,786 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1412 transitions. [2021-06-12 20:10:20,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:10:20,786 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:20,786 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:20,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6931,1162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:20,986 INFO L430 AbstractCegarLoop]: === Iteration 1174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:20,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:20,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1988088464, now seen corresponding path program 1162 times [2021-06-12 20:10:20,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:20,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148669767] [2021-06-12 20:10:20,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:20,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:21,097 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:21,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:21,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148669767] [2021-06-12 20:10:21,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148669767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:21,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040404430] [2021-06-12 20:10:21,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:21,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:10:21,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:21,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:10:21,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:21,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:21,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:21,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:21,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:21,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:21,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:21,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:21,253 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:21,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:21,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:21,257 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:21,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:21,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:10:21,302 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:89 [2021-06-12 20:10:21,571 INFO L446 ElimStorePlain]: Different costs {0=[o_2, o_4, v_prenex_541, v_prenex_542], 1=[v_prenex_543, v_prenex_544, v_prenex_545, v_prenex_546]} [2021-06-12 20:10:21,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:21,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:21,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:21,627 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:10:21,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:21,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:21,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:21,681 INFO L518 ElimStorePlain]: Eliminatee v_prenex_542 vanished before elimination [2021-06-12 20:10:21,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:21,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:21,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:21,773 INFO L628 ElimStorePlain]: treesize reduction 9, result has 93.2 percent of original size [2021-06-12 20:10:21,774 INFO L518 ElimStorePlain]: Eliminatee v_prenex_544 vanished before elimination [2021-06-12 20:10:21,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:21,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:21,778 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:21,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:21,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:21,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-06-12 20:10:21,824 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:21,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:21,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:10:21,866 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 16 variables, input treesize:157, output treesize:58 [2021-06-12 20:10:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:21,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040404430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:21,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:21,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:10:21,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920552877] [2021-06-12 20:10:21,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:10:21,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:21,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:10:21,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:10:21,957 INFO L87 Difference]: Start difference. First operand 454 states and 1412 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:22,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:22,430 INFO L93 Difference]: Finished difference Result 659 states and 2004 transitions. [2021-06-12 20:10:22,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:10:22,430 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:10:22,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:22,431 INFO L225 Difference]: With dead ends: 659 [2021-06-12 20:10:22,431 INFO L226 Difference]: Without dead ends: 632 [2021-06-12 20:10:22,431 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 578.6ms TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:10:22,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-06-12 20:10:22,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 434. [2021-06-12 20:10:22,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.113163972286374) internal successors, (1348), 433 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:22,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1348 transitions. [2021-06-12 20:10:22,436 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1348 transitions. Word has length 22 [2021-06-12 20:10:22,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:22,436 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 1348 transitions. [2021-06-12 20:10:22,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:22,436 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1348 transitions. [2021-06-12 20:10:22,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:10:22,437 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:22,437 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:22,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6943,1163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:22,637 INFO L430 AbstractCegarLoop]: === Iteration 1175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:22,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:22,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1269359596, now seen corresponding path program 1163 times [2021-06-12 20:10:22,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:22,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542368222] [2021-06-12 20:10:22,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:22,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:22,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542368222] [2021-06-12 20:10:22,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542368222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:22,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194817004] [2021-06-12 20:10:22,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:22,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:10:22,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:22,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:10:22,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:22,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:10:22,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:22,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:10:22,818 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:22,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:22,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:10:22,821 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:22,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:22,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-06-12 20:10:22,849 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:28 [2021-06-12 20:10:22,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:22,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:22,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:22,881 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:22,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:22,883 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:22,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:22,891 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:10:22,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:10:22,892 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:49, output treesize:18 [2021-06-12 20:10:22,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:22,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194817004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:22,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:22,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:10:22,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713599303] [2021-06-12 20:10:22,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:10:22,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:22,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:10:22,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:10:22,938 INFO L87 Difference]: Start difference. First operand 434 states and 1348 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:23,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:23,155 INFO L93 Difference]: Finished difference Result 788 states and 2408 transitions. [2021-06-12 20:10:23,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:10:23,155 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:10:23,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:23,156 INFO L225 Difference]: With dead ends: 788 [2021-06-12 20:10:23,156 INFO L226 Difference]: Without dead ends: 754 [2021-06-12 20:10:23,156 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 201.3ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:10:23,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-06-12 20:10:23,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 448. [2021-06-12 20:10:23,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 3.1185682326621924) internal successors, (1394), 447 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:23,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1394 transitions. [2021-06-12 20:10:23,162 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1394 transitions. Word has length 22 [2021-06-12 20:10:23,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:23,162 INFO L482 AbstractCegarLoop]: Abstraction has 448 states and 1394 transitions. [2021-06-12 20:10:23,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:23,162 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1394 transitions. [2021-06-12 20:10:23,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:10:23,162 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:23,162 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:23,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6952,1164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:23,363 INFO L430 AbstractCegarLoop]: === Iteration 1176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:23,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:23,363 INFO L82 PathProgramCache]: Analyzing trace with hash -928298162, now seen corresponding path program 1164 times [2021-06-12 20:10:23,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:23,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710652652] [2021-06-12 20:10:23,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:23,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:23,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:23,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710652652] [2021-06-12 20:10:23,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710652652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:23,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400701786] [2021-06-12 20:10:23,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:23,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:10:23,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:23,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:10:23,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:23,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:23,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:23,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:23,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:23,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:23,585 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:23,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:10:23,590 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:23,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:10:23,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:10:23,595 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. Received shutdown request... [2021-06-12 20:10:23,637 WARN L222 SmtUtils]: Removed 9 from assertion stack [2021-06-12 20:10:23,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 1165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6960 [2021-06-12 20:10:23,849 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 20:10:23,851 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 20:10:23,852 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 20:10:23,852 INFO L202 PluginConnector]: Adding new model chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 08:10:23 BasicIcfg [2021-06-12 20:10:23,852 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 20:10:23,853 INFO L168 Benchmark]: Toolchain (without parser) took 897548.50 ms. Allocated memory was 178.3 MB in the beginning and 320.9 MB in the end (delta: 142.6 MB). Free memory was 157.6 MB in the beginning and 119.1 MB in the end (delta: 38.6 MB). Peak memory consumption was 181.4 MB. Max. memory is 8.0 GB. [2021-06-12 20:10:23,853 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 178.3 MB. Free memory is still 158.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 20:10:23,853 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.18 ms. Allocated memory is still 178.3 MB. Free memory was 157.6 MB in the beginning and 156.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:10:23,853 INFO L168 Benchmark]: Boogie Preprocessor took 20.53 ms. Allocated memory is still 178.3 MB. Free memory was 156.2 MB in the beginning and 155.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:10:23,853 INFO L168 Benchmark]: RCFGBuilder took 466.39 ms. Allocated memory is still 178.3 MB. Free memory was 155.0 MB in the beginning and 131.9 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2021-06-12 20:10:23,853 INFO L168 Benchmark]: TraceAbstraction took 897026.51 ms. Allocated memory was 178.3 MB in the beginning and 320.9 MB in the end (delta: 142.6 MB). Free memory was 131.4 MB in the beginning and 119.1 MB in the end (delta: 12.4 MB). Peak memory consumption was 155.2 MB. Max. memory is 8.0 GB. [2021-06-12 20:10:23,853 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 178.3 MB. Free memory is still 158.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.18 ms. Allocated memory is still 178.3 MB. Free memory was 157.6 MB in the beginning and 156.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 20.53 ms. Allocated memory is still 178.3 MB. Free memory was 156.2 MB in the beginning and 155.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 466.39 ms. Allocated memory is still 178.3 MB. Free memory was 155.0 MB in the beginning and 131.9 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 897026.51 ms. Allocated memory was 178.3 MB in the beginning and 320.9 MB in the end (delta: 142.6 MB). Free memory was 131.4 MB in the beginning and 119.1 MB in the end (delta: 12.4 MB). Peak memory consumption was 155.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while SimplifyDDAWithTimeout was simplifying term of DAG size 39 for 40ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 896897.6ms, OverallIterations: 1176, TraceHistogramMax: 2, EmptinessCheckTime: 638.4ms, AutomataDifference: 315446.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 57.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 67971 SDtfs, 76533 SDslu, 361927 SDs, 0 SdLazy, 449911 SolverSat, 24172 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 170174.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40308 GetRequests, 16994 SyntacticMatches, 2875 SemanticMatches, 20439 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84392 ImplicationChecksByTransitivity, 272403.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=530occurred in iteration=541, InterpolantAutomatonStates: 13448, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 6217.9ms AutomataMinimizationTime, 1175 MinimizatonAttempts, 216971 StatesRemovedByMinimization, 1171 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4695.8ms SsaConstructionTime, 11111.9ms SatisfiabilityAnalysisTime, 301549.9ms InterpolantComputationTime, 48777 NumberOfCodeBlocks, 48777 NumberOfCodeBlocksAsserted, 3565 NumberOfCheckSat, 46439 ConstructedInterpolants, 1913 QuantifiedInterpolants, 452049 SizeOfPredicates, 11749 NumberOfNonLiveVariables, 101329 ConjunctsInSsa, 22495 ConjunctsInUnsatCore, 2338 InterpolantComputations, 12 PerfectInterpolantSequences, 1598/11067 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown